path: root/tests/runner.py

#!/usr/bin/env python2
# This Python file uses the following encoding: utf-8

'''
Simple test runner

These tests can be run in parallel using nose, for example

  nosetests --processes=4 -v -s tests/runner.py

will use 4 processes. To install nose do something like
|pip install nose| or |sudo apt-get install python-nose|.

Note however that emcc now uses multiple cores when optimizing,
so you may prefer to use fewer cores here.
'''

from subprocess import Popen, PIPE, STDOUT
import os, unittest, tempfile, shutil, time, inspect, sys, math, glob, tempfile, re, difflib, webbrowser, hashlib, threading, platform, BaseHTTPServer, multiprocessing, functools, stat

if len(sys.argv) == 1:
  print '''
==============================================================================
Running the main part of the test suite. Don't forget to run the other parts!

  sanity - tests for first run, etc., modifies ~/.emscripten
  benchmark - run before and after each set of changes before pushing to
              master, verify no regressions
  browser - runs pages in a web browser

To run one of those parts, do something like

  python tests/runner.py sanity

To run a specific set of tests, you can do things like

  python tests/runner.py o1

(that runs the o1 (-O1) tests). You can run individual tests with

  python tests/runner.py test_hello_world

Combinations work too, for example

  python tests/runner.py browser.test_sdl_image

In the main test suite, you can run all variations (O0, O1, O2, etc.) of
an individual test with

  python tests/runner.py ALL.test_hello_world

==============================================================================

'''
  time.sleep(2)

# Setup

__rootpath__ = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
def path_from_root(*pathelems):
  return os.path.join(__rootpath__, *pathelems)
sys.path += [path_from_root(''), path_from_root('third_party/websockify')]
import tools.shared
from tools.shared import *

# Sanity check for config

try:
  assert COMPILER_OPTS != None
except:
  raise Exception('Cannot find "COMPILER_OPTS" definition. Is %s set up properly? You may need to copy the template settings file into it.' % EM_CONFIG)

# Core test runner class, shared between normal tests and benchmarks

class RunnerCore(unittest.TestCase):
  save_dir = os.environ.get('EM_SAVE_DIR')
  save_JS = 0
  stderr_redirect = STDOUT # This avoids cluttering the test runner output, which is stderr too, with compiler warnings etc.
                           # Change this to None to get stderr reporting, for debugging purposes

  def skipme(self): # used by tests we ask on the commandline to be skipped, see right before call to unittest.main
    return self.skip('requested to be skipped')

  def setUp(self):
    global Settings
    Settings.reset()
    Settings = tools.shared.Settings
    self.banned_js_engines = []
    if not self.save_dir:
      dirname = tempfile.mkdtemp(prefix='emscripten_test_' + self.__class__.__name__ + '_', dir=TEMP_DIR)
    else:
      dirname = CANONICAL_TEMP_DIR
    if not os.path.exists(dirname):
      os.makedirs(dirname)
    self.working_dir = dirname
    os.chdir(dirname)

    if not self.save_dir:
      self.has_prev_ll = False
      for temp_file in os.listdir(TEMP_DIR):
        if temp_file.endswith('.ll'):
          self.has_prev_ll = True

  def tearDown(self):
    if not self.save_dir:
      # rmtree() fails on Windows if the current working directory is inside the tree.
      os.chdir(os.path.join(self.get_dir(), '..'))
      shutil.rmtree(self.get_dir())

      # Make sure we don't leave stuff around
      #if not self.has_prev_ll:
      #  for temp_file in os.listdir(TEMP_DIR):
      #    assert not temp_file.endswith('.ll'), temp_file
      #    # TODO assert not temp_file.startswith('emscripten_'), temp_file

  def skip(self, why):
    print >> sys.stderr, '<skipping: %s> ' % why,

  def get_dir(self):
    return self.working_dir

  def in_dir(self, *pathelems):
    return os.path.join(self.get_dir(), *pathelems)

  def get_shared_library_name(self, linux_name):
    if platform.system() == 'Linux':
      return linux_name
    elif platform.system() == 'Darwin':
      return linux_name.replace('.so', '') + '.dylib'
    else:
      print >> sys.stderr, 'get_shared_library_name needs to be implemented on %s' % platform.system()
      return linux_name

  def get_stdout_path(self):
    return os.path.join(self.get_dir(), 'stdout')

  def hardcode_arguments(self, filename, args):
    # Hardcode in the arguments, so js is portable without manual commandlinearguments
    if not args: return
    js = open(filename).read()
    open(filename, 'w').write(js.replace('var ret = run();', 'var ret = run(%s);' % str(args)))

  def prep_ll_run(self, filename, ll_file, force_recompile=False, build_ll_hook=None):
    if ll_file.endswith(('.bc', '.o')):
      if ll_file != filename + '.o':
        shutil.copy(ll_file, filename + '.o')
      Building.llvm_dis(filename)
    else:
      shutil.copy(ll_file, filename + '.o.ll')

    #force_recompile = force_recompile or os.stat(filename + '.o.ll').st_size > 50000 # if the file is big, recompile just to get ll_opts # Recompiling just for dfe in ll_opts is too costly

    if Building.LLVM_OPTS or force_recompile or build_ll_hook:
      Building.ll_opts(filename)
      if build_ll_hook:
        need_post = build_ll_hook(filename)
      Building.llvm_as(filename)
      shutil.move(filename + '.o.ll', filename + '.o.ll.pre') # for comparisons later
      if Building.LLVM_OPTS:
        Building.llvm_opts(filename)
      Building.llvm_dis(filename)
      if build_ll_hook and need_post:
        build_ll_hook(filename)
        Building.llvm_as(filename)
        shutil.move(filename + '.o.ll', filename + '.o.ll.post') # for comparisons later
        Building.llvm_dis(filename)

  # Generate JS from ll, and optionally modify the generated JS with a post_build function. Note
  # that post_build is called on unoptimized JS, so we send it to emcc (otherwise, if run after
  # emcc, it would not apply on the optimized/minified JS)
  def ll_to_js(self, filename, extra_emscripten_args, post_build):
    if type(post_build) in (list, tuple):
      post1, post2 = post_build
    else:
      post1 = post_build
      post2 = None

    def run_post(post):
      if not post: return
      exec post in locals()
      shutil.copyfile(filename + '.o.js', filename + '.o.js.prepost.js')
      process(filename + '.o.js')

    if self.emcc_args is None:
      Building.emscripten(filename, append_ext=True, extra_args=extra_emscripten_args)
      run_post(post1)
      run_post(post2)
    else:
      transform_args = []
      if post1:
        transform_filename = os.path.join(self.get_dir(), 'transform.py')
        transform = open(transform_filename, 'w')
        transform.write('''
import sys
sys.path += [%r]
''' % path_from_root(''))
        transform.write(post1)
        transform.write('''
process(sys.argv[1])
''')
        transform.close()
        transform_args = ['--js-transform', "%s %s" % (PYTHON, transform_filename)]
      Building.emcc(filename + '.o.ll', Settings.serialize() + self.emcc_args + transform_args + Building.COMPILER_TEST_OPTS, filename + '.o.js')
      run_post(post2)

  # Build JavaScript code from source code
  def build(self, src, dirname, filename, output_processor=None, main_file=None, additional_files=[], libraries=[], includes=[], build_ll_hook=None, extra_emscripten_args=[], post_build=None):

    Building.pick_llvm_opts(3) # pick llvm opts here, so we include changes to Settings in the test case code

    # Copy over necessary files for compiling the source
    if main_file is None:
      f = open(filename, 'w')
      f.write(src)
      f.close()
      final_additional_files = []
      for f in additional_files:
        final_additional_files.append(os.path.join(dirname, os.path.basename(f)))
        shutil.copyfile(f, final_additional_files[-1])
      additional_files = final_additional_files
    else:
      # copy whole directory, and use a specific main .cpp file
      # (rmtree() fails on Windows if the current working directory is inside the tree.)
      if os.getcwd().startswith(os.path.abspath(dirname)):
          os.chdir(os.path.join(dirname, '..'))
      shutil.rmtree(dirname)
      shutil.copytree(src, dirname)
      shutil.move(os.path.join(dirname, main_file), filename)
      # the additional files were copied; alter additional_files to point to their full paths now
      additional_files = map(lambda f: os.path.join(dirname, f), additional_files)
      os.chdir(self.get_dir())

    # C++ => LLVM binary

    for f in [filename] + additional_files:
      try:
        # Make sure we notice if compilation steps failed
        os.remove(f + '.o')
      except:
        pass
      compiler_flags = ['-emit-llvm']
      if not f.endswith('.c'):
         compiler_flags = compiler_flags + ['-std=c++03']
      args = [Building.COMPILER] + compiler_flags + COMPILER_OPTS + Building.COMPILER_TEST_OPTS + \
             ['-I', dirname, '-I', os.path.join(dirname, 'include')] + \
             map(lambda include: '-I' + include, includes) + \
             ['-c', f, '-o', f + '.o']
      output = Popen(args, stdout=PIPE, stderr=self.stderr_redirect).communicate()[0]
      assert os.path.exists(f + '.o'), 'Source compilation error: ' + output

    # Link all files
    if len(additional_files) + len(libraries) > 0:
      shutil.move(filename + '.o', filename + '.o.alone')
      Building.link([filename + '.o.alone'] + map(lambda f: f + '.o', additional_files) + libraries,
               filename + '.o')
      if not os.path.exists(filename + '.o'):
        print "Failed to link LLVM binaries:\n\n", output
        raise Exception("Linkage error");

    # Finalize
    self.prep_ll_run(filename, filename + '.o', build_ll_hook=build_ll_hook)

    # BC => JS
    self.ll_to_js(filename, extra_emscripten_args, post_build)

    if output_processor is not None:
      output_processor(open(filename + '.o.js').read())

  def run_generated_code(self, engine, filename, args=[], check_timeout=True, output_nicerizer=None):
    stdout = os.path.join(self.get_dir(), 'stdout') # use files, as PIPE can get too full and hang us
    stderr = os.path.join(self.get_dir(), 'stderr')
    try:
      cwd = os.getcwd()
    except:
      cwd = None
    os.chdir(self.get_dir())
    run_js(filename, engine, args, check_timeout, stdout=open(stdout, 'w'), stderr=open(stderr, 'w'))
    if cwd is not None:
      os.chdir(cwd)
    out = open(stdout, 'r').read()
    err = open(stderr, 'r').read()
    if engine == SPIDERMONKEY_ENGINE and Settings.ASM_JS:
      if 'Successfully compiled asm.js code' in err and 'asm.js link error' not in err:
        print >> sys.stderr, "[was asm.js'ified]"
      elif 'asm.js' in err: # if no asm.js error, then not an odin build
        raise Exception("did NOT asm.js'ify")
    if output_nicerizer:
      ret = output_nicerizer(out, err)
    else:
      ret = out + err
    assert 'strict warning:' not in ret, 'We should pass all strict mode checks: ' + ret
    return ret

  def build_native(self, filename, args=[]):
    compiler = CLANG if filename.endswith('cpp') else CLANG_CC
    process = Popen([compiler, '-O2', '-fno-math-errno', filename, '-o', filename+'.native'] + args, stdout=PIPE, stderr=self.stderr_redirect)
    output = process.communicate()
    if process.returncode is not 0:
      print >> sys.stderr, "Building native executable with command '%s' failed with a return code %d!" % (' '.join([CLANG, '-O2', filename, '-o', filename+'.native']), process.returncode)
      print "Output: " + output[0]

  def run_native(self, filename, args):
    process = Popen([filename+'.native'] + args, stdout=PIPE);
    output = process.communicate()
    if process.returncode is not 0:
      print >> sys.stderr, "Running native executable with command '%s' failed with a return code %d!" % (' '.join([filename+'.native'] + args), process.returncode)
      print "Output: " + output[0]
    return output[0]

  def assertIdentical(self, values, y):
    if type(values) not in [list, tuple]: values = [values]
    for x in values:
      if x == y: return # success
    raise Exception("Expected to have '%s' == '%s', diff:\n\n%s" % (
      limit_size(values[0]), limit_size(y),
      limit_size(''.join([a.rstrip()+'\n' for a in difflib.unified_diff(x.split('\n'), y.split('\n'), fromfile='expected', tofile='actual')]))
    ))

  def assertContained(self, values, string, additional_info=''):
    if type(values) not in [list, tuple]: values = [values]
    for value in values:
      if type(string) is not str: string = string()
      if value in string: return # success
    raise Exception("Expected to find '%s' in '%s', diff:\n\n%s\n%s" % (
      limit_size(values[0]), limit_size(string),
      limit_size(''.join([a.rstrip()+'\n' for a in difflib.unified_diff(values[0].split('\n'), string.split('\n'), fromfile='expected', tofile='actual')])),
      additional_info
    ))

  def assertNotContained(self, value, string):
    if type(value) is not str: value = value() # lazy loading
    if type(string) is not str: string = string()
    if value in string:
      raise Exception("Expected to NOT find '%s' in '%s', diff:\n\n%s" % (
        limit_size(value), limit_size(string),
        limit_size(''.join([a.rstrip()+'\n' for a in difflib.unified_diff(value.split('\n'), string.split('\n'), fromfile='expected', tofile='actual')]))
      ))

  library_cache = {}

  def get_build_dir(self):
    ret = os.path.join(self.get_dir(), 'building')
    if not os.path.exists(ret):
      os.makedirs(ret)
    return ret

  def get_library(self, name, generated_libs, configure=['sh', './configure'], configure_args=[], make=['make'], make_args=['-j', '2'], cache=True, env_init={}, cache_name_extra='', native=False):
    build_dir = self.get_build_dir()
    output_dir = self.get_dir()

    cache_name = name + cache_name_extra
    if self.library_cache is not None:
      if cache and self.library_cache.get(cache_name):
        print >> sys.stderr,  '<load %s from cache> ' % cache_name,
        generated_libs = []
        for basename, contents in self.library_cache[cache_name]:
          bc_file = os.path.join(build_dir, basename)
          f = open(bc_file, 'wb')
          f.write(contents)
          f.close()
          generated_libs.append(bc_file)
        return generated_libs

    print >> sys.stderr, '<building and saving %s into cache> ' % cache_name,

    return Building.build_library(name, build_dir, output_dir, generated_libs, configure, configure_args, make, make_args, self.library_cache, cache_name,
                                  copy_project=True, env_init=env_init, native=native)

  def clear(self, in_curr=False):
    for name in os.listdir(self.get_dir()):
      try_delete(os.path.join(self.get_dir(), name) if not in_curr else name)
    emcc_debug = os.environ.get('EMCC_DEBUG')
    if emcc_debug and not in_curr:
      for name in os.listdir(EMSCRIPTEN_TEMP_DIR):
        try_delete(os.path.join(EMSCRIPTEN_TEMP_DIR, name))

  # Shared test code between main suite and others

  def setup_runtimelink_test(self):
    header = r'''
      struct point
      {
        int x, y;
      };

    '''
    open(os.path.join(self.get_dir(), 'header.h'), 'w').write(header)

    supp = r'''
      #include <stdio.h>
      #include "header.h"

      extern void mainFunc(int x);
      extern int mainInt;

      void suppFunc(struct point &p) {
        printf("supp: %d,%d\n", p.x, p.y);
        mainFunc(p.x+p.y);
        printf("supp see: %d\n", mainInt);
      }

      int suppInt = 76;
    '''
    supp_name = os.path.join(self.get_dir(), 'supp.c')
    open(supp_name, 'w').write(supp)

    main = r'''
      #include <stdio.h>
      #include "header.h"

      extern void suppFunc(struct point &p);
      extern int suppInt;

      void mainFunc(int x) {
        printf("main: %d\n", x);
      }

      int mainInt = 543;

      int main( int argc, const char *argv[] ) {
        struct point p = { 54, 2 };
        suppFunc(p);
        printf("main see: %d\nok.\n", suppInt);
        #ifdef BROWSER
          int result = suppInt;
          REPORT_RESULT();
        #endif
        return 0;
      }
    '''

    return (main, supp)

###################################################################################################

sys.argv = map(lambda arg: arg if not arg.startswith('test_') else 'default.' + arg, sys.argv)

test_index = 0

if 'benchmark' not in str(sys.argv) and 'sanity' not in str(sys.argv) and 'browser' not in str(sys.argv):
  # Tests

  print "Running Emscripten tests..."

  if len(sys.argv) == 2 and 'ALL.' in sys.argv[1]:
    ignore, test = sys.argv[1].split('.')
    print 'Running all test modes on test "%s"' % test
    sys.argv = [sys.argv[0], 'default.'+test, 'o1.'+test, 'o2.'+test, 'asm2.'+test, 'asm2g.'+test, 's_0_0.'+test, 's_0_1.'+test, 's_1_0.'+test, 's_1_1.'+test]

  class T(RunnerCore): # Short name, to make it more fun to use manually on the commandline
    ## Does a complete test - builds, runs, checks output, etc.
    def do_run(self, src, expected_output, args=[], output_nicerizer=None, output_processor=None, no_build=False, main_file=None, additional_files=[], js_engines=None, post_build=None, basename='src.cpp', libraries=[], includes=[], force_c=False, build_ll_hook=None, extra_emscripten_args=[]):
      if force_c or (main_file is not None and main_file[-2:]) == '.c':
        basename = 'src.c'
        Building.COMPILER = to_cc(Building.COMPILER)

      dirname = self.get_dir()
      filename = os.path.join(dirname, basename)
      if not no_build:
        self.build(src, dirname, filename, main_file=main_file, additional_files=additional_files, libraries=libraries, includes=includes,
                   build_ll_hook=build_ll_hook, extra_emscripten_args=extra_emscripten_args, post_build=post_build)

      # Run in both JavaScript engines, if optimizing - significant differences there (typed arrays)
      if js_engines is None:
        js_engines = JS_ENGINES
      if Settings.USE_TYPED_ARRAYS:
        js_engines = filter(lambda engine: engine != V8_ENGINE, js_engines) # V8 issue 1822
      js_engines = filter(lambda engine: engine not in self.banned_js_engines, js_engines)
      if len(js_engines) == 0: return self.skip('No JS engine present to run this test with. Check %s and the paths therein.' % EM_CONFIG)
      for engine in js_engines:
        js_output = self.run_generated_code(engine, filename + '.o.js', args, output_nicerizer=output_nicerizer)
        self.assertContained(expected_output, js_output.replace('\r\n', '\n'))
        self.assertNotContained('ERROR', js_output)

      #shutil.rmtree(dirname) # TODO: leave no trace in memory. But for now nice for debugging

      if self.save_JS:
        global test_index
        self.hardcode_arguments(filename + '.o.js', args)
        shutil.copyfile(filename + '.o.js', os.path.join(TEMP_DIR, str(test_index) + '.js'))
        test_index += 1

    # No building - just process an existing .ll file (or .bc, which we turn into .ll)
    def do_ll_run(self, ll_file, expected_output=None, args=[], js_engines=None, output_nicerizer=None, post_build=None, force_recompile=False, build_ll_hook=None, extra_emscripten_args=[]):
      filename = os.path.join(self.get_dir(), 'src.cpp')

      self.prep_ll_run(filename, ll_file, force_recompile, build_ll_hook)

      self.ll_to_js(filename, extra_emscripten_args, post_build)

      self.do_run(None,
                   expected_output,
                   args,
                   no_build=True,
                   js_engines=js_engines,
                   output_nicerizer=output_nicerizer,
                   post_build=None) # post_build was already done in ll_to_js, this do_run call is just to test the output

    def test_hello_world(self):
        src = '''
          #include <stdio.h>
          int main()
          {
            printf("hello, world!\\n");
            return 0;
          }
        '''
        self.do_run(src, 'hello, world!')

        assert 'EMSCRIPTEN_GENERATED_FUNCTIONS' not in open(self.in_dir('src.cpp.o.js')).read(), 'must not emit this unneeded internal thing'

    def test_intvars(self):
        if self.emcc_args == None: return self.skip('needs ta2')

        src = '''
          #include <stdio.h>
          int global = 20;
          int *far;
          int main()
          {
            int x = 5;
            int y = x+17;
            int z = (y-1)/2; // Should stay an integer after division!
            y += 1;
            int w = x*3+4;
            int k = w < 15 ? 99 : 101;
            far = &k;
            *far += global;
            int i = k > 100; // Should be an int, not a bool!
            int j = i << 6;
            j >>= 1;
            j = j ^ 5;
            int h = 1;
            h |= 0;
            int p = h;
            p &= 0;
            printf("*%d,%d,%d,%d,%d,%d,%d,%d,%d*\\n", x, y, z, w, k, i, j, h, p);

            long hash = -1;
            size_t perturb;
            int ii = 0;
            for (perturb = hash; ; perturb >>= 5) {
              printf("%d:%d", ii, perturb);
              ii++;
              if (ii == 9) break;
              printf(",");
            }
            printf("*\\n");
            printf("*%.1d,%.2d*\\n", 56, 9);

            // Fixed-point math on 64-bit ints. Tricky to support since we have no 64-bit shifts in JS
            {
              struct Fixed {
                static int Mult(int a, int b) {
                  return ((long long)a * (long long)b) >> 16;
                }
              };
              printf("fixed:%d\\n", Fixed::Mult(150000, 140000));
            }

            printf("*%ld*%p\\n", (long)21, &hash); // The %p should not enter an infinite loop!
            return 0;
          }
        '''
        self.do_run(src, '*5,23,10,19,121,1,37,1,0*\n0:-1,1:134217727,2:4194303,3:131071,4:4095,5:127,6:3,7:0,8:0*\n*56,09*\nfixed:320434\n*21*')

    def test_sintvars(self):
        Settings.CORRECT_SIGNS = 1 # Relevant to this test
        src = '''
          #include <stdio.h>
          struct S {
            char *match_start;
            char *strstart;
          };
          int main()
          {
            struct S _s;
            struct S *s = &_s;
            unsigned short int sh;

            s->match_start = (char*)32522;
            s->strstart = (char*)(32780);
            printf("*%d,%d,%d*\\n", (int)s->strstart, (int)s->match_start, (int)(s->strstart - s->match_start));
            sh = s->strstart - s->match_start;
            printf("*%d,%d*\\n", sh, sh>>7);

            s->match_start = (char*)32999;
            s->strstart = (char*)(32780);
            printf("*%d,%d,%d*\\n", (int)s->strstart, (int)s->match_start, (int)(s->strstart - s->match_start));
            sh = s->strstart - s->match_start;
            printf("*%d,%d*\\n", sh, sh>>7);
          }
        '''
        output = '*32780,32522,258*\n*258,2*\n*32780,32999,-219*\n*65317,510*'
        Settings.CORRECT_OVERFLOWS = 0 # We should not need overflow correction to get this right
        self.do_run(src, output, force_c=True)

    def test_i64(self):
        if Settings.USE_TYPED_ARRAYS != 2: return self.skip('i64 mode 1 requires ta2')

        src = '''
          #include <stdio.h>
          int main()
          {
            long long a = 0x2b00505c10;
            long long b = a >> 29;
            long long c = a >> 32;
            long long d = a >> 34;
            printf("*%Ld,%Ld,%Ld,%Ld*\\n", a, b, c, d);
            unsigned long long ua = 0x2b00505c10;
            unsigned long long ub = ua >> 29;
            unsigned long long uc = ua >> 32;
            unsigned long long ud = ua >> 34;
            printf("*%Ld,%Ld,%Ld,%Ld*\\n", ua, ub, uc, ud);

            long long x = 0x0000def123450789ULL; // any bigger than this, and we
            long long y = 0x00020ef123456089ULL; // start to run into the double precision limit!
            printf("*%Ld,%Ld,%Ld,%Ld,%Ld*\\n", x, y, x | y, x & y, x ^ y, x >> 2, y << 2);

            printf("*");
            long long z = 13;
            int n = 0;
            while (z > 1) {
              printf("%.2f,", (float)z); // these must be integers!
              z = z >> 1;
              n++;
            }
            printf("*%d*\\n", n);
            return 0;
          }
        '''
        self.do_run(src, '*184688860176,344,43,10*\n*184688860176,344,43,10*\n*245127260211081,579378795077769,808077213656969,16428841631881,791648372025088*\n*13.00,6.00,3.00,*3*')

        src = r'''
          #include <time.h>
          #include <stdio.h>
          #include <stdint.h>

          int64_t returner1() { return 0x0000def123450789ULL; }
          int64_t returner2(int test) {
            while (test > 10) test /= 2; // confuse the compiler so it doesn't eliminate this function
            return test > 5 ? 0x0000def123450123ULL : 0ULL;
          }

          void modifier1(int64_t t) {
            t |= 12;
            printf("m1: %Ld\n", t);
          }
          void modifier2(int64_t &t) {
            t |= 12;
          }

          int truthy() {
            int x = time(0);
            while (x > 10) {
              x |= 7;
              x /= 2;
            }
            return x < 3;
          }

          struct IUB {
             int c;
             long long d;
          };

          IUB iub[] = {
             { 55, 17179869201 },
             { 122, 25769803837 },
          };

          int main(int argc, char **argv)
          {
            int64_t x1 = 0x1234def123450789ULL;
            int64_t x2 = 0x1234def123450788ULL;
            int64_t x3 = 0x1234def123450789ULL;
            printf("*%Ld\n%d,%d,%d,%d,%d\n%d,%d,%d,%d,%d*\n", x1, x1==x2, x1<x2, x1<=x2, x1>x2, x1>=x2, // note: some rounding in the printing!
                                                                  x1==x3, x1<x3, x1<=x3, x1>x3, x1>=x3);
            printf("*%Ld*\n", returner1());
            printf("*%Ld*\n", returner2(30));

            uint64_t maxx = -1ULL;
            printf("*%Lu*\n*%Lu*\n", maxx, maxx >> 5);

            // Make sure params are not modified if they shouldn't be
            int64_t t = 123;
            modifier1(t);
            printf("*%Ld*\n", t);
            modifier2(t);
            printf("*%Ld*\n", t);

            // global structs with i64s
            printf("*%d,%Ld*\n*%d,%Ld*\n", iub[0].c, iub[0].d, iub[1].c, iub[1].d);

            // Bitshifts
            {
              int64_t a = -1;
              int64_t b = a >> 29;
              int64_t c = a >> 32;
              int64_t d = a >> 34;
              printf("*%Ld,%Ld,%Ld,%Ld*\n", a, b, c, d);
              uint64_t ua = -1;
              int64_t ub = ua >> 29;
              int64_t uc = ua >> 32;
              int64_t ud = ua >> 34;
              printf("*%Ld,%Ld,%Ld,%Ld*\n", ua, ub, uc, ud);
            }

            // Nonconstant bitshifts
            {
              int64_t a = -1;
              int64_t b = a >> (29 - argc + 1);
              int64_t c = a >> (32 - argc + 1);
              int64_t d = a >> (34 - argc + 1);
              printf("*%Ld,%Ld,%Ld,%Ld*\n", a, b, c, d);
              uint64_t ua = -1;
              int64_t ub = ua >> (29 - argc + 1);
              int64_t uc = ua >> (32 - argc + 1);
              int64_t ud = ua >> (34 - argc + 1);
              printf("*%Ld,%Ld,%Ld,%Ld*\n", ua, ub, uc, ud);
            }

            // Math mixtures with doubles
            {
              uint64_t a = 5;
              double b = 6.8;
              uint64_t c = a * b;
              printf("*prod:%llu*\n*%d,%d,%d*\n", c, (int)&a, (int)&b, (int)&c); // printing addresses prevents optimizations
            }

            // Basic (rounded, for now) math. Just check compilation.
            int64_t a = 0x1234def123450789ULL;
            a--; if (truthy()) a--; // confuse optimizer
            int64_t b = 0x1234000000450789ULL;
            b++; if (truthy()) b--; // confuse optimizer
            printf("*%Ld,%Ld,%Ld,%Ld*\n",   (a+b)/5000, (a-b)/5000, (a*3)/5000, (a/5)/5000);

            return 0;
          }
        '''
        self.do_run(src, '*1311918518731868041\n' +
                         '0,0,0,1,1\n' +
                         '1,0,1,0,1*\n' +
                         '*245127260211081*\n' +
                         '*245127260209443*\n' +
                         '*18446744073709551615*\n' +
                         '*576460752303423487*\n' +
                         'm1: 127\n' +
                         '*123*\n' +
                         '*127*\n' +
                         '*55,17179869201*\n' +
                         '*122,25769803837*\n' +
                         '*-1,-1,-1,-1*\n' +
                         '*-1,34359738367,4294967295,1073741823*\n' +
                         '*-1,-1,-1,-1*\n' +
                         '*-1,34359738367,4294967295,1073741823*\n' +
                         '*prod:34*')

        src = r'''
          #include <stdio.h>
          #include <limits>

          int main()
          {
              long long i,j,k;

              i = 0;
              j = -1,
              k = 1;

              printf( "*\n" );
              printf( "%s\n", i > j ? "Ok": "Fail" );
              printf( "%s\n", k > i ? "Ok": "Fail" );
              printf( "%s\n", k > j ? "Ok": "Fail" );
              printf( "%s\n", i < j ? "Fail": "Ok" );
              printf( "%s\n", k < i ? "Fail": "Ok" );
              printf( "%s\n", k < j ? "Fail": "Ok" );
              printf( "%s\n", (i-j) >= k ? "Ok": "Fail" );
              printf( "%s\n", (i-j) <= k ? "Ok": "Fail" );
              printf( "%s\n", i > std::numeric_limits<long long>::min() ? "Ok": "Fail" );
              printf( "%s\n", i < std::numeric_limits<long long>::max() ? "Ok": "Fail" );
              printf( "*\n" );
          }
        '''

        self.do_run(src, '*\nOk\nOk\nOk\nOk\nOk\nOk\nOk\nOk\nOk\nOk\n*')

        # stuff that also needs sign corrections

        Settings.CORRECT_SIGNS = 1

        src = r'''
          #include <stdio.h>
          #include <stdint.h>

          int main()
          {
            // i32 vs i64
            int32_t small = -1;
            int64_t large = -1;
            printf("*%d*\n", small == large);
            small++;
            printf("*%d*\n", small == large);
            uint32_t usmall = -1;
            uint64_t ularge = -1;
            printf("*%d*\n", usmall == ularge);
            return 0;
          }
        '''

        self.do_run(src, '*1*\n*0*\n*0*\n')

    def test_i64_b(self):
        if Settings.USE_TYPED_ARRAYS != 2: return self.skip('full i64 stuff only in ta2')

        src = r'''
          #include <stdio.h>
          #include <sys/time.h>

          typedef long long int64;

          #define PRMJ_USEC_PER_SEC       1000000L

          int main(int argc, char * argv[]) {
              int64 sec = 1329409675 + argc;
              int64 usec = 2329509675;
              int64 mul = int64(sec) * PRMJ_USEC_PER_SEC;
              int64 add = mul + int64(usec);
              int add_low = add;
              int add_high = add >> 32;
              printf("*%lld,%lld,%u,%u*\n", mul, add, add_low, add_high);
              int64 x = sec + (usec << 25);
              x >>= argc*3;
              printf("*%llu*\n", x);
              return 0;
          }
        '''

        self.do_run(src, '*1329409676000000,1329412005509675,3663280683,309527*\n*9770671914067409*\n')

    def test_i64_cmp(self):
        if Settings.USE_TYPED_ARRAYS != 2: return self.skip('full i64 stuff only in ta2')

        src = r'''
          #include <stdio.h>

          typedef long long int64;

          bool compare(int64 val) {
            return val == -12;
          }

          bool compare2(int64 val) {
            return val < -12;
          }

          int main(int argc, char * argv[]) {
              printf("*%d,%d,%d,%d,%d,%d*\n", argc, compare(argc-1-12), compare(1000+argc), compare2(argc-1-10), compare2(argc-1-14), compare2(argc+1000));
              return 0;
          }
        '''

        self.do_run(src, '*1,1,0,0,1,0*\n')

    def test_i64_cmp2(self):
        if Settings.USE_TYPED_ARRAYS != 2: return self.skip('full i64 stuff only in ta2')

        src = r'''
          #include <inttypes.h>
          #include <stdio.h>

          typedef int32_t INT32;
          typedef int64_t INT64;
          typedef uint8_t UINT8;

          void interface_clock_changed()
          {
	          UINT8 m_divshift;
	          INT32 m_divisor;

	          //INT64 attos = m_attoseconds_per_cycle;
	          INT64 attos = 279365114840;
	          m_divshift = 0;
	          while (attos >= (1UL << 31))
	          {
		          m_divshift++;
		          printf("m_divshift is %i, on %Ld >?= %lu\n", m_divshift, attos, 1UL << 31);
		          attos >>= 1;
	          }
	          m_divisor = attos;

	          printf("m_divisor is %i\n",m_divisor);
          }

          int main() {
	          interface_clock_changed();
	          return 0;
          }
        '''
        self.do_run(src, '''m_divshift is 1, on 279365114840 >?= 2147483648
m_divshift is 2, on 139682557420 >?= 2147483648
m_divshift is 3, on 69841278710 >?= 2147483648
m_divshift is 4, on 34920639355 >?= 2147483648
m_divshift is 5, on 17460319677 >?= 2147483648
m_divshift is 6, on 8730159838 >?= 2147483648
m_divshift is 7, on 4365079919 >?= 2147483648
m_divshift is 8, on 2182539959 >?= 2147483648
m_divisor is 1091269979
''')

    def test_i64_double(self):
        if Settings.USE_TYPED_ARRAYS != 2: return self.skip('full i64 stuff only in ta2')


        src = r'''
          #include <stdio.h>

          typedef long long int64;
          #define JSDOUBLE_HI32_SIGNBIT   0x80000000

          bool JSDOUBLE_IS_NEGZERO(double d)
          {
            union {
              struct {
                unsigned int lo, hi;
              } s;
              double d;
            } x;
            if (d != 0)
              return false;
            x.d = d;
            return (x.s.hi & JSDOUBLE_HI32_SIGNBIT) != 0;
          }

          bool JSINT64_IS_NEGZERO(int64 l)
          {
            union {
              int64 i;
              double d;
            } x;
            if (l != 0)
              return false;
            x.i = l;
            return x.d == -0;
          }

          int main(int argc, char * argv[]) {
            printf("*%d,%d,%d,%d*\n", JSDOUBLE_IS_NEGZERO(0), JSDOUBLE_IS_NEGZERO(-0), JSDOUBLE_IS_NEGZERO(-1), JSDOUBLE_IS_NEGZERO(+1));
            printf("*%d,%d,%d,%d*\n", JSINT64_IS_NEGZERO(0), JSINT64_IS_NEGZERO(-0), JSINT64_IS_NEGZERO(-1), JSINT64_IS_NEGZERO(+1));
            return 0;
          }
        '''
        self.do_run(src, '*0,0,0,0*\n*1,1,0,0*\n') # same as gcc

    def test_i64_umul(self):
        if Settings.USE_TYPED_ARRAYS != 2: return self.skip('full i64 stuff only in ta2')

        src = r'''
          #include <inttypes.h>
          #include <stdio.h>

          typedef uint32_t UINT32;
          typedef uint64_t UINT64;

          int main() {
          volatile UINT32 testu32a = 2375724032U;
          UINT32 bigu32 = 0xffffffffU;
          volatile UINT64 testu64a = 14746250828952703000U;

          while ((UINT64)testu32a * (UINT64)bigu32 < testu64a) {
	          printf("testu64a is %llu\n", testu64a);
	          testu64a /= 2;
          }

          return 0;
          }
        '''
        self.do_run(src, 'testu64a is 14746250828952703000\n')

    def test_i64_precise(self):
        if Settings.USE_TYPED_ARRAYS != 2: return self.skip('full i64 stuff only in ta2')

        src = r'''
          #include <inttypes.h>
          #include <stdio.h>

          int main() {
            uint64_t x = 0, y = 0;
            for (int i = 0; i < 64; i++) {
              x += 1ULL << i;
              y += x;
              x /= 3;
              y *= 5;
              printf("unsigned %d: %llu,%llu,%llu,%llu,%llu,%llu,%llu,%llu,%llu\n", i, x, y, x+y, x-y, x*y, y ? x/y : 0, x ? y/x : 0, y ? x%y : 0, x ? y%x : 0);
            }
            int64_t x2 = 0, y2 = 0;
            for (int i = 0; i < 64; i++) {
              x2 += 1LL << i;
              y2 += x2;
              x2 /= 3 * (i % 7 ? -1 : 1);
              y2 *= 5 * (i % 2 ? -1 : 1);
              printf("signed %d: %lld,%lld,%lld,%lld,%lld,%lld,%lld,%lld,%lld\n", i, x2, y2, x2+y2, x2-y2, x2*y2, y2 ? x2/y2 : 0, x2 ? y2/x2 : 0, y2 ? x2%y2 : 0, x2 ? y2%x2 : 0);
            }
            return 0;
          }
        '''
        self.do_run(src, open(path_from_root('tests', 'i64_precise.txt')).read())

        # Verify that even if we ask for precision, if it is not needed it is not included
        Settings.PRECISE_I64_MATH = 1
        src = '''
          #include <inttypes.h>
          #include <stdio.h>

          int main(int argc, char **argv) {
            uint64_t x = 2125299906845564, y = 1225891506842664;
            if (argc == 12) {
              x = x >> 1;
              y = y >> 1;
            }
            x = x & 12ULL;
            y = y | 12ULL;
            x = x ^ y;
            x <<= 2;
            y >>= 3;
            printf("*%llu, %llu*\\n", x, y);
          }
        '''
        self.do_run(src, '*4903566027370624, 153236438355333*')
        code = open(os.path.join(self.get_dir(), 'src.cpp.o.js')).read()
        assert 'goog.math.Long' not in code, 'i64 precise math should not have been included if not actually used'

        # But if we force it to be included, it is. First, a case where we don't need it
        Settings.PRECISE_I64_MATH = 2
        self.do_run(open(path_from_root('tests', 'hello_world.c')).read(), 'hello')
        code = open(os.path.join(self.get_dir(), 'src.cpp.o.js')).read()
        assert 'goog.math.Long' in code, 'i64 precise math should be included if forced'

        # and now one where we do
        self.do_run(r'''
          #include <stdio.h>

          int main( int argc, char ** argv )
          {
              unsigned long a = 0x60DD1695U;
              unsigned long b = 0xCA8C4E7BU;
              unsigned long long c = (unsigned long long)a * b;
              printf( "c = %016llx\n", c );

              return 0;
          }
        ''', 'c = 4ca38a6bd2973f97')

    def test_i64_llabs(self):
      if Settings.USE_TYPED_ARRAYS != 2: return self.skip('full i64 stuff only in ta2')
      Settings.PRECISE_I64_MATH = 2
      self.do_run(r'''
        #include <stdio.h>
        #include <stdlib.h>

        int main(int argc, char ** argv) {
          printf("%lld,%lld\n", llabs(-576460752303423489), llabs(576460752303423489));
          return 0;
        }
      ''', '576460752303423489,576460752303423489')

    def test_i64_zextneg(self):
      if Settings.USE_TYPED_ARRAYS != 2: return self.skip('full i64 stuff only in ta2')

      src = r'''
        #include <stdint.h>
        #include <stdio.h>

        int main(int argc, char *argv[])
        {
            uint8_t byte = 0x80;
            uint16_t two = byte;
            uint32_t four = byte;
            uint64_t eight = byte;

            printf("value: %d,%d,%d,%lld.\n", byte, two, four, eight);

            return 0;
        }
      '''
      self.do_run(src, 'value: 128,128,128,128.')

    def test_i64_7z(self):
      if Settings.USE_TYPED_ARRAYS != 2: return self.skip('full i64 stuff only in ta2')

      src = r'''
        #include <stdint.h>
        #include <stdio.h>
        uint64_t a, b;
        int main(int argc, char *argv[])
        {
            a = argc;
            b = argv[1][0];
            if (a > a + b || a > a + b + 1) {
                printf("one %lld, %lld", a, b);
                return 0;
            }
            printf("zero %lld, %lld", a, b);
            return 0;
        }
      '''
      self.do_run(src, 'zero 2, 104', ['hallo'])

    def test_i64_i16(self):
      if Settings.USE_TYPED_ARRAYS != 2: return self.skip('full i64 stuff only in ta2')

      src = r'''
        #include <stdio.h>
        int main(int argc, char ** argv){
            int y=-133;
            __int64_t x= ((__int64_t)((short)(y)))*(100 + argc);
            if(x>0)
                printf(">0\n");
            else
                printf("<=0\n");
        }
      '''
      self.do_run(src, '<=0')

    def test_i64_qdouble(self):
      if Settings.USE_TYPED_ARRAYS != 2: return self.skip('full i64 stuff only in ta2')

      src = r'''
        #include <stdio.h>
        typedef long long qint64; /* 64 bit signed */
        typedef double qreal;


        int main(int argc, char **argv)
        {
          qreal c = 111;
          qint64 d = -111 + (argc - 1);
          c += d;
          if (c < -1 || c > 1)
          {
                  printf("Failed!\n");
          }
          else
          {
                  printf("Succeeded!\n");
          }
        };
      '''
      self.do_run(src, 'Succeeded!')

    def test_i32_mul_precise(self):
      if self.emcc_args == None: return self.skip('needs ta2')

      src = r'''
        #include <stdio.h>

        int main(int argc, char **argv) {
          unsigned long d1 = 0x847c9b5d;
          unsigned long q =  0x549530e1;
          if (argc > 1000) { q += argc; d1 -= argc; } // confuse optimizer
          printf("%lu\n", d1*q);
          return 0;
        }
      '''
      self.do_run(src, '3217489085')

    def test_i32_mul_semiprecise(self):
      if Settings.ASM_JS: return self.skip('asm is always fully precise')

      Settings.PRECISE_I32_MUL = 0 # we want semiprecise here

      src = r'''
        #include <stdio.h>

        typedef unsigned int uint;

        // from cube2, zlib licensed

        #define N (624)             
        #define M (397)                
        #define K (0x9908B0DFU)       

        static uint state[N];
        static int next = N;

        void seedMT(uint seed)
        {
            state[0] = seed;
            for(uint i = 1; i < N; i++) // if we do not do this precisely, at least we should coerce to int immediately, not wait
                state[i] = seed = 1812433253U * (seed ^ (seed >> 30)) + i;
            next = 0;
        }

        int main() {
          seedMT(5497);
          for (int i = 0; i < 10; i++) printf("%d: %u\n", i, state[i]);
          return 0;
        }
      '''
      self.do_run(src, '''0: 5497
1: 2916432318
2: 2502517762
3: 3151524867
4: 2323729668
5: 2053478917
6: 2409490438
7: 848473607
8: 691103752
9: 3915535113
''')

    def test_i16_emcc_intrinsic(self):
      Settings.CORRECT_SIGNS = 1 # Relevant to this test

      src = r'''
        #include <stdio.h>

        int test(unsigned short a, unsigned short b) {
            unsigned short result = a;
            result += b;
            if (result < b) printf("C!");
            return result;
        }

        int main(void) {
            printf(",%d,", test(0, 0));
            printf(",%d,", test(1, 1));
            printf(",%d,", test(65535, 1));
            printf(",%d,", test(1, 65535));
            printf(",%d,", test(32768, 32767));
            printf(",%d,", test(32768, 32768));
            return 0;
        }
      '''
      self.do_run(src, ',0,,2,C!,0,C!,0,,65535,C!,0,')

    def test_negative_zero(self):
      src = r'''
        #include <stdio.h>
        #include <math.h>

        int main() {
          #define TEST(x, y) \
            printf("%.2f, %.2f ==> %.2f\n", x, y, copysign(x, y));
          TEST( 5.0f,  5.0f);
          TEST( 5.0f, -5.0f);
          TEST(-5.0f,  5.0f);
          TEST(-5.0f, -5.0f);
          TEST( 5.0f,  4.0f);
          TEST( 5.0f, -4.0f);
          TEST(-5.0f,  4.0f);
          TEST(-5.0f, -4.0f);
          TEST( 0.0f,  5.0f);
          TEST( 0.0f, -5.0f);
          TEST(-0.0f,  5.0f);
          TEST(-0.0f, -5.0f);
          TEST( 5.0f,  0.0f);
          TEST( 5.0f, -0.0f);
          TEST(-5.0f,  0.0f);
          TEST(-5.0f, -0.0f);
          TEST( 0.0f,  0.0f);
          TEST( 0.0f, -0.0f);
          TEST(-0.0f,  0.0f);
          TEST(-0.0f, -0.0f);
          return 0;
        }
      '''
      self.do_run(src, '''5.00, 5.00 ==> 5.00
5.00, -5.00 ==> -5.00
-5.00, 5.00 ==> 5.00
-5.00, -5.00 ==> -5.00
5.00, 4.00 ==> 5.00
5.00, -4.00 ==> -5.00
-5.00, 4.00 ==> 5.00
-5.00, -4.00 ==> -5.00
0.00, 5.00 ==> 0.00
0.00, -5.00 ==> -0.00
-0.00, 5.00 ==> 0.00
-0.00, -5.00 ==> -0.00
5.00, 0.00 ==> 5.00
5.00, -0.00 ==> -5.00
-5.00, 0.00 ==> 5.00
-5.00, -0.00 ==> -5.00
0.00, 0.00 ==> 0.00
0.00, -0.00 ==> -0.00
-0.00, 0.00 ==> 0.00
-0.00, -0.00 ==> -0.00
''')

    def test_llvm_intrinsics(self):
      if self.emcc_args == None: return self.skip('needs ta2')

      Settings.PRECISE_I64_MATH = 2 # for bswap64

      src = r'''
        #include <stdio.h>
        #include <sys/types.h>

        extern "C" {
          extern unsigned short llvm_bswap_i16(unsigned short x);
          extern unsigned int llvm_bswap_i32(unsigned int x);
          extern int32_t llvm_ctlz_i32(int32_t x);
          extern int64_t llvm_ctlz_i64(int64_t x);
          extern int32_t llvm_cttz_i32(int32_t x);
          extern int64_t llvm_cttz_i64(int64_t x);
          extern int32_t llvm_ctpop_i32(int32_t x);
          extern int64_t llvm_ctpop_i64(int64_t x);
          extern int llvm_expect_i32(int x, int y);
        }

        int main(void) {
            unsigned short x = 0xc8ef;
            printf("%x,%x\n", x&0xff, x >> 8);
            x = llvm_bswap_i16(x);
            printf("%x,%x\n", x&0xff, x >> 8);

            unsigned int y = 0xc5de158a;
            printf("%x,%x,%x,%x\n", y&0xff, (y>>8)&0xff, (y>>16)&0xff, (y>>24)&0xff);
            y = llvm_bswap_i32(y);
            printf("%x,%x,%x,%x\n", y&0xff, (y>>8)&0xff, (y>>16)&0xff, (y>>24)&0xff);

            printf("%d,%d\n", (int)llvm_ctlz_i64(((int64_t)1) << 40), llvm_ctlz_i32(1<<10));
            printf("%d,%d\n", (int)llvm_cttz_i64(((int64_t)1) << 40), llvm_cttz_i32(1<<10));
            printf("%d,%d\n", (int)llvm_ctpop_i64((0x3101ULL << 32) | 1), llvm_ctpop_i32(0x3101));
            printf("%d\n", (int)llvm_ctpop_i32(-594093059));

            printf("%d\n", llvm_expect_i32(x % 27, 3));

            int64_t a = 1;
            a = __builtin_bswap64(a);
            printf("%lld\n", a);

            return 0;
        }
      '''
      self.do_run(src, '''ef,c8
c8,ef
8a,15,de,c5
c5,de,15,8a
23,21
40,10
5,4
22
13
72057594037927936
''')

    def test_bswap64(self):
      if Settings.USE_TYPED_ARRAYS != 2: return self.skip('needs ta2')

      src = r'''
        #include <stdio.h>
        #include <stdlib.h>

        #include <iostream>
        #include <string>
        #include <sstream>

        typedef unsigned long long quint64;   

        using namespace std;

        inline quint64 qbswap(quint64 source)
        {
            return 0
                | ((source & quint64(0x00000000000000ffLL)) << 56)
                | ((source & quint64(0x000000000000ff00LL)) << 40)
                | ((source & quint64(0x0000000000ff0000LL)) << 24)
                | ((source & quint64(0x00000000ff000000LL)) << 8)
                | ((source & quint64(0x000000ff00000000LL)) >> 8)
                | ((source & quint64(0x0000ff0000000000LL)) >> 24)
                | ((source & quint64(0x00ff000000000000LL)) >> 40)
                | ((source & quint64(0xff00000000000000LL)) >> 56);
        }

        int main()
        {
          quint64 v = strtoull("4433ffeeddccbb00", NULL, 16);
          printf("%lld\n", v);

	        const string string64bitInt = "4433ffeeddccbb00";
	        stringstream s(string64bitInt);
	        quint64 int64bitInt = 0;
          printf("1\n");
	        s >> hex >> int64bitInt;
          printf("2\n");
	
	        stringstream out;
	        out << hex << qbswap(int64bitInt);
	
	        cout << out.str() << endl;
	        cout << hex << int64bitInt << endl;
	        cout << string64bitInt << endl;
	
	        if (out.str() != "bbccddeeff3344")
	        {
		        cout << "Failed!" << endl;
	        }
	        else
	        {
		        cout << "Succeeded!" << endl;
	        }

          return 0;
        }
        '''
      self.do_run(src, '''4914553019779824384
1
2
bbccddeeff3344
4433ffeeddccbb00
4433ffeeddccbb00
Succeeded!
''')

    def test_sha1(self):
      if self.emcc_args == None: return self.skip('needs ta2')

      self.do_run(open(path_from_root('tests', 'sha1.c')).read(), 'SHA1=15dd99a1991e0b3826fede3deffc1feba42278e6')

    def test_cube2md5(self):
      if self.emcc_args == None: return self.skip('needs emcc')
      self.emcc_args += ['--embed-file', 'cube2md5.txt']
      shutil.copyfile(path_from_root('tests', 'cube2md5.txt'), os.path.join(self.get_dir(), 'cube2md5.txt'))
      self.do_run(open(path_from_root('tests', 'cube2md5.cpp')).read(), open(path_from_root('tests', 'cube2md5.ok')).read())

    def test_cube2hash(self):

      try:
        old_chunk_size = os.environ.get('EMSCRIPT_MAX_CHUNK_SIZE') or ''
        os.environ['EMSCRIPT_MAX_CHUNK_SIZE'] = '1' # test splitting out each function to a chunk in emscripten.py (21 functions here)

        # A good test of i64 math
        if Settings.USE_TYPED_ARRAYS != 2: return self.skip('requires ta2 C-style memory aliasing')
        self.do_run('', 'Usage: hashstring <seed>',
                    libraries=self.get_library('cube2hash', ['cube2hash.bc'], configure=None),  
                    includes=[path_from_root('tests', 'cube2hash')])

        for text, output in [('fleefl', '892BDB6FD3F62E863D63DA55851700FDE3ACF30204798CE9'),
                             ('fleefl2', 'AA2CC5F96FC9D540CA24FDAF1F71E2942753DB83E8A81B61'),
                             ('64bitisslow', '64D8470573635EC354FEE7B7F87C566FCAF1EFB491041670')]:
          self.do_run('', 'hash value: ' + output, [text], no_build=True)
      finally:
        os.environ['EMSCRIPT_MAX_CHUNK_SIZE'] = old_chunk_size

    def test_unaligned(self):
        if Settings.QUANTUM_SIZE == 1: return self.skip('No meaning to unaligned addresses in q1')

        src = r'''
          #include<stdio.h>

          struct S {
            double x;
            int y;
          };

          int main() {
            // the 64-bit value here will not be 8-byte aligned
            S s0[3] = { {0x12a751f430142, 22}, {0x17a5c85bad144, 98}, {1, 1}};
            char buffer[10*sizeof(S)];
            int b = int(buffer);
            S *s = (S*)(b + 4-b%8);
            s[0] = s0[0];
            s[1] = s0[1];
            s[2] = s0[2];

            printf("*%d : %d : %d\n", sizeof(S), ((unsigned int)&s[0]) % 8 != ((unsigned int)&s[1]) % 8,
                                                 ((unsigned int)&s[1]) - ((unsigned int)&s[0]));
            s[0].x++;
            s[0].y++;
            s[1].x++;
            s[1].y++;
            printf("%.1f,%d,%.1f,%d\n", s[0].x, s[0].y, s[1].x, s[1].y);
            return 0;
          }
          '''

        # TODO: A version of this with int64s as well
        self.do_run(src, '*12 : 1 : 12\n328157500735811.0,23,416012775903557.0,99\n')

        return # TODO: continue to the next part here

        # Test for undefined behavior in C. This is not legitimate code, but does exist

        if Settings.USE_TYPED_ARRAYS != 2: return self.skip('No meaning to unaligned addresses without t2')

        src = r'''
          #include <stdio.h>

          int main()
          {
            int x[10];
            char *p = (char*)&x[0];
            p++;
            short *q = (short*)p;
            *q = 300;
            printf("*%d:%d*\n", *q, ((int)q)%2);
            int *r = (int*)p;
            *r = 515559;
            printf("*%d*\n", *r);
            long long *t = (long long*)p;
            *t = 42949672960;
            printf("*%Ld*\n", *t);
            return 0;
          }
        '''

        try:
          self.do_run(src, '*300:1*\n*515559*\n*42949672960*\n')
        except Exception, e:
          assert 'must be aligned' in str(e), e # expected to fail without emulation

    def test_unsigned(self):
        Settings.CORRECT_SIGNS = 1 # We test for exactly this sort of thing here
        Settings.CHECK_SIGNS = 0
        src = '''
          #include <stdio.h>
          const signed char cvals[2] = { -1, -2 }; // compiler can store this is a string, so -1 becomes \FF, and needs re-signing
          int main()
          {
            {
              unsigned char x = 200;
              printf("*%d*\\n", x);
              unsigned char y = -22;
              printf("*%d*\\n", y);
            }

            int varey = 100;
            unsigned int MAXEY = -1, MAXEY2 = -77;
            printf("*%u,%d,%u*\\n", MAXEY, varey >= MAXEY, MAXEY2); // 100 >= -1? not in unsigned!

            int y = cvals[0];
            printf("*%d,%d,%d,%d*\\n", cvals[0], cvals[0] < 0, y, y < 0);
            y = cvals[1];
            printf("*%d,%d,%d,%d*\\n", cvals[1], cvals[1] < 0, y, y < 0);

            // zext issue - see mathop in jsifier
            unsigned char x8 = -10;
            unsigned long hold = 0;
            hold += x8;
            int y32 = hold+50;
            printf("*%u,%u*\\n", hold, y32);

            // Comparisons
            x8 = 0;
            for (int i = 0; i < 254; i++) x8++; // make it an actual 254 in JS - not a -2
            printf("*%d,%d*\\n", x8+1 == 0xff, x8+1 != 0xff); // 0xff may be '-1' in the bitcode

            return 0;
          }
        '''
        self.do_run(src, '*4294967295,0,4294967219*\n*-1,1,-1,1*\n*-2,1,-2,1*\n*246,296*\n*1,0*')

        # Now let's see some code that should just work in USE_TYPED_ARRAYS == 2, but requires
        # corrections otherwise
        if Settings.USE_TYPED_ARRAYS == 2:
          Settings.CORRECT_SIGNS = 0
          Settings.CHECK_SIGNS = 1 if not Settings.ASM_JS else 0
        else:
          Settings.CORRECT_SIGNS = 1
          Settings.CHECK_SIGNS = 0

        src = '''
          #include <stdio.h>
          int main()
          {
            {
              unsigned char x;
              unsigned char *y = &x;
              *y = -1;
              printf("*%d*\\n", x);
            }
            {
              unsigned short x;
              unsigned short *y = &x;
              *y = -1;
              printf("*%d*\\n", x);
            }
            /*{ // This case is not checked. The hint for unsignedness is just the %u in printf, and we do not analyze that
              unsigned int x;
              unsigned int *y = &x;
              *y = -1;
              printf("*%u*\\n", x);
            }*/
            {
              char x;
              char *y = &x;
              *y = 255;
              printf("*%d*\\n", x);
            }
            {
              char x;
              char *y = &x;
              *y = 65535;
              printf("*%d*\\n", x);
            }
            {
              char x;
              char *y = &x;
              *y = 0xffffffff;
              printf("*%d*\\n", x);
            }
            return 0;
          }
        '''
        self.do_run(src, '*255*\n*65535*\n*-1*\n*-1*\n*-1*')

    def test_bitfields(self):
        if self.emcc_args is None: Settings.SAFE_HEAP = 0 # bitfields do loads on invalid areas, by design
        src = '''
          #include <stdio.h>
          struct bitty {
            unsigned x : 1;
            unsigned y : 1;
            unsigned z : 1;
          };
          int main()
          {
            bitty b;
            printf("*");
            for (int i = 0; i <= 1; i++)
              for (int j = 0; j <= 1; j++)
                for (int k = 0; k <= 1; k++) {
                  b.x = i;
                  b.y = j;
                  b.z = k;
                  printf("%d,%d,%d,", b.x, b.y, b.z);
                }
            printf("*\\n");
            return 0;
          }
        '''
        self.do_run(src, '*0,0,0,0,0,1,0,1,0,0,1,1,1,0,0,1,0,1,1,1,0,1,1,1,*')

    def test_floatvars(self):
        src = '''
          #include <stdio.h>
          #include <math.h>
          int main(int argc, char **argv)
          {
            float x = 1.234, y = 3.5, q = 0.00000001;
            y *= 3;
            int z = x < y;
            printf("*%d,%d,%.1f,%d,%.4f,%.2f*\\n", z, int(y), y, (int)x, x, q);

            printf("%.2f, %.2f, %.2f, %.2f\\n", fmin(0.5, 3.3), fmin(NAN, 3.3), fmax(0.5, 3.3), fmax(NAN, 3.3));

            printf("small: %.10f\\n", argc * 0.000001);

            /*
            // Rounding behavior
            float fs[6] = { -2.75, -2.50, -2.25, 2.25, 2.50, 2.75 };
            double ds[6] = { -2.75, -2.50, -2.25, 2.25, 2.50, 2.75 };
            for (int i = 0; i < 6; i++)
              printf("*int(%.2f)=%d,%d*\\n", fs[i], int(fs[i]), int(ds[i]));
            */

            return 0;
          }
        '''
        self.do_run(src, '*1,10,10.5,1,1.2340,0.00*\n0.50, 3.30, 3.30, 3.30\nsmall: 0.0000010000\n')

    def test_isnan(self):
      src = r'''
        #include <stdio.h>

        int IsNaN(double x){
          int rc;   /* The value return */
          volatile double y = x;
          volatile double z = y;
          rc = (y!=z);
          return rc;
        }

        int main() {
          double tests[] = { 1.0, 3.333, 1.0/0.0, 0.0/0.0, -1.0/0.0, -0, 0, -123123123, 12.0E200 };
          for (int i = 0; i < sizeof(tests)/sizeof(double); i++)
            printf("%d - %f - %d\n", i, tests[i], IsNaN(tests[i]));
        }
        '''
      self.do_run(src, '''0 - 1.000000 - 0
1 - 3.333000 - 0
2 - inf - 0
3 - nan - 1
4 - -inf - 0
5 - 0.000000 - 0
6 - 0.000000 - 0
7 - -123123123.000000 - 0
8 - 1.2e+201 - 0
''')

    def test_globaldoubles(self):
        src = r'''
          #include <stdlib.h>
          #include <stdio.h>

          double      testVu,    testVv,    testWu,    testWv;

          void Test(double _testVu, double _testVv, double _testWu, double _testWv)
          {
              testVu = _testVu;
              testVv = _testVv;
              testWu = _testWu;
              testWv = _testWv;
              printf("BUG?\n");
              printf("Display: Vu=%f  Vv=%f  Wu=%f  Wv=%f\n", testVu, testVv, testWu, testWv);
          }

          int main(void)
          {
              double v1 = 465.1;
              double v2 = 465.2;
              double v3 = 160.3;
              double v4 = 111.4;
              Test(v1, v2, v3, v4);
              return 0;
          }
        '''
        self.do_run(src, 'BUG?\nDisplay: Vu=465.100000  Vv=465.200000  Wu=160.300000  Wv=111.400000')

    def test_math(self):
        src = '''
          #include <stdio.h>
          #include <stdlib.h>
          #include <cmath>
          int main()
          {
            printf("*%.2f,%.2f,%d", M_PI, -M_PI, (1/0.0) > 1e300); // could end up as infinity, or just a very very big number
            printf(",%d", finite(NAN) != 0);
            printf(",%d", finite(INFINITY) != 0);
            printf(",%d", finite(-INFINITY) != 0);
            printf(",%d", finite(12.3) != 0);
            printf(",%d", isinf(NAN) != 0);
            printf(",%d", isinf(INFINITY) != 0);
            printf(",%d", isinf(-INFINITY) != 0);
            printf(",%d", isinf(12.3) != 0);
            div_t div_result = div(23, 10);
            printf(",%d", div_result.quot);
            printf(",%d", div_result.rem);
            double sine = -1.0, cosine = -1.0;
            sincos(0.0, &sine, &cosine);
            printf(",%1.1lf", sine);
            printf(",%1.1lf", cosine);
            float fsine = -1.0f, fcosine = -1.0f;
            sincosf(0.0, &fsine, &fcosine);
            printf(",%1.1f", fsine);
            printf(",%1.1f", fcosine);
            printf("*\\n");
            return 0;
          }
        '''
        self.do_run(src, '*3.14,-3.14,1,0,0,0,1,0,1,1,0,2,3,0.0,1.0,0.0,1.0*')

    def test_erf(self):
        src = '''
          #include <math.h>
          #include <stdio.h>
          int main()
          {
            printf("%1.6f, %1.6f, %1.6f, %1.6f, %1.6f, %1.6f\\n",
                   erf(1.0),
                   erf(3.0),
                   erf(-1.0),
                   erfc(1.0),
                   erfc(3.0),
                   erfc(-1.5));
            return 0;
          }
        '''
        self.do_run(src, '0.842701, 0.999978, -0.842701, 0.157299, 0.000022, 1.966105')

    def test_math_hyperbolic(self):
        src = open(path_from_root('tests', 'hyperbolic', 'src.c'), 'r').read()
        expected = open(path_from_root('tests', 'hyperbolic', 'output.txt'), 'r').read()
        self.do_run(src, expected)

    def test_getgep(self):
        # Generated code includes getelementptr (getelementptr, 0, 1), i.e., GEP as the first param to GEP
        src = '''
          #include <stdio.h>
          struct {
            int y[10];
            int z[10];
          } commonblock;

          int main()
          {
            for (int i = 0; i < 10; ++i) {
              commonblock.y[i] = 1;
              commonblock.z[i] = 2;
            }
            printf("*%d %d*\\n", commonblock.y[0], commonblock.z[0]);
            return 0;
          }
        '''
        self.do_run(src, '*1 2*')

    def test_multiply_defined_symbols(self):
      a1 = "int f() { return 1; }"
      a1_name = os.path.join(self.get_dir(), 'a1.c')
      open(a1_name, 'w').write(a1)
      a2 = "void x() {}"
      a2_name = os.path.join(self.get_dir(), 'a2.c')
      open(a2_name, 'w').write(a2)
      b1 = "int f() { return 2; }"
      b1_name = os.path.join(self.get_dir(), 'b1.c')
      open(b1_name, 'w').write(b1)
      b2 = "void y() {}"
      b2_name = os.path.join(self.get_dir(), 'b2.c')
      open(b2_name, 'w').write(b2)
      main = r'''
        #include <stdio.h>
        int f();
        int main() {
          printf("result: %d\n", f());
          return 0;
        }
      '''
      main_name = os.path.join(self.get_dir(), 'main.c')
      open(main_name, 'w').write(main)

      Building.emcc(a1_name)
      Building.emcc(a2_name)
      Building.emcc(b1_name)
      Building.emcc(b2_name)
      Building.emcc(main_name)

      liba_name = os.path.join(self.get_dir(), 'liba.a')
      Building.emar('cr', liba_name, [a1_name + '.o', a2_name + '.o'])
      libb_name = os.path.join(self.get_dir(), 'libb.a')
      Building.emar('cr', libb_name, [b1_name + '.o', b2_name + '.o'])

      all_name = os.path.join(self.get_dir(), 'all.bc')
      Building.link([main_name + '.o', liba_name, libb_name], all_name)

      self.do_ll_run(all_name, 'result: 1')

    def test_if(self):
        src = '''
          #include <stdio.h>
          int main()
          {
            int x = 5;
            if (x > 3) {
              printf("*yes*\\n");
            }
            return 0;
          }
        '''
        self.do_run(src, '*yes*')

    def test_if_else(self):
        src = '''
          #include <stdio.h>
          int main()
          {
            int x = 5;
            if (x > 10) {
              printf("*yes*\\n");
            } else {
              printf("*no*\\n");
            }
            return 0;
          }
        '''
        self.do_run(src, '*no*')

    def test_loop(self):
        src = '''
          #include <stdio.h>
          int main()
          {
            int x = 5;
            for (int i = 0; i < 6; i++) {
              x += x*i;
              if (x > 1000) {
                if (x % 7 == 0) printf("cheez\\n");
                x /= 2;
                break;
              }
            }
            printf("*%d*\\n", x);
            return 0;
          }
        '''

        self.do_run(src, '*1800*')

        generated = open('src.cpp.o.js', 'r').read()

    def test_stack(self):
        Settings.INLINING_LIMIT = 50

        src = '''
          #include <stdio.h>
          int test(int i) {
            int x = 10;
            if (i > 0) {
              return test(i-1);
            }
            return int(&x); // both for the number, and forces x to not be nativized
          }
          int main()
          {
            // We should get the same value for the first and last - stack has unwound
            int x1 = test(0);
            int x2 = test(100);
            int x3 = test(0);
            printf("*%d,%d*\\n", x3-x1, x2 != x1);
            return 0;
          }
        '''
        self.do_run(src, '*0,1*')

    def test_strings(self):
        src = '''
          #include <stdio.h>
          #include <stdlib.h>
          #include <string.h>

          int main(int argc, char **argv)
          {
            int x = 5, y = 9, magic = 7; // fool compiler with magic
            memmove(&x, &y, magic-7); // 0 should not crash us

            int xx, yy, zz;
            char s[32];
            int cc = sscanf("abc_10.b1_xyz_543_defg", "abc_%d.%2x_xyz_%3d_%3s", &xx, &yy, &zz, s);
            printf("%d:%d,%d,%d,%s\\n", cc, xx, yy, zz, s);

            printf("%d\\n", argc);
            puts(argv[1]);
            puts(argv[2]);
            printf("%d\\n", atoi(argv[3])+2);
            const char *foolingthecompiler = "\\rabcd";
            printf("%d\\n", strlen(foolingthecompiler)); // Tests parsing /0D in llvm - should not be a 0 (end string) then a D!
            printf("%s\\n", NULL); // Should print '(null)', not the string at address 0, which is a real address for us!
            printf("/* a comment */\\n"); // Should not break the generated code!
            printf("// another\\n"); // Should not break the generated code!

            char* strdup_val = strdup("test");
            printf("%s\\n", strdup_val);
            free(strdup_val);

            {
              char *one = "one 1 ONE !";
              char *two = "two 2 TWO ?";
              char three[1024];
              memset(three, '.', 1024);
              three[50] = 0;
              strncpy(three + argc, one + (argc/2), argc+1);
              strncpy(three + argc*3, two + (argc/3), argc+2);
              printf("waka %s\\n", three);
            }

            {
              char *one = "string number one top notch";
              char *two = "fa la sa ho fi FI FO FUM WHEN WHERE WHY HOW WHO";
              char three[1000];
              strcpy(three, &one[argc*2]);
              strcat(three, &two[argc*3]);
              printf("cat |%s|\\n", three);
            }

            return 0;
          }
        '''
        for named in (0, 1):
          print named
          Settings.NAMED_GLOBALS = named
          self.do_run(src, '''4:10,177,543,def\n4\nwowie\ntoo\n76\n5\n(null)\n/* a comment */\n// another\ntest\nwaka ....e 1 O...wo 2 T................................
cat |umber one top notchfi FI FO FUM WHEN WHERE WHY HOW WHO|''', ['wowie', 'too', '74'])
          if self.emcc_args == []:
            gen = open(self.in_dir('src.cpp.o.js')).read()
            assert ('var __str1;' in gen) == named
            assert (gen.count('ALLOC_NONE') < 8) == named

    def test_strcmp_uni(self):
      src = '''
        #include <stdio.h>
        #include <string.h>
        int main()
        {
          #define TEST(func) \
          { \
            char *word = "WORD"; \
            char wordEntry[2] = { -61,-126 }; /* "Â"; */ \
            int cmp = func(word, wordEntry, 2); \
            printf("Compare value " #func " is %d\\n", cmp); \
          }
          TEST(strncmp);
          TEST(strncasecmp);
          TEST(memcmp);
        }
      '''
      self.do_run(src, 'Compare value strncmp is -1\nCompare value strncasecmp is -1\nCompare value memcmp is -1\n')

    def test_strndup(self):
        src = '''
          //---------------
          //- http://pubs.opengroup.org/onlinepubs/9699919799/functions/strndup.html
          //---------------

          #include <stdio.h>
          #include <stdlib.h>
          #include <string.h>

          int main(int argc, char **argv) {
            const char* source = "strndup - duplicate a specific number of bytes from a string";

            char* strdup_val = strndup(source, 0);
            printf("1:%s\\n", strdup_val);
            free(strdup_val);

            strdup_val = strndup(source, 7);
            printf("2:%s\\n", strdup_val);
            free(strdup_val);

            strdup_val = strndup(source, 1000);
            printf("3:%s\\n", strdup_val);
            free(strdup_val);

            strdup_val = strndup(source, 60);
            printf("4:%s\\n", strdup_val);
            free(strdup_val);

            strdup_val = strndup(source, 19);
            printf("5:%s\\n", strdup_val);
            free(strdup_val);

            strdup_val = strndup(source, -1);
            printf("6:%s\\n", strdup_val);
            free(strdup_val);

            return 0;
          }
        '''
        self.do_run(src, '1:\n2:strndup\n3:strndup - duplicate a specific number of bytes from a string\n4:strndup - duplicate a specific number of bytes from a string\n5:strndup - duplicate\n6:\n')

    def test_errar(self):
        src = r'''
          #include <stdio.h>
          #include <errno.h>
          #include <string.h>

          int main() {
            char* err;
            char buffer[200];

            err = strerror(EDOM);
            strerror_r(EWOULDBLOCK, buffer, 200);
            printf("<%s>\n", err);
            printf("<%s>\n", buffer);

            printf("<%d>\n", strerror_r(EWOULDBLOCK, buffer, 0));
            errno = 123;
            printf("<%d>\n", errno);

            return 0;
          }
          '''
        expected = '''
          <Numerical argument out of domain>
          <Resource temporarily unavailable>
          <34>
          <123>
          '''
        self.do_run(src, re.sub('(^|\n)\s+', '\\1', expected))

    def test_mainenv(self):
        src = '''
          #include <stdio.h>
          int main(int argc, char **argv, char **envp)
          {
            printf("*%p*\\n", envp);
            return 0;
          }
        '''
        self.do_run(src, '*(nil)*')

    def test_funcs(self):
        src = '''
          #include <stdio.h>
          int funcy(int x)
          {
            return x*9;
          }
          int main()
          {
            printf("*%d,%d*\\n", funcy(8), funcy(10));
            return 0;
          }
        '''
        self.do_run(src, '*72,90*')

    def test_structs(self):
        src = '''
          #include <stdio.h>
          struct S
          {
            int x, y;
          };
          int main()
          {
            S a, b;
            a.x = 5; a.y = 6;
            b.x = 101; b.y = 7009;
            S *c, *d;
            c = &a;
            c->x *= 2;
            c = &b;
            c->y -= 1;
            d = c;
            d->y += 10;
            printf("*%d,%d,%d,%d,%d,%d,%d,%d*\\n", a.x, a.y, b.x, b.y, c->x, c->y, d->x, d->y);
            return 0;
          }
        '''
        self.do_run(src, '*10,6,101,7018,101,7018,101,7018*')

    gen_struct_src = '''
          #include <stdio.h>
          #include <stdlib.h>
          #include "emscripten.h"

          struct S
          {
            int x, y;
          };
          int main()
          {
            S* a = {{gen_struct}};
            a->x = 51; a->y = 62;
            printf("*%d,%d*\\n", a->x, a->y);
            {{del_struct}}(a);
            return 0;
          }
    '''

    def test_mallocstruct(self):
        self.do_run(self.gen_struct_src.replace('{{gen_struct}}', '(S*)malloc(sizeof(S))').replace('{{del_struct}}', 'free'), '*51,62*')

    def test_newstruct(self):
        if self.emcc_args is None: return self.skip('requires emcc')
        self.do_run(self.gen_struct_src.replace('{{gen_struct}}', 'new S').replace('{{del_struct}}', 'delete'), '*51,62*')

    def test_addr_of_stacked(self):
        src = '''
          #include <stdio.h>
          void alter(int *y)
          {
            *y += 5;
          }
          int main()
          {
            int x = 2;
            alter(&x);
            printf("*%d*\\n", x);
            return 0;
          }
        '''
        self.do_run(src, '*7*')

    def test_globals(self):
        src = '''
          #include <stdio.h>

          char cache[256], *next = cache;

          int main()
          {
            cache[10] = 25;
            next[20] = 51;
            printf("*%d,%d*\\n", next[10], cache[20]);
            return 0;
          }
        '''
        self.do_run(src, '*25,51*')

    def test_linked_list(self):
        src = '''
          #include <stdio.h>
          struct worker_args {
            int value;
            struct worker_args *next;
          };
          int main()
          {
            worker_args a;
            worker_args b;
            a.value = 60;
            a.next = &b;
            b.value = 900;
            b.next = NULL;
            worker_args* c = &a;
            int total = 0;
            while (c) {
              total += c->value;
              c = c->next;
            }

            // Chunk of em
            worker_args chunk[10];
            for (int i = 0; i < 9; i++) {
              chunk[i].value = i*10;
              chunk[i].next = &chunk[i+1];
            }
            chunk[9].value = 90;
            chunk[9].next = &chunk[0];

            c = chunk;
            do {
              total += c->value;
              c = c->next;
            } while (c != chunk);
 
            printf("*%d,%d*\\n", total, b.next);
            // NULL *is* 0, in C/C++. No JS null! (null == 0 is false, etc.)

            return 0;
          }
        '''
        self.do_run(src, '*1410,0*')

    def test_sup(self):
        src = '''
          #include <stdio.h>

          struct S4   { int x;          }; // size: 4
          struct S4_2 { short x, y;     }; // size: 4, but for alignment purposes, 2
          struct S6   { short x, y, z;  }; // size: 6
          struct S6w  { char x[6];      }; // size: 6 also
          struct S6z  { int x; short y; }; // size: 8, since we align to a multiple of the biggest - 4

          struct C___  { S6 a, b, c; int later; };
          struct Carr  { S6 a[3]; int later; }; // essentially the same, but differently defined
          struct C__w  { S6 a; S6w b; S6 c; int later; }; // same size, different struct
          struct Cp1_  { int pre; short a; S6 b, c; int later; }; // fillers for a
          struct Cp2_  { int a; short pre; S6 b, c; int later; }; // fillers for a (get addr of the other filler)
          struct Cint  { S6 a; int  b; S6 c; int later; }; // An int (different size) for b
          struct C4__  { S6 a; S4   b; S6 c; int later; }; // Same size as int from before, but a struct
          struct C4_2  { S6 a; S4_2 b; S6 c; int later; }; // Same size as int from before, but a struct with max element size 2
          struct C__z  { S6 a; S6z  b; S6 c; int later; }; // different size, 8 instead of 6

          int main()
          {
            #define TEST(struc) \\
            { \\
              struc *s = 0; \\
              printf("*%s: %d,%d,%d,%d<%d*\\n", #struc, (int)&(s->a), (int)&(s->b), (int)&(s->c), (int)&(s->later), sizeof(struc)); \\
            }
            #define TEST_ARR(struc) \\
            { \\
              struc *s = 0; \\
              printf("*%s: %d,%d,%d,%d<%d*\\n", #struc, (int)&(s->a[0]), (int)&(s->a[1]), (int)&(s->a[2]), (int)&(s->later), sizeof(struc)); \\
            }
            printf("sizeofs:%d,%d\\n", sizeof(S6), sizeof(S6z));
            TEST(C___);
            TEST_ARR(Carr);
            TEST(C__w);
            TEST(Cp1_);
            TEST(Cp2_);
            TEST(Cint);
            TEST(C4__);
            TEST(C4_2);
            TEST(C__z);
            return 0;
          }
        '''
        if Settings.QUANTUM_SIZE == 1:
          self.do_run(src, 'sizeofs:6,8\n*C___: 0,3,6,9<24*\n*Carr: 0,3,6,9<24*\n*C__w: 0,3,9,12<24*\n*Cp1_: 1,2,5,8<24*\n*Cp2_: 0,2,5,8<24*\n*Cint: 0,3,4,7<24*\n*C4__: 0,3,4,7<24*\n*C4_2: 0,3,5,8<20*\n*C__z: 0,3,5,8<28*')
        else:
          self.do_run(src, 'sizeofs:6,8\n*C___: 0,6,12,20<24*\n*Carr: 0,6,12,20<24*\n*C__w: 0,6,12,20<24*\n*Cp1_: 4,6,12,20<24*\n*Cp2_: 0,6,12,20<24*\n*Cint: 0,8,12,20<24*\n*C4__: 0,8,12,20<24*\n*C4_2: 0,6,10,16<20*\n*C__z: 0,8,16,24<28*')

    def test_assert(self):
        src = '''
          #include <stdio.h>
          #include <assert.h>
          int main() {
            assert(1 == true); // pass
            assert(1 == false); // fail
            return 0;
          }
        '''
        self.do_run(src, 'Assertion failed: 1 == false')

    def test_longjmp(self):
        if Settings.ASM_JS: return self.skip('asm does not support longjmp')

        src = r'''
          #include <stdio.h>
          #include <setjmp.h>
           
          static jmp_buf buf;
           
          void second(void) {
              printf("second\n");         // prints
              longjmp(buf,1);             // jumps back to where setjmp was called - making setjmp now return 1
          }
           
          void first(void) {
              second();
              printf("first\n");          // does not print
          }
           
          int main() {
              volatile int x = 0;
              if ( ! setjmp(buf) ) {
                  x++;
                  first();                // when executed, setjmp returns 0
              } else {                    // when longjmp jumps back, setjmp returns 1
                  printf("main: %d\n", x);       // prints
              }
           
              return 0;
          }
        '''
        self.do_run(src, 'second\nmain: 1\n')

    def test_longjmp2(self):
      if Settings.ASM_JS: return self.skip('asm does not support longjmp')

      src = r'''
        #include <setjmp.h>
        #include <stdio.h>

        typedef struct {
          jmp_buf* jmp;
        } jmp_state;

        void stack_manipulate_func(jmp_state* s, int level) {
          jmp_buf buf;

          printf("Entering stack_manipulate_func, level: %d\n", level);

          if (level == 0) {
            s->jmp = &buf;
            if (setjmp(*(s->jmp)) == 0) {
              printf("Setjmp normal execution path, level: %d\n", level);
              stack_manipulate_func(s, level + 1);
            } else {
              printf("Setjmp error execution path, level: %d\n", level);
            }
          } else {
            printf("Perform longjmp at level %d\n", level);
            longjmp(*(s->jmp), 1);
          }

          printf("Exiting stack_manipulate_func, level: %d\n", level);
        }

        int main(int argc, char *argv[]) {
          jmp_state s;
          s.jmp = NULL;
          stack_manipulate_func(&s, 0);

          return 0;
        }
        '''
      self.do_run(src, '''Entering stack_manipulate_func, level: 0
Setjmp normal execution path, level: 0
Entering stack_manipulate_func, level: 1
Perform longjmp at level 1
Setjmp error execution path, level: 0
Exiting stack_manipulate_func, level: 0
''')

    def test_longjmp3(self):
      if Settings.ASM_JS: return self.skip('asm does not support longjmp')

      src = r'''
        #include <setjmp.h>
        #include <stdio.h>

        typedef struct {
          jmp_buf* jmp;
        } jmp_state;

        void setjmp_func(jmp_state* s, int level) {
          jmp_buf* prev_jmp = s->jmp;
          jmp_buf c_jmp;

          if (level == 2) {
            printf("level is 2, perform longjmp!\n");
            longjmp(*(s->jmp), 1);
          }

          if (setjmp(c_jmp) == 0) {
            printf("setjmp normal execution path, level: %d\n", level);
            s->jmp = &c_jmp;
            setjmp_func(s, level + 1);
          } else {
            printf("setjmp exception execution path, level: %d\n", level);
            if (prev_jmp) {
              printf("prev_jmp is not empty, continue with longjmp!\n");
              s->jmp = prev_jmp;
              longjmp(*(s->jmp), 1);
            }
          }

          printf("Exiting setjmp function, level: %d\n", level);
        }

        int main(int argc, char *argv[]) {
          jmp_state s;
          s.jmp = NULL;

          setjmp_func(&s, 0);

          return 0;
        }
        '''
      self.do_run(src, '''setjmp normal execution path, level: 0
setjmp normal execution path, level: 1
level is 2, perform longjmp!
setjmp exception execution path, level: 1
prev_jmp is not empty, continue with longjmp!
setjmp exception execution path, level: 0
Exiting setjmp function, level: 0
''')

    def test_longjmp4(self):
      if Settings.ASM_JS: return self.skip('asm does not support longjmp')

      src = r'''
        #include <setjmp.h>
        #include <stdio.h>

        typedef struct {
          jmp_buf* jmp;
        } jmp_state;

        void second_func(jmp_state* s);

        void first_func(jmp_state* s) {
          jmp_buf* prev_jmp = s->jmp;
          jmp_buf c_jmp;
          volatile int once = 0;

          if (setjmp(c_jmp) == 0) {
            printf("Normal execution path of first function!\n");

            s->jmp = &c_jmp;
            second_func(s);
          } else {
            printf("Exception execution path of first function! %d\n", once);

            if (!once) {
              printf("Calling longjmp the second time!\n");
              once = 1;
              longjmp(*(s->jmp), 1);
            }
          }
        }

        void second_func(jmp_state* s) {
          longjmp(*(s->jmp), 1);
        }

        int main(int argc, char *argv[]) {
          jmp_state s;
          s.jmp = NULL;

          first_func(&s);

          return 0;
        }
        '''
      self.do_run(src, '''Normal execution path of first function!
Exception execution path of first function! 0
Calling longjmp the second time!
Exception execution path of first function! 1
''')

    def test_exceptions(self):
        if Settings.ASM_JS: return self.skip('no exceptions support in asm')
        if Settings.QUANTUM_SIZE == 1: return self.skip("we don't support libcxx in q1")

        Settings.EXCEPTION_DEBUG = 1

        self.banned_js_engines = [NODE_JS] # node issue 1669, exception causes stdout not to be flushed
        Settings.DISABLE_EXCEPTION_CATCHING = 0
        if self.emcc_args is None:
          if Building.LLVM_OPTS: return self.skip('optimizing bitcode before emcc can confuse libcxx inclusion')
          self.emcc_args = [] # libc++ auto-inclusion is only done if we use emcc
        else:
          if '-O2' in self.emcc_args:
            self.emcc_args += ['--closure', '1'] # Use closure here for some additional coverage

        src = '''
          #include <stdio.h>
          void thrower() {
            printf("infunc...");
            throw(99);
            printf("FAIL");
          }
          int main() {
            try {
              printf("*throw...");
              throw(1);
              printf("FAIL");
            } catch(...) {
              printf("caught!");
            }
            try {
              thrower();
            } catch(...) {
              printf("done!*\\n");
            }
            return 0;
          }
        '''
        self.do_run(src, '*throw...caught!infunc...done!*')

        Settings.DISABLE_EXCEPTION_CATCHING = 1
        self.do_run(src, 'Exception catching is disabled, this exception cannot be caught. Compile with -s DISABLE_EXCEPTION_CATCHING=0')

        src = '''
        #include <iostream>
        
        class MyException
        {
        public:
            MyException(){ std::cout << "Construct..."; }
            MyException( const MyException & ) { std::cout << "Copy..."; }
            ~MyException(){ std::cout << "Destruct..."; }
        };
        
        int function()
        {
            std::cout << "Throw...";
            throw MyException();
        }
        
        int function2()
        {
            return function();
        }
        
        int main()
        {
            try 
            {
                function2();
            }
            catch (MyException & e)
            {
                std::cout << "Catched...";
            }
             
            try 
            {
                function2();
            }
            catch (MyException e)
            {
                std::cout << "Catched...";
            }
        
            return 0;
        }
        '''
        
        Settings.DISABLE_EXCEPTION_CATCHING = 0
        if '-O2' in self.emcc_args:
          self.emcc_args.pop() ; self.emcc_args.pop() # disable closure to work around a closure bug
        self.do_run(src, 'Throw...Construct...Catched...Destruct...Throw...Construct...Copy...Catched...Destruct...Destruct...')

    def test_white_list_exception(self):
      if Settings.ASM_JS: return self.skip('no exceptions support in asm')
      Settings.DISABLE_EXCEPTION_CATCHING = 2
      Settings.EXCEPTION_CATCHING_WHITELIST = ["__Z12somefunctionv"]
      Settings.INLINING_LIMIT = 50 # otherwise it is inlined and not identified

      src = '''
          #include <stdio.h>
          
          void thrower() {
            printf("infunc...");
            throw(99);
            printf("FAIL");
          }

          void somefunction() {
            try {
              thrower();
            } catch(...) {
              printf("done!*\\n");
            }
          }

          int main() {
            somefunction();
            return 0;
          }
        '''
      self.do_run(src, 'infunc...done!*')

      Settings.DISABLE_EXCEPTION_CATCHING = 0
      Settings.EXCEPTION_CATCHING_WHITELIST = []


    def test_uncaught_exception(self):
        if Settings.ASM_JS: return self.skip('no exceptions support in asm')
        if self.emcc_args is None: return self.skip('no libcxx inclusion without emcc')

        Settings.DISABLE_EXCEPTION_CATCHING = 0

        src = r'''
          #include <stdio.h>
          #include <exception>
          struct X {
            ~X() {
              printf("exception? %s\n", std::uncaught_exception() ? "yes" : "no");
            }
          };
          int main() {
            printf("exception? %s\n", std::uncaught_exception() ? "yes" : "no");
            try {
              X x;
              throw 1;
            } catch(...) {
              printf("exception? %s\n", std::uncaught_exception() ? "yes" : "no");
            }
            printf("exception? %s\n", std::uncaught_exception() ? "yes" : "no");
            return 0;
          }
        '''
        self.do_run(src, 'exception? no\nexception? yes\nexception? no\nexception? no\n')

        src = r'''
          #include <fstream>
          #include <iostream>
          int main() {
            std::ofstream os("test");
            os << std::unitbuf << "foo"; // trigger a call to std::uncaught_exception from
                                         // std::basic_ostream::sentry::~sentry
            std::cout << "success";
          }
        '''
        self.do_run(src, 'success')

    def test_typed_exceptions(self):
        if Settings.ASM_JS: return self.skip('no exceptions support in asm')
        Settings.DISABLE_EXCEPTION_CATCHING = 0
        Settings.SAFE_HEAP = 0  # Throwing null will cause an ignorable null pointer access.
        src = open(path_from_root('tests', 'exceptions', 'typed.cpp'), 'r').read()
        expected = open(path_from_root('tests', 'exceptions', 'output.txt'), 'r').read()
        self.do_run(src, expected)

    def test_multiexception(self):
      if Settings.ASM_JS: return self.skip('no exceptions support in asm')
      Settings.DISABLE_EXCEPTION_CATCHING = 0
      src = r'''
#include <stdio.h>

static int current_exception_id = 0;

typedef struct {
  int jmp;
} jmp_state;

void setjmp_func(jmp_state* s, int level) {
  int prev_jmp = s->jmp;
  int c_jmp;

  if (level == 2) {
    printf("level is 2, perform longjmp!\n");
    throw 1;
  }

  c_jmp = current_exception_id++;
  try {
    printf("setjmp normal execution path, level: %d, prev_jmp: %d\n", level, prev_jmp);
    s->jmp = c_jmp;
    setjmp_func(s, level + 1);
  } catch (int catched_eid) {
    printf("caught %d\n", catched_eid);
    if (catched_eid == c_jmp) {
      printf("setjmp exception execution path, level: %d, prev_jmp: %d\n", level, prev_jmp);
      if (prev_jmp != -1) {
        printf("prev_jmp is not empty, continue with longjmp!\n");
        s->jmp = prev_jmp;
        throw s->jmp;
      }
    } else {
      throw;
    }
  }

  printf("Exiting setjmp function, level: %d, prev_jmp: %d\n", level, prev_jmp);
}

int main(int argc, char *argv[]) {
  jmp_state s;
  s.jmp = -1;

  setjmp_func(&s, 0);

  return 0;
}
'''
      self.do_run(src, '''setjmp normal execution path, level: 0, prev_jmp: -1
setjmp normal execution path, level: 1, prev_jmp: 0
level is 2, perform longjmp!
caught 1
setjmp exception execution path, level: 1, prev_jmp: 0
prev_jmp is not empty, continue with longjmp!
caught 0
setjmp exception execution path, level: 0, prev_jmp: -1
Exiting setjmp function, level: 0, prev_jmp: -1
''')

    def test_exit_stack(self):
      if self.emcc_args is None: return self.skip('requires emcc')
      if Settings.ASM_JS: return self.skip('uses report_stack without exporting')

      Settings.INLINING_LIMIT = 50

      src = r'''
        #include <stdio.h>
        #include <stdlib.h>

        extern "C" {
          extern void report_stack(int x);
        }

        char moar() {
          char temp[125];
          for (int i = 0; i < 125; i++) temp[i] = i*i;
          for (int i = 1; i < 125; i++) temp[i] += temp[i-1]/2;
          if (temp[100] != 99) exit(1);
          return temp[120];
        }

        int main(int argc, char *argv[]) {
          report_stack((int)alloca(4));
          printf("*%d*\n", moar());
          return 0;
        }
      '''

      open(os.path.join(self.get_dir(), 'pre.js'), 'w').write('''
        var initialStack = -1;
        var _report_stack = function(x) {
          Module.print('reported');
          initialStack = x;
        }
        var Module = {
          postRun: function() {
            Module.print('postRun');
            assert(initialStack == STACKTOP, [initialStack, STACKTOP]);
            Module.print('ok.');
          }
        };
      ''')

      self.emcc_args += ['--pre-js', 'pre.js']
      self.do_run(src, '''reported\nExit Status: 1\npostRun\nok.\n''')

    def test_class(self):
        src = '''
          #include <stdio.h>
          struct Random {
             enum { IM = 139968, IA = 3877, IC = 29573 };
             Random() : last(42) {}
             float get( float max = 1.0f ) {
                last = ( last * IA + IC ) % IM;
                return max * last / IM;
             }
          protected:
             unsigned int last;
          } rng1;
          int main()
          {
            Random rng2;
            int count = 0;
            for (int i = 0; i < 100; i++) {
              float x1 = rng1.get();
              float x2 = rng2.get();
              printf("%f, %f\\n", x1, x2);
              if (x1 != x2) count += 1;
            }
            printf("*%d*\\n", count);
            return 0;
          }
        '''
        self.do_run(src, '*0*')

    def test_inherit(self):
        src = '''
          #include <stdio.h>
          struct Parent {
            int x1, x2;
          };
          struct Child : Parent {
            int y;
          };
          int main()
          {
            Parent a;
            a.x1 = 50;
            a.x2 = 87;
            Child b;
            b.x1 = 78;
            b.x2 = 550;
            b.y = 101;
            Child* c = (Child*)&a;
            c->x1 ++;
            c = &b;
            c->y --;
            printf("*%d,%d,%d,%d,%d,%d,%d*\\n", a.x1, a.x2, b.x1, b.x2, b.y, c->x1, c->x2);
            return 0;
          }
        '''
        self.do_run(src, '*51,87,78,550,100,78,550*')

    def test_isdigit_l(self):
        if self.emcc_args is None: return self.skip('no libcxx inclusion without emcc')

        src = '''
          #include <iostream>
          int main() {
            using namespace std;
            use_facet<num_put<char> >(cout.getloc()).put(cout, cout, '0', 3.14159265);
          }
        '''
        self.do_run(src, '3.14159')

    def test_polymorph(self):
        if self.emcc_args is None: return self.skip('requires emcc')
        src = '''
          #include <stdio.h>
          struct Pure {
            virtual int implme() = 0;
          };
          struct Parent : Pure {
            virtual int getit() { return 11; };
            int implme() { return 32; }
          };
          struct Child : Parent {
            int getit() { return 74; }
            int implme() { return 1012; }
          };

          struct Other {
            int one() { return 11; }
            int two() { return 22; }
          };

          int main()
          {
            Parent *x = new Parent();
            Parent *y = new Child();
            printf("*%d,%d,%d,%d*\\n", x->getit(), y->getit(), x->implme(), y->implme());

            Other *o = new Other;
            int (Other::*Ls)() = &Other::one;
            printf("*%d*\\n", (o->*(Ls))());
            Ls = &Other::two;
            printf("*%d*\\n", (o->*(Ls))());

            return 0;
          }
        '''
        self.do_run(src, '*11,74,32,1012*\n*11*\n*22*')

    def test_segfault(self):
      if self.emcc_args is None: return self.skip('SAFE_HEAP without ta2 means we check types too, which hide segfaults')
      if Settings.ASM_JS: return self.skip('asm does not support safe heap')

      Settings.SAFE_HEAP = 1

      for addr in ['0', '7', 'new D2()']:
        print addr
        src = r'''
          #include <stdio.h>

          struct Classey {
            virtual void doIt() = 0;
          };

          struct D1 : Classey {
            virtual void doIt() { printf("fleefl\n"); }
          };

          struct D2 : Classey {
            virtual void doIt() { printf("marfoosh\n"); }
          };

          int main(int argc, char **argv)
          {
            Classey *p = argc == 100 ? new D1() : (Classey*)%s;

            p->doIt();

            return 0;
          }
        ''' % addr
        self.do_run(src, 'segmentation fault' if addr.isdigit() else 'marfoosh')

    def test_safe_dyncalls(self):
      if Settings.ASM_JS: return self.skip('asm does not support missing function stack traces')
      if Settings.SAFE_HEAP: return self.skip('safe heap warning will appear instead')
      if self.emcc_args is None: return self.skip('need libc')

      Settings.SAFE_DYNCALLS = 1

      for cond, body, work in [(True, True, False), (True, False, False), (False, True, True), (False, False, False)]:
        print cond, body, work
        src = r'''
          #include <stdio.h>

          struct Classey {
            virtual void doIt() = 0;
          };

          struct D1 : Classey {
            virtual void doIt() BODY;
          };

          int main(int argc, char **argv)
          {
            Classey *p = argc COND 100 ? new D1() : NULL;
            printf("%p\n", p);
            p->doIt();

            return 0;
          }
        '''.replace('COND', '==' if cond else '!=').replace('BODY', r'{ printf("all good\n"); }' if body else '')
        self.do_run(src, 'dyncall error: vi' if not work else 'all good')

    def test_dynamic_cast(self):
        if self.emcc_args is None: return self.skip('need libcxxabi')

        src = r'''
          #include <stdio.h>

          struct Support {
            virtual void f() {
              printf("f()\n");
            }
          };

          struct Derived : Support {
          };

          int main() {
            Support * p = new Derived;
            dynamic_cast<Derived*>(p)->f();
          }
        '''
        self.do_run(src, 'f()\n')

        src = '''
          #include <stdio.h>

          class CBase { virtual void dummy() {} };
          class CDerived : public CBase { int a; };
          class CDerivedest : public CDerived { float b; };

          int main ()
          {
            CBase *pa = new CBase;
            CBase *pb = new CDerived;
            CBase *pc = new CDerivedest;

            printf("a1: %d\\n", dynamic_cast<CDerivedest*>(pa) != NULL);
            printf("a2: %d\\n", dynamic_cast<CDerived*>(pa) != NULL);
            printf("a3: %d\\n", dynamic_cast<CBase*>(pa) != NULL);

            printf("b1: %d\\n", dynamic_cast<CDerivedest*>(pb) != NULL);
            printf("b2: %d\\n", dynamic_cast<CDerived*>(pb) != NULL);
            printf("b3: %d\\n", dynamic_cast<CBase*>(pb) != NULL);

            printf("c1: %d\\n", dynamic_cast<CDerivedest*>(pc) != NULL);
            printf("c2: %d\\n", dynamic_cast<CDerived*>(pc) != NULL);
            printf("c3: %d\\n", dynamic_cast<CBase*>(pc) != NULL);

            return 0;
          }
        '''
        self.do_run(src, 'a1: 0\na2: 0\na3: 1\nb1: 0\nb2: 1\nb3: 1\nc1: 1\nc2: 1\nc3: 1\n')

    def test_dynamic_cast_2(self):
      if self.emcc_args is None: return self.skip('need libcxxabi')

      src = r'''
        #include <stdio.h>
        #include <typeinfo>

        class Class {};

        int main() {
            const Class* dp = dynamic_cast<const Class*>(&typeid(Class));
            // should return dp == NULL,
            printf("pointer: %p\n", dp);
        }
        '''
      self.do_run(src, "pointer: (nil)")

    def test_funcptr(self):
        src = '''
          #include <stdio.h>
          int calc1() { return 26; }
          int calc2() { return 90; }
          typedef int (*fp_t)();

          fp_t globally1 = calc1;
          fp_t globally2 = calc2;

          int nothing(const char *str) { return 0; }

          int main()
          {
            fp_t fp = calc1;
            void *vp = (void*)fp;
            fp_t fpb = (fp_t)vp;
            fp_t fp2 = calc2;
            void *vp2 = (void*)fp2;
            fp_t fpb2 = (fp_t)vp2;
            printf("*%d,%d,%d,%d,%d,%d*\\n", fp(), fpb(), fp2(), fpb2(), globally1(), globally2());

            fp_t t = calc1;
            printf("*%d,%d", t == calc1, t == calc2);
            t = calc2;
            printf(",%d,%d*\\n", t == calc1, t == calc2);

            int (*other)(const char *str);
            other = nothing;
            other("*hello!*");
            other = puts;
            other("*goodbye!*");

            return 0;
          }
        '''
        self.do_run(src, '*26,26,90,90,26,90*\n*1,0,0,1*\n*goodbye!*')

    def test_mathfuncptr(self):
        src = '''
          #include <math.h>
          #include <stdio.h>

          int
          main(void) {
           float (*fn)(float) = &sqrtf;
           float (*fn2)(float) = &fabsf;
           printf("fn2(-5) = %d, fn(10) = %f\\n", (int)fn2(-5), fn(10));
           return 0;
          }
          '''
        self.do_run(src, 'fn2(-5) = 5, fn(10) = 3.16')

    def test_funcptrfunc(self):
      src = r'''
        #include <stdio.h>

        typedef void (*funcptr)(int, int);
        typedef funcptr (*funcptrfunc)(int);

        funcptr __attribute__ ((noinline)) getIt(int x) {
          return (funcptr)x;
        }

        int main(int argc, char **argv)
        {
          funcptrfunc fpf = argc < 100 ? getIt : NULL;
          printf("*%p*\n", fpf(argc));
          return 0;
        }
      '''
      self.do_run(src, '*0x1*')

    def test_emptyclass(self):
        if self.emcc_args is None: return self.skip('requires emcc')
        src = '''
        #include <stdio.h>

        struct Randomized {
          Randomized(int x) {
            printf("*zzcheezzz*\\n");
          }
        };

        int main( int argc, const char *argv[] ) {
          new Randomized(55);

          return 0;
        }
        '''
        self.do_run(src, '*zzcheezzz*')

    def test_alloca(self):
      src = '''
        #include <stdio.h>
        #include <stdlib.h>

        int main() {
          char *pc;
          pc = (char *)alloca(5);
          printf("z:%d*%d*\\n", pc > 0, (int)pc);
          return 0;
        }
      '''
      self.do_run(src, 'z:1*', force_c=True)

    def test_alloca_stack(self):
      if self.emcc_args is None: return # too slow in other modes

      # We should not blow up the stack with numerous allocas
      src = '''
        #include <stdio.h>
        #include <stdlib.h>

        func(int i) {
          char *pc = (char *)alloca(100);
          *pc = i;
          (*pc)++;
          return (*pc) % 10;
        }
        int main() {
          int total = 0;
          for (int i = 0; i < 1024*1024; i++)
            total += func(i);
          printf("ok:%d*\\n", total);
          return 0;
        }
      '''
      self.do_run(src, 'ok:-32768*', force_c=True)

    def test_stack_byval(self):
      if self.emcc_args is None: return # too slow in other modes

      # We should also not blow up the stack with byval arguments
      src = r'''
        #include<stdio.h>
        struct vec {
          int x, y, z;
          vec(int x_, int y_, int z_) : x(x_), y(y_), z(z_) {}
          static vec add(vec a, vec b) {
            return vec(a.x+b.x, a.y+b.y, a.z+b.z);
          }
        };
        int main() {
          int total = 0;
          for (int i = 0; i < 1000; i++) {
            for (int j = 0; j < 1000; j++) {
              vec c(i+i%10, j*2, i%255);
              vec d(j*2, j%255, i%120);
              vec f = vec::add(c, d);
              total += (f.x + f.y + f.z) % 100;
              total %= 10240;
            }
          }
          printf("sum:%d*\n", total);
          return 0;
        }
      '''
      self.do_run(src, 'sum:9780*')

    def test_stack_varargs(self):
      if self.emcc_args is None: return # too slow in other modes

      Settings.INLINING_LIMIT = 50

      # We should not blow up the stack with numerous varargs
      src = r'''
        #include <stdio.h>
        #include <stdlib.h>

        void func(int i) {
          printf("%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d,%d\n",
                   i, i, i, i, i, i, i, i, i, i, i, i, i, i, i, i, i, i, i, i, i, i, i, i, i, i, i, i, i, i, i, i, i, i, i, i, i, i, i);
        }
        int main() {
          for (int i = 0; i < 1024; i++)
            func(i);
          printf("ok!\n");
          return 0;
        }
      '''
      Settings.TOTAL_STACK = 1024
      self.do_run(src, 'ok!')

    def test_stack_void(self):
      Settings.INLINING_LIMIT = 50

      src = r'''
        #include <stdio.h>

        static char s[100]="aaaaa";
        static int func(void) {
          if(s[0]!='a') return 0; 
          printf("iso open %s\n", s, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001, 1.001);
          return 0;
        }
        int main(){
          int i;
          for(i=0;i<5000;i++)
            func();
          printf(".ok.\n");
        }
      '''
      self.do_run(src, '.ok.\n')

    def test_life(self):
      if self.emcc_args is None: return self.skip('need c99')
      self.emcc_args += ['-std=c99']
      src = open(path_from_root('tests', 'life.c'), 'r').read()
      self.do_run(src, '''--------
      [][][]    
[][]            
              []
    []          
[][]            
                
                
                
--------
''', ['8', '8', '25000'], force_c=True)

    def test_array2(self):
        src = '''
          #include <stdio.h>

          static const double grid[4][2] = {
           {-3/3.,-1/3.},{+1/3.,-3/3.},
           {-1/3.,+3/3.},{+3/3.,+1/3.}
          };

          int main() {
            for (int i = 0; i < 4; i++)
              printf("%d:%.2f,%.2f ", i, grid[i][0], grid[i][1]);
            printf("\\n");
            return 0;
          }
          '''
        self.do_run(src, '0:-1.00,-0.33 1:0.33,-1.00 2:-0.33,1.00 3:1.00,0.33')

    def test_array2b(self):
        src = '''
          #include <stdio.h>

          static const struct {
            unsigned char left;
            unsigned char right;
          } prioritah[] = {
             {6, 6}, {6, 6}, {7, 95}, {7, 7}
          };

          int main() {
            printf("*%d,%d\\n", prioritah[1].left, prioritah[1].right);
            printf("%d,%d*\\n", prioritah[2].left, prioritah[2].right);
            return 0;
          }
          '''
        self.do_run(src, '*6,6\n7,95*')


    def test_constglobalstructs(self):
        src = '''
          #include <stdio.h>
          struct IUB {
             int c;
             double p;
             unsigned int pi;
          };

          IUB iub[] = {
             { 'a', 0.27, 5 },
             { 'c', 0.15, 4 },
             { 'g', 0.12, 3 },
             { 't', 0.27, 2 },
          };

          const unsigned char faceedgesidx[6][4] =
          {
              { 4, 5, 8, 10 },
              { 6, 7, 9, 11 },
              { 0, 2, 8, 9  },
              { 1, 3, 10,11 },
              { 0, 1, 4, 6 },
              { 2, 3, 5, 7 },
          };

          int main( int argc, const char *argv[] ) {
             printf("*%d,%d,%d,%d*\\n", iub[0].c, int(iub[1].p*100), iub[2].pi, faceedgesidx[3][2]);
             return 0;
          }
          '''
        self.do_run(src, '*97,15,3,10*')

    def test_conststructs(self):
        src = '''
          #include <stdio.h>
          struct IUB {
             int c;
             double p;
             unsigned int pi;
          };

          int main( int argc, const char *argv[] ) {
             int before = 70;
             IUB iub[] = {
                { 'a', 0.3029549426680, 5 },
                { 'c', 0.15, 4 },
                { 'g', 0.12, 3 },
                { 't', 0.27, 2 },
             };
             int after = 90;
             printf("*%d,%d,%d,%d,%d,%d*\\n", before, iub[0].c, int(iub[1].p*100), iub[2].pi, int(iub[0].p*10000), after);
             return 0;
          }
          '''
        self.do_run(src, '*70,97,15,3,3029,90*')

    def test_bigarray(self):
      if self.emcc_args is None: return self.skip('need ta2 to compress type data on zeroinitializers')

      # avoid "array initializer too large" errors
      src = r'''
        #include <stdio.h>
        #include <assert.h>

        #define SIZE (1024*100)
        struct Struct {
          char x;
          int y;
        };
        Struct buffy[SIZE];

        int main() {
          for (int i = 0; i < SIZE; i++) { assert(buffy[i].x == 0 && buffy[i].y == 0); } // we were zeroinitialized
          for (int i = 0; i < SIZE; i++) { buffy[i].x = i*i; buffy[i].y = i*i*i; } // we can save data
          printf("*%d*\n", buffy[SIZE/3].x);
          return 0;
        }
        '''
      self.do_run(src, '*57*')

    def test_mod_globalstruct(self):
        src = '''
          #include <stdio.h>

          struct malloc_params {
            size_t magic, page_size;
          };

          malloc_params mparams;

          #define SIZE_T_ONE ((size_t)1)
          #define page_align(S) (((S) + (mparams.page_size - SIZE_T_ONE)) & ~(mparams.page_size - SIZE_T_ONE))

          int main()
          {
            mparams.page_size = 4096;
            printf("*%d,%d,%d,%d*\\n", mparams.page_size, page_align(1000), page_align(6000), page_align(66474));
            return 0;
          }
        '''
        self.do_run(src, '*4096,4096,8192,69632*')

    def test_pystruct(self):
        src = '''
          #include <stdio.h>

          // Based on CPython code
          union PyGC_Head {
              struct {
                  union PyGC_Head *gc_next;
                  union PyGC_Head *gc_prev;
                  size_t gc_refs;
              } gc;
              long double dummy;  /* force worst-case alignment */
          } ;

          struct gc_generation {
              PyGC_Head head;
              int threshold; /* collection threshold */
              int count; /* count of allocations or collections of younger
                            generations */
          };

          #define NUM_GENERATIONS 3
          #define GEN_HEAD(n) (&generations[n].head)

          /* linked lists of container objects */
          static struct gc_generation generations[NUM_GENERATIONS] = {
              /* PyGC_Head,                               threshold,      count */
              {{{GEN_HEAD(0), GEN_HEAD(0), 0}},           700,            0},
              {{{GEN_HEAD(1), GEN_HEAD(1), 0}},           10,             0},
              {{{GEN_HEAD(2), GEN_HEAD(2), 0}},           10,             0},
          };

          int main()
          {
            gc_generation *n = NULL;
            printf("*%d,%d,%d,%d,%d,%d,%d,%d*\\n",
              (int)(&n[0]),
              (int)(&n[0].head),
              (int)(&n[0].head.gc.gc_next),
              (int)(&n[0].head.gc.gc_prev),
              (int)(&n[0].head.gc.gc_refs),
              (int)(&n[0].threshold), (int)(&n[0].count), (int)(&n[1])
            );
            printf("*%d,%d,%d*\\n",
              (int)(&generations[0]) ==
              (int)(&generations[0].head.gc.gc_next),
              (int)(&generations[0]) ==
              (int)(&generations[0].head.gc.gc_prev),
              (int)(&generations[0]) ==
              (int)(&generations[1])
            );
            int x1 = (int)(&generations[0]);
            int x2 = (int)(&generations[1]);
            printf("*%d*\\n", x1 == x2);
            for (int i = 0; i < NUM_GENERATIONS; i++) {
              PyGC_Head *list = GEN_HEAD(i);
              printf("%d:%d,%d\\n", i, (int)list == (int)(list->gc.gc_prev), (int)list ==(int)(list->gc.gc_next));
            }
            printf("*%d,%d,%d*\\n", sizeof(PyGC_Head), sizeof(gc_generation), int(GEN_HEAD(2)) - int(GEN_HEAD(1)));
          }
        '''
        if Settings.QUANTUM_SIZE == 1:
          # Compressed memory. Note that sizeof() does give the fat sizes, however!
          self.do_run(src, '*0,0,0,1,2,3,4,5*\n*1,0,0*\n*0*\n0:1,1\n1:1,1\n2:1,1\n*12,20,5*')
        else:
          self.do_run(src, '*0,0,0,4,8,12,16,20*\n*1,0,0*\n*0*\n0:1,1\n1:1,1\n2:1,1\n*12,20,20*')

    def test_ptrtoint(self):
        if self.emcc_args is None: return self.skip('requires emcc')
        src = '''
          #include <stdio.h>

          int main( int argc, const char *argv[] ) {
            char *a = new char[10];
            char *a0 = a+0;
            char *a5 = a+5;
            int *b = new int[10];
            int *b0 = b+0;
            int *b5 = b+5;
            int c = (int)b5-(int)b0; // Emscripten should warn!
            int d = (int)b5-(int)b0; // Emscripten should warn!
            printf("*%d*\\n", (int)a5-(int)a0);
            return 0;
          }
          '''
        runner = self
        def check_warnings(output):
            runner.assertEquals(filter(lambda line: 'Warning' in line, output.split('\n')).__len__(), 4)
        self.do_run(src, '*5*', output_processor=check_warnings)

    def test_sizeof(self):
        if self.emcc_args is None: return self.skip('requires emcc')
        # Has invalid writes between printouts
        Settings.SAFE_HEAP = 0

        src = '''
          #include <stdio.h>
          #include <string.h>
          #include "emscripten.h"

          struct A { int x, y; };

          int main( int argc, const char *argv[] ) {
            int *a = new int[10];
            int *b = new int[1];
            int *c = new int[10];
            for (int i = 0; i < 10; i++)
              a[i] = 2;
            *b = 5;
            for (int i = 0; i < 10; i++)
              c[i] = 8;
            printf("*%d,%d,%d,%d,%d*\\n", a[0], a[9], *b, c[0], c[9]);
            // Should overwrite a, but not touch b!
            memcpy(a, c, 10*sizeof(int));
            printf("*%d,%d,%d,%d,%d*\\n", a[0], a[9], *b, c[0], c[9]);

            // Part 2
            A as[3] = { { 5, 12 }, { 6, 990 }, { 7, 2 } };
            memcpy(&as[0], &as[2], sizeof(A));

            printf("*%d,%d,%d,%d,%d,%d*\\n", as[0].x, as[0].y, as[1].x, as[1].y, as[2].x, as[2].y);
            return 0;
          }
          '''
        self.do_run(src, '*2,2,5,8,8***8,8,5,8,8***7,2,6,990,7,2*', [], lambda x, err: x.replace('\n', '*'))

    def test_emscripten_api(self):
        #if Settings.MICRO_OPTS or Settings.RELOOP or Building.LLVM_OPTS: return self.skip('FIXME')

        src = r'''
          #include <stdio.h>
          #include "emscripten.h"

          extern "C" {
            void save_me_aimee() { printf("mann\n"); }
          }

          int main() {
            // EMSCRIPTEN_COMMENT("hello from the source");
            emscripten_run_script("Module.print('hello world' + '!')");
            printf("*%d*\n", emscripten_run_script_int("5*20"));
            printf("*%s*\n", emscripten_run_script_string("'five'+'six'"));
            emscripten_run_script("Module['_save_me_aimee']()");
            return 0;
          }
          '''

        check = '''
def process(filename):
  src = open(filename, 'r').read()
  # TODO: restore this (see comment in emscripten.h) assert '// hello from the source' in src
'''
        Settings.EXPORTED_FUNCTIONS = ['_main', '_save_me_aimee']
        self.do_run(src, 'hello world!\n*100*\n*fivesix*\nmann\n', post_build=check)

    def test_inlinejs(self):
        if Settings.ASM_JS: return self.skip('asm does not support random code, TODO: something that works in asm')
        src = r'''
          #include <stdio.h>

          double get() {
            double ret = 0;
            __asm __volatile__("12/3.3":"=a"(ret));
            return ret;
          }

          int main() {
            asm("Module.print('Inline JS is very cool')");
            printf("%.2f\n", get());
            return 0;
          }
          '''

        self.do_run(src, 'Inline JS is very cool\n3.64')

    def test_memorygrowth(self):
      if Settings.USE_TYPED_ARRAYS == 0: return self.skip('memory growth is only supported with typed arrays')
      if Settings.ASM_JS: return self.skip('asm does not support memory growth yet')

      # With typed arrays in particular, it is dangerous to use more memory than TOTAL_MEMORY,
      # since we then need to enlarge the heap(s).
      src = r'''
        #include <stdio.h>
        #include <stdlib.h>
        #include <string.h>
        #include <assert.h>
        #include "emscripten.h"

        int main()
        {
          char *buf1 = (char*)malloc(100);
          char *data1 = "hello";
          memcpy(buf1, data1, strlen(data1)+1);

          float *buf2 = (float*)malloc(100);
          float pie = 4.955;
          memcpy(buf2, &pie, sizeof(float));

          printf("*pre: %s,%.3f*\n", buf1, buf2[0]);

          int totalMemory = emscripten_run_script_int("TOTAL_MEMORY");
          char *buf3 = (char*)malloc(totalMemory+1);
          char *buf4 = (char*)malloc(100);
          float *buf5 = (float*)malloc(100);
          //printf("totalMemory: %d bufs: %d,%d,%d,%d,%d\n", totalMemory, buf1, buf2, buf3, buf4, buf5);
          assert((int)buf4 > (int)totalMemory && (int)buf5 > (int)totalMemory);

          printf("*%s,%.3f*\n", buf1, buf2[0]); // the old heap data should still be there

          memcpy(buf4, buf1, strlen(data1)+1);
          memcpy(buf5, buf2, sizeof(float));
          printf("*%s,%.3f*\n", buf4, buf5[0]); // and the new heap space should work too

          return 0;
        }
      '''

      # Fail without memory growth
      self.do_run(src, 'Cannot enlarge memory arrays.')
      fail = open('src.cpp.o.js').read()

      # Win with it
      Settings.ALLOW_MEMORY_GROWTH = 1
      self.do_run(src, '*pre: hello,4.955*\n*hello,4.955*\n*hello,4.955*')
      win = open('src.cpp.o.js').read()

      if self.emcc_args and '-O2' in self.emcc_args:
        # Make sure ALLOW_MEMORY_GROWTH generates different code (should be less optimized)
        code_start = 'var TOTAL_MEMORY = '
        fail = fail[fail.find(code_start):]
        win = win[win.find(code_start):]
        assert len(fail) < len(win), 'failing code - without memory growth on - is more optimized, and smaller'

    def test_ssr(self): # struct self-ref
        src = '''
          #include <stdio.h>

          // see related things in openjpeg
          typedef struct opj_mqc_state {
	          unsigned int qeval;
	          int mps;
	          struct opj_mqc_state *nmps;
	          struct opj_mqc_state *nlps;
          } opj_mqc_state_t;

          static opj_mqc_state_t mqc_states[2] = {
	          {0x5600, 0, &mqc_states[2], &mqc_states[3]},
	          {0x5602, 1, &mqc_states[3], &mqc_states[2]},
          };

          int main() {
            printf("*%d*\\n", (int)(mqc_states+1)-(int)mqc_states);
            for (int i = 0; i < 2; i++)
              printf("%d:%d,%d,%d,%d\\n", i, mqc_states[i].qeval, mqc_states[i].mps,
                     (int)mqc_states[i].nmps-(int)mqc_states, (int)mqc_states[i].nlps-(int)mqc_states);
            return 0;
          }
          '''
        if Settings.QUANTUM_SIZE == 1:
          self.do_run(src, '''*4*\n0:22016,0,8,12\n1:22018,1,12,8\n''')
        else:
          self.do_run(src, '''*16*\n0:22016,0,32,48\n1:22018,1,48,32\n''')

    def test_tinyfuncstr(self):
        if self.emcc_args is None: return self.skip('requires emcc')
        src = '''
          #include <stdio.h>

          struct Class {
            static char *name1() { return "nameA"; }
                   char *name2() { return "nameB"; }
          };

          int main() {
            printf("*%s,%s*\\n", Class::name1(), (new Class())->name2());
            return 0;
          }
          '''
        self.do_run(src, '*nameA,nameB*')

    def test_llvmswitch(self):
        Settings.CORRECT_SIGNS = 1

        src = '''
          #include <stdio.h>
          #include <string.h>

          int switcher(int p)
          {
            switch(p) {
              case 'a':
              case 'b':
              case 'c':
                  return p-1;
              case -15:
                  return p+1;
            }
            return p;
          }

          int main( int argc, const char *argv[] ) {
            unsigned int x = 0xfffffff1;
            x >>= 0; // force it to be unsigned for purpose of checking our switch comparison in signed/unsigned
            printf("*%d,%d,%d,%d,%d,%d*\\n", switcher('a'), switcher('b'), switcher('c'), switcher(x), switcher(-15), switcher('e'));
            return 0;
          }
          '''
        self.do_run(src, '*96,97,98,-14,-14,101*')

    # By default, when user has not specified a -std flag, Emscripten should always build .cpp files using the C++03 standard,
    # i.e. as if "-std=c++03" had been passed on the command line. On Linux with Clang 3.2 this is the case, but on Windows
    # with Clang 3.2 -std=c++11 has been chosen as default, because of
    # < jrose> clb: it's deliberate, with the idea that for people who don't care about the standard, they should be using the "best" thing we can offer on that platform
    def test_cxx03_do_run(self):
        src = '''
          #include <stdio.h>
          
          #if __cplusplus != 199711L
          #error By default, if no -std is specified, emscripten should be compiling with -std=c++03!
          #endif

          int main( int argc, const char *argv[] ) {
            printf("Hello world!\\n");
            return 0;
          }
          '''
        self.do_run(src, 'Hello world!')

    def test_bigswitch(self):
      if Settings.RELOOP: return self.skip('TODO: switch in relooper, issue #781')

      src = open(path_from_root('tests', 'bigswitch.cpp')).read()
      self.do_run(src, '''34962: GL_ARRAY_BUFFER (0x8892)
26214: what?
35040: GL_STREAM_DRAW (0x88E0)
''', args=['34962', '26214', '35040'])

    def test_indirectbr(self):
        src = '''
          #include <stdio.h>
          int main(void) {
            const void *addrs[2] = { &&FOO, &&BAR };

            // confuse the optimizer so it doesn't hardcode the jump and avoid generating an |indirectbr| instruction
            int which = 0;
            for (int x = 0; x < 1000; x++) which = (which + x*x) % 7;
            which = (which % 2) + 1;

            goto *addrs[which];

          FOO:
            printf("bad\\n");
            return 0;
          BAR:
            printf("good\\n");
            const void *addr = &&FOO;
            goto *addr;
          }
          '''
        self.do_run(src, 'good\nbad')

    def test_pack(self):
        src = '''
          #include <stdio.h>
          #include <string.h>

          #pragma pack(push,1)
          typedef struct header
          {                           
              unsigned char  id;
              unsigned short colour;
              unsigned char  desc;
          } header;
          #pragma pack(pop)

          typedef struct fatheader
          {                           
              unsigned char  id;
              unsigned short colour;
              unsigned char  desc;
          } fatheader;

          int main( int argc, const char *argv[] ) {
            header h, *ph = 0;
            fatheader fh, *pfh = 0;
            printf("*%d,%d,%d*\\n", sizeof(header), (int)((int)&h.desc - (int)&h.id), (int)(&ph[1])-(int)(&ph[0]));
            printf("*%d,%d,%d*\\n", sizeof(fatheader), (int)((int)&fh.desc - (int)&fh.id), (int)(&pfh[1])-(int)(&pfh[0]));
            return 0;
          }
          '''
        if Settings.QUANTUM_SIZE == 1:
          self.do_run(src, '*4,2,3*\n*6,2,3*')
        else:
          self.do_run(src, '*4,3,4*\n*6,4,6*')

    def test_varargs(self):
        if Settings.QUANTUM_SIZE == 1: return self.skip('FIXME: Add support for this')

        src = '''
          #include <stdio.h>
          #include <stdarg.h>

          void vary(const char *s, ...)
          {
            va_list v;
            va_start(v, s);
            char d[20];
            vsnprintf(d, 20, s, v);
            puts(d);

            // Try it with copying
            va_list tempva;
            __va_copy(tempva, v);
            vsnprintf(d, 20, s, tempva);
            puts(d);

            va_end(v);
          }

          void vary2(char color, const char *s, ...)
          {
            va_list v;
            va_start(v, s);
            char d[21];
            d[0] = color;
            vsnprintf(d+1, 20, s, v);
            puts(d);
            va_end(v);
          }

          #define GETMAX(pref, type) \
            type getMax##pref(int num, ...) \
            { \
              va_list vv; \
              va_start(vv, num); \
              type maxx = va_arg(vv, type); \
              for (int i = 1; i < num; i++) \
              { \
                type curr = va_arg(vv, type); \
                maxx = curr > maxx ? curr : maxx; \
              } \
              va_end(vv); \
              return maxx; \
            }
          GETMAX(i, int);
          GETMAX(D, double);

          int main(int argc, char **argv) {
            vary("*cheez: %d+%d*", 0, 24); // Also tests that '0' is not special as an array ender
            vary("*albeit*"); // Should not fail with no var args in vararg function
            vary2('Q', "%d*", 85);

            int maxxi = getMaxi(6,        2, 5, 21, 4, -10, 19);
            printf("maxxi:%d*\\n", maxxi);
            double maxxD = getMaxD(6,        (double)2.1, (double)5.1, (double)22.1, (double)4.1, (double)-10.1, (double)19.1);
            printf("maxxD:%.2f*\\n", (float)maxxD);

            // And, as a function pointer
            void (*vfp)(const char *s, ...) = argc == 1211 ? NULL : vary;
            vfp("*vfp:%d,%d*", 22, 199);

            return 0;
          }
          '''
        self.do_run(src, '*cheez: 0+24*\n*cheez: 0+24*\n*albeit*\n*albeit*\nQ85*\nmaxxi:21*\nmaxxD:22.10*\n*vfp:22,199*\n*vfp:22,199*\n')

    def test_varargs_byval(self):
      if Settings.USE_TYPED_ARRAYS != 2: return self.skip('FIXME: Add support for this')

      src = r'''
        #include <stdio.h>
        #include <stdarg.h>

        typedef struct type_a {
          union {
            double f;
            void *p;
            int i;
            short sym;
          } value;
        } type_a;

        enum mrb_vtype {
          MRB_TT_FALSE = 0,   /*   0 */
          MRB_TT_CLASS = 9    /*   9 */
        };

        typedef struct type_b {
          enum mrb_vtype tt:8;
        } type_b;

        void print_type_a(int argc, ...);
        void print_type_b(int argc, ...);

        int main(int argc, char *argv[])
        {
          type_a a;
          type_b b;
          a.value.p = (void*) 0x12345678;
          b.tt = MRB_TT_CLASS;

          printf("The original address of a is: %p\n", a.value.p);
          printf("The original type of b is: %d\n", b.tt);

          print_type_a(1, a);
          print_type_b(1, b);

          return 0;
        }

        void print_type_a(int argc, ...) {
          va_list ap;
          type_a a;

          va_start(ap, argc);
          a = va_arg(ap, type_a);
          va_end(ap);

          printf("The current address of a is: %p\n", a.value.p);
        }

        void print_type_b(int argc, ...) {
          va_list ap;
          type_b b;

          va_start(ap, argc);
          b = va_arg(ap, type_b);
          va_end(ap);

          printf("The current type of b is: %d\n", b.tt);
        }
        '''
      self.do_run(src, '''The original address of a is: 0x12345678
The original type of b is: 9
The current address of a is: 0x12345678
The current type of b is: 9
''')

    def test_structbyval(self):
        Settings.INLINING_LIMIT = 50

        # part 1: make sure that normally, passing structs by value works

        src = r'''
          #include <stdio.h>

          struct point
          {
            int x, y;
          };

          void dump(struct point p) {
            p.x++; // should not modify
            p.y++; // anything in the caller!
            printf("dump: %d,%d\n", p.x, p.y);
          }

          void dumpmod(struct point *p) {
            p->x++; // should not modify
            p->y++; // anything in the caller!
            printf("dump: %d,%d\n", p->x, p->y);
          }

          int main( int argc, const char *argv[] ) {
            point p = { 54, 2 };
            printf("pre:  %d,%d\n", p.x, p.y);
            dump(p);
            void (*dp)(point p) = dump; // And, as a function pointer
            dp(p);
            printf("post: %d,%d\n", p.x, p.y);
            dumpmod(&p);
            dumpmod(&p);
            printf("last: %d,%d\n", p.x, p.y);
            return 0;
          }
        '''
        self.do_run(src, 'pre:  54,2\ndump: 55,3\ndump: 55,3\npost: 54,2\ndump: 55,3\ndump: 56,4\nlast: 56,4')

        # Check for lack of warning in the generated code (they should appear in part 2)
        generated = open(os.path.join(self.get_dir(), 'src.cpp.o.js')).read()
        assert 'Casting a function pointer type to another with a different number of arguments.' not in generated, 'Unexpected warning'

        # part 2: make sure we warn about mixing c and c++ calling conventions here

        if not (self.emcc_args is None or self.emcc_args == []): return # Optimized code is missing the warning comments

        header = r'''
          struct point
          {
            int x, y;
          };

        '''
        open(os.path.join(self.get_dir(), 'header.h'), 'w').write(header)

        supp = r'''
          #include <stdio.h>
          #include "header.h"

          void dump(struct point p) {
            p.x++; // should not modify
            p.y++; // anything in the caller!
            printf("dump: %d,%d\n", p.x, p.y);
          }
        '''
        supp_name = os.path.join(self.get_dir(), 'supp.c')
        open(supp_name, 'w').write(supp)

        main = r'''
          #include <stdio.h>
          #include "header.h"

          #ifdef __cplusplus
          extern "C" {
          #endif
            void dump(struct point p);
          #ifdef __cplusplus
          }
          #endif

          int main( int argc, const char *argv[] ) {
            struct point p = { 54, 2 };
            printf("pre:  %d,%d\n", p.x, p.y);
            dump(p);
            void (*dp)(struct point p) = dump; // And, as a function pointer
            dp(p);
            printf("post: %d,%d\n", p.x, p.y);
            return 0;
          }
        '''
        main_name = os.path.join(self.get_dir(), 'main.cpp')
        open(main_name, 'w').write(main)

        Building.emcc(supp_name)
        Building.emcc(main_name)
        all_name = os.path.join(self.get_dir(), 'all.bc')
        Building.link([supp_name + '.o', main_name + '.o'], all_name)

        # This will fail! See explanation near the warning we check for, in the compiler source code
        output = Popen([PYTHON, EMCC, all_name], stderr=PIPE).communicate()
        # Check for warning in the generated code
        generated = open(os.path.join(self.get_dir(), 'src.cpp.o.js')).read()
        assert 'Casting a function pointer type to another with a different number of arguments' in output[1], 'Missing expected warning'

    def test_stdlibs(self):
        if self.emcc_args is None: return self.skip('requires emcc')
        if Settings.USE_TYPED_ARRAYS == 2:
            # Typed arrays = 2 + safe heap prints a warning that messes up our output.
            Settings.SAFE_HEAP = 0
        src = '''
          #include <stdio.h>
          #include <stdlib.h>
          #include <sys/time.h>

          void clean()
          {
            printf("*cleaned*\\n");
          }

          int comparer(const void *a, const void *b) {
            int aa = *((int*)a);
            int bb = *((int*)b);
            return aa - bb;
          }

          int main() {
            // timeofday
            timeval t;
            gettimeofday(&t, NULL);
            printf("*%d,%d\\n", int(t.tv_sec), int(t.tv_usec)); // should not crash

            // atexit
            atexit(clean);

            // qsort
            int values[6] = { 3, 2, 5, 1, 5, 6 };
            qsort(values, 5, sizeof(int), comparer);
            printf("*%d,%d,%d,%d,%d,%d*\\n", values[0], values[1], values[2], values[3], values[4], values[5]);

            printf("*stdin==0:%d*\\n", stdin == 0); // check that external values are at least not NULL
            printf("*%%*\\n");
            printf("*%.1ld*\\n", 5);

            printf("*%.1f*\\n", strtod("66", NULL)); // checks dependency system, as our strtod needs _isspace etc.

            printf("*%ld*\\n", strtol("10", NULL, 0));
            printf("*%ld*\\n", strtol("0", NULL, 0));
            printf("*%ld*\\n", strtol("-10", NULL, 0));
            printf("*%ld*\\n", strtol("12", NULL, 16));

            printf("*%lu*\\n", strtoul("10", NULL, 0));
            printf("*%lu*\\n", strtoul("0", NULL, 0));
            printf("*%lu*\\n", strtoul("-10", NULL, 0));

            printf("*malloc(0)!=0:%d*\\n", malloc(0) != 0); // We should not fail horribly

            return 0;
          }
          '''

        self.do_run(src, '*1,2,3,5,5,6*\n*stdin==0:0*\n*%*\n*5*\n*66.0*\n*10*\n*0*\n*-10*\n*18*\n*10*\n*0*\n*4294967286*\n*malloc(0)!=0:1*\n*cleaned*')

        src = r'''
          #include <stdio.h>
          #include <stdbool.h>

          int main() {
            bool x = true;
            bool y = false;
            printf("*%d*\n", x != y);
            return 0;
          }
        '''

        self.do_run(src, '*1*', force_c=True)

    def test_atexit(self):
      # Confirms they are called in reverse order
      src = r'''
        #include <stdio.h>
        #include <stdlib.h>
        
        static void cleanA() {
          printf("A");
        }
        static void cleanB() {
          printf("B");
        }
        
        int main() {
          atexit(cleanA);
          atexit(cleanB);
          return 0;
        }
        '''
      self.do_run(src, 'BA')

    def test_time(self):
      # XXX Not sure what the right output is here. Looks like the test started failing with daylight savings changes. Modified it to pass again.
      src = open(path_from_root('tests', 'time', 'src.c'), 'r').read()
      expected = open(path_from_root('tests', 'time', 'output.txt'), 'r').read()
      expected2 = open(path_from_root('tests', 'time', 'output2.txt'), 'r').read()
      self.do_run(src, [expected, expected2],
                   extra_emscripten_args=['-H', 'libc/time.h'])
                   #extra_emscripten_args=['-H', 'libc/fcntl.h,libc/sys/unistd.h,poll.h,libc/math.h,libc/langinfo.h,libc/time.h'])

    def test_timeb(self):
      # Confirms they are called in reverse order
      src = r'''
        #include <stdio.h>
        #include <assert.h>
        #include <sys/timeb.h>

        int main() {
          timeb tb;
          tb.timezone = 1;
          printf("*%d\n", ftime(&tb));
          assert(tb.time > 10000);
          assert(tb.timezone == 0);
          assert(tb.dstflag == 0);
          return 0;
        }
        '''
      self.do_run(src, '*0\n')

    def test_time_c(self):
      src = r'''
        #include <time.h>
        #include <stdio.h>

        int main() {
          time_t t = time(0);
          printf("time: %s\n", ctime(&t));
        }
      '''
      self.do_run(src, 'time: ') # compilation check, mainly

    def test_intentional_fault(self):
      # Some programs intentionally segfault themselves, we should compile that into a throw
      src = r'''
        int main () {
          *(volatile char *)0 = 0;
          return 0;
        }
        '''
      self.do_run(src, 'fault on write to 0' if not Settings.ASM_JS else 'Assertion: 0')

    def test_trickystring(self):
      src = r'''
        #include <stdio.h>

        typedef struct
        {
	        int (*f)(void *);
	        void *d;
	        char s[16];
        } LMEXFunctionStruct;

        int f(void *user)
        {
	        return 0;
        }

        static LMEXFunctionStruct const a[] =
        {
	        {f, (void *)(int)'a', "aa"}
        };

        int main()
        {
          printf("ok\n");
	        return a[0].f(a[0].d);
        }
      '''
      self.do_run(src, 'ok\n')

    def test_statics(self):
        # static initializers save i16 but load i8 for some reason
        if Settings.SAFE_HEAP:
          Settings.SAFE_HEAP = 3
          Settings.SAFE_HEAP_LINES = ['src.cpp:19', 'src.cpp:26']

        src = '''
          #include <stdio.h>
          #include <string.h>

          #define CONSTRLEN 32

          char * (*func)(char *, const char *) = NULL;

          void conoutfv(const char *fmt)
          {
              static char buf[CONSTRLEN];
              func(buf, fmt); // call by function pointer to make sure we test strcpy here
              puts(buf);
          }

          struct XYZ {
            float x, y, z;
            XYZ(float a, float b, float c) : x(a), y(b), z(c) { }
            static const XYZ& getIdentity()
            {
              static XYZ iT(1,2,3);
              return iT;
            }
          };
          struct S {
            static const XYZ& getIdentity()
            {
              static const XYZ iT(XYZ::getIdentity());
              return iT;
            }
          };

          int main() {
            func = &strcpy;
            conoutfv("*staticccz*");
            printf("*%.2f,%.2f,%.2f*\\n", S::getIdentity().x, S::getIdentity().y, S::getIdentity().z);
            return 0;
          }
          '''
        self.do_run(src, '*staticccz*\n*1.00,2.00,3.00*')

    def test_copyop(self):
        if self.emcc_args is None: return self.skip('requires emcc')

        # clang generated code is vulnerable to this, as it uses
        # memcpy for assignments, with hardcoded numbers of bytes
        # (llvm-gcc copies items one by one). See QUANTUM_SIZE in
        # settings.js.
        src = '''
          #include <stdio.h>
          #include <math.h>
          #include <string.h>

          struct vec {
            double x,y,z;
            vec() : x(0), y(0), z(0) { };
            vec(const double a, const double b, const double c) : x(a), y(b), z(c) { };
          };

          struct basis {
            vec a, b, c;
            basis(const vec& v) {
              a=v; // should not touch b!
              printf("*%.2f,%.2f,%.2f*\\n", b.x, b.y, b.z);
            }
          };

          int main() {
            basis B(vec(1,0,0));

            // Part 2: similar problem with memset and memmove
            int x = 1, y = 77, z = 2;
            memset((void*)&x, 0, sizeof(int));
            memset((void*)&z, 0, sizeof(int));
            printf("*%d,%d,%d*\\n", x, y, z);
            memcpy((void*)&x, (void*)&z, sizeof(int));
            memcpy((void*)&z, (void*)&x, sizeof(int));
            printf("*%d,%d,%d*\\n", x, y, z);
            memmove((void*)&x, (void*)&z, sizeof(int));
            memmove((void*)&z, (void*)&x, sizeof(int));
            printf("*%d,%d,%d*\\n", x, y, z);
            return 0;
          }
          '''
        self.do_run(src, '*0.00,0.00,0.00*\n*0,77,0*\n*0,77,0*\n*0,77,0*')

    def test_memcpy_memcmp(self):
        src = '''
          #include <stdio.h>
          #include <string.h>
          #include <assert.h>

          #define MAXX 48
          void reset(unsigned char *buffer) {
            for (int i = 0; i < MAXX; i++) buffer[i] = i+1;
          }
          void dump(unsigned char *buffer) {
            for (int i = 0; i < MAXX-1; i++) printf("%2d,", buffer[i]);
            printf("%d\\n", buffer[MAXX-1]);
          }
          int main() {
            unsigned char buffer[MAXX];
            for (int i = MAXX/4; i < MAXX-MAXX/4; i++) {
              for (int j = MAXX/4; j < MAXX-MAXX/4; j++) {
                for (int k = 1; k < MAXX/4; k++) {
                  if (i == j) continue;
                  if (i < j && i+k > j) continue;
                  if (j < i && j+k > i) continue;
                  printf("[%d,%d,%d] ", i, j, k);
                  reset(buffer);
                  memcpy(buffer+i, buffer+j, k);
                  dump(buffer);
                  assert(memcmp(buffer+i, buffer+j, k) == 0);
                  buffer[i + k/2]++;
                  if (buffer[i + k/2] != 0) {
                    assert(memcmp(buffer+i, buffer+j, k) > 0);
                  } else {
                    assert(memcmp(buffer+i, buffer+j, k) < 0);
                  }
                  buffer[i + k/2]--;
                  buffer[j + k/2]++;
                  if (buffer[j + k/2] != 0) {
                    assert(memcmp(buffer+i, buffer+j, k) < 0);
                  } else {
                    assert(memcmp(buffer+i, buffer+j, k) > 0);
                  }
                }
              }
            }
            return 0;
          }
          '''
        def check(result, err):
          return hashlib.sha1(result).hexdigest()
        self.do_run(src, '6c9cdfe937383b79e52ca7a2cce83a21d9f5422c',
                    output_nicerizer = check)

    def test_memcpy2(self):
      src = r'''
        #include <stdio.h>
        #include <string.h>
        #include <assert.h>
        int main() {
          char buffer[256];
          for (int i = 0; i < 10; i++) {
            for (int j = 0; j < 10; j++) {
              for (int k = 0; k < 35; k++) {
                for (int t = 0; t < 256; t++) buffer[t] = t;
                char *dest = buffer + i + 128;
                char *src = buffer+j;
                //printf("%d, %d, %d\n", i, j, k);
                assert(memcpy(dest, src, k) == dest);
                assert(memcmp(dest, src, k) == 0);
              }
            }
          }
          printf("ok.\n");
          return 1;
        }
      '''
      self.do_run(src, 'ok.');

    def test_getopt(self):
        if self.emcc_args is None: return self.skip('needs emcc for libc')

        src = '''
          #pragma clang diagnostic ignored "-Winvalid-pp-token"
          #include <unistd.h>
          #include <stdlib.h>
          #include <stdio.h>

          int
          main(int argc, char *argv[])
          {
             int flags, opt;
             int nsecs, tfnd;

             nsecs = 0;
             tfnd = 0;
             flags = 0;
             while ((opt = getopt(argc, argv, "nt:")) != -1) {
                 switch (opt) {
                 case 'n':
                     flags = 1;
                     break;
                 case 't':
                     nsecs = atoi(optarg);
                     tfnd = 1;
                     break;
                 default: /* '?' */
                     fprintf(stderr, "Usage: %s [-t nsecs] [-n] name\\n",
                             argv[0]);
                     exit(EXIT_FAILURE);
                 }
             }

             printf("flags=%d; tfnd=%d; optind=%d\\n", flags, tfnd, optind);

             if (optind >= argc) {
                 fprintf(stderr, "Expected argument after options\\n");
                 exit(EXIT_FAILURE);
             }

             printf("name argument = %s\\n", argv[optind]);

             /* Other code omitted */

             exit(EXIT_SUCCESS);
          }
        '''
        self.do_run(src, 'flags=1; tfnd=1; optind=4\nname argument = foobar', args=['-t', '12', '-n', 'foobar'])

    def test_getopt_long(self):
        if self.emcc_args is None: return self.skip('needs emcc for libc')

        src = '''
          #pragma clang diagnostic ignored "-Winvalid-pp-token"
          #pragma clang diagnostic ignored "-Wdeprecated-writable-strings"
          #include <stdio.h>     /* for printf */
          #include <stdlib.h>    /* for exit */
          #include <getopt.h>

          int
          main(int argc, char **argv)
          {
             int c;
             int digit_optind = 0;

             while (1) {
                 int this_option_optind = optind ? optind : 1;
                 int option_index = 0;
                 static struct option long_options[] = {
                     {"add",     required_argument, 0,  0 },
                     {"append",  no_argument,       0,  0 },
                     {"delete",  required_argument, 0,  0 },
                     {"verbose", no_argument,       0,  0 },
                     {"create",  required_argument, 0, 'c'},
                     {"file",    required_argument, 0,  0 },
                     {0,         0,                 0,  0 }
                 };

                 c = getopt_long(argc, argv, "abc:d:012",
                          long_options, &option_index);
                 if (c == -1)
                     break;

                 switch (c) {
                 case 0:
                     printf("option %s", long_options[option_index].name);
                     if (optarg)
                         printf(" with arg %s", optarg);
                     printf("\\n");
                     break;

                 case '0':
                 case '1':
                 case '2':
                     if (digit_optind != 0 && digit_optind != this_option_optind)
                       printf("digits occur in two different argv-elements.\\n");
                     digit_optind = this_option_optind;
                     printf("option %c\\n", c);
                     break;

                 case 'a':
                     printf("option a\\n");
                     break;

                 case 'b':
                     printf("option b\\n");
                     break;

                 case 'c':
                     printf("option c with value '%s'\\n", optarg);
                     break;

                 case 'd':
                     printf("option d with value '%s'\\n", optarg);
                     break;

                 case '?':
                     break;

                 default:
                     printf("?? getopt returned character code 0%o ??\\n", c);
                 }
             }

             if (optind < argc) {
                 printf("non-option ARGV-elements: ");
                 while (optind < argc)
                     printf("%s ", argv[optind++]);
                 printf("\\n");
             }

             exit(EXIT_SUCCESS);
          }
        '''
        self.do_run(src, 'option file with arg foobar\noption b', args=['--file', 'foobar', '-b'])

    def test_memmove(self):
      src = '''
        #include <stdio.h>
        #include <string.h>
        int main() {
          char str[] = "memmove can be very useful....!";
          memmove (str+20, str+15, 11);
          puts(str);
          return 0;
        }
      '''
      self.do_run(src, 'memmove can be very very useful')

    def test_memmove2(self):
      if Settings.USE_TYPED_ARRAYS != 2: return self.skip('need ta2')

      src = r'''
        #include <stdio.h>
        #include <string.h>
        #include <assert.h>
        int main() {
          int sum = 0;
          char buffer[256];
          for (int i = 0; i < 10; i++) {
            for (int j = 0; j < 10; j++) {
              for (int k = 0; k < 35; k++) {
                for (int t = 0; t < 256; t++) buffer[t] = t;
                char *dest = buffer + i;
                char *src = buffer + j;
                if (dest == src) continue;
                //printf("%d, %d, %d\n", i, j, k);
                assert(memmove(dest, src, k) == dest);
                for (int t = 0; t < 256; t++) sum += buffer[t];
              }
            }
          }
          printf("final: %d.\n", sum);
          return 1;
        }
      '''
      self.do_run(src, 'final: -403200.');

    def test_memmove3(self):
      src = '''
        #include <stdio.h>
        #include <string.h>
        int main() {
          char str[] = "memmove can be vvery useful....!";
          memmove(str+15, str+16, 17);
          puts(str);
          return 0;
        }
      '''
      self.do_run(src, 'memmove can be very useful....!')

    def test_bsearch(self):
      if Settings.QUANTUM_SIZE == 1: return self.skip('Test cannot work with q1')

      src = '''
          #include <stdlib.h>
          #include <stdio.h>

          int cmp(const void* key, const void* member) {
            return *(int *)key - *(int *)member;
          }

          void printResult(int* needle, int* haystack, unsigned int len) {
            void *result = bsearch(needle, haystack, len, sizeof(unsigned int), cmp);

            if (result == NULL) {
              printf("null\\n");
            } else {
              printf("%d\\n", *(unsigned int *)result);
            }
          }

          int main() {
            int a[] = { -2, -1, 0, 6, 7, 9 };
            int b[] = { 0, 1 };

            /* Find all keys that exist. */
            for(int i = 0; i < 6; i++) {
              int val = a[i];

              printResult(&val, a, 6);
            }

            /* Keys that are covered by the range of the array but aren't in
             * the array cannot be found.
             */
            int v1 = 3;
            int v2 = 8;
            printResult(&v1, a, 6);
            printResult(&v2, a, 6);

            /* Keys outside the range of the array cannot be found. */
            int v3 = -1;
            int v4 = 2;

            printResult(&v3, b, 2);
            printResult(&v4, b, 2);

            return 0;
          }
          '''

      self.do_run(src, '-2\n-1\n0\n6\n7\n9\nnull\nnull\nnull\nnull')

    def test_nestedstructs(self):
        src = '''
          #include <stdio.h>
          #include "emscripten.h"

          struct base {
            int x;
            float y;
            union {
              int a;
              float b;
            };
            char c;
          };

          struct hashtableentry {
            int key;
            base data;
          };

          struct hashset {
            typedef hashtableentry entry;
            struct chain { entry elem; chain *next; };
          //  struct chainchunk { chain chains[100]; chainchunk *next; };
          };

          struct hashtable : hashset {
            hashtable() {
              base *b = NULL;
              entry *e = NULL;
              chain *c = NULL;
              printf("*%d,%d,%d,%d,%d,%d|%d,%d,%d,%d,%d,%d,%d,%d|%d,%d,%d,%d,%d,%d,%d,%d,%d,%d*\\n",
                sizeof(base),
                int(&(b->x)), int(&(b->y)), int(&(b->a)), int(&(b->b)), int(&(b->c)), 
                sizeof(hashtableentry),
                int(&(e->key)), int(&(e->data)), int(&(e->data.x)), int(&(e->data.y)), int(&(e->data.a)), int(&(e->data.b)), int(&(e->data.c)), 
                sizeof(hashset::chain),
                int(&(c->elem)), int(&(c->next)), int(&(c->elem.key)), int(&(c->elem.data)), int(&(c->elem.data.x)), int(&(c->elem.data.y)), int(&(c->elem.data.a)), int(&(c->elem.data.b)), int(&(c->elem.data.c))
              );
            }
          };

          struct B { char buffer[62]; int last; char laster; char laster2; };

          struct Bits {
            unsigned short A : 1;
            unsigned short B : 1;
            unsigned short C : 1;
            unsigned short D : 1;
            unsigned short x1 : 1;
            unsigned short x2 : 1;
            unsigned short x3 : 1;
            unsigned short x4 : 1;
          };

          int main() {
            hashtable t;

            // Part 2 - the char[] should be compressed, BUT have a padding space at the end so the next
            // one is aligned properly. Also handle char; char; etc. properly.
            B *b = NULL;
            printf("*%d,%d,%d,%d,%d,%d,%d,%d,%d*\\n", int(b), int(&(b->buffer)), int(&(b->buffer[0])), int(&(b->buffer[1])), int(&(b->buffer[2])),
                                                      int(&(b->last)), int(&(b->laster)), int(&(b->laster2)), sizeof(B));

            // Part 3 - bitfields, and small structures
            Bits *b2 = NULL;
            printf("*%d*\\n", sizeof(Bits));

            return 0;
          }
          '''
        if Settings.QUANTUM_SIZE == 1:
          # Compressed memory. Note that sizeof() does give the fat sizes, however!
          self.do_run(src, '*16,0,1,2,2,3|20,0,1,1,2,3,3,4|24,0,5,0,1,1,2,3,3,4*\n*0,0,0,1,2,62,63,64,72*\n*2*')
        else:
          # Bloated memory; same layout as C/C++
          self.do_run(src, '*16,0,4,8,8,12|20,0,4,4,8,12,12,16|24,0,20,0,4,4,8,12,12,16*\n*0,0,0,1,2,64,68,69,72*\n*2*')

    def test_runtimelink(self):
      if Building.LLVM_OPTS: return self.skip('LLVM opts will optimize printf into puts in the parent, and the child will still look for puts')
      if Settings.ASM_JS: return self.skip('asm does not support runtime linking')

      main, supp = self.setup_runtimelink_test()

      self.banned_js_engines = [NODE_JS] # node's global scope behaves differently than everything else, needs investigation FIXME
      Settings.LINKABLE = 1
      Settings.BUILD_AS_SHARED_LIB = 2
      Settings.NAMED_GLOBALS = 1

      self.build(supp, self.get_dir(), self.in_dir('supp.c'))
      shutil.move(self.in_dir('supp.c.o.js'), self.in_dir('liblib.so'))
      Settings.BUILD_AS_SHARED_LIB = 0

      Settings.RUNTIME_LINKED_LIBS = ['liblib.so'];
      self.do_run(main, 'supp: 54,2\nmain: 56\nsupp see: 543\nmain see: 76\nok.')

    def test_dlfcn_basic(self):
      if Settings.ASM_JS: return self.skip('TODO: dlopen in asm')

      Settings.NAMED_GLOBALS = 1
      Settings.LINKABLE = 1

      lib_src = '''
        #include <cstdio>

        class Foo {
        public:
          Foo() {
            printf("Constructing lib object.\\n");
          }
        };

        Foo global;
        '''
      dirname = self.get_dir()
      filename = os.path.join(dirname, 'liblib.cpp')
      Settings.BUILD_AS_SHARED_LIB = 1
      self.build(lib_src, dirname, filename)
      shutil.move(filename + '.o.js', os.path.join(dirname, 'liblib.so'))

      src = '''
        #include <cstdio>
        #include <dlfcn.h>

        class Bar {
        public:
          Bar() {
            printf("Constructing main object.\\n");
          }
        };

        Bar global;

        int main() {
          dlopen("liblib.so", RTLD_NOW);
          return 0;
        }
        '''
      Settings.BUILD_AS_SHARED_LIB = 0
      add_pre_run_and_checks = '''
def process(filename):
  src = open(filename, 'r').read().replace(
    '// {{PRE_RUN_ADDITIONS}}',
    "FS.createLazyFile('/', 'liblib.so', 'liblib.so', true, false);"
  )
  open(filename, 'w').write(src)
'''
      self.do_run(src, 'Constructing main object.\nConstructing lib object.\n',
                  post_build=add_pre_run_and_checks)

    def test_dlfcn_qsort(self):
      if self.emcc_args is None: return self.skip('requires emcc')
      if Settings.ASM_JS: return self.skip('TODO: dlopen in asm')

      Settings.LINKABLE = 1
      Settings.NAMED_GLOBALS = 1

      if Settings.USE_TYPED_ARRAYS == 2:
        Settings.CORRECT_SIGNS = 1 # Needed for unsafe optimizations

      lib_src = '''
        int lib_cmp(const void* left, const void* right) {
          const int* a = (const int*) left;
          const int* b = (const int*) right;
          if(*a > *b) return 1;
          else if(*a == *b) return  0;
          else return -1;
        }

        typedef int (*CMP_TYPE)(const void*, const void*);

        extern "C" CMP_TYPE get_cmp() {
          return lib_cmp;
        }
        '''
      dirname = self.get_dir()
      filename = os.path.join(dirname, 'liblib.cpp')
      Settings.BUILD_AS_SHARED_LIB = 1
      Settings.EXPORTED_FUNCTIONS = ['_get_cmp']
      self.build(lib_src, dirname, filename)
      shutil.move(filename + '.o.js', os.path.join(dirname, 'liblib.so'))

      src = '''
        #include <stdio.h>
        #include <stdlib.h>
        #include <dlfcn.h>

        typedef int (*CMP_TYPE)(const void*, const void*);

        int main_cmp(const void* left, const void* right) {
          const int* a = (const int*) left;
          const int* b = (const int*) right;
          if(*a < *b) return 1;
          else if(*a == *b) return  0;
          else return -1;
        }

        int main() {
          void* lib_handle;
          CMP_TYPE (*getter_ptr)();
          CMP_TYPE lib_cmp_ptr;
          int arr[5] = {4, 2, 5, 1, 3};

          lib_handle = dlopen("liblib.so", RTLD_NOW);
          if (lib_handle == NULL) {
            printf("Could not load lib.\\n");
            return 1;
          }
          getter_ptr = (CMP_TYPE (*)()) dlsym(lib_handle, "get_cmp");
          if (getter_ptr == NULL) {
            printf("Could not find func.\\n");
            return 1;
          }
          lib_cmp_ptr = getter_ptr();

          qsort((void*)arr, 5, sizeof(int), main_cmp);
          printf("Sort with main comparison: ");
          for (int i = 0; i < 5; i++) {
            printf("%d ", arr[i]);
          }
          printf("\\n");

          qsort((void*)arr, 5, sizeof(int), lib_cmp_ptr);
          printf("Sort with lib comparison: ");
          for (int i = 0; i < 5; i++) {
            printf("%d ", arr[i]);
          }
          printf("\\n");

          return 0;
        }
        '''
      Settings.BUILD_AS_SHARED_LIB = 0
      Settings.EXPORTED_FUNCTIONS = ['_main']
      add_pre_run_and_checks = '''
def process(filename):
  src = open(filename, 'r').read().replace(
    '// {{PRE_RUN_ADDITIONS}}',
    "FS.createLazyFile('/', 'liblib.so', 'liblib.so', true, false);"
  )
  open(filename, 'w').write(src)
'''
      self.do_run(src, 'Sort with main comparison: 5 4 3 2 1 *Sort with lib comparison: 1 2 3 4 5 *',
                  output_nicerizer=lambda x, err: x.replace('\n', '*'),
                  post_build=add_pre_run_and_checks)

    def test_dlfcn_data_and_fptr(self):
      if Settings.ASM_JS: return self.skip('TODO: dlopen in asm')
      if Building.LLVM_OPTS: return self.skip('LLVM opts will optimize out parent_func')

      Settings.LINKABLE = 1
      Settings.NAMED_GLOBALS = 1

      lib_src = '''
        #include <stdio.h>

        int global = 42;

        extern void parent_func(); // a function that is defined in the parent

        void lib_fptr() {
          printf("Second calling lib_fptr from main.\\n");
          parent_func();
          // call it also through a pointer, to check indexizing
          void (*p_f)();
          p_f = parent_func;
          p_f();
        }

        extern "C" void (*func(int x, void(*fptr)()))() {
          printf("In func: %d\\n", x);
          fptr();
          return lib_fptr;
        }
        '''
      dirname = self.get_dir()
      filename = os.path.join(dirname, 'liblib.cpp')
      Settings.BUILD_AS_SHARED_LIB = 1
      Settings.EXPORTED_FUNCTIONS = ['_func']
      Settings.EXPORTED_GLOBALS = ['_global']
      self.build(lib_src, dirname, filename)
      shutil.move(filename + '.o.js', os.path.join(dirname, 'liblib.so'))

      src = '''
        #include <stdio.h>
        #include <dlfcn.h>

        typedef void (*FUNCTYPE(int, void(*)()))();

        FUNCTYPE func;

        void parent_func() {
          printf("parent_func called from child\\n");
        }

        void main_fptr() {
          printf("First calling main_fptr from lib.\\n");
        }

        int main() {
          void* lib_handle;
          FUNCTYPE* func_fptr;

          // Test basic lib loading.
          lib_handle = dlopen("liblib.so", RTLD_NOW);
          if (lib_handle == NULL) {
            printf("Could not load lib.\\n");
            return 1;
          }

          // Test looked up function.
          func_fptr = (FUNCTYPE*) dlsym(lib_handle, "func");
          // Load twice to test cache.
          func_fptr = (FUNCTYPE*) dlsym(lib_handle, "func");
          if (func_fptr == NULL) {
            printf("Could not find func.\\n");
            return 1;
          }

          // Test passing function pointers across module bounds.
          void (*fptr)() = func_fptr(13, main_fptr);
          fptr();

          // Test global data.
          int* global = (int*) dlsym(lib_handle, "global");
          if (global == NULL) {
            printf("Could not find global.\\n");
            return 1;
          }

          printf("Var: %d\\n", *global);

          return 0;
        }
        '''
      Settings.BUILD_AS_SHARED_LIB = 0
      Settings.EXPORTED_FUNCTIONS = ['_main']
      Settings.EXPORTED_GLOBALS = []
      add_pre_run_and_checks = '''
def process(filename):
  src = open(filename, 'r').read().replace(
    '// {{PRE_RUN_ADDITIONS}}',
    "FS.createLazyFile('/', 'liblib.so', 'liblib.so', true, false);"
  )
  open(filename, 'w').write(src)
'''
      self.do_run(src, 'In func: 13*First calling main_fptr from lib.*Second calling lib_fptr from main.*parent_func called from child*parent_func called from child*Var: 42*',
                   output_nicerizer=lambda x, err: x.replace('\n', '*'),
                   post_build=add_pre_run_and_checks)

    def test_dlfcn_alias(self):
      if Settings.ASM_JS: return self.skip('TODO: dlopen in asm')

      Settings.LINKABLE = 1
      Settings.NAMED_GLOBALS = 1

      if Building.LLVM_OPTS == 2: return self.skip('LLVM LTO will optimize away stuff we expect from the shared library')

      lib_src = r'''
        #include <stdio.h>
        extern int parent_global;
        extern "C" void func() {
          printf("Parent global: %d.\n", parent_global);
        }
        '''
      dirname = self.get_dir()
      filename = os.path.join(dirname, 'liblib.cpp')
      Settings.BUILD_AS_SHARED_LIB = 1
      Settings.EXPORTED_FUNCTIONS = ['_func']
      self.build(lib_src, dirname, filename)
      shutil.move(filename + '.o.js', os.path.join(dirname, 'liblib.so'))

      src = r'''
        #include <dlfcn.h>

        int parent_global = 123;

        int main() {
          void* lib_handle;
          void (*fptr)();

          lib_handle = dlopen("liblib.so", RTLD_NOW);
          fptr = (void (*)())dlsym(lib_handle, "func");
          fptr();
          parent_global = 456;
          fptr();

          return 0;
        }
        '''
      Settings.BUILD_AS_SHARED_LIB = 0
      Settings.INCLUDE_FULL_LIBRARY = 1
      Settings.EXPORTED_FUNCTIONS = ['_main']
      add_pre_run_and_checks = '''
def process(filename):
  src = open(filename, 'r').read().replace(
    '// {{PRE_RUN_ADDITIONS}}',
    "FS.createLazyFile('/', 'liblib.so', 'liblib.so', true, false);"
  )
  open(filename, 'w').write(src)
'''
      self.do_run(src, 'Parent global: 123.*Parent global: 456.*',
                  output_nicerizer=lambda x, err: x.replace('\n', '*'),
                  post_build=add_pre_run_and_checks,
                  extra_emscripten_args=['-H', 'libc/fcntl.h,libc/sys/unistd.h,poll.h,libc/math.h,libc/time.h,libc/langinfo.h'])
      Settings.INCLUDE_FULL_LIBRARY = 0

    def test_dlfcn_varargs(self):
      if Settings.ASM_JS: return self.skip('TODO: dlopen in asm')

      Settings.LINKABLE = 1
      Settings.NAMED_GLOBALS = 1

      if Building.LLVM_OPTS == 2: return self.skip('LLVM LTO will optimize things that prevent shared objects from working')
      if Settings.QUANTUM_SIZE == 1: return self.skip('FIXME: Add support for this')

      lib_src = r'''
        void print_ints(int n, ...);
        extern "C" void func() {
          print_ints(2, 13, 42);
        }
        '''
      dirname = self.get_dir()
      filename = os.path.join(dirname, 'liblib.cpp')
      Settings.BUILD_AS_SHARED_LIB = 1
      Settings.EXPORTED_FUNCTIONS = ['_func']
      self.build(lib_src, dirname, filename)
      shutil.move(filename + '.o.js', os.path.join(dirname, 'liblib.so'))

      src = r'''
        #include <stdarg.h>
        #include <stdio.h>
        #include <dlfcn.h>

        void print_ints(int n, ...) {
          va_list args;
          va_start(args, n);
          for (int i = 0; i < n; i++) {
            printf("%d\n", va_arg(args, int));
          }
          va_end(args);
        }

        int main() {
          void* lib_handle;
          void (*fptr)();

          print_ints(2, 100, 200);

          lib_handle = dlopen("liblib.so", RTLD_NOW);
          fptr = (void (*)())dlsym(lib_handle, "func");
          fptr();

          return 0;
        }
        '''
      Settings.BUILD_AS_SHARED_LIB = 0
      Settings.EXPORTED_FUNCTIONS = ['_main']
      add_pre_run_and_checks = '''
def process(filename):
  src = open(filename, 'r').read().replace(
    '// {{PRE_RUN_ADDITIONS}}',
    "FS.createLazyFile('/', 'liblib.so', 'liblib.so', true, false);"
  )
  open(filename, 'w').write(src)
'''
      self.do_run(src, '100\n200\n13\n42\n',
                  post_build=add_pre_run_and_checks)

    def test_rand(self):
      return self.skip('rand() is now random') # FIXME

      src = r'''
        #include <stdio.h>
        #include <stdlib.h>

        int main() {
          printf("%d\n", rand());
          printf("%d\n", rand());

          srand(123);
          printf("%d\n", rand());
          printf("%d\n", rand());
          srand(123);
          printf("%d\n", rand());
          printf("%d\n", rand());

          unsigned state = 0;
          int r;
          r = rand_r(&state);
          printf("%d, %u\n", r, state);
          r = rand_r(&state);
          printf("%d, %u\n", r, state);
          state = 0;
          r = rand_r(&state);
          printf("%d, %u\n", r, state);

          return 0;
        }
        '''
      expected = '''
        1250496027
        1116302336
        440917656
        1476150784
        440917656
        1476150784
        12345, 12345
        1406932606, 3554416254
        12345, 12345
        '''
      self.do_run(src, re.sub(r'(^|\n)\s+', r'\1', expected))

    def test_strtod(self):
      if self.emcc_args is None: return self.skip('needs emcc for libc')

      src = r'''
        #include <stdio.h>
        #include <stdlib.h>

        int main() {
          char* endptr;

          printf("\n");
          printf("%g\n", strtod("0", &endptr));
          printf("%g\n", strtod("0.", &endptr));
          printf("%g\n", strtod("0.0", &endptr));
          printf("%g\n", strtod("-0.0", &endptr));
          printf("%g\n", strtod("1", &endptr));
          printf("%g\n", strtod("1.", &endptr));
          printf("%g\n", strtod("1.0", &endptr));
          printf("%g\n", strtod("z1.0", &endptr));
          printf("%g\n", strtod("0.5", &endptr));
          printf("%g\n", strtod(".5", &endptr));
          printf("%g\n", strtod(".a5", &endptr));
          printf("%g\n", strtod("123", &endptr));
          printf("%g\n", strtod("123.456", &endptr));
          printf("%g\n", strtod("-123.456", &endptr));
          printf("%g\n", strtod("1234567891234567890", &endptr));
          printf("%g\n", strtod("1234567891234567890e+50", &endptr));
          printf("%g\n", strtod("84e+220", &endptr));
          printf("%g\n", strtod("123e-50", &endptr));
          printf("%g\n", strtod("123e-250", &endptr));
          printf("%g\n", strtod("123e-450", &endptr));

          char str[] = "  12.34e56end";
          printf("%g\n", strtod(str, &endptr));
          printf("%d\n", endptr - str);
          printf("%g\n", strtod("84e+420", &endptr));

          printf("%.12f\n", strtod("1.2345678900000000e+08", NULL));

          return 0;
        }
        '''
      expected = '''
        0
        0
        0
        -0
        1
        1
        1
        0
        0.5
        0.5
        0
        123
        123.456
        -123.456
        1.23457e+18
        1.23457e+68
        8.4e+221
        1.23e-48
        1.23e-248
        0
        1.234e+57
        10
        inf
        123456789.000000000000
        '''

      self.do_run(src, re.sub(r'\n\s+', '\n', expected))
      self.do_run(src.replace('strtod', 'strtold'), re.sub(r'\n\s+', '\n', expected)) # XXX add real support for long double

    def test_strtok(self):
      src = r'''
        #include<stdio.h>
        #include<string.h>

        int main() {
          char test[80], blah[80];
          char *sep = "\\/:;=-";
          char *word, *phrase, *brkt, *brkb;

          strcpy(test, "This;is.a:test:of=the/string\\tokenizer-function.");

          for (word = strtok_r(test, sep, &brkt); word; word = strtok_r(NULL, sep, &brkt)) {
            strcpy(blah, "blah:blat:blab:blag");
            for (phrase = strtok_r(blah, sep, &brkb); phrase; phrase = strtok_r(NULL, sep, &brkb)) {
              printf("at %s:%s\n", word, phrase);
            }
          }
          return 0;
        }
      '''

      expected = '''at This:blah
at This:blat
at This:blab
at This:blag
at is.a:blah
at is.a:blat
at is.a:blab
at is.a:blag
at test:blah
at test:blat
at test:blab
at test:blag
at of:blah
at of:blat
at of:blab
at of:blag
at the:blah
at the:blat
at the:blab
at the:blag
at string:blah
at string:blat
at string:blab
at string:blag
at tokenizer:blah
at tokenizer:blat
at tokenizer:blab
at tokenizer:blag
at function.:blah
at function.:blat
at function.:blab
at function.:blag
'''
      self.do_run(src, expected)

    def test_parseInt(self):
      if Settings.USE_TYPED_ARRAYS != 2: return self.skip('i64 mode 1 requires ta2')
      if Settings.QUANTUM_SIZE == 1: return self.skip('Q1 and I64_1 do not mix well yet')
      src = open(path_from_root('tests', 'parseInt', 'src.c'), 'r').read()
      expected = open(path_from_root('tests', 'parseInt', 'output.txt'), 'r').read()
      self.do_run(src, expected)
      
    def test_transtrcase(self):
      src = '''
        #include <stdio.h>
        #include <string.h>
        int main()  {
          char szToupr[] = "hello, ";
          char szTolwr[] = "EMSCRIPTEN";
          strupr(szToupr);
          strlwr(szTolwr);
          printf(szToupr);
          printf(szTolwr);
          return 0;
        }
        '''
      self.do_run(src, 'HELLO, emscripten')

    def test_printf(self):
      if Settings.USE_TYPED_ARRAYS != 2: return self.skip('i64 mode 1 requires ta2')
      self.banned_js_engines = [NODE_JS, V8_ENGINE] # SpiderMonkey and V8 do different things to float64 typed arrays, un-NaNing, etc.
      src = open(path_from_root('tests', 'printf', 'test.c'), 'r').read()
      expected = [open(path_from_root('tests', 'printf', 'output.txt'), 'r').read(),
                  open(path_from_root('tests', 'printf', 'output_i64_1.txt'), 'r').read()]
      self.do_run(src, expected)

    def test_printf_types(self):
      src = r'''
        #include <stdio.h>

        int main() {
          char c = '1';
          short s = 2;
          int i = 3;
          long long l = 4;
          float f = 5.5;
          double d = 6.6;

          printf("%c,%hd,%d,%lld,%.1f,%.1llf\n", c, s, i, l, f, d);

          return 0;
        }
        '''
      self.do_run(src, '1,2,3,4,5.5,6.6\n')

    def test_vprintf(self):
      src = r'''
        #include <stdio.h>
        #include <stdarg.h>

        void print(char* format, ...) {
          va_list args;
          va_start (args, format);
          vprintf (format, args);
          va_end (args);
        }

        int main () {
           print("Call with %d variable argument.\n", 1);
           print("Call with %d variable %s.\n", 2, "arguments");

           return 0;
        }
        '''
      expected = '''
        Call with 1 variable argument.
        Call with 2 variable arguments.
        '''
      self.do_run(src, re.sub('(^|\n)\s+', '\\1', expected))

    def test_vsnprintf(self):
      if self.emcc_args is None: return self.skip('needs i64 math')

      src = r'''
        #include <stdio.h>
        #include <stdarg.h>
        #include <stdint.h>

        void printy(const char *f, ...)
        {
          char buffer[256];
          va_list args;
          va_start(args, f);
          vsnprintf(buffer, 256, f, args);
          puts(buffer);
          va_end(args);
        }

        int main(int argc, char **argv) {
          int64_t x = argc - 1;
          int64_t y = argc - 1 + 0x400000;
          if (x % 3 == 2) y *= 2;

          printy("0x%llx_0x%llx", x, y);
          printy("0x%llx_0x%llx", x, x);
          printy("0x%llx_0x%llx", y, x);
          printy("0x%llx_0x%llx", y, y);

          {
            uint64_t A = 0x800000;
            uint64_t B = 0x800000000000ULL;
            printy("0x%llx_0x%llx", A, B);
          }
          {
            uint64_t A = 0x800;
            uint64_t B = 0x12340000000000ULL;
            printy("0x%llx_0x%llx", A, B);
          }
          {
            uint64_t A = 0x000009182746756;
            uint64_t B = 0x192837465631ACBDULL;
            printy("0x%llx_0x%llx", A, B);
          }

          return 0;
        }
      '''
      self.do_run(src, '''0x0_0x400000
0x0_0x0
0x400000_0x0
0x400000_0x400000
0x800000_0x800000000000
0x800_0x12340000000000
0x9182746756_0x192837465631acbd
''')

    def test_printf_more(self):
      src = r'''
        #include <stdio.h>
        int main()  {
          int size = snprintf(NULL, 0, "%s %d %.2f\n", "me and myself", 25, 1.345);
          char buf[size];
          snprintf(buf, size, "%s %d %.2f\n", "me and myself", 25, 1.345);
          printf("%d : %s\n", size, buf);
          char *buff = NULL;
          asprintf(&buff, "%d waka %d\n", 21, 95);
          puts(buff);
          return 0;
        }
        '''
      self.do_run(src, '22 : me and myself 25 1.34\n21 waka 95\n')
      
    def test_perrar(self):
      src = r'''
        #include <sys/types.h>
        #include <sys/stat.h>
        #include <fcntl.h>
        #include <stdio.h>

        int main( int argc, char** argv ){
          int retval = open( "NonExistingFile", O_RDONLY );
          if( retval == -1 )
          perror( "Cannot open NonExistingFile" );
          return 0;
        }
        '''
      self.do_run(src, 'Cannot open NonExistingFile: No such file or directory\n')

    def test_atoX(self):
      if self.emcc_args is None: return self.skip('requires ta2')

      src = r'''
        #include <stdio.h>
        #include <stdlib.h>

        int main () {
          printf("%d*", atoi(""));
          printf("%d*", atoi("a"));
          printf("%d*", atoi(" b"));
          printf("%d*", atoi(" c "));
          printf("%d*", atoi("6"));
          printf("%d*", atoi(" 5"));
          printf("%d*", atoi("4 "));
          printf("%d*", atoi("3 6"));
          printf("%d*", atoi(" 3 7"));
          printf("%d*", atoi("9 d"));
          printf("%d\n", atoi(" 8 e"));
          printf("%d*", atol(""));
          printf("%d*", atol("a"));
          printf("%d*", atol(" b"));
          printf("%d*", atol(" c "));
          printf("%d*", atol("6"));
          printf("%d*", atol(" 5"));
          printf("%d*", atol("4 "));
          printf("%d*", atol("3 6"));
          printf("%d*", atol(" 3 7"));
          printf("%d*", atol("9 d"));
          printf("%d\n", atol(" 8 e"));
          printf("%lld*", atoll("6294967296"));
          printf("%lld*", atoll(""));
          printf("%lld*", atoll("a"));
          printf("%lld*", atoll(" b"));
          printf("%lld*", atoll(" c "));
          printf("%lld*", atoll("6"));
          printf("%lld*", atoll(" 5"));
          printf("%lld*", atoll("4 "));
          printf("%lld*", atoll("3 6"));
          printf("%lld*", atoll(" 3 7"));
          printf("%lld*", atoll("9 d"));
          printf("%lld\n", atoll(" 8 e"));
          return 0;
        }
        '''
      self.do_run(src, '0*0*0*0*6*5*4*3*3*9*8\n0*0*0*0*6*5*4*3*3*9*8\n6294967296*0*0*0*0*6*5*4*3*3*9*8\n')

    def test_strstr(self):
      src = r'''
        #include <stdio.h>
        #include <string.h>

        int main()
        {
          printf("%d\n", !!strstr("\\n", "\\n"));
          printf("%d\n", !!strstr("cheezy", "ez"));
          printf("%d\n", !!strstr("cheeezy", "ez"));
          printf("%d\n", !!strstr("cheeeeeeeeeezy", "ez"));
          printf("%d\n", !!strstr("cheeeeeeeeee1zy", "ez"));
          printf("%d\n", !!strstr("che1ezy", "ez"));
          printf("%d\n", !!strstr("che1ezy", "che"));
          printf("%d\n", !!strstr("ce1ezy", "che"));
          printf("%d\n", !!strstr("ce1ezy", "ezy"));
          printf("%d\n", !!strstr("ce1ezyt", "ezy"));
          printf("%d\n", !!strstr("ce1ez1y", "ezy"));
          printf("%d\n", !!strstr("cheezy", "a"));
          printf("%d\n", !!strstr("cheezy", "b"));
          printf("%d\n", !!strstr("cheezy", "c"));
          printf("%d\n", !!strstr("cheezy", "d"));
          printf("%d\n", !!strstr("cheezy", "g"));
          printf("%d\n", !!strstr("cheezy", "h"));
          printf("%d\n", !!strstr("cheezy", "i"));
          printf("%d\n", !!strstr("cheezy", "e"));
          printf("%d\n", !!strstr("cheezy", "x"));
          printf("%d\n", !!strstr("cheezy", "y"));
          printf("%d\n", !!strstr("cheezy", "z"));
          printf("%d\n", !!strstr("cheezy", "_"));

          const char *str = "a big string";
          printf("%d\n", strstr(str, "big") - str);
          return 0;
        }
      '''
      self.do_run(src, '''1
1
1
1
0
1
1
0
1
1
0
0
0
1
0
0
1
0
1
0
1
1
0
2
''')

    def test_sscanf(self):
      if self.emcc_args is None: return self.skip('needs emcc for libc')

      src = r'''
        #include <stdio.h>
        #include <string.h>
        #include <stdlib.h>

        int main () {
          #define CHECK(str) \
          { \
            char name[1000]; \
            memset(name, 0, 1000); \
            int prio = 99; \
            sscanf(str, "%s %d", name, &prio); \
            printf("%s : %d\n", name, prio); \
          }
          CHECK("en-us 2");
          CHECK("en-r");
          CHECK("en 3");

          printf("%f, %f\n", atof("1.234567"), atof("cheez"));

          char float_formats[] = "fegE";
          char format[] = "%_";
          for(int i = 0; i < 4; ++i) {
            format[1] = float_formats[i];

            float n = -1;
            sscanf(" 2.8208", format, &n);
            printf("%.4f\n", n);

            float a = -1;
            sscanf("-3.03", format, &a);
            printf("%.4f\n", a);
          }

          char buffy[100];
          sscanf("cheez some thing moar 123\nyet more\n", "cheez %s", buffy);
          printf("|%s|\n", buffy);
          sscanf("cheez something\nmoar 123\nyet more\n", "cheez %s", buffy);
          printf("|%s|\n", buffy);
          sscanf("cheez somethingmoar\tyet more\n", "cheez %s", buffy);
          printf("|%s|\n", buffy);

          int numverts = -1;
          printf("%d\n", sscanf("	numverts 1499\n", " numverts %d", &numverts)); // white space is the same, even if tab vs space
          printf("%d\n", numverts);

          int index;
          float u, v;
          short start, count;
          printf("%d\n", sscanf("	vert 87 ( 0.481565 0.059481 ) 0 1\n", " vert %d ( %f %f ) %hu %hu", &index, &u, &v, &start, &count));
          printf("%d,%.6f,%.6f,%hu,%hu\n", index, u, v, start, count);

          int neg, neg2, neg3 = 0;
          printf("%d\n", sscanf("-123 -765 -34-6", "%d %u %d", &neg, &neg2, &neg3));
          printf("%d,%u,%d\n", neg, neg2, neg3);

          {
            int a = 0;
            sscanf("1", "%i", &a);
            printf("%i\n", a);
          }

          return 0;
        }
        '''
      self.do_run(src, 'en-us : 2\nen-r : 99\nen : 3\n1.234567, 0.000000\n2.8208\n-3.0300\n2.8208\n-3.0300\n2.8208\n-3.0300\n2.8208\n-3.0300\n|some|\n|something|\n|somethingmoar|\n' +
                       '1\n1499\n' +
                       '5\n87,0.481565,0.059481,0,1\n' +
                       '3\n-123,4294966531,-34\n' +
                       '1\n')

    def test_sscanf_2(self):
      # doubles
      if Settings.USE_TYPED_ARRAYS == 2:
        for ftype in ['float', 'double']:
          src = r'''
            #include <stdio.h>

            int main(){
                char strval1[] = "1.2345678901";
                char strval2[] = "1.23456789e5";
                char strval3[] = "1.23456789E5";
                char strval4[] = "1.2345678e-5";
                char strval5[] = "1.2345678E-5";
                double dblval = 1.2345678901;
                double tstval;

                sscanf(strval1, "%lf", &tstval);
                if(dblval != tstval) printf("FAIL: Values are not equal: %lf %lf\n", dblval, tstval);
                else printf("Pass: %lf %lf\n", tstval, dblval);

                sscanf(strval2, "%lf", &tstval);
                dblval = 123456.789;
                if(dblval != tstval) printf("FAIL: Values are not equal: %lf %lf\n", dblval, tstval);
                else printf("Pass: %lf %lf\n", tstval, dblval);

                sscanf(strval3, "%lf", &tstval);
                dblval = 123456.789;
                if(dblval != tstval) printf("FAIL: Values are not equal: %lf %lf\n", dblval, tstval);
                else printf("Pass: %lf %lf\n", tstval, dblval);

                sscanf(strval4, "%lf", &tstval);
                dblval = 0.000012345678;
                if(dblval != tstval) printf("FAIL: Values are not equal: %lf %lf\n", dblval, tstval);
                else printf("Pass: %lf %lf\n", tstval, dblval);

                sscanf(strval5, "%lf", &tstval);
                dblval = 0.000012345678;
                if(dblval != tstval) printf("FAIL: Values are not equal: %lf %lf\n", dblval, tstval);
                else printf("Pass: %lf %lf\n", tstval, dblval);

                return 0;
            }
          '''
          if ftype == 'float':
            self.do_run(src.replace('%lf', '%f').replace('double', 'float'), '''Pass: 1.234568 1.234568
Pass: 123456.789063 123456.789063
Pass: 123456.789063 123456.789063
Pass: 0.000012 0.000012
Pass: 0.000012 0.000012''')
          else:
            self.do_run(src, '''Pass: 1.234568 1.234568
Pass: 123456.789000 123456.789000
Pass: 123456.789000 123456.789000
Pass: 0.000012 0.000012
Pass: 0.000012 0.000012''')

    def test_sscanf_n(self):
      src = r'''
        #include<stdio.h>
        int main() {
          char *line = "version 1.0";
          int i, l, lineno;
          char word[80];
          if (sscanf(line, "%s%n", word, &l) != 1) {
              printf("Header format error, line %d\n", lineno);
          }
          printf("[DEBUG] word 1: %s, l: %d\n", word, l);

          int x = sscanf("one %n two", "%s %n", word, &l);
          printf("%d,%s,%d\n", x, word, l);
          {
            int a, b, c, count;
            count = sscanf("12345 6789", "%d %n%d", &a, &b, &c);
            printf("%i %i %i %i\n", count, a, b, c);
          }
          return 0;
        }
      '''
      self.do_run(src, '''[DEBUG] word 1: version, l: 7\n1,one,4\n2 12345 6 6789\n''')

    def test_sscanf_whitespace(self):
      src = r'''
        #include<stdio.h>

        int main() {
          short int x;
          short int y;

          const char* buffer[] = {
            "173,16",
            "    16,173",
            "183,   173",
            "  17,   287",
            " 98,  123,   "
          };

          for (int i=0; i<5; ++i) {
            sscanf(buffer[i], "%hd,%hd", &x, &y);
            printf("%d:%d,%d ", i, x, y);
          }

          return 0;
        }
      '''
      self.do_run(src, '''0:173,16 1:16,173 2:183,173 3:17,287 4:98,123''')      

    def test_sscanf_3(self):
      # i64
      if not Settings.USE_TYPED_ARRAYS == 2: return self.skip('64-bit sscanf only supported in ta2')
      src = r'''
        #include <stdio.h>

        int main(){
            
            int64_t s, m, l;
            printf("%d\n", sscanf("123 1073741823 1125899906842620", "%lld %lld %lld", &s, &m, &l));
            printf("%lld,%lld,%lld\n", s, m, l);
   
            int64_t negS, negM, negL;
            printf("%d\n", sscanf("-123 -1073741823 -1125899906842620", "%lld %lld %lld", &negS, &negM, &negL));
            printf("%lld,%lld,%lld\n", negS, negM, negL);

            return 0;
        }
      '''
      
      self.do_run(src, '3\n123,1073741823,1125899906842620\n' + 
                     '3\n-123,-1073741823,-1125899906842620\n')

    def test_sscanf_4(self):
      src = r'''
        #include <stdio.h>

        int main()
        {
          char pYear[16], pMonth[16], pDay[16], pDate[64];
          printf("%d\n", sscanf("Nov 19 2012", "%s%s%s", pMonth, pDay, pYear));
          printf("day %s, month %s, year %s \n", pDay, pMonth, pYear);
          return(0);
        }
      '''
      self.do_run(src, '3\nday 19, month Nov, year 2012');

    def test_sscanf_5(self):
      src = r'''
        #include "stdio.h"

        static const char *colors[] = {
          "  c black",
          ". c #001100",
          "X c #111100"
        };

        int main(){
          unsigned char code;
          char color[32];
          int rcode;
          for(int i = 0; i < 3; i++) {
            rcode = sscanf(colors[i], "%c c %s", &code, color);
            printf("%i, %c, %s\n", rcode, code, color);
          }
        }
      '''
      self.do_run(src, '2,  , black\n2, ., #001100\n2, X, #111100');

    def test_langinfo(self):
      src = open(path_from_root('tests', 'langinfo', 'test.c'), 'r').read()
      expected = open(path_from_root('tests', 'langinfo', 'output.txt'), 'r').read()
      self.do_run(src, expected, extra_emscripten_args=['-H', 'libc/langinfo.h'])

    def test_files(self):
      if self.emcc_args is not None and '-O2' in self.emcc_args:
        self.emcc_args += ['--closure', '1'] # Use closure here, to test we don't break FS stuff

      Settings.CORRECT_SIGNS = 1 # Just so our output is what we expect. Can flip them both.
      post = '''
def process(filename):
  src = \'\'\'
    var Module = {
      'noFSInit': true,
      'preRun': function() {
        FS.createLazyFile('/', 'test.file', 'test.file', true, false);
        // Test FS_* exporting
        Module['FS_createDataFile']('/', 'somefile.binary', [100, 200, 50, 25, 10, 77, 123], true, false);  // 200 becomes -56, since signed chars are used in memory
        var test_files_input = 'hi there!';
        var test_files_input_index = 0;
        FS.init(function() {
          return test_files_input.charCodeAt(test_files_input_index++) || null;
        });
      }
    };
  \'\'\' + open(filename, 'r').read()
  open(filename, 'w').write(src)
'''
      other = open(os.path.join(self.get_dir(), 'test.file'), 'w')
      other.write('some data');
      other.close()

      src = open(path_from_root('tests', 'files.cpp'), 'r').read()
      self.do_run(src, 'size: 7\ndata: 100,-56,50,25,10,77,123\nloop: 100 -56 50 25 10 77 123 \ninput:hi there!\ntexto\ntexte\n$\n5 : 10,30,20,11,88\nother=some data.\nseeked=me da.\nseeked=ata.\nseeked=ta.\nfscanfed: 10 - hello\nok.\n',
                   post_build=post, extra_emscripten_args=['-H', 'libc/fcntl.h'])

    def test_files_m(self):
      # Test for Module.stdin etc.

      Settings.CORRECT_SIGNS = 1

      post = '''
def process(filename):
  src = \'\'\'
    var data = [10, 20, 40, 30];
    var Module = {
      stdin: function() { return data.pop() || null },
      stdout: function(x) { Module.print('got: ' + x) }
    };
  \'\'\' + open(filename, 'r').read()
  open(filename, 'w').write(src)
'''
      src = r'''
        #include <stdio.h>
        #include <unistd.h>

        int main () {
          char c;
          fprintf(stderr, "isatty? %d,%d,%d\n", isatty(fileno(stdin)), isatty(fileno(stdout)), isatty(fileno(stderr)));
          while ((c = fgetc(stdin)) != EOF) {
            putc(c+5, stdout);
          }
          return 0;
        }
        '''
      self.do_run(src, 'isatty? 0,0,1\ngot: 35\ngot: 45\ngot: 25\ngot: 15\n', post_build=post)

    def test_fwrite_0(self):
      src = r'''
        #include <stdio.h>
        #include <stdlib.h>

        int main ()
        {
            FILE *fh;

            fh = fopen("a.txt", "wb");
            if (!fh) exit(1);
            fclose(fh);

            fh = fopen("a.txt", "rb");
            if (!fh) exit(1);

            char data[] = "foobar";
            size_t written = fwrite(data, 1, sizeof(data), fh);

            printf("written=%zu\n", written);
        }
        '''
      self.do_run(src, 'written=0')

    def test_fgetc_unsigned(self):
      if self.emcc_args is None: return self.skip('requires emcc')
      src = r'''
        #include <stdio.h>
        int main() {
          FILE *file = fopen("file_with_byte_234.txt", "rb");
          int c = fgetc(file);
          printf("*%d\n", c);
        }
      '''
      open('file_with_byte_234.txt', 'wb').write('\xea')
      self.emcc_args += ['--embed-file', 'file_with_byte_234.txt']
      self.do_run(src, '*234\n')

    def test_fgets_eol(self):
      if self.emcc_args is None: return self.skip('requires emcc')
      src = r'''
        #include <stdio.h>
        char buf[32];
        int main()
        {
          char *r = "SUCCESS";
          FILE *f = fopen("eol.txt", "r");
          while (fgets(buf, 32, f) != NULL) {
            if (buf[0] == '\0') {
              r = "FAIL";
              break;
            }
          }
          printf("%s\n", r);
          fclose(f);
          return 0;
        }
      '''
      open('eol.txt', 'wb').write('\n')
      self.emcc_args += ['--embed-file', 'eol.txt']
      self.do_run(src, 'SUCCESS\n')

    def test_folders(self):
      add_pre_run = '''
def process(filename):
  src = open(filename, 'r').read().replace(
    '// {{PRE_RUN_ADDITIONS}}',
    \'\'\'
      FS.createFolder('/', 'test', true, false);
      FS.createPath('/', 'test/hello/world/', true, false);
      FS.createPath('/test', 'goodbye/world/', true, false);
      FS.createPath('/test/goodbye', 'noentry', false, false);
      FS.createDataFile('/test', 'freeforall.ext', 'abc', true, true);
      FS.createDataFile('/test', 'restricted.ext', 'def', false, false);
    \'\'\'
  )
  open(filename, 'w').write(src)
'''
      src = r'''
        #include <stdio.h>
        #include <dirent.h>
        #include <errno.h>

        int main() {
          struct dirent *e;

          // Basic correct behaviour.
          DIR* d = opendir("/test");
          printf("--E: %d\n", errno);
          while ((e = readdir(d))) puts(e->d_name);
          printf("--E: %d\n", errno);

          // Empty folder; tell/seek.
          puts("****");
          d = opendir("/test/hello/world/");
          e = readdir(d);
          puts(e->d_name);
          int pos = telldir(d);
          e = readdir(d);
          puts(e->d_name);
          seekdir(d, pos);
          e = readdir(d);
          puts(e->d_name);

          // Errors.
          puts("****");
          printf("--E: %d\n", errno);
          d = opendir("/test/goodbye/noentry");
          printf("--E: %d, D: %d\n", errno, d);
          d = opendir("/i/dont/exist");
          printf("--E: %d, D: %d\n", errno, d);
          d = opendir("/test/freeforall.ext");
          printf("--E: %d, D: %d\n", errno, d);
          while ((e = readdir(d))) puts(e->d_name);
          printf("--E: %d\n", errno);

          return 0;
        }
        '''
      expected = '''
        --E: 0
        .
        ..
        hello
        goodbye
        freeforall.ext
        restricted.ext
        --E: 0
        ****
        .
        ..
        ..
        ****
        --E: 0
        --E: 13, D: 0
        --E: 2, D: 0
        --E: 20, D: 0
        --E: 9
      '''
      self.do_run(src, re.sub('(^|\n)\s+', '\\1', expected), post_build=add_pre_run)

    def test_stat(self):
      add_pre_run = '''
def process(filename):
  src = open(filename, 'r').read().replace(
    '// {{PRE_RUN_ADDITIONS}}',
    \'\'\'
      var f1 = FS.createFolder('/', 'test', true, true);
      var f2 = FS.createDataFile(f1, 'file', 'abcdef', true, true);
      var f3 = FS.createLink(f1, 'link', 'file', true, true);
      var f4 = FS.createDevice(f1, 'device', function(){}, function(){});
      f1.timestamp = f2.timestamp = f3.timestamp = f4.timestamp = new Date(1200000000000);
    \'\'\'
  )
  open(filename, 'w').write(src)
'''
      src = open(path_from_root('tests', 'stat', 'src.c'), 'r').read()
      expected = open(path_from_root('tests', 'stat', 'output.txt'), 'r').read()
      self.do_run(src, expected, post_build=add_pre_run, extra_emscripten_args=['-H', 'libc/fcntl.h'])

    def test_fcntl(self):
      add_pre_run = '''
def process(filename):
  src = open(filename, 'r').read().replace(
    '// {{PRE_RUN_ADDITIONS}}',
    "FS.createDataFile('/', 'test', 'abcdef', true, true);"
  )
  open(filename, 'w').write(src)
'''
      src = open(path_from_root('tests', 'fcntl', 'src.c'), 'r').read()
      expected = open(path_from_root('tests', 'fcntl', 'output.txt'), 'r').read()
      self.do_run(src, expected, post_build=add_pre_run, extra_emscripten_args=['-H', 'libc/fcntl.h'])

    def test_fcntl_open(self):
      add_pre_run = '''
def process(filename):
  src = open(filename, 'r').read().replace(
    '// {{PRE_RUN_ADDITIONS}}',
    \'\'\'
      FS.createDataFile('/', 'test-file', 'abcdef', true, true);
      FS.createFolder('/', 'test-folder', true, true);
    \'\'\'
  )
  open(filename, 'w').write(src)
'''
      src = open(path_from_root('tests', 'fcntl-open', 'src.c'), 'r').read()
      expected = open(path_from_root('tests', 'fcntl-open', 'output.txt'), 'r').read()
      self.do_run(src, expected, post_build=add_pre_run, extra_emscripten_args=['-H', 'libc/fcntl.h'])

    def test_fcntl_misc(self):
      add_pre_run = '''
def process(filename):
  src = open(filename, 'r').read().replace(
    '// {{PRE_RUN_ADDITIONS}}',
    "FS.createDataFile('/', 'test', 'abcdef', true, true);"
  )
  open(filename, 'w').write(src)
'''
      src = open(path_from_root('tests', 'fcntl-misc', 'src.c'), 'r').read()
      expected = open(path_from_root('tests', 'fcntl-misc', 'output.txt'), 'r').read()
      self.do_run(src, expected, post_build=add_pre_run, extra_emscripten_args=['-H', 'libc/fcntl.h'])

    def test_poll(self):
      add_pre_run = '''
def process(filename):
  src = open(filename, 'r').read().replace(
    '// {{PRE_RUN_ADDITIONS}}',
    \'\'\'
      FS.createDataFile('/', 'file', 'abcdef', true, true);
      FS.createDevice('/', 'device', function() {}, function() {});
    \'\'\'
  )
  open(filename, 'w').write(src)
'''
      src = r'''
        #include <stdio.h>
        #include <errno.h>
        #include <fcntl.h>
        #include <poll.h>

        int main() {
          struct pollfd multi[5];
          multi[0].fd = open("/file", O_RDONLY, 0777);
          multi[1].fd = open("/device", O_RDONLY, 0777);
          multi[2].fd = 123;
          multi[3].fd = open("/file", O_RDONLY, 0777);
          multi[4].fd = open("/file", O_RDONLY, 0777);
          multi[0].events = POLLIN | POLLOUT | POLLNVAL | POLLERR;
          multi[1].events = POLLIN | POLLOUT | POLLNVAL | POLLERR;
          multi[2].events = POLLIN | POLLOUT | POLLNVAL | POLLERR;
          multi[3].events = 0x00;
          multi[4].events = POLLOUT | POLLNVAL | POLLERR;

          printf("ret: %d\n", poll(multi, 5, 123));
          printf("errno: %d\n", errno);
          printf("multi[0].revents: %d\n", multi[0].revents == (POLLIN | POLLOUT));
          printf("multi[1].revents: %d\n", multi[1].revents == (POLLIN | POLLOUT));
          printf("multi[2].revents: %d\n", multi[2].revents == POLLNVAL);
          printf("multi[3].revents: %d\n", multi[3].revents == 0);
          printf("multi[4].revents: %d\n", multi[4].revents == POLLOUT);

          return 0;
        }
        '''
      expected = r'''
        ret: 4
        errno: 0
        multi[0].revents: 1
        multi[1].revents: 1
        multi[2].revents: 1
        multi[3].revents: 1
        multi[4].revents: 1
        '''
      self.do_run(src, re.sub('(^|\n)\s+', '\\1', expected), post_build=add_pre_run, extra_emscripten_args=['-H', 'libc/fcntl.h,poll.h'])

    def test_statvfs(self):
      src = r'''
        #include <stdio.h>
        #include <errno.h>
        #include <sys/statvfs.h>

        int main() {
          struct statvfs s;

          printf("result: %d\n", statvfs("/test", &s));
          printf("errno: %d\n", errno);

          printf("f_bsize: %lu\n", s.f_bsize);
          printf("f_frsize: %lu\n", s.f_frsize);
          printf("f_blocks: %lu\n", s.f_blocks);
          printf("f_bfree: %lu\n", s.f_bfree);
          printf("f_bavail: %lu\n", s.f_bavail);
          printf("f_files: %lu\n", s.f_files);
          printf("f_ffree: %lu\n", s.f_ffree);
          printf("f_favail: %lu\n", s.f_favail);
          printf("f_fsid: %lu\n", s.f_fsid);
          printf("f_flag: %lu\n", s.f_flag);
          printf("f_namemax: %lu\n", s.f_namemax);

          return 0;
        }
        '''
      expected = r'''
        result: 0
        errno: 0
        f_bsize: 4096
        f_frsize: 4096
        f_blocks: 1000000
        f_bfree: 500000
        f_bavail: 500000
        f_files: 10
        f_ffree: 1000000
        f_favail: 1000000
        f_fsid: 42
        f_flag: 2
        f_namemax: 255
        '''
      self.do_run(src, re.sub('(^|\n)\s+', '\\1', expected))

    def test_libgen(self):
      src = r'''
        #include <stdio.h>
        #include <libgen.h>

        int main() {
          char p1[16] = "/usr/lib", p1x[16] = "/usr/lib";
          printf("%s -> ", p1);
          printf("%s : %s\n", dirname(p1x), basename(p1));

          char p2[16] = "/usr", p2x[16] = "/usr";
          printf("%s -> ", p2);
          printf("%s : %s\n", dirname(p2x), basename(p2));

          char p3[16] = "/usr/", p3x[16] = "/usr/";
          printf("%s -> ", p3);
          printf("%s : %s\n", dirname(p3x), basename(p3));

          char p4[16] = "/usr/lib///", p4x[16] = "/usr/lib///";
          printf("%s -> ", p4);
          printf("%s : %s\n", dirname(p4x), basename(p4));

          char p5[16] = "/", p5x[16] = "/";
          printf("%s -> ", p5);
          printf("%s : %s\n", dirname(p5x), basename(p5));

          char p6[16] = "///", p6x[16] = "///";
          printf("%s -> ", p6);
          printf("%s : %s\n", dirname(p6x), basename(p6));

          char p7[16] = "/usr/../lib/..", p7x[16] = "/usr/../lib/..";
          printf("%s -> ", p7);
          printf("%s : %s\n", dirname(p7x), basename(p7));

          char p8[16] = "", p8x[16] = "";
          printf("(empty) -> %s : %s\n", dirname(p8x), basename(p8));

          printf("(null) -> %s : %s\n", dirname(0), basename(0));

          return 0;
        }
        '''
      expected = '''
        /usr/lib -> /usr : lib
        /usr -> / : usr
        /usr/ -> / : usr
        /usr/lib/// -> /usr : lib
        / -> / : /
        /// -> / : /
        /usr/../lib/.. -> /usr/../lib : ..
        (empty) -> . : .
        (null) -> . : .
      '''
      self.do_run(src, re.sub('(^|\n)\s+', '\\1', expected))

    def test_utime(self):
      add_pre_run_and_checks = '''
def process(filename):
  src = open(filename, 'r').read().replace(
    '// {{PRE_RUN_ADDITIONS}}',
    \'\'\'
      var TEST_F1 = FS.createFolder('/', 'writeable', true, true);
      var TEST_F2 = FS.createFolder('/', 'unwriteable', true, false);
    \'\'\'
  ).replace(
    '// {{POST_RUN_ADDITIONS}}',
    \'\'\'
      Module.print('first changed: ' + (TEST_F1.timestamp == 1200000000000));
      Module.print('second changed: ' + (TEST_F2.timestamp == 1200000000000));
    \'\'\'
  )
  open(filename, 'w').write(src)
'''
      src = r'''
        #include <stdio.h>
        #include <errno.h>
        #include <utime.h>

        int main() {
          struct utimbuf t = {1000000000, 1200000000};
          char* writeable = "/writeable";
          char* unwriteable = "/unwriteable";

          utime(writeable, &t);
          printf("writeable errno: %d\n", errno);

          utime(unwriteable, &t);
          printf("unwriteable errno: %d\n", errno);

          return 0;
        }
        '''
      expected = '''
        writeable errno: 0
        unwriteable errno: 1
        first changed: true
        second changed: false
      '''
      self.do_run(src, re.sub('(^|\n)\s+', '\\1', expected), post_build=add_pre_run_and_checks)

    def test_utf(self):
      self.banned_js_engines = [SPIDERMONKEY_ENGINE] # only node handles utf well
      Settings.EXPORTED_FUNCTIONS = ['_main', '_malloc']

      src = r'''
        #include <stdio.h>
        #include <emscripten.h>

        int main() {
          char *c = "μ†ℱ ╋ℯ╳╋";
          printf("%d %d %d %d %s\n", c[0]&0xff, c[1]&0xff, c[2]&0xff, c[3]&0xff, c);
          emscripten_run_script("cheez = _malloc(100);"
                                "Module.writeStringToMemory(\"μ†ℱ ╋ℯ╳╋\", cheez);"
                                "Module.print([Pointer_stringify(cheez), Module.getValue(cheez, 'i8')&0xff, Module.getValue(cheez+1, 'i8')&0xff, Module.getValue(cheez+2, 'i8')&0xff, Module.getValue(cheez+3, 'i8')&0xff, ]);");
        }
      '''
      self.do_run(src, '206 188 226 128 μ†ℱ ╋ℯ╳╋\nμ†ℱ ╋ℯ╳╋,206,188,226,128\n');

    def test_direct_string_constant_usage(self):
      if self.emcc_args is None: return self.skip('requires libcxx')

      src = '''
        #include <iostream>
        template<int i>
        void printText( const char (&text)[ i ] )
        {
           std::cout << text;
        }
        int main()
        {
          printText( "some string constant" );
          return 0;
        }
      '''
      self.do_run(src, "some string constant")
      
    def test_istream(self):
      if self.emcc_args is None: return self.skip('requires libcxx')

      src = '''
        #include <string>
        #include <sstream>
        #include <iostream>
        
        int main()
        {
            std::string mystring("1 2 3");
            std::istringstream is(mystring);
            int one, two, three;
            
            is >> one >> two >> three;
            
            printf( "%i %i %i", one, two, three );
        }
      '''
      for linkable in [0]:#, 1]:
        print linkable
        Settings.LINKABLE = linkable # regression check for issue #273
        self.do_run(src, "1 2 3")

    def test_readdir(self):
      add_pre_run = '''
def process(filename):
  src = open(filename, 'r').read().replace(
    '// {{PRE_RUN_ADDITIONS}}',
    "FS.createFolder('', 'test', true, true);\\nFS.createLazyFile( 'test', 'some_file', 'http://localhost/some_file', true, false);\\nFS.createFolder('test', 'some_directory', true, true);"
  )
  open(filename, 'w').write(src)
'''

      src = '''
        #include <dirent.h>
        #include <stdio.h>
        
        int main()
        {
            DIR * dir;
            dirent * entity;
        
            dir = opendir( "test" );
        
            while( ( entity = readdir( dir ) ) )
            {
                printf( "%s is a %s\\n", entity->d_name, entity->d_type & DT_DIR ? "directory" : "file" );
            }
        
            return 0;
        }

      '''
      self.do_run(src, ". is a directory\n.. is a directory\nsome_file is a file\nsome_directory is a directory", post_build=add_pre_run)

    def test_fs_base(self):
      Settings.INCLUDE_FULL_LIBRARY = 1
      try:
        addJS = '''
def process(filename):
  import tools.shared as shared
  src = open(filename, 'r').read().replace('FS.init();', '').replace( # Disable normal initialization, replace with ours
    '// {{PRE_RUN_ADDITIONS}}',
    open(shared.path_from_root('tests', 'filesystem', 'src.js'), 'r').read())
  open(filename, 'w').write(src)
'''
        src = 'int main() {return 0;}\n'
        expected = open(path_from_root('tests', 'filesystem', 'output.txt'), 'r').read()
        self.do_run(src, expected, post_build=addJS, extra_emscripten_args=['-H', 'libc/fcntl.h,libc/sys/unistd.h,poll.h,libc/math.h,libc/langinfo.h,libc/time.h'])
      finally:
        Settings.INCLUDE_FULL_LIBRARY = 0

    def test_unistd_access(self):
      add_pre_run = '''
def process(filename):
  import tools.shared as shared
  src = open(filename, 'r').read().replace(
    '// {{PRE_RUN_ADDITIONS}}',
    open(shared.path_from_root('tests', 'unistd', 'access.js'), 'r').read()
  )
  open(filename, 'w').write(src)
'''
      src = open(path_from_root('tests', 'unistd', 'access.c'), 'r').read()
      expected = open(path_from_root('tests', 'unistd', 'access.out'), 'r').read()
      self.do_run(src, expected, post_build=add_pre_run)

    def test_unistd_curdir(self):
      add_pre_run = '''
def process(filename):
  import tools.shared as shared
  src = open(filename, 'r').read().replace(
    '// {{PRE_RUN_ADDITIONS}}',
    open(shared.path_from_root('tests', 'unistd', 'curdir.js'), 'r').read()
  )
  open(filename, 'w').write(src)
'''
      src = open(path_from_root('tests', 'unistd', 'curdir.c'), 'r').read()
      expected = open(path_from_root('tests', 'unistd', 'curdir.out'), 'r').read()
      self.do_run(src, expected, post_build=add_pre_run)

    def test_unistd_close(self):
      src = open(path_from_root('tests', 'unistd', 'close.c'), 'r').read()
      expected = open(path_from_root('tests', 'unistd', 'close.out'), 'r').read()
      self.do_run(src, expected)

    def test_unistd_confstr(self):
      src = open(path_from_root('tests', 'unistd', 'confstr.c'), 'r').read()
      expected = open(path_from_root('tests', 'unistd', 'confstr.out'), 'r').read()
      self.do_run(src, expected, extra_emscripten_args=['-H', 'libc/unistd.h'])

    def test_unistd_ttyname(self):
      add_pre_run = '''
def process(filename):
  import tools.shared as shared
  src = open(filename, 'r').read().replace(
    '// {{PRE_RUN_ADDITIONS}}',
    open(shared.path_from_root('tests', 'unistd', 'ttyname.js'), 'r').read()
  )
  open(filename, 'w').write(src)
'''
      src = open(path_from_root('tests', 'unistd', 'ttyname.c'), 'r').read()
      expected = open(path_from_root('tests', 'unistd', 'ttyname.out'), 'r').read()
      self.do_run(src, expected, post_build=add_pre_run)

    def test_unistd_dup(self):
      src = open(path_from_root('tests', 'unistd', 'dup.c'), 'r').read()
      expected = open(path_from_root('tests', 'unistd', 'dup.out'), 'r').read()
      self.do_run(src, expected)

    def test_unistd_pathconf(self):
      src = open(path_from_root('tests', 'unistd', 'pathconf.c'), 'r').read()
      expected = open(path_from_root('tests', 'unistd', 'pathconf.out'), 'r').read()
      self.do_run(src, expected)

    def test_unistd_truncate(self):
      add_pre_run = '''
def process(filename):
  import tools.shared as shared
  src = open(filename, 'r').read().replace(
    '// {{PRE_RUN_ADDITIONS}}',
    open(shared.path_from_root('tests', 'unistd', 'truncate.js'), 'r').read()
  )
  open(filename, 'w').write(src)
'''
      src = open(path_from_root('tests', 'unistd', 'truncate.c'), 'r').read()
      expected = open(path_from_root('tests', 'unistd', 'truncate.out'), 'r').read()
      self.do_run(src, expected, post_build=add_pre_run)

    def test_unistd_swab(self):
      src = open(path_from_root('tests', 'unistd', 'swab.c'), 'r').read()
      expected = open(path_from_root('tests', 'unistd', 'swab.out'), 'r').read()
      self.do_run(src, expected)

    def test_unistd_isatty(self):
      add_pre_run = '''
def process(filename):
  import tools.shared as shared
  src = open(filename, 'r').read().replace(
    '// {{PRE_RUN_ADDITIONS}}',
    open(shared.path_from_root('tests', 'unistd', 'isatty.js'), 'r').read()
  )
  open(filename, 'w').write(src)
'''
      src = open(path_from_root('tests', 'unistd', 'isatty.c'), 'r').read()
      expected = open(path_from_root('tests', 'unistd', 'isatty.out'), 'r').read()
      self.do_run(src, expected, post_build=add_pre_run)

    def test_unistd_sysconf(self):
      src = open(path_from_root('tests', 'unistd', 'sysconf.c'), 'r').read()
      expected = open(path_from_root('tests', 'unistd', 'sysconf.out'), 'r').read()
      self.do_run(src, expected)

    def test_unistd_login(self):
      src = open(path_from_root('tests', 'unistd', 'login.c'), 'r').read()
      expected = open(path_from_root('tests', 'unistd', 'login.out'), 'r').read()
      self.do_run(src, expected)

    def test_unistd_unlink(self):
      add_pre_run = '''
def process(filename):
  import tools.shared as shared
  src = open(filename, 'r').read().replace(
    '// {{PRE_RUN_ADDITIONS}}',
    open(shared.path_from_root('tests', 'unistd', 'unlink.js'), 'r').read()
  )
  open(filename, 'w').write(src)
'''
      src = open(path_from_root('tests', 'unistd', 'unlink.c'), 'r').read()
      expected = open(path_from_root('tests', 'unistd', 'unlink.out'), 'r').read()
      self.do_run(src, expected, post_build=add_pre_run)

    def test_unistd_links(self):
      add_pre_run = '''
def process(filename):
  import tools.shared as shared
  src = open(filename, 'r').read().replace(
    '// {{PRE_RUN_ADDITIONS}}',
    open(shared.path_from_root('tests', 'unistd', 'links.js'), 'r').read()
  )
  open(filename, 'w').write(src)
'''
      src = open(path_from_root('tests', 'unistd', 'links.c'), 'r').read()
      expected = open(path_from_root('tests', 'unistd', 'links.out'), 'r').read()
      self.do_run(src, expected, post_build=add_pre_run)

    def test_unistd_sleep(self):
      src = open(path_from_root('tests', 'unistd', 'sleep.c'), 'r').read()
      expected = open(path_from_root('tests', 'unistd', 'sleep.out'), 'r').read()
      self.do_run(src, expected)

    def test_unistd_io(self):
      add_pre_run = '''
def process(filename):
  import tools.shared as shared
  src = open(filename, 'r').read().replace(
    '// {{PRE_RUN_ADDITIONS}}',
    open(shared.path_from_root('tests', 'unistd', 'io.js'), 'r').read()
  )
  open(filename, 'w').write(src)
'''
      src = open(path_from_root('tests', 'unistd', 'io.c'), 'r').read()
      expected = open(path_from_root('tests', 'unistd', 'io.out'), 'r').read()
      self.do_run(src, expected, post_build=add_pre_run)

    def test_unistd_misc(self):
      src = open(path_from_root('tests', 'unistd', 'misc.c'), 'r').read()
      expected = open(path_from_root('tests', 'unistd', 'misc.out'), 'r').read()
      self.do_run(src, expected)

    def test_uname(self):
      src = r'''
        #include <stdio.h>
        #include <sys/utsname.h>

        int main() {
          struct utsname u;
          printf("ret: %d\n", uname(&u));
          printf("sysname: %s\n", u.sysname);
          printf("nodename: %s\n", u.nodename);
          printf("release: %s\n", u.release);
          printf("version: %s\n", u.version);
          printf("machine: %s\n", u.machine);
          printf("invalid: %d\n", uname(0));
          return 0;
        }
        '''
      expected = '''
        ret: 0
        sysname: Emscripten
        nodename: emscripten
        release: 1.0
        version: #1
        machine: x86-JS
      '''
      self.do_run(src, re.sub('(^|\n)\s+', '\\1', expected))

    def test_env(self):
      src = open(path_from_root('tests', 'env', 'src.c'), 'r').read()
      expected = open(path_from_root('tests', 'env', 'output.txt'), 'r').read()
      self.do_run(src, expected)

    def test_systypes(self):
      src = open(path_from_root('tests', 'systypes', 'src.c'), 'r').read()
      expected = open(path_from_root('tests', 'systypes', 'output.txt'), 'r').read()
      self.do_run(src, expected)

    def test_getloadavg(self):
      src = r'''
        #include <stdio.h>
        #include <stdlib.h>

        int main() {
          double load[5] = {42.13, 42.13, 42.13, 42.13, 42.13};
          printf("ret: %d\n", getloadavg(load, 5));
          printf("load[0]: %.3lf\n", load[0]);
          printf("load[1]: %.3lf\n", load[1]);
          printf("load[2]: %.3lf\n", load[2]);
          printf("load[3]: %.3lf\n", load[3]);
          printf("load[4]: %.3lf\n", load[4]);
          return 0;
        }
        '''
      expected = '''
        ret: 3
        load[0]: 0.100
        load[1]: 0.100
        load[2]: 0.100
        load[3]: 42.130
        load[4]: 42.130
      '''
      self.do_run(src, re.sub('(^|\n)\s+', '\\1', expected))

    def test_inet(self):
      src = r'''
        #include <stdio.h>
        #include <arpa/inet.h>

        int main() {
          printf("*%x,%x,%x,%x,%x,%x*\n", htonl(0xa1b2c3d4), htonl(0xfe3572e0), htonl(0x07abcdf0), htons(0xabcd), ntohl(0x43211234), ntohs(0xbeaf));
          in_addr_t i = inet_addr("190.180.10.78");
          printf("%x\n", i);
          return 0;
        }
      '''
      self.do_run(src, '*d4c3b2a1,e07235fe,f0cdab07,cdab,34122143,afbe*\n4e0ab4be\n')

    def test_inet2(self):
      src = r'''
        #include <stdio.h>
        #include <arpa/inet.h>

        int main() {
          struct in_addr x, x2;
          int *y = (int*)&x;
          *y = 0x12345678;
          printf("%s\n", inet_ntoa(x));
          int r = inet_aton(inet_ntoa(x), &x2);
          printf("%s\n", inet_ntoa(x2));
          return 0;
        }
      '''
      self.do_run(src, '120.86.52.18\n120.86.52.18\n')

    def test_gethostbyname(self):
      if Settings.USE_TYPED_ARRAYS != 2: return self.skip("assume t2 in gethostbyname")

      src = r'''
        #include <netdb.h>
        #include <stdio.h>

        void test(char *hostname) {
          hostent *host = gethostbyname(hostname);
          if (!host) {
            printf("no such thing\n");
            return;
          }
          printf("%s : %d : %d\n", host->h_name, host->h_addrtype, host->h_length);
          char **name = host->h_aliases;
          while (*name) {
            printf("- %s\n", *name);
            name++;
          }
          name = host->h_addr_list;
          while (name && *name) {
            printf("* ");
            for (int i = 0; i < host->h_length; i++)
              printf("%d.", (*name)[i]);
            printf("\n");
            name++;
          }
        }

        int main() {
          test("www.cheezburger.com");
          test("fail.on.this.never.work"); // we will "work" on this - because we are just making aliases of names to ips
          test("localhost");
          return 0;
        }
      '''
      self.do_run(src, '''www.cheezburger.com : 1 : 4
* -84.29.1.0.
fail.on.this.never.work : 1 : 4
* -84.29.2.0.
localhost : 1 : 4
* -84.29.3.0.
''')

    def test_799(self):
      src = open(path_from_root('tests', '799.cpp'), 'r').read()
      self.do_run(src, '''Set PORT family: 100, port: 3979
Get PORT family: 100
PORT: 3979
''')

    def test_ctype(self):
      # The bit fiddling done by the macros using __ctype_b_loc requires this.
      Settings.CORRECT_SIGNS = 1
      src = open(path_from_root('tests', 'ctype', 'src.c'), 'r').read()
      expected = open(path_from_root('tests', 'ctype', 'output.txt'), 'r').read()
      self.do_run(src, expected)

    def test_strcasecmp(self):
      src = r'''
        #include <stdio.h>
        #include <strings.h>
        int sign(int x) {
          if (x < 0) return -1;
          if (x > 0) return 1;
          return 0;
        }
        int main() {
          printf("*\n");

          printf("%d\n", sign(strcasecmp("hello", "hello")));
          printf("%d\n", sign(strcasecmp("hello1", "hello")));
          printf("%d\n", sign(strcasecmp("hello", "hello1")));
          printf("%d\n", sign(strcasecmp("hello1", "hello1")));
          printf("%d\n", sign(strcasecmp("iello", "hello")));
          printf("%d\n", sign(strcasecmp("hello", "iello")));
          printf("%d\n", sign(strcasecmp("A", "hello")));
          printf("%d\n", sign(strcasecmp("Z", "hello")));
          printf("%d\n", sign(strcasecmp("a", "hello")));
          printf("%d\n", sign(strcasecmp("z", "hello")));
          printf("%d\n", sign(strcasecmp("hello", "a")));
          printf("%d\n", sign(strcasecmp("hello", "z")));

          printf("%d\n", sign(strcasecmp("Hello", "hello")));
          printf("%d\n", sign(strcasecmp("Hello1", "hello")));
          printf("%d\n", sign(strcasecmp("Hello", "hello1")));
          printf("%d\n", sign(strcasecmp("Hello1", "hello1")));
          printf("%d\n", sign(strcasecmp("Iello", "hello")));
          printf("%d\n", sign(strcasecmp("Hello", "iello")));
          printf("%d\n", sign(strcasecmp("A", "hello")));
          printf("%d\n", sign(strcasecmp("Z", "hello")));
          printf("%d\n", sign(strcasecmp("a", "hello")));
          printf("%d\n", sign(strcasecmp("z", "hello")));
          printf("%d\n", sign(strcasecmp("Hello", "a")));
          printf("%d\n", sign(strcasecmp("Hello", "z")));

          printf("%d\n", sign(strcasecmp("hello", "Hello")));
          printf("%d\n", sign(strcasecmp("hello1", "Hello")));
          printf("%d\n", sign(strcasecmp("hello", "Hello1")));
          printf("%d\n", sign(strcasecmp("hello1", "Hello1")));
          printf("%d\n", sign(strcasecmp("iello", "Hello")));
          printf("%d\n", sign(strcasecmp("hello", "Iello")));
          printf("%d\n", sign(strcasecmp("A", "Hello")));
          printf("%d\n", sign(strcasecmp("Z", "Hello")));
          printf("%d\n", sign(strcasecmp("a", "Hello")));
          printf("%d\n", sign(strcasecmp("z", "Hello")));
          printf("%d\n", sign(strcasecmp("hello", "a")));
          printf("%d\n", sign(strcasecmp("hello", "z")));

          printf("%d\n", sign(strcasecmp("Hello", "Hello")));
          printf("%d\n", sign(strcasecmp("Hello1", "Hello")));
          printf("%d\n", sign(strcasecmp("Hello", "Hello1")));
          printf("%d\n", sign(strcasecmp("Hello1", "Hello1")));
          printf("%d\n", sign(strcasecmp("Iello", "Hello")));
          printf("%d\n", sign(strcasecmp("Hello", "Iello")));
          printf("%d\n", sign(strcasecmp("A", "Hello")));
          printf("%d\n", sign(strcasecmp("Z", "Hello")));
          printf("%d\n", sign(strcasecmp("a", "Hello")));
          printf("%d\n", sign(strcasecmp("z", "Hello")));
          printf("%d\n", sign(strcasecmp("Hello", "a")));
          printf("%d\n", sign(strcasecmp("Hello", "z")));

          printf("%d\n", sign(strncasecmp("hello", "hello", 3)));
          printf("%d\n", sign(strncasecmp("hello1", "hello", 3)));
          printf("%d\n", sign(strncasecmp("hello", "hello1", 3)));
          printf("%d\n", sign(strncasecmp("hello1", "hello1", 3)));
          printf("%d\n", sign(strncasecmp("iello", "hello", 3)));
          printf("%d\n", sign(strncasecmp("hello", "iello", 3)));
          printf("%d\n", sign(strncasecmp("A", "hello", 3)));
          printf("%d\n", sign(strncasecmp("Z", "hello", 3)));
          printf("%d\n", sign(strncasecmp("a", "hello", 3)));
          printf("%d\n", sign(strncasecmp("z", "hello", 3)));
          printf("%d\n", sign(strncasecmp("hello", "a", 3)));
          printf("%d\n", sign(strncasecmp("hello", "z", 3)));

          printf("*\n");

          return 0;
        }
      '''
      self.do_run(src, '''*\n0\n1\n-1\n0\n1\n-1\n-1\n1\n-1\n1\n1\n-1\n0\n1\n-1\n0\n1\n-1\n-1\n1\n-1\n1\n1\n-1\n0\n1\n-1\n0\n1\n-1\n-1\n1\n-1\n1\n1\n-1\n0\n1\n-1\n0\n1\n-1\n-1\n1\n-1\n1\n1\n-1\n0\n0\n0\n0\n1\n-1\n-1\n1\n-1\n1\n1\n-1\n*\n''')

    def test_atomic(self):
      src = '''
        #include <stdio.h>
        int main() {
          int x = 10;
          int y = __sync_add_and_fetch(&x, 5);
          printf("*%d,%d*\\n", x, y);
          x = 10;
          y = __sync_fetch_and_add(&x, 5);
          printf("*%d,%d*\\n", x, y);
          x = 10;
          y = __sync_lock_test_and_set(&x, 6);
          printf("*%d,%d*\\n", x, y);
          x = 10;
          y = __sync_bool_compare_and_swap(&x, 9, 7);
          printf("*%d,%d*\\n", x, y);
          y = __sync_bool_compare_and_swap(&x, 10, 7);
          printf("*%d,%d*\\n", x, y);
          return 0;
        }
      '''

      self.do_run(src, '*15,15*\n*15,10*\n*6,10*\n*10,0*\n*7,1*')

    def test_phiundef(self):
      src = r'''
#include <stdlib.h>
#include <stdio.h>

static int state;

struct my_struct {
  union {
    struct {
      unsigned char a;
      unsigned char b;
    } c;
    unsigned int d;
  } e;
  unsigned int f;
};

int main(int argc, char **argv) {
    struct my_struct r;

    state = 0;

    for (int i=0;i<argc+10;i++)
    {
        if (state % 2 == 0)
            r.e.c.a = 3;
        else
            printf("%d\n", r.e.c.a);
        state++;
    }
    return 0;
}
      '''

      self.do_run(src, '3\n3\n3\n3\n3\n')

    # libc++ tests

    def test_iostream(self):
      if Settings.QUANTUM_SIZE == 1: return self.skip("we don't support libcxx in q1")

      if self.emcc_args is None:
        if Building.LLVM_OPTS: return self.skip('optimizing bitcode before emcc can confuse libcxx inclusion')
        self.emcc_args = [] # libc++ auto-inclusion is only done if we use emcc
        Settings.SAFE_HEAP = 0 # Some spurious warnings from libc++ internals

      src = '''
        #include <iostream>

        int main()
        {
          std::cout << "hello world" << std::endl << 77 << "." << std::endl;
          return 0;
        }
      '''

      # FIXME: should not have so many newlines in output here
      self.do_run(src, 'hello world\n77.\n')

    def test_stdvec(self):
      if self.emcc_args is None: return self.skip('requires emcc')
      src = '''
        #include <vector>
        #include <stdio.h>

        struct S {
            int a;
            float b;
        };

        void foo(int a, float b)
        {
          printf("%d:%.2f\\n", a, b);
        }

        int main ( int argc, char *argv[] )
        {
          std::vector<S> ar;  
          S s;

          s.a = 789;
          s.b = 123.456f;
          ar.push_back(s);

          s.a = 0;
          s.b = 100.1f;
          ar.push_back(s);

          foo(ar[0].a, ar[0].b);
          foo(ar[1].a, ar[1].b);
        }
      '''

      self.do_run(src, '789:123.46\n0:100.1')

    def test_reinterpreted_ptrs(self):
      if self.emcc_args is None: return self.skip('needs emcc and libc')

      src = r'''
#include <stdio.h>

class Foo {
private:
    float bar;
public:
    int baz;

    Foo(): bar(0), baz(4711) {};

    int getBar() const;
};

int Foo::getBar() const {
    return this->bar;
};

const Foo *magic1 = reinterpret_cast<Foo*>(0xDEAD111F);
const Foo *magic2 = reinterpret_cast<Foo*>(0xDEAD888F);

static void runTest() {

    const Foo *a = new Foo();
    const Foo *b = a;

    if (a->getBar() == 0) {
        if (a->baz == 4712)
            b = magic1;
        else
            b = magic2;
    }

    printf("%s\n", (b == magic1 ? "magic1" : (b == magic2 ? "magic2" : "neither")));
};

extern "C" {
    int main(int argc, char **argv) {
        runTest();
    }
}
'''
      self.do_run(src, 'magic2')

    def test_jansson(self):
        return self.skip('currently broken')

        if Settings.USE_TYPED_ARRAYS != 2: return self.skip('requires ta2')
        if Settings.SAFE_HEAP: return self.skip('jansson is not safe-heap safe')

        src = '''
          #include <jansson.h>
          #include <stdio.h>
          #include <string.h>

          int main()
          {
            const char* jsonString = "{\\"key\\": \\"value\\",\\"array\\": [\\"array_item1\\",\\"array_item2\\",\\"array_item3\\"],\\"dict\\":{\\"number\\": 3,\\"float\\": 2.2}}";
            
            json_error_t error;
            json_t *root = json_loadb(jsonString, strlen(jsonString), 0, &error);

            if(!root) {
              printf("Node `root` is `null`.");
              return 0;
            }

            if(!json_is_object(root)) {
              printf("Node `root` is no object.");
              return 0;
            }

            printf("%s\\n", json_string_value(json_object_get(root, "key")));
    
            json_t *array = json_object_get(root, "array");
            if(!array) {
              printf("Node `array` is `null`.");
              return 0;
            }

            if(!json_is_array(array)) {
              printf("Node `array` is no array.");
              return 0;
            }

            for(size_t i=0; i<json_array_size(array); ++i)
            {
              json_t *arrayNode = json_array_get(array, i);
              if(!root || !json_is_string(arrayNode))
                return 0;
              printf("%s\\n", json_string_value(arrayNode));
            }

            json_t *dict = json_object_get(root, "dict");
            if(!dict || !json_is_object(dict))
              return 0;

            json_t *numberNode = json_object_get(dict, "number");
            json_t *floatNode = json_object_get(dict, "float");
            
            if(!numberNode || !json_is_number(numberNode) ||
               !floatNode || !json_is_real(floatNode))
              return 0;

            printf("%i\\n", json_integer_value(numberNode));
            printf("%.2f\\n", json_number_value(numberNode));
            printf("%.2f\\n", json_real_value(floatNode));

            json_t *invalidNode = json_object_get(dict, "invalidNode");
            if(invalidNode)
              return 0;

            printf("%i\\n", json_number_value(invalidNode));

            json_decref(root);

            if(!json_is_object(root))
              printf("jansson!\\n");

            return 0;
          }
        '''
        self.do_run(src, 'value\narray_item1\narray_item2\narray_item3\n3\n3.00\n2.20\nJansson: Node with ID `0` not found. Context has `10` nodes.\n0\nJansson: No JSON context.\njansson!')

    ### 'Medium' tests

    def test_fannkuch(self):
        results = [ (1,0), (2,1), (3,2), (4,4), (5,7), (6,10), (7, 16), (8,22) ]
        for i, j in results:
          src = open(path_from_root('tests', 'fannkuch.cpp'), 'r').read()
          self.do_run(src, 'Pfannkuchen(%d) = %d.' % (i,j), [str(i)], no_build=i>1)

    def test_raytrace(self):
        if self.emcc_args is None: return self.skip('requires emcc')
        if Settings.USE_TYPED_ARRAYS == 2: return self.skip('Relies on double value rounding, extremely sensitive')

        src = open(path_from_root('tests', 'raytrace.cpp'), 'r').read().replace('double', 'float')
        output = open(path_from_root('tests', 'raytrace.ppm'), 'r').read()
        self.do_run(src, output, ['3', '16'])#, build_ll_hook=self.do_autodebug)

    def test_fasta(self):
        if self.emcc_args is None: return self.skip('requires emcc')
        results = [ (1,'''GG*ctt**tgagc*'''), (20,'''GGCCGGGCGCGGTGGCTCACGCCTGTAATCCCAGCACTTT*cttBtatcatatgctaKggNcataaaSatgtaaaDcDRtBggDtctttataattcBgtcg**tacgtgtagcctagtgtttgtgttgcgttatagtctatttgtggacacagtatggtcaaa**tgacgtcttttgatctgacggcgttaacaaagatactctg*'''),
(50,'''GGCCGGGCGCGGTGGCTCACGCCTGTAATCCCAGCACTTTGGGAGGCCGAGGCGGGCGGA*TCACCTGAGGTCAGGAGTTCGAGACCAGCCTGGCCAACAT*cttBtatcatatgctaKggNcataaaSatgtaaaDcDRtBggDtctttataattcBgtcg**tactDtDagcctatttSVHtHttKtgtHMaSattgWaHKHttttagacatWatgtRgaaa**NtactMcSMtYtcMgRtacttctWBacgaa**agatactctgggcaacacacatacttctctcatgttgtttcttcggacctttcataacct**ttcctggcacatggttagctgcacatcacaggattgtaagggtctagtggttcagtgagc**ggaatatcattcgtcggtggtgttaatctatctcggtgtagcttataaatgcatccgtaa**gaatattatgtttatttgtcggtacgttcatggtagtggtgtcgccgatttagacgtaaa**ggcatgtatg*''') ]
        for i, j in results:
          src = open(path_from_root('tests', 'fasta.cpp'), 'r').read()
          self.do_run(src, j, [str(i)], lambda x, err: x.replace('\n', '*'), no_build=i>1)

    def test_dlmalloc(self):
      if self.emcc_args is None: self.emcc_args = [] # dlmalloc auto-inclusion is only done if we use emcc

      self.banned_js_engines = [NODE_JS] # slower, and fail on 64-bit
      Settings.CORRECT_SIGNS = 2
      Settings.CORRECT_SIGNS_LINES = ['src.cpp:' + str(i+4) for i in [4816, 4191, 4246, 4199, 4205, 4235, 4227]]
      Settings.TOTAL_MEMORY = 128*1024*1024 # needed with typed arrays

      src = open(path_from_root('system', 'lib', 'dlmalloc.c'), 'r').read() + '\n\n\n' + open(path_from_root('tests', 'dlmalloc_test.c'), 'r').read()
      self.do_run(src, '*1,0*', ['200', '1'])
      self.do_run(src, '*400,0*', ['400', '400'], no_build=True)

      # Linked version
      src = open(path_from_root('tests', 'dlmalloc_test.c'), 'r').read()
      self.do_run(src, '*1,0*', ['200', '1'], extra_emscripten_args=['-m'])
      self.do_run(src, '*400,0*', ['400', '400'], extra_emscripten_args=['-m'], no_build=True)

      if self.emcc_args == []: # TODO: do this in other passes too, passing their opts into emcc
        # emcc should build in dlmalloc automatically, and do all the sign correction etc. for it

        try_delete(os.path.join(self.get_dir(), 'src.cpp.o.js'))
        output = Popen([PYTHON, EMCC, path_from_root('tests', 'dlmalloc_test.c'), '-s', 'TOTAL_MEMORY=' + str(128*1024*1024),
                        '-o', os.path.join(self.get_dir(), 'src.cpp.o.js')], stdout=PIPE, stderr=self.stderr_redirect).communicate()

        self.do_run('x', '*1,0*', ['200', '1'], no_build=True)
        self.do_run('x', '*400,0*', ['400', '400'], no_build=True)

        # The same for new and all its variants
        src = open(path_from_root('tests', 'new.cpp')).read()
        for new, delete in [
          ('malloc(100)', 'free'),
          ('new char[100]', 'delete[]'),
          ('new Structy', 'delete'),
          ('new int', 'delete'),
          ('new Structy[10]', 'delete[]'),
        ]:
          self.do_run(src.replace('{{{ NEW }}}', new).replace('{{{ DELETE }}}', delete), '*1,0*')

    def test_dlmalloc_partial(self):
      if self.emcc_args is None: return self.skip('only emcc will link in dlmalloc')
      # present part of the symbols of dlmalloc, not all
      src = open(path_from_root('tests', 'new.cpp')).read().replace('{{{ NEW }}}', 'new int').replace('{{{ DELETE }}}', 'delete') + '''    
void *
operator new(size_t size)
{
  printf("new %d!\\n", size);
  return malloc(size);
}
'''
      self.do_run(src, 'new 4!\n*1,0*')

    def test_dlmalloc_partial_2(self):
      if self.emcc_args is None or 'SAFE_HEAP' in str(self.emcc_args): return self.skip('only emcc will link in dlmalloc, and we do unsafe stuff')
      # present part of the symbols of dlmalloc, not all. malloc is harder to link than new which is weak.
      src = r'''
        #include <stdio.h>
        #include <stdlib.h>
        void *malloc(size_t size)
        {
          return (void*)123;
        }
        int main() {
          void *x = malloc(10);
          printf("got %p\n", x);
          free(x);
          printf("freed the faker\n");
          return 1;
        }
'''
      self.do_run(src, 'got 0x7b\nfreed')

    def test_libcxx(self):
      if self.emcc_args is None: return self.skip('requires emcc')
      self.do_run(open(path_from_root('tests', 'hashtest.cpp')).read(),
                   'june -> 30\nPrevious (in alphabetical order) is july\nNext (in alphabetical order) is march')

      self.do_run('''
        #include <set>
        #include <stdio.h>
        int main() {
          std::set<int> *fetchOriginatorNums = new std::set<int>();
          fetchOriginatorNums->insert(171);
          printf("hello world\\n");
          return 0;
        }
        ''', 'hello world');

    def test_typeid(self):
      self.do_run(r'''
        #include <stdio.h>
        #include <string.h>
        #include <typeinfo>
        int main() {
          printf("*\n");
          #define MAX 100
          int ptrs[MAX];
          int groups[MAX];
          memset(ptrs, 0, MAX*sizeof(int));
          memset(groups, 0, MAX*sizeof(int));
          int next_group = 1;
          #define TEST(X) { \
            int ptr = (int)&typeid(X); \
            int group = 0; \
            int i; \
            for (i = 0; i < MAX; i++) { \
              if (!groups[i]) break; \
              if (ptrs[i] == ptr) { \
                group = groups[i]; \
                break; \
              } \
            } \
            if (!group) { \
              groups[i] = group = next_group++; \
              ptrs[i] = ptr; \
            } \
            printf("%s:%d\n", #X, group); \
          }
          TEST(int);
          TEST(unsigned int);
          TEST(unsigned);
          TEST(signed int);
          TEST(long);
          TEST(unsigned long);
          TEST(signed long);
          TEST(long long);
          TEST(unsigned long long);
          TEST(signed long long);
          TEST(short);
          TEST(unsigned short);
          TEST(signed short);
          TEST(char);
          TEST(unsigned char);
          TEST(signed char);
          TEST(float);
          TEST(double);
          TEST(long double);
          TEST(void);
          TEST(void*);
          printf("*\n");
        }
        ''', '''*
int:1
unsigned int:2
unsigned:2
signed int:1
long:3
unsigned long:4
signed long:3
long long:5
unsigned long long:6
signed long long:5
short:7
unsigned short:8
signed short:7
char:9
unsigned char:10
signed char:11
float:12
double:13
long double:14
void:15
void*:16
*
''');

    def test_static_variable(self):
      if self.emcc_args is None: Settings.SAFE_HEAP = 0 # LLVM mixes i64 and i8 in the guard check
      src = '''
        #include <stdio.h>

        struct DATA
        {
            int value;
    
            DATA()
            {
                value = 0;
            }
        };

        DATA & GetData()
        {
            static DATA data;
    
            return data;
        }

        int main()
        {
            GetData().value = 10;
            printf( "value:%i", GetData().value );
        }
      '''
      self.do_run(src, 'value:10')

    def test_fakestat(self):
      src = r'''
        #include <stdio.h>
        struct stat { int x, y; };
        int main() {
          stat s;
          s.x = 10;
          s.y = 22;
          printf("*%d,%d*\n", s.x, s.y);
        }
      '''
      self.do_run(src, '*10,22*')

    def test_mmap(self):
      if self.emcc_args is None: return self.skip('requires emcc')
      self.banned_js_engines = [NODE_JS] # slower, and fail on 64-bit

      Settings.TOTAL_MEMORY = 128*1024*1024

      src = '''
        #include <stdio.h>
        #include <sys/mman.h>
        #include <assert.h>
        
        int main(int argc, char *argv[]) {
            for (int i = 0; i < 10; i++) {
              int* map = (int*)mmap(0, 5000, PROT_READ | PROT_WRITE,
                      MAP_SHARED | MAP_ANON, -1, 0);
              assert(((int)map) % 4096 == 0); // aligned
              assert(munmap(map, 5000) == 0);
            }

            const int NUM_BYTES = 8 * 1024 * 1024;
            const int NUM_INTS = NUM_BYTES / sizeof(int);
        
            int* map = (int*)mmap(0, NUM_BYTES, PROT_READ | PROT_WRITE,
                    MAP_SHARED | MAP_ANON, -1, 0);
            assert(map != MAP_FAILED);

            int i;
        
            for (i = 0; i < NUM_INTS; i++) {
                map[i] = i;
            }
        
            for (i = 0; i < NUM_INTS; i++) {
                assert(map[i] == i);
            }
        
            assert(munmap(map, NUM_BYTES) == 0);
            
            printf("hello,world");
            return 0;
        }
      '''
      self.do_run(src, 'hello,world')
      self.do_run(src, 'hello,world', force_c=True)

    def test_mmap_file(self):
      if self.emcc_args is None: return self.skip('requires emcc')
      self.emcc_args += ['--embed-file', 'data.dat']

      open(self.in_dir('data.dat'), 'w').write('data from the file ' + ('.' * 9000))

      src = r'''
        #include <stdio.h>
        #include <sys/mman.h>

        int main() {
          printf("*\n");
          FILE *f = fopen("data.dat", "r");
          char *m;
          m = (char*)mmap(NULL, 9000, PROT_READ, MAP_PRIVATE, fileno(f), 0);
          for (int i = 0; i < 20; i++) putchar(m[i]);
          munmap(m, 9000);
          printf("\n");
          m = (char*)mmap(NULL, 9000, PROT_READ, MAP_PRIVATE, fileno(f), 5);
          for (int i = 0; i < 20; i++) putchar(m[i]);
          munmap(m, 9000);
          printf("\n*\n");
          return 0;
        }
      '''
      self.do_run(src, '*\ndata from the file .\nfrom the file ......\n*\n')

    def test_cubescript(self):
      if self.emcc_args is None: return self.skip('requires emcc')
      if self.emcc_args is not None and '-O2' in self.emcc_args:
        self.emcc_args += ['--closure', '1'] # Use closure here for some additional coverage

      Building.COMPILER_TEST_OPTS = [] # remove -g, so we have one test without it by default
      if self.emcc_args is None: Settings.SAFE_HEAP = 0 # Has some actual loads of unwritten-to places, in the C++ code...

      # Overflows happen in hash loop
      Settings.CORRECT_OVERFLOWS = 1
      Settings.CHECK_OVERFLOWS = 0

      if Settings.USE_TYPED_ARRAYS == 2:
        Settings.CORRECT_SIGNS = 1

      self.do_run(path_from_root('tests', 'cubescript'), '*\nTemp is 33\n9\n5\nhello, everyone\n*', main_file='command.cpp')

    def test_gcc_unmangler(self):
      Settings.NAMED_GLOBALS = 1 # test coverage for this

      Building.COMPILER_TEST_OPTS = ['-I' + path_from_root('third_party')]

      self.do_run(open(path_from_root('third_party', 'gcc_demangler.c')).read(), '*d_demangle(char const*, int, unsigned int*)*', args=['_ZL10d_demanglePKciPj'])

      #### Code snippet that is helpful to search for nonportable optimizations ####
      #global LLVM_OPT_OPTS
      #for opt in ['-aa-eval', '-adce', '-always-inline', '-argpromotion', '-basicaa', '-basiccg', '-block-placement', '-break-crit-edges', '-codegenprepare', '-constmerge', '-constprop', '-correlated-propagation', '-count-aa', '-dce', '-deadargelim', '-deadtypeelim', '-debug-aa', '-die', '-domfrontier', '-domtree', '-dse', '-extract-blocks', '-functionattrs', '-globaldce', '-globalopt', '-globalsmodref-aa', '-gvn', '-indvars', '-inline', '-insert-edge-profiling', '-insert-optimal-edge-profiling', '-instcombine', '-instcount', '-instnamer', '-internalize', '-intervals', '-ipconstprop', '-ipsccp', '-iv-users', '-jump-threading', '-lazy-value-info', '-lcssa', '-lda', '-libcall-aa', '-licm', '-lint', '-live-values', '-loop-deletion', '-loop-extract', '-loop-extract-single', '-loop-index-split', '-loop-reduce', '-loop-rotate', '-loop-unroll', '-loop-unswitch', '-loops', '-loopsimplify', '-loweratomic', '-lowerinvoke', '-lowersetjmp', '-lowerswitch', '-mem2reg', '-memcpyopt', '-memdep', '-mergefunc', '-mergereturn', '-module-debuginfo', '-no-aa', '-no-profile', '-partial-inliner', '-partialspecialization', '-pointertracking', '-postdomfrontier', '-postdomtree', '-preverify', '-prune-eh', '-reassociate', '-reg2mem', '-regions', '-scalar-evolution', '-scalarrepl', '-sccp', '-scev-aa', '-simplify-libcalls', '-simplify-libcalls-halfpowr', '-simplifycfg', '-sink', '-split-geps', '-sretpromotion', '-strip', '-strip-dead-debug-info', '-strip-dead-prototypes', '-strip-debug-declare', '-strip-nondebug', '-tailcallelim', '-tailduplicate', '-targetdata', '-tbaa']:
      #  LLVM_OPT_OPTS = [opt]
      #  try:
      #    self.do_run(path_from_root(['third_party']), '*d_demangle(char const*, int, unsigned int*)*', args=['_ZL10d_demanglePKciPj'], main_file='gcc_demangler.c')
      #    print opt, "ok"
      #  except:
      #    print opt, "FAIL"

    def test_lua(self):
      if self.emcc_args is None: return self.skip('requires emcc')

      if Settings.QUANTUM_SIZE == 1: return self.skip('TODO: make this work')

      # Overflows in luaS_newlstr hash loop
      if self.emcc_args is None: Settings.SAFE_HEAP = 0 # Has various warnings, with copied HEAP_HISTORY values (fixed if we copy 'null' as the type)
      Settings.CORRECT_OVERFLOWS = 1
      Settings.CHECK_OVERFLOWS = 0
      Settings.CORRECT_SIGNS = 1 # Not sure why, but needed

      self.do_ll_run(path_from_root('tests', 'lua', 'lua.ll'),
                      'hello lua world!\n17\n1\n2\n3\n4\n7',
                      args=['-e', '''print("hello lua world!");print(17);for x = 1,4 do print(x) end;print(10-3)'''],
                      output_nicerizer=lambda string, err: (string + err).replace('\n\n', '\n').replace('\n\n', '\n'),
                      extra_emscripten_args=['-H', 'libc/fcntl.h,libc/sys/unistd.h,poll.h,libc/math.h,libc/langinfo.h,libc/time.h'])

    def get_freetype(self):
      return self.get_library('freetype',
                              os.path.join('objs', '.libs', 'libfreetype.a'))

    def test_freetype(self):
      if self.emcc_args is None: return self.skip('requires emcc')
      if Settings.QUANTUM_SIZE == 1: return self.skip('TODO: Figure out and try to fix')
      if Settings.ASM_JS: return self.skip('asm does not support longjmp')

      if Settings.CORRECT_SIGNS == 0: Settings.CORRECT_SIGNS = 1 # Not sure why, but needed

      post = '''
def process(filename):
  import tools.shared as shared
  # Embed the font into the document
  src = open(filename, 'r').read().replace(
    '// {{PRE_RUN_ADDITIONS}}',
    "FS.createDataFile('/', 'font.ttf', %s, true, false);" % str(
      map(ord, open(shared.path_from_root('tests', 'freetype', 'LiberationSansBold.ttf'), 'rb').read())
    )
  )
  open(filename, 'w').write(src)
'''

      # Not needed for js, but useful for debugging
      shutil.copyfile(path_from_root('tests', 'freetype', 'LiberationSansBold.ttf'), os.path.join(self.get_dir(), 'font.ttf')) 

      # Main
      self.do_run(open(path_from_root('tests', 'freetype', 'main.c'), 'r').read(),
                   open(path_from_root('tests', 'freetype', 'ref.txt'), 'r').read(),
                   ['font.ttf', 'test!', '150', '120', '25'],
                   libraries=self.get_freetype(),
                   includes=[path_from_root('tests', 'freetype', 'include')],
                   post_build=post)
                   #build_ll_hook=self.do_autodebug)

      # github issue 324
      print '[issue 324]'
      self.do_run(open(path_from_root('tests', 'freetype', 'main_2.c'), 'r').read(),
                   open(path_from_root('tests', 'freetype', 'ref_2.txt'), 'r').read(),
                   ['font.ttf', 'w', '32', '32', '25'],
                   libraries=self.get_freetype(),
                   includes=[path_from_root('tests', 'freetype', 'include')],
                   post_build=post)

      print '[issue 324 case 2]'
      self.do_run(open(path_from_root('tests', 'freetype', 'main_3.c'), 'r').read(),
                   open(path_from_root('tests', 'freetype', 'ref_3.txt'), 'r').read(),
                   ['font.ttf', 'W', '32', '32', '0'],
                   libraries=self.get_freetype(),
                   includes=[path_from_root('tests', 'freetype', 'include')],
                   post_build=post)

      print '[issue 324 case 3]'
      self.do_run('',
                   open(path_from_root('tests', 'freetype', 'ref_4.txt'), 'r').read(),
                   ['font.ttf', 'ea', '40', '32', '0'],
                   no_build=True)

    def test_sqlite(self):
      # gcc -O3 -I/home/alon/Dev/emscripten/tests/sqlite -ldl src.c
      if self.emcc_args is None: return self.skip('Very slow without ta2, and we would also need to include dlmalloc manually without emcc')
      if Settings.QUANTUM_SIZE == 1: return self.skip('TODO FIXME')
      self.banned_js_engines = [NODE_JS] # OOM in older node

      Settings.CORRECT_SIGNS = 1
      Settings.CORRECT_OVERFLOWS = 0
      Settings.CORRECT_ROUNDINGS = 0
      if self.emcc_args is None: Settings.SAFE_HEAP = 0 # uses time.h to set random bytes, other stuff
      Settings.DISABLE_EXCEPTION_CATCHING = 1
      Settings.FAST_MEMORY = 4*1024*1024
      Settings.EXPORTED_FUNCTIONS += ['_sqlite3_open', '_sqlite3_close', '_sqlite3_exec', '_sqlite3_free', '_callback'];
      if Settings.ASM_JS == 1 and '-g' in self.emcc_args:
        print "disabling inlining" # without registerize (which -g disables), we generate huge amounts of code
        Settings.INLINING_LIMIT = 50

      self.do_run(r'''
                        #define SQLITE_DISABLE_LFS
                        #define LONGDOUBLE_TYPE double
                        #define SQLITE_INT64_TYPE long long int
                        #define SQLITE_THREADSAFE 0
                   ''' + open(path_from_root('tests', 'sqlite', 'sqlite3.c'), 'r').read() +
                         open(path_from_root('tests', 'sqlite', 'benchmark.c'), 'r').read(),
                   open(path_from_root('tests', 'sqlite', 'benchmark.txt'), 'r').read(),
                   includes=[path_from_root('tests', 'sqlite')],
                   force_c=True)

    def test_zlib(self):
      if self.emcc_args is not None and '-O2' in self.emcc_args:
        self.emcc_args += ['--closure', '1'] # Use closure here for some additional coverage

      Settings.CORRECT_SIGNS = 1

      self.do_run(open(path_from_root('tests', 'zlib', 'example.c'), 'r').read(),
                   open(path_from_root('tests', 'zlib', 'ref.txt'), 'r').read(),
                   libraries=self.get_library('zlib', os.path.join('libz.a'), make_args=['libz.a']),
                   includes=[path_from_root('tests', 'zlib')],
                   force_c=True)

    def test_the_bullet(self): # Called thus so it runs late in the alphabetical cycle... it is long
      if self.emcc_args is None: return self.skip('requires emcc')
      if Building.LLVM_OPTS and self.emcc_args is None: Settings.SAFE_HEAP = 0 # Optimizations make it so we do not have debug info on the line we need to ignore

      Settings.DEAD_FUNCTIONS = ['__ZSt9terminatev']

      # Note: this is also a good test of per-file and per-line changes (since we have multiple files, and correct specific lines)
      if Settings.SAFE_HEAP:
        # Ignore bitfield warnings
        Settings.SAFE_HEAP = 3
        Settings.SAFE_HEAP_LINES = ['btVoronoiSimplexSolver.h:40', 'btVoronoiSimplexSolver.h:41',
                                    'btVoronoiSimplexSolver.h:42', 'btVoronoiSimplexSolver.h:43']

      self.do_run(open(path_from_root('tests', 'bullet', 'Demos', 'HelloWorld', 'HelloWorld.cpp'), 'r').read(),
                   [open(path_from_root('tests', 'bullet', 'output.txt'), 'r').read(), # different roundings
                    open(path_from_root('tests', 'bullet', 'output2.txt'), 'r').read(),
                    open(path_from_root('tests', 'bullet', 'output3.txt'), 'r').read()],
                   libraries=self.get_library('bullet', [os.path.join('src', '.libs', 'libBulletDynamics.a'),
                                                          os.path.join('src', '.libs', 'libBulletCollision.a'),
                                                          os.path.join('src', '.libs', 'libLinearMath.a')],
                                               configure_args=['--disable-demos','--disable-dependency-tracking']),
                   includes=[path_from_root('tests', 'bullet', 'src')])

    def test_poppler(self):
      if self.emcc_args is None: return self.skip('very slow, we only do this in emcc runs')
      if Settings.ASM_JS: return self.skip('asm does not support relying on function pointers being cast to different types')

      Settings.CORRECT_OVERFLOWS = 1
      Settings.CORRECT_SIGNS = 1

      Building.COMPILER_TEST_OPTS += [
        '-I' + path_from_root('tests', 'freetype', 'include'),
        '-I' + path_from_root('tests', 'poppler', 'include'),
      ]

      Settings.INVOKE_RUN = 0 # We append code that does run() ourselves

      # See post(), below
      input_file = open(os.path.join(self.get_dir(), 'paper.pdf.js'), 'w')
      input_file.write(str(map(ord, open(path_from_root('tests', 'poppler', 'paper.pdf'), 'rb').read())))
      input_file.close()

      post = '''
def process(filename):
  # To avoid loading this large file to memory and altering it, we simply append to the end
  src = open(filename, 'a')
  src.write(
    \'\'\'
      FS.createDataFile('/', 'paper.pdf', eval(Module.read('paper.pdf.js')), true, false);
      run();
      Module.print("Data: " + JSON.stringify(FS.root.contents['filename-1.ppm'].contents.map(function(x) { return unSign(x, 8) })));
    \'\'\'
  )
  src.close()
'''

      #fontconfig = self.get_library('fontconfig', [os.path.join('src', '.libs', 'libfontconfig.a')]) # Used in file, but not needed, mostly

      freetype = self.get_freetype()

      poppler = self.get_library('poppler',
                                 [os.path.join('utils', 'pdftoppm.o'),
                                  os.path.join('utils', 'parseargs.o'),
                                  os.path.join('poppler', '.libs', 'libpoppler.a')],
                                 env_init={ 'FONTCONFIG_CFLAGS': ' ', 'FONTCONFIG_LIBS': ' ' },
                                 configure_args=['--disable-libjpeg', '--disable-libpng', '--disable-poppler-qt', '--disable-poppler-qt4', '--disable-cms', '--disable-cairo-output', '--disable-abiword-output', '--enable-shared=no'])

      # Combine libraries

      combined = os.path.join(self.get_dir(), 'poppler-combined.bc')
      Building.link(poppler + freetype, combined)

      self.do_ll_run(combined,
                     map(ord, open(path_from_root('tests', 'poppler', 'ref.ppm'), 'r').read()).__str__().replace(' ', ''),
                     args='-scale-to 512 paper.pdf filename'.split(' '),
                     post_build=post)
                     #, build_ll_hook=self.do_autodebug)

    def test_openjpeg(self):
      if self.emcc_args is None: return self.skip('needs libc for getopt')

      if Settings.USE_TYPED_ARRAYS == 2:
        Settings.CORRECT_SIGNS = 1
      else:
        Settings.CORRECT_SIGNS = 2
        Settings.CORRECT_SIGNS_LINES = ["mqc.c:566", "mqc.c:317"]

      post = '''
def process(filename):
  import tools.shared as shared
  original_j2k = shared.path_from_root('tests', 'openjpeg', 'syntensity_lobby_s.j2k')
  src = open(filename, 'r').read().replace(
    '// {{PRE_RUN_ADDITIONS}}',
    "FS.createDataFile('/', 'image.j2k', %s, true, false);" % shared.line_splitter(str(
      map(ord, open(original_j2k, 'rb').read())
    ))
  ).replace(
    '// {{POST_RUN_ADDITIONS}}',
    "Module.print('Data: ' + JSON.stringify(FS.analyzePath('image.raw').object.contents));"
  )
  open(filename, 'w').write(src)
'''

      shutil.copy(path_from_root('tests', 'openjpeg', 'opj_config.h'), self.get_dir())

      lib = self.get_library('openjpeg',
                             [os.path.sep.join('codec/CMakeFiles/j2k_to_image.dir/index.c.o'.split('/')),
                              os.path.sep.join('codec/CMakeFiles/j2k_to_image.dir/convert.c.o'.split('/')),
                              os.path.sep.join('codec/CMakeFiles/j2k_to_image.dir/__/common/color.c.o'.split('/')),
                              os.path.join('bin', self.get_shared_library_name('libopenjpeg.so.1.4.0'))],
                             configure=['cmake', '.'],
                             #configure_args=['--enable-tiff=no', '--enable-jp3d=no', '--enable-png=no'],
                             make_args=[]) # no -j 2, since parallel builds can fail

      # We use doubles in JS, so we get slightly different values than native code. So we
      # check our output by comparing the average pixel difference
      def image_compare(output, err):
        # Get the image generated by JS, from the JSON.stringify'd array
        m = re.search('\[[\d, -]*\]', output)
        try:
          js_data = eval(m.group(0))
        except AttributeError:
          print 'Failed to find proper image output in: ' + output
          raise

        js_data = map(lambda x: x if x >= 0 else 256+x, js_data) # Our output may be signed, so unsign it

        # Get the correct output
        true_data = open(path_from_root('tests', 'openjpeg', 'syntensity_lobby_s.raw'), 'rb').read()

        # Compare them
        assert(len(js_data) == len(true_data))
        num = len(js_data)
        diff_total = js_total = true_total = 0
        for i in range(num):
          js_total += js_data[i]
          true_total += ord(true_data[i])
          diff_total += abs(js_data[i] - ord(true_data[i]))
        js_mean = js_total/float(num)
        true_mean = true_total/float(num)
        diff_mean = diff_total/float(num)

        image_mean = 83.265
        #print '[image stats:', js_mean, image_mean, true_mean, diff_mean, num, ']'
        assert abs(js_mean - image_mean) < 0.01
        assert abs(true_mean - image_mean) < 0.01
        assert diff_mean < 0.01

        return output

      self.emcc_args += ['--minify', '0'] # to compare the versions

      def do_test():
        self.do_run(open(path_from_root('tests', 'openjpeg', 'codec', 'j2k_to_image.c'), 'r').read(),
                     'Successfully generated', # The real test for valid output is in image_compare
                     '-i image.j2k -o image.raw'.split(' '),
                     libraries=lib,
                     includes=[path_from_root('tests', 'openjpeg', 'libopenjpeg'),
                               path_from_root('tests', 'openjpeg', 'codec'),
                               path_from_root('tests', 'openjpeg', 'common'),
                               os.path.join(self.get_build_dir(), 'openjpeg')],
                     force_c=True,
                     post_build=post,
                     output_nicerizer=image_compare)#, build_ll_hook=self.do_autodebug)

      do_test()

      # some test coverage for EMCC_DEBUG 1 and 2
      if self.emcc_args and '-O2' in self.emcc_args and 'EMCC_DEBUG' not in os.environ:
        shutil.copyfile('src.c.o.js', 'release.js')
        try:
          os.environ['EMCC_DEBUG'] = '1'
          print '2'
          do_test()
          shutil.copyfile('src.c.o.js', 'debug1.js')
          os.environ['EMCC_DEBUG'] = '2'
          print '3'
          do_test()
          shutil.copyfile('src.c.o.js', 'debug2.js')
        finally:
          del os.environ['EMCC_DEBUG']
        for debug in [1,2]:
          def clean(text):
            return text.replace('\n\n', '\n').replace('\n\n', '\n').replace('\n\n', '\n').replace('\n\n', '\n').replace('\n\n', '\n')
          self.assertIdentical(clean(open('release.js').read()), clean(open('debug%d.js' % debug).read())) # EMCC_DEBUG=1 mode must not generate different code!
          print >> sys.stderr, 'debug check %d passed too' % debug

        try:
          os.environ['EMCC_FORCE_STDLIBS'] = '1'
          print 'EMCC_FORCE_STDLIBS'
          do_test()
        finally:
          del os.environ['EMCC_FORCE_STDLIBS']
        print >> sys.stderr, 'EMCC_FORCE_STDLIBS ok'

        try_delete(CANONICAL_TEMP_DIR)
      else:
        print >> sys.stderr, 'not doing debug check'

    def test_python(self):
      if self.emcc_args is None: return self.skip('requires emcc')
      if Settings.QUANTUM_SIZE == 1: return self.skip('TODO: make this work')

      # Overflows in string_hash
      Settings.CORRECT_OVERFLOWS = 1
      Settings.CHECK_OVERFLOWS = 0
      if self.emcc_args is None: Settings.SAFE_HEAP = 0 # Has bitfields which are false positives. Also the PyFloat_Init tries to detect endianness.
      Settings.CORRECT_SIGNS = 1 # Not sure why, but needed
      Settings.EXPORTED_FUNCTIONS += ['_PyRun_SimpleStringFlags'] # for the demo

      self.do_ll_run(path_from_root('tests', 'python', 'python.small.bc'),
                      'hello python world!\n[0, 2, 4, 6]\n5\n22\n5.470000',
                      args=['-S', '-c' '''print "hello python world!"; print [x*2 for x in range(4)]; t=2; print 10-3-t; print (lambda x: x*2)(11); print '%f' % 5.47'''])

    def test_lifetime(self):
      if self.emcc_args is None: return self.skip('test relies on emcc opts')

      self.do_ll_run(path_from_root('tests', 'lifetime.ll'), 'hello, world!\n')
      if '-O1' in self.emcc_args or '-O2' in self.emcc_args:
        assert 'a18' not in open(os.path.join(self.get_dir(), 'src.cpp.o.js')).read(), 'lifetime stuff and their vars must be culled'

    # Test cases in separate files. Note that these files may contain invalid .ll!
    # They are only valid enough for us to read for test purposes, not for llvm-as
    # to process.
    def test_cases(self):
      if Building.LLVM_OPTS: return self.skip("Our code is not exactly 'normal' llvm assembly")

      try:
        os.environ['EMCC_LEAVE_INPUTS_RAW'] = '1'
        #self.banned_js_engines = [NODE_JS] # node issue 1669, exception causes stdout not to be flushed
        Settings.CHECK_OVERFLOWS = 0

        for name in glob.glob(path_from_root('tests', 'cases', '*.ll')):
          shortname = name.replace('.ll', '')
          if '' not in shortname: continue
          if '_ta2' in shortname and not Settings.USE_TYPED_ARRAYS == 2:
            print self.skip('case "%s" only relevant for ta2' % shortname)
            continue
          if '_noasm' in shortname and Settings.ASM_JS:
            print self.skip('case "%s" not relevant for asm.js' % shortname)
            continue
          print >> sys.stderr, "Testing case '%s'..." % shortname
          output_file = path_from_root('tests', 'cases', shortname + '.txt')
          if Settings.QUANTUM_SIZE == 1:
            q1_output_file = path_from_root('tests', 'cases', shortname + '_q1.txt')
            if os.path.exists(q1_output_file):
              output_file = q1_output_file
          if os.path.exists(output_file):
            output = open(output_file, 'r').read()
          else:
            output = 'hello, world!'
          if output.rstrip() != 'skip':
            self.do_ll_run(path_from_root('tests', 'cases', name), output)
          # Optional source checking, a python script that gets a global generated with the source
          src_checker = path_from_root('tests', 'cases', shortname + '.py')
          if os.path.exists(src_checker):
            generated = open('src.cpp.o.js').read()
            exec(open(src_checker).read())

      finally:
        del os.environ['EMCC_LEAVE_INPUTS_RAW']

    def test_fuzz(self):
      if Settings.USE_TYPED_ARRAYS != 2: return self.skip('needs ta2')

      Building.COMPILER_TEST_OPTS += ['-I' + path_from_root('tests', 'fuzz')]

      def run_all(x):
        print x
        for name in glob.glob(path_from_root('tests', 'fuzz', '*.c')):
          print name
          self.do_run(open(path_from_root('tests', 'fuzz', name)).read(),
                      open(path_from_root('tests', 'fuzz', name + '.txt')).read(), force_c=True)

      run_all('normal')

      self.emcc_args += ['--llvm-lto', '1']

      run_all('lto')

    # Autodebug the code
    def do_autodebug(self, filename):
      output = Popen([PYTHON, AUTODEBUGGER, filename+'.o.ll', filename+'.o.ll.ll'], stdout=PIPE, stderr=self.stderr_redirect).communicate()[0]
      assert 'Success.' in output, output
      self.prep_ll_run(filename, filename+'.o.ll.ll', force_recompile=True) # rebuild .bc # TODO: use code in do_autodebug_post for this

    # Autodebug the code, after LLVM opts. Will only work once!
    def do_autodebug_post(self, filename):
      if not hasattr(self, 'post'):
        print 'Asking for post re-call'
        self.post = True
        return True
      print 'Autodebugging during post time'
      delattr(self, 'post')
      output = Popen([PYTHON, AUTODEBUGGER, filename+'.o.ll', filename+'.o.ll.ll'], stdout=PIPE, stderr=self.stderr_redirect).communicate()[0]
      assert 'Success.' in output, output
      shutil.copyfile(filename + '.o.ll.ll', filename + '.o.ll')
      Building.llvm_as(filename)
      Building.llvm_dis(filename)

    def test_autodebug(self):
      if Building.LLVM_OPTS: return self.skip('LLVM opts mess us up')

      # Run a test that should work, generating some code
      self.test_structs()

      filename = os.path.join(self.get_dir(), 'src.cpp')
      self.do_autodebug(filename)

      # Compare to each other, and to expected output
      self.do_ll_run(path_from_root('tests', filename+'.o.ll.ll'), '''AD:-1,1''')
      assert open('stdout').read().startswith('AD:-1'), 'We must note when we enter functions'

      # Test using build_ll_hook
      src = '''
          #include <stdio.h>

          char cache[256], *next = cache;

          int main()
          {
            cache[10] = 25;
            next[20] = 51;
            int x = cache[10];
            double y = 11.52;
            printf("*%d,%d,%.2f*\\n", x, cache[20], y);
            return 0;
          }
        '''
      self.do_run(src, '''AD:-1,1''', build_ll_hook=self.do_autodebug)

    def test_corruption(self):
      if Settings.ASM_JS: return self.skip('cannot use corruption checks in asm')
      if Settings.USE_TYPED_ARRAYS != 2: return self.skip('needs ta2 for actual test')

      Settings.CORRUPTION_CHECK = 1

      src = r'''
        #include <stdio.h>
        #include <stdlib.h>
        #include <string.h>
        int main(int argc, char **argv) {
          int size = 1024*argc;
          char *buffer = (char*)malloc(size);
        #if CORRUPT
          memset(buffer, argc, size+15);
        #else
          memset(buffer, argc, size);
        #endif
          for (int x = 0; x < size; x += argc*3) buffer[x] = x/3;
          int ret = 0;
          for (int x = 0; x < size; x++) ret += buffer[x];
          free(buffer);
          printf("All ok, %d\n", ret);
        }
      '''

      for corrupt in [1]:
        self.do_run(src.replace('CORRUPT', str(corrupt)), 'Heap corruption detected!' if corrupt else 'All ok, 4209')

    def test_corruption_2(self):
      if Settings.ASM_JS: return self.skip('cannot use corruption checks in asm')
      if Settings.USE_TYPED_ARRAYS != 2: return self.skip('needs ta2 for actual test')

      Settings.SAFE_HEAP = 1
      Settings.CORRUPTION_CHECK = 1

      # test for free(0), malloc(0), etc.
      src = r'''
        #include <iostream>
        #include <fstream>
        #include <stdlib.h>
        #include <stdio.h>

        void bye() {
          printf("all ok\n");
        }

        int main() {
          atexit(bye);

          std::string testPath = "/Script/WA-KA.txt";
          std::fstream str(testPath.c_str(), std::ios::in | std::ios::binary);

          if (str.is_open())
          {
            std::cout << "open!" << std::endl;
          } else {
            std::cout << "missing!" << std::endl;
          }

          return 1;
        }
        '''
      self.do_run(src, 'missing!\nall ok\n')

    def test_corruption_3(self):
      if Settings.ASM_JS: return self.skip('cannot use corruption checks in asm')
      if Settings.USE_TYPED_ARRAYS != 2: return self.skip('needs ta2 for actual test')

      Settings.CORRUPTION_CHECK = 1

      # realloc
      src = r'''
        #include <stdlib.h>
        #include <stdio.h>
        #include <assert.h>

        void bye() {
          printf("all ok\n");
        }

        int main(int argc, char **argv) {
          atexit(bye);

          char *buffer = (char*)malloc(100);
          for (int i = 0; i < 100; i++) buffer[i] = (i*i)%256;
          buffer = (char*)realloc(buffer, argc + 50);
          for (int i = 0; i < argc + 50; i++) {
            //printf("%d : %d : %d : %d\n", i, (int)(buffer + i), buffer[i], (char)((i*i)%256));
            assert(buffer[i] == (char)((i*i)%256));
          }
          return 1;
        }
        '''
      self.do_run(src, 'all ok\n')

    ### Integration tests

    def test_ccall(self):
      if self.emcc_args is not None and '-O2' in self.emcc_args:
        self.emcc_args += ['--closure', '1'] # Use closure here, to test we export things right

      src = r'''
        #include <stdio.h>

        extern "C" {
          int get_int() { return 5; }
          float get_float() { return 3.14; }
          char * get_string() { return "hello world"; }
          void print_int(int x) { printf("%d\n", x); }
          void print_float(float x) { printf("%.2f\n", x); }
          void print_string(char *x) { printf("%s\n", x); }
          int multi(int x, float y, int z, char *str) { if (x) puts(str); return (x+y)*z; }
          int * pointer(int *in) { printf("%d\n", *in); static int ret = 21; return &ret; }
        }

        int main(int argc, char **argv) {
          // keep them alive
          if (argc == 10) return get_int();
          if (argc == 11) return get_float();
          if (argc == 12) return get_string()[0];
          if (argc == 13) print_int(argv[0][0]);
          if (argc == 14) print_float(argv[0][0]);
          if (argc == 15) print_string(argv[0]);
          if (argc == 16) pointer((int*)argv[0]);
          if (argc % 17 == 12) return multi(argc, float(argc)/2, argc+1, argv[0]);
          return 0;
        }
      '''

      post = '''
def process(filename):
  src = \'\'\'
    var Module = {
      'postRun': function() {
        Module.print('*');
        var ret;
        ret = Module['ccall']('get_int', 'number'); Module.print([typeof ret, ret]);
        ret = ccall('get_float', 'number'); Module.print([typeof ret, ret.toFixed(2)]);
        ret = ccall('get_string', 'string'); Module.print([typeof ret, ret]);
        ret = ccall('print_int', null, ['number'], [12]); Module.print(typeof ret);
        ret = ccall('print_float', null, ['number'], [14.56]); Module.print(typeof ret);
        ret = ccall('print_string', null, ['string'], ["cheez"]); Module.print(typeof ret);
        ret = ccall('print_string', null, ['array'], [[97, 114, 114, 45, 97, 121, 0]]); Module.print(typeof ret);
        ret = ccall('multi', 'number', ['number', 'number', 'number', 'string'], [2, 1.4, 3, 'more']); Module.print([typeof ret, ret]);
        var p = ccall('malloc', 'pointer', ['number'], [4]);
        setValue(p, 650, 'i32');
        ret = ccall('pointer', 'pointer', ['pointer'], [p]); Module.print([typeof ret, getValue(ret, 'i32')]);
        Module.print('*');
        // part 2: cwrap
        var multi = Module['cwrap']('multi', 'number', ['number', 'number', 'number', 'string']);
        Module.print(multi(2, 1.4, 3, 'atr'));
        Module.print(multi(8, 5.4, 4, 'bret'));
        Module.print('*');
        // part 3: avoid stack explosion
        for (var i = 0; i < TOTAL_STACK/60; i++) {
          ccall('multi', 'number', ['number', 'number', 'number', 'string'], [0, 0, 0, '123456789012345678901234567890123456789012345678901234567890']);
        }
        Module.print('stack is ok.');
      }
    };
  \'\'\' + open(filename, 'r').read()
  open(filename, 'w').write(src)
'''

      Settings.EXPORTED_FUNCTIONS += ['_get_int', '_get_float', '_get_string', '_print_int', '_print_float', '_print_string', '_multi', '_pointer', '_malloc']

      self.do_run(src, '*\nnumber,5\nnumber,3.14\nstring,hello world\n12\nundefined\n14.56\nundefined\ncheez\nundefined\narr-ay\nundefined\nmore\nnumber,10\n650\nnumber,21\n*\natr\n10\nbret\n53\n*\nstack is ok.\n', post_build=post)

    def test_pgo(self):
      if Settings.ASM_JS: return self.skip('PGO does not work in asm mode')

      def run_all(name, src):
        print name
        def test(expected, args=[], no_build=False):
          self.do_run(src, expected, args=args, no_build=no_build)
          return open(self.in_dir('src.cpp.o.js')).read()

        # Sanity check that it works and the dead function is emitted
        js = test('*9*')
        assert 'function _unused(' in js

        # Run with PGO, see that unused is true to its name
        Settings.PGO = 1
        test("*9*\n-s DEAD_FUNCTIONS='[\"_unused\"]'")
        Settings.PGO = 0

        # Kill off the dead function, still works and it is not emitted
        Settings.DEAD_FUNCTIONS = ['_unused']
        js = test('*9*')
        assert 'function _unused(' not in js
        Settings.DEAD_FUNCTIONS = []

        # Run the same code with argc that uses the dead function, see abort
        test(('abort', 'is not a function'), args=['a', 'b'], no_build=True)

      # Normal stuff
      run_all('normal', r'''
        #include <stdio.h>
        extern "C" {
        int used(int x) {
          if (x == 0) return -1;
          return used(x/3) + used(x/17) + x%5;
        }
        int unused(int x) {
          if (x == 0) return -1;
          return unused(x/4) + unused(x/23) + x%7;
        }
        }
        int main(int argc, char **argv) {
          printf("*%d*\n", argc == 3 ? unused(argv[0][0] + 1024) : used(argc + 1555));
          return 0;
        }
      ''')

      # Call by function pointer
      run_all('function pointers', r'''
        #include <stdio.h>
        extern "C" {
        int used(int x) {
          if (x == 0) return -1;
          return used(x/3) + used(x/17) + x%5;
        }
        int unused(int x) {
          if (x == 0) return -1;
          return unused(x/4) + unused(x/23) + x%7;
        }
        }
        typedef int (*ii)(int);
        int main(int argc, char **argv) {
          ii pointers[256];
          for (int i = 0; i < 256; i++) {
            pointers[i] = (i == 3) ? unused : used;
          }
          printf("*%d*\n", pointers[argc](argc + 1555));
          return 0;
        }
      ''')

    def test_asm_pgo(self):
      if not Settings.ASM_JS: return self.skip('this is a test for PGO for asm (NB: not *in* asm)')

      src = open(path_from_root('tests', 'hello_libcxx.cpp')).read()
      output = 'hello, world!'

      self.do_run(src, output)
      shutil.move(self.in_dir('src.cpp.o.js'), self.in_dir('normal.js'))

      self.emcc_args = map(lambda x: 'ASM_JS=0' if x == 'ASM_JS=1' else x, self.emcc_args)
      Settings.PGO = 1
      self.do_run(src, output)
      Settings.PGO = 0
      self.emcc_args = map(lambda x: 'ASM_JS=1' if x == 'ASM_JS=0' else x, self.emcc_args)

      shutil.move(self.in_dir('src.cpp.o.js'), self.in_dir('pgo.js'))
      pgo_output = run_js(self.in_dir('pgo.js')).split('\n')[1]
      open('pgo_data', 'w').write(pgo_output)

      # with response file

      self.emcc_args += ['@pgo_data']
      self.do_run(src, output)
      self.emcc_args.pop()
      shutil.move(self.in_dir('src.cpp.o.js'), self.in_dir('pgoed.js'))

      before = len(open('normal.js').read())
      after = len(open('pgoed.js').read())
      assert after < 0.66 * before, [before, after] # expect a big size reduction

      # with response in settings element itself

      open('dead_funcs', 'w').write(pgo_output[pgo_output.find('['):-1])
      self.emcc_args += ['-s', 'DEAD_FUNCTIONS=@' + self.in_dir('dead_funcs')]
      self.do_run(src, output)
      shutil.move(self.in_dir('src.cpp.o.js'), self.in_dir('pgoed2.js'))
      assert open('pgoed.js').read() == open('pgoed2.js').read()

    def test_scriptaclass(self):
        if self.emcc_args is None: return self.skip('requires emcc')

        Settings.EXPORT_BINDINGS = 1

        header_filename = os.path.join(self.get_dir(), 'header.h')
        header = '''
          struct ScriptMe {
            int value;
            ScriptMe(int val);
            int getVal(); // XXX Sadly, inlining these will result in LLVM not
                          // producing any code for them (when just building
                          // as a library)
            void mulVal(int mul);
          };
        '''
        h = open(header_filename, 'w')
        h.write(header)
        h.close()

        src = '''
          #include "header.h"

          ScriptMe::ScriptMe(int val) : value(val) { }
          int ScriptMe::getVal() { return value; }
          void ScriptMe::mulVal(int mul) { value *= mul; }
        '''

        # Way 1: use demangler and namespacer

        script_src = '''
          var sme = Module._.ScriptMe.__new__(83);          // malloc(sizeof(ScriptMe)), ScriptMe::ScriptMe(sme, 83) / new ScriptMe(83) (at addr sme)
          Module._.ScriptMe.mulVal(sme, 2);                 // ScriptMe::mulVal(sme, 2)       sme.mulVal(2)
          Module.print('*' + Module._.ScriptMe.getVal(sme) + '*'); 
          _free(sme);
          Module.print('*ok*');
        '''
        post = '''
def process(filename):
  Popen([PYTHON, DEMANGLER, filename], stdout=open(filename + '.tmp', 'w')).communicate()
  Popen([PYTHON, NAMESPACER, filename, filename + '.tmp'], stdout=open(filename + '.tmp2', 'w')).communicate()
  src = open(filename, 'r').read().replace(
    '// {{MODULE_ADDITIONS}',
    'Module["_"] = ' + open(filename + '.tmp2', 'r').read().replace('var ModuleNames = ', '').rstrip() + ';\n\n' + script_src + '\n\n' +
      '// {{MODULE_ADDITIONS}'
  )
  open(filename, 'w').write(src)
'''
        # XXX disable due to possible v8 bug -- self.do_run(src, '*166*\n*ok*', post_build=post)

        if self.emcc_args is not None and '-O2' in self.emcc_args:
          self.emcc_args += ['--closure', '1'] # Use closure here, to test we export things right

        # Way 2: use CppHeaderParser

        Settings.RUNTIME_TYPE_INFO = 1

        header = '''
          #include <stdio.h>

          class Parent {
          protected:
            int value;
          public:
            Parent(int val);
            Parent(Parent *p, Parent *q); // overload constructor
            int getVal() { return value; }; // inline should work just fine here, unlike Way 1 before
            void mulVal(int mul);
          };

          class Child1 : public Parent {
          public:
            Child1() : Parent(7) { printf("Child1:%d\\n", value); };
            Child1(int val) : Parent(val*2) { value -= 1; printf("Child1:%d\\n", value); };
            int getValSqr() { return value*value; }
            int getValSqr(int more) { return value*value*more; }
            int getValTimes(int times=1) { return value*times; }
          };

          class Child2 : public Parent {
          public:
            Child2() : Parent(9) { printf("Child2:%d\\n", value); };
            int getValCube() { return value*value*value; }
            static void printStatic() { printf("*static*\\n"); }

            virtual void virtualFunc() { printf("*virtualf*\\n"); }
            virtual void virtualFunc2() { printf("*virtualf2*\\n"); }
            static void runVirtualFunc(Child2 *self) { self->virtualFunc(); };
          private:
            void doSomethingSecret() { printf("security breached!\\n"); }; // we should not be able to do this
          };
        '''
        open(header_filename, 'w').write(header)

        basename = os.path.join(self.get_dir(), 'bindingtest')
        output = Popen([PYTHON, BINDINGS_GENERATOR, basename, header_filename], stdout=PIPE, stderr=self.stderr_redirect).communicate()[0]
        #print output
        assert 'Traceback' not in output, 'Failure in binding generation: ' + output

        src = '''
          #include "header.h"

          Parent::Parent(int val) : value(val) { printf("Parent:%d\\n", val); }
          Parent::Parent(Parent *p, Parent *q) : value(p->value + q->value) { printf("Parent:%d\\n", value); }
          void Parent::mulVal(int mul) { value *= mul; }

          #include "bindingtest.cpp"
        '''

        post2 = '''
def process(filename):
  src = open(filename, 'a')
  src.write(open('bindingtest.js').read() + '\\n\\n')
  src.close()
'''

        post3 = '''
def process(filename):
  script_src_2 = \'\'\'
          var sme = new Module.Parent(42);
          sme.mulVal(2);
          Module.print('*')
          Module.print(sme.getVal());

          Module.print('c1');

          var c1 = new Module.Child1();
          Module.print(c1.getVal());
          c1.mulVal(2);
          Module.print(c1.getVal());
          Module.print(c1.getValSqr());
          Module.print(c1.getValSqr(3));
          Module.print(c1.getValTimes()); // default argument should be 1
          Module.print(c1.getValTimes(2));

          Module.print('c1 v2');

          c1 = new Module.Child1(8); // now with a parameter, we should handle the overloading automatically and properly and use constructor #2
          Module.print(c1.getVal());
          c1.mulVal(2);
          Module.print(c1.getVal());
          Module.print(c1.getValSqr());
          Module.print(c1.getValSqr(3));

          Module.print('c2')

          var c2 = new Module.Child2();
          Module.print(c2.getVal());
          c2.mulVal(2);
          Module.print(c2.getVal());
          Module.print(c2.getValCube());
          var succeeded;
          try {
            succeeded = 0;
            Module.print(c2.doSomethingSecret()); // should fail since private
            succeeded = 1;
          } catch(e) {}
          Module.print(succeeded);
          try {
            succeeded = 0;
            Module.print(c2.getValSqr()); // function from the other class
            succeeded = 1;
          } catch(e) {}
          Module.print(succeeded);
          try {
            succeeded = 0;
            c2.getValCube(); // sanity
            succeeded = 1;
          } catch(e) {}
          Module.print(succeeded);

          Module.Child2.prototype.printStatic(); // static calls go through the prototype

          // virtual function
          c2.virtualFunc();
          Module.Child2.prototype.runVirtualFunc(c2);
          c2.virtualFunc2();

''' + ('' if Settings.ASM_JS else '''
          // extend the class from JS
          var c3 = new Module.Child2;
          Module.customizeVTable(c3, [{
            original: Module.Child2.prototype.virtualFunc,
            replacement: function() {
              Module.print('*js virtualf replacement*');
            }
          }, {
            original: Module.Child2.prototype.virtualFunc2,
            replacement: function() {
              Module.print('*js virtualf2 replacement*');
            }
          }]);
          c3.virtualFunc();
          Module.Child2.prototype.runVirtualFunc(c3);
          c3.virtualFunc2();

          c2.virtualFunc(); // original should remain the same
          Module.Child2.prototype.runVirtualFunc(c2);
          c2.virtualFunc2();
''') + '''

          Module.print('*ok*');
        \'\'\'
  src = open(filename, 'a')
  src.write(script_src_2 + '\\n')
  src.close()
'''

        self.do_run(src, '''*
84
c1
Parent:7
Child1:7
7
14
196
588
14
28
c1 v2
Parent:16
Child1:15
15
30
900
2700
c2
Parent:9
Child2:9
9
18
5832
0
0
1
*static*
*virtualf*
*virtualf*
*virtualf2*''' + ('' if Settings.ASM_JS else '''
Parent:9
Child2:9
*js virtualf replacement*
*js virtualf replacement*
*js virtualf2 replacement*
*virtualf*
*virtualf*
*virtualf2*''') + '''
*ok*
''', post_build=[post2, post3])

    def test_scriptaclass_2(self):
        if self.emcc_args is None: return self.skip('requires emcc')

        Settings.EXPORT_BINDINGS = 1

        header_filename = os.path.join(self.get_dir(), 'header.h')
        header = '''
          #include <stdio.h>
          #include <string.h>

          class StringUser {
            char *s;
            int i;
          public:
            StringUser(char *string, int integer) : s(strdup(string)), i(integer) {}
            void Print(int anotherInteger, char *anotherString) {
              printf("|%s|%d|%s|%d|\\n", s, i, anotherString, anotherInteger);
            }
            void CallOther(StringUser *fr) { fr->Print(i, s); }
          };
        '''
        open(header_filename, 'w').write(header)

        basename = os.path.join(self.get_dir(), 'bindingtest')
        output = Popen([PYTHON, BINDINGS_GENERATOR, basename, header_filename], stdout=PIPE, stderr=self.stderr_redirect).communicate()[0]
        #print output
        assert 'Traceback' not in output, 'Failure in binding generation: ' + output

        src = '''
          #include "header.h"

          #include "bindingtest.cpp"
        '''

        post = '''
def process(filename):
  src = open(filename, 'a')
  src.write(open('bindingtest.js').read() + '\\n\\n')
  src.write(\'\'\'
          var user = new Module.StringUser("hello", 43);
          user.Print(41, "world");
            \'\'\')
  src.close()
'''
        self.do_run(src, '|hello|43|world|41|', post_build=post)

    def test_typeinfo(self):
      if self.emcc_args is not None and self.emcc_args != []: return self.skip('full LLVM opts optimize out all the code that uses the type')

      Settings.RUNTIME_TYPE_INFO = 1
      if Settings.QUANTUM_SIZE != 4: return self.skip('We assume normal sizes in the output here')

      src = '''
        #include<stdio.h>
        struct UserStruct {
          int x;
          char y;
          short z;
        };
        struct Encloser {
          short x;
          UserStruct us;
          int y;
        };
        int main() {
          Encloser e;
          e.us.y = 5;
          printf("*ok:%d*\\n", e.us.y);
          return 0;
        }
      '''

      post = '''
def process(filename):
  src = open(filename, 'r').read().replace(
    '// {{POST_RUN_ADDITIONS}}',
    \'\'\'
      if (Runtime.typeInfo) {
        Module.print('|' + Runtime.typeInfo.UserStruct.fields + '|' + Runtime.typeInfo.UserStruct.flatIndexes + '|');
        var t = Runtime.generateStructInfo(['x', { us: ['x', 'y', 'z'] }, 'y'], 'Encloser')
        Module.print('|' + [t.x, t.us.x, t.us.y, t.us.z, t.y] + '|');
        Module.print('|' + JSON.stringify(Runtime.generateStructInfo(['x', 'y', 'z'], 'UserStruct')) + '|');
      } else {
        Module.print('No type info.');
      }
    \'\'\'
  )
  open(filename, 'w').write(src)
'''

      self.do_run(src,
                   '*ok:5*\n|i32,i8,i16|0,4,6|\n|0,4,8,10,12|\n|{"__size__":8,"x":0,"y":4,"z":6}|',
                   post_build=post)

      # Make sure that without the setting, we don't spam the .js with the type info
      Settings.RUNTIME_TYPE_INFO = 0
      self.do_run(src, 'No type info.', post_build=post)

    ### Tests for tools

    def test_safe_heap(self):
      if not Settings.SAFE_HEAP: return self.skip('We need SAFE_HEAP to test SAFE_HEAP')
      if Settings.USE_TYPED_ARRAYS == 2: return self.skip('It is ok to violate the load-store assumption with TA2')
      if Building.LLVM_OPTS: return self.skip('LLVM can optimize away the intermediate |x|')

      src = '''
        #include<stdio.h>
        #include<stdlib.h>
        int main() { int *x = (int*)malloc(sizeof(int));
          *x = 20;
          float *y = (float*)x;
          printf("%f\\n", *y);
          printf("*ok*\\n");
          return 0;
        }
      '''

      try:
        self.do_run(src, '*nothingatall*')
      except Exception, e:
        # This test *should* fail, by throwing this exception
        assert 'Assertion failed: Load-store consistency assumption failure!' in str(e), str(e)

      # And we should not fail if we disable checking on that line

      Settings.SAFE_HEAP = 3
      Settings.SAFE_HEAP_LINES = ["src.cpp:7"]

      self.do_run(src, '*ok*')

      # But if we disable the wrong lines, we still fail

      Settings.SAFE_HEAP_LINES = ["src.cpp:99"]

      try:
        self.do_run(src, '*nothingatall*')
      except Exception, e:
        # This test *should* fail, by throwing this exception
        assert 'Assertion failed: Load-store consistency assumption failure!' in str(e), str(e)

      # And reverse the checks with = 2

      Settings.SAFE_HEAP = 2
      Settings.SAFE_HEAP_LINES = ["src.cpp:99"]

      self.do_run(src, '*ok*')

      Settings.SAFE_HEAP = 1

      # Linking multiple files should work too

      module = '''
        #include<stdio.h>
        #include<stdlib.h>
        void callFunc() { int *x = (int*)malloc(sizeof(int));
          *x = 20;
          float *y = (float*)x;
          printf("%f\\n", *y);
        }
      '''
      module_name = os.path.join(self.get_dir(), 'module.cpp')
      open(module_name, 'w').write(module)

      main = '''
        #include<stdio.h>
        #include<stdlib.h>
        extern void callFunc();
        int main() { callFunc();
          int *x = (int*)malloc(sizeof(int));
          *x = 20;
          float *y = (float*)x;
          printf("%f\\n", *y);
          printf("*ok*\\n");
          return 0;
        }
      '''
      main_name = os.path.join(self.get_dir(), 'main.cpp')
      open(main_name, 'w').write(main)

      Building.emcc(module_name, ['-g'])
      Building.emcc(main_name, ['-g'])
      all_name = os.path.join(self.get_dir(), 'all.bc')
      Building.link([module_name + '.o', main_name + '.o'], all_name)

      try:
        self.do_ll_run(all_name, '*nothingatall*')
      except Exception, e:
        # This test *should* fail, by throwing this exception
        assert 'Assertion failed: Load-store consistency assumption failure!' in str(e), str(e)

      # And we should not fail if we disable checking on those lines

      Settings.SAFE_HEAP = 3
      Settings.SAFE_HEAP_LINES = ["module.cpp:7", "main.cpp:9"]

      self.do_ll_run(all_name, '*ok*')

      # But we will fail if we do not disable exactly what we need to - any mistake leads to error

      for lines in [["module.cpp:22", "main.cpp:9"], ["module.cpp:7", "main.cpp:29"], ["module.cpp:127", "main.cpp:449"], ["module.cpp:7"], ["main.cpp:9"]]:
        Settings.SAFE_HEAP_LINES = lines
        try:
          self.do_ll_run(all_name, '*nothingatall*')
        except Exception, e:
          # This test *should* fail, by throwing this exception
          assert 'Assertion failed: Load-store consistency assumption failure!' in str(e), str(e)

    def test_debug(self):
      if '-g' not in Building.COMPILER_TEST_OPTS: Building.COMPILER_TEST_OPTS.append('-g')
      if self.emcc_args is not None:
        if '-O1' in self.emcc_args or '-O2' in self.emcc_args: return self.skip('optimizations remove LLVM debug info')

      src = '''
        #include <stdio.h>
        #include <assert.h>

        void checker(int x) {
          x += 20;
          assert(x < 15); // this is line 7!
        }

        int main() {
          checker(10);
          return 0;
        }
      '''
      try:
        post = r'''
def process(filename):
  lines = open(filename, 'r').readlines()
  lines = filter(lambda line: '___assert_fail(' in line or '___assert_func(' in line, lines)
  found_line_num = any(('//@line 7 "' in line) for line in lines)
  found_filename = any(('src.cpp"\n' in line) for line in lines)
  assert found_line_num, 'Must have debug info with the line number'
  assert found_filename, 'Must have debug info with the filename'
'''
        self.do_run(src, '*nothingatall*', post_build=post)
      except Exception, e:
        # This test *should* fail
        assert 'Assertion failed' in str(e), str(e)

    def test_linespecific(self):
      if Settings.ASM_JS: return self.skip('asm always has corrections on')

      if '-g' not in Building.COMPILER_TEST_OPTS: Building.COMPILER_TEST_OPTS.append('-g')
      if self.emcc_args: self.emcc_args += ['--llvm-opts', '0'] # llvm full opts make the expected failures here not happen

      Settings.CHECK_SIGNS = 0
      Settings.CHECK_OVERFLOWS = 0

      # Signs

      src = '''
        #include <stdio.h>
        #include <assert.h>

        int main()
        {
          int varey = 100;
          unsigned int MAXEY = -1;
          printf("*%d*\\n", varey >= MAXEY); // 100 >= -1? not in unsigned!
        }
      '''

      Settings.CORRECT_SIGNS = 0
      self.do_run(src, '*1*') # This is a fail - we expect 0

      Settings.CORRECT_SIGNS = 1
      self.do_run(src, '*0*') # Now it will work properly

      # And now let's fix just that one line
      Settings.CORRECT_SIGNS = 2
      Settings.CORRECT_SIGNS_LINES = ["src.cpp:9"]
      self.do_run(src, '*0*')

      # Fixing the wrong line should not work
      Settings.CORRECT_SIGNS = 2
      Settings.CORRECT_SIGNS_LINES = ["src.cpp:3"]
      self.do_run(src, '*1*')

      # And reverse the checks with = 2
      Settings.CORRECT_SIGNS = 3
      Settings.CORRECT_SIGNS_LINES = ["src.cpp:3"]
      self.do_run(src, '*0*')
      Settings.CORRECT_SIGNS = 3
      Settings.CORRECT_SIGNS_LINES = ["src.cpp:9"]
      self.do_run(src, '*1*')

      Settings.CORRECT_SIGNS = 0

      # Overflows

      src = '''
        #include<stdio.h>
        int main() {
          int t = 77;
          for (int i = 0; i < 30; i++) {
            t = t + t + t + t + t + 1;
          }
          printf("*%d,%d*\\n", t, t & 127);
          return 0;
        }
      '''

      correct = '*186854335,63*'
      Settings.CORRECT_OVERFLOWS = 0
      try:
        self.do_run(src, correct)
        raise Exception('UNEXPECTED-PASS')
      except Exception, e:
        assert 'UNEXPECTED' not in str(e), str(e)
        assert 'Expected to find' in str(e), str(e)

      Settings.CORRECT_OVERFLOWS = 1
      self.do_run(src, correct) # Now it will work properly

      # And now let's fix just that one line
      Settings.CORRECT_OVERFLOWS = 2
      Settings.CORRECT_OVERFLOWS_LINES = ["src.cpp:6"]
      self.do_run(src, correct)

      # Fixing the wrong line should not work
      Settings.CORRECT_OVERFLOWS = 2
      Settings.CORRECT_OVERFLOWS_LINES = ["src.cpp:3"]
      try:
        self.do_run(src, correct)
        raise Exception('UNEXPECTED-PASS')
      except Exception, e:
        assert 'UNEXPECTED' not in str(e), str(e)
        assert 'Expected to find' in str(e), str(e)

      # And reverse the checks with = 2
      Settings.CORRECT_OVERFLOWS = 3
      Settings.CORRECT_OVERFLOWS_LINES = ["src.cpp:3"]
      self.do_run(src, correct)
      Settings.CORRECT_OVERFLOWS = 3
      Settings.CORRECT_OVERFLOWS_LINES = ["src.cpp:6"]
      try:
        self.do_run(src, correct)
        raise Exception('UNEXPECTED-PASS')
      except Exception, e:
        assert 'UNEXPECTED' not in str(e), str(e)
        assert 'Expected to find' in str(e), str(e)

      Settings.CORRECT_OVERFLOWS = 0

      # Roundings

      src = '''
        #include <stdio.h>
        #include <assert.h>

        int main()
        {
          TYPE x = -5;
          printf("*%d*", x/2);
          x = 5;
          printf("*%d*", x/2);

          float y = -5.33;
          x = y;
          printf("*%d*", x);
          y = 5.33;
          x = y;
          printf("*%d*", x);

          printf("\\n");
        }
      '''

      if Settings.USE_TYPED_ARRAYS != 2: # the errors here are very specific to non-i64 mode 1
        Settings.CORRECT_ROUNDINGS = 0
        self.do_run(src.replace('TYPE', 'long long'), '*-3**2**-6**5*') # JS floor operations, always to the negative. This is an undetected error here!
        self.do_run(src.replace('TYPE', 'int'), '*-2**2**-5**5*') # We get these right, since they are 32-bit and we can shortcut using the |0 trick
        self.do_run(src.replace('TYPE', 'unsigned int'), '*-3**2**-6**5*') # We fail, since no fast shortcut for 32-bit unsigneds

      Settings.CORRECT_ROUNDINGS = 1
      Settings.CORRECT_SIGNS = 1 # To be correct here, we need sign corrections as well
      self.do_run(src.replace('TYPE', 'long long'), '*-2**2**-5**5*') # Correct
      self.do_run(src.replace('TYPE', 'int'), '*-2**2**-5**5*') # Correct
      self.do_run(src.replace('TYPE', 'unsigned int'), '*2147483645**2**-5**5*') # Correct
      Settings.CORRECT_SIGNS = 0

      if Settings.USE_TYPED_ARRAYS != 2: # the errors here are very specific to non-i64 mode 1
        Settings.CORRECT_ROUNDINGS = 2
        Settings.CORRECT_ROUNDINGS_LINES = ["src.cpp:13"] # Fix just the last mistake
        self.do_run(src.replace('TYPE', 'long long'), '*-3**2**-5**5*')
        self.do_run(src.replace('TYPE', 'int'), '*-2**2**-5**5*') # Here we are lucky and also get the first one right
        self.do_run(src.replace('TYPE', 'unsigned int'), '*-3**2**-5**5*') # No such luck here

      # And reverse the check with = 2
      if Settings.USE_TYPED_ARRAYS != 2: # the errors here are very specific to non-i64 mode 1
        Settings.CORRECT_ROUNDINGS = 3
        Settings.CORRECT_ROUNDINGS_LINES = ["src.cpp:999"]
        self.do_run(src.replace('TYPE', 'long long'), '*-2**2**-5**5*')
        self.do_run(src.replace('TYPE', 'int'), '*-2**2**-5**5*')
        Settings.CORRECT_SIGNS = 1 # To be correct here, we need sign corrections as well
        self.do_run(src.replace('TYPE', 'unsigned int'), '*2147483645**2**-5**5*')
        Settings.CORRECT_SIGNS = 0

    def test_exit_status(self):
      src = r'''
        #include <stdio.h>
        #include <stdlib.h>
        static void cleanup() {
          printf("cleanup\n");
        }

        int main()
        {
          atexit(cleanup); // this atexit should still be called
          printf("hello, world!\n");
          exit(118); // Unusual exit status to make sure it's working!
        }
      '''
      self.do_run(src, 'hello, world!\ncleanup\nExit Status: 118')

    def test_gc(self):
      if self.emcc_args == None: return self.skip('needs ta2')
      if Settings.ASM_JS: return self.skip('asm cannot support generic function table')

      Settings.GC_SUPPORT = 1

      src = r'''
        #include <stdio.h>
        #include <gc.h>
        #include <assert.h>

        void *global;

        void finalizer(void *ptr, void *arg) {
          printf("finalizing %d (global == %d)\n", (int)arg, ptr == global);
        }

        void finalizer2(void *ptr, void *arg) {
          printf("finalizing2 %d (global == %d)\n", (int)arg, ptr == global);
        }

        int main() {
          GC_INIT();

          void *local, *local2, *local3, *local4, *local5, *local6;

          // Hold on to global, drop locals

          global = GC_MALLOC(1024); // rooted since in a static allocation
          GC_REGISTER_FINALIZER_NO_ORDER(global, finalizer, 0, 0, 0);
          printf("alloc %p\n", global);

          local = GC_MALLOC(1024); // not rooted since stack is not scanned
          GC_REGISTER_FINALIZER_NO_ORDER(local, finalizer, (void*)1, 0, 0);
          printf("alloc %p\n", local);

          assert((char*)local - (char*)global >= 1024 || (char*)global - (char*)local >= 1024);

          local2 = GC_MALLOC(1024); // no finalizer
          printf("alloc %p\n", local2);

          local3 = GC_MALLOC(1024); // with finalizable2
          GC_REGISTER_FINALIZER_NO_ORDER(local3, finalizer2, (void*)2, 0, 0);
          printf("alloc %p\n", local);

          local4 = GC_MALLOC(1024); // yet another
          GC_REGISTER_FINALIZER_NO_ORDER(local4, finalizer2, (void*)3, 0, 0);
          printf("alloc %p\n", local);

          printf("basic test\n");

          GC_FORCE_COLLECT();

          printf("*\n");

          GC_FREE(global); // force free will actually work

          // scanning inside objects

          global = GC_MALLOC(12);
          GC_REGISTER_FINALIZER_NO_ORDER(global, finalizer, 0, 0, 0);
          local = GC_MALLOC(12);
          GC_REGISTER_FINALIZER_NO_ORDER(local, finalizer, (void*)1, 0, 0);
          local2 = GC_MALLOC_ATOMIC(12);
          GC_REGISTER_FINALIZER_NO_ORDER(local2, finalizer, (void*)2, 0, 0);
          local3 = GC_MALLOC(12);
          GC_REGISTER_FINALIZER_NO_ORDER(local3, finalizer, (void*)3, 0, 0);
          local4 = GC_MALLOC(12);
          GC_REGISTER_FINALIZER_NO_ORDER(local4, finalizer, (void*)4, 0, 0);
          local5 = GC_MALLOC_UNCOLLECTABLE(12);
          // This should never trigger since local5 is uncollectable
          GC_REGISTER_FINALIZER_NO_ORDER(local5, finalizer, (void*)5, 0, 0);

          printf("heap size = %d\n", GC_get_heap_size());

          local4 = GC_REALLOC(local4, 24);

          printf("heap size = %d\n", GC_get_heap_size());

          local6 = GC_MALLOC(12);
          GC_REGISTER_FINALIZER_NO_ORDER(local6, finalizer, (void*)6, 0, 0);
          // This should be the same as a free
          GC_REALLOC(local6, 0);

          void **globalData = (void**)global;
          globalData[0] = local;
          globalData[1] = local2;

          void **localData = (void**)local;
          localData[0] = local3;

          void **local2Data = (void**)local2;
          local2Data[0] = local4; // actually ignored, because local2 is atomic, so 4 is freeable

          printf("object scan test test\n");

          GC_FORCE_COLLECT();

          printf("*\n");

          GC_FREE(global); // force free will actually work

          printf("*\n");

          GC_FORCE_COLLECT();

          printf(".\n");

          global = 0;

          return 0;
        }
      '''
      self.do_run(src, '''basic test
finalizing 1 (global == 0)
finalizing2 2 (global == 0)
finalizing2 3 (global == 0)
*
finalizing 0 (global == 1)
heap size = 72
heap size = 84
finalizing 6 (global == 0)
object scan test test
finalizing 4 (global == 0)
*
finalizing 0 (global == 1)
*
finalizing 1 (global == 0)
finalizing 2 (global == 0)
finalizing 3 (global == 0)
.
''')

  # Generate tests for everything
  def make_run(fullname, name=-1, compiler=-1, llvm_opts=0, embetter=0, quantum_size=0, typed_arrays=0, emcc_args=None):
    exec('''
class %s(T):
  def tearDown(self):
    super(%s, self).tearDown()
    
  def setUp(self):
    super(%s, self).setUp()

    Building.COMPILER_TEST_OPTS = ['-g']
    os.chdir(self.get_dir()) # Ensure the directory exists and go there
    Building.COMPILER = %r

    self.emcc_args = %s
    if self.emcc_args is not None:
      Settings.load(self.emcc_args)
      Building.LLVM_OPTS = 0
      if '-O2' in self.emcc_args:
        Building.COMPILER_TEST_OPTS = [] # remove -g in -O2 tests, for more coverage
      return

    llvm_opts = %d # 1 is yes, 2 is yes and unsafe
    embetter = %d
    quantum_size = %d
    # TODO: Move much of these to a init() function in shared.py, and reuse that
    Settings.USE_TYPED_ARRAYS = %d
    Settings.INVOKE_RUN = 1
    Settings.RELOOP = 0 # we only do them in the "o2" pass
    Settings.MICRO_OPTS = embetter
    Settings.QUANTUM_SIZE = quantum_size
    Settings.ASSERTIONS = 1-embetter
    Settings.SAFE_HEAP = 1-(embetter and llvm_opts)
    Building.LLVM_OPTS = llvm_opts
    Settings.CHECK_OVERFLOWS = 1-(embetter or llvm_opts)
    Settings.CORRECT_OVERFLOWS = 1-(embetter and llvm_opts)
    Settings.CORRECT_SIGNS = 0
    Settings.CORRECT_ROUNDINGS = 0
    Settings.CORRECT_OVERFLOWS_LINES = CORRECT_SIGNS_LINES = CORRECT_ROUNDINGS_LINES = SAFE_HEAP_LINES = []
    Settings.CHECK_SIGNS = 0 #1-(embetter or llvm_opts)
    Settings.RUNTIME_TYPE_INFO = 0
    Settings.DISABLE_EXCEPTION_CATCHING = 0
    Settings.INCLUDE_FULL_LIBRARY = 0
    Settings.BUILD_AS_SHARED_LIB = 0
    Settings.RUNTIME_LINKED_LIBS = []
    Settings.EMULATE_UNALIGNED_ACCESSES = int(Settings.USE_TYPED_ARRAYS == 2 and Building.LLVM_OPTS == 2)
    Settings.DOUBLE_MODE = 1 if Settings.USE_TYPED_ARRAYS and Building.LLVM_OPTS == 0 else 0
    Settings.PRECISE_I64_MATH = 0
    Settings.NAMED_GLOBALS = 0 if not (embetter and llvm_opts) else 1

    Building.pick_llvm_opts(3)

TT = %s
''' % (fullname, fullname, fullname, compiler, str(emcc_args), llvm_opts, embetter, quantum_size, typed_arrays, fullname))
    return TT

  # Make one run with the defaults
  exec('default = make_run("default", compiler=CLANG, emcc_args=[])')

  # Make one run with -O1, with safe heap
  exec('o1 = make_run("o1", compiler=CLANG, emcc_args=["-O1", "-s", "SAFE_HEAP=1"])')

  # Make one run with -O2, but without closure (we enable closure in specific tests, otherwise on everything it is too slow)
  exec('o2 = make_run("o2", compiler=CLANG, emcc_args=["-O2"])')

  # asm.js
  exec('asm2 = make_run("asm2", compiler=CLANG, emcc_args=["-O2", "-s", "ASM_JS=1"])')
  exec('asm2g = make_run("asm2g", compiler=CLANG, emcc_args=["-O2", "-s", "ASM_JS=1", "-g", "-s", "ASSERTIONS=1"])')

  # Make custom runs with various options
  for compiler, quantum, embetter, typed_arrays, llvm_opts in [
    (CLANG, 4, 0, 0, 0),
    (CLANG, 4, 0, 0, 1),
    (CLANG, 4, 1, 1, 0),
    (CLANG, 4, 1, 1, 1),
  ]:
    fullname = 's_%d_%d%s%s' % (
      llvm_opts, embetter, '' if quantum == 4 else '_q' + str(quantum), '' if typed_arrays in [0, 1] else '_t' + str(typed_arrays)
    )
    exec('%s = make_run(fullname, %r,%r,%d,%d,%d,%d)' % (fullname, fullname, compiler, llvm_opts, embetter, quantum, typed_arrays))

  del T # T is just a shape for the specific subclasses, we don't test it itself

  class other(RunnerCore):
    def test_emcc(self):
      for compiler in [EMCC, EMXX]:
        shortcompiler = os.path.basename(compiler)
        suffix = '.c' if compiler == EMCC else '.cpp'

        # --version
        output = Popen([PYTHON, compiler, '--version'], stdout=PIPE, stderr=PIPE).communicate()
        output = output[0].replace('\r', '')
        self.assertContained('''emcc (Emscripten GCC-like replacement)''', output)
        self.assertContained('''Copyright (C) 2013 the Emscripten authors (see AUTHORS.txt)
This is free and open source software under the MIT license.
There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
''', output)

        # -v, without input files
        output = Popen([PYTHON, compiler, '-v'], stdout=PIPE, stderr=PIPE).communicate()
        self.assertContained('''clang version''', output[1].replace('\r', ''), output[1].replace('\r', ''))

        # --help
        output = Popen([PYTHON, compiler, '--help'], stdout=PIPE, stderr=PIPE).communicate()
        self.assertContained('''%s [options] file...

Most normal gcc/g++ options will work, for example:
  --help                   Display this information
  --version                Display compiler version information

Options that are modified or new in %s include:
  -O0                      No optimizations (default)
''' % (shortcompiler, shortcompiler), output[0].replace('\r', ''), output[1].replace('\r', ''))

        # emcc src.cpp ==> writes a.out.js
        self.clear()
        output = Popen([PYTHON, compiler, path_from_root('tests', 'hello_world' + suffix)], stdout=PIPE, stderr=PIPE).communicate()
        assert len(output[0]) == 0, output[0]
        assert os.path.exists('a.out.js'), '\n'.join(output)
        self.assertContained('hello, world!', run_js('a.out.js'))

        # properly report source code errors, and stop there
        self.clear()
        assert not os.path.exists('a.out.js')
        process = Popen([PYTHON, compiler, path_from_root('tests', 'hello_world_error' + suffix)], stdout=PIPE, stderr=PIPE)
        output = process.communicate()
        assert not os.path.exists('a.out.js'), 'compilation failed, so no output file is expected'
        assert len(output[0]) == 0, output[0]
        assert process.returncode is not 0, 'Failed compilation must return a nonzero error code!'
        self.assertNotContained('IOError', output[1]) # no python stack
        self.assertNotContained('Traceback', output[1]) # no python stack
        self.assertContained('error: invalid preprocessing directive', output[1])
        self.assertContained(["error: use of undeclared identifier 'cheez", "error: unknown type name 'cheez'"], output[1])
        self.assertContained('errors generated', output[1])
        assert 'emcc: compiler frontend failed to generate LLVM bitcode, halting' in output[1].split('errors generated.')[1]

        # emcc src.cpp -c    and   emcc src.cpp -o src.[o|bc] ==> should give a .bc file
        #      regression check: -o js should create "js", with bitcode content
        for args in [['-c'], ['-o', 'src.o'], ['-o', 'src.bc'], ['-o', 'src.so'], ['-o', 'js']]:
          target = args[1] if len(args) == 2 else 'hello_world.o'
          self.clear()
          Popen([PYTHON, compiler, path_from_root('tests', 'hello_world' + suffix)] + args, stdout=PIPE, stderr=PIPE).communicate()
          syms = Building.llvm_nm(target)
          assert len(syms.defs) == 1 and 'main' in syms.defs, 'Failed to generate valid bitcode'
          if target == 'js': # make sure emcc can recognize the target as a bitcode file
            shutil.move(target, target + '.bc')
            target += '.bc'
          output = Popen([PYTHON, compiler, target, '-o', target + '.js'], stdout = PIPE, stderr = PIPE).communicate()
          assert len(output[0]) == 0, output[0]
          assert os.path.exists(target + '.js'), 'Expected %s to exist since args are %s : %s' % (target + '.js', str(args), '\n'.join(output))
          self.assertContained('hello, world!', run_js(target + '.js'))

        # handle singleton archives
        self.clear()
        Popen([PYTHON, compiler, path_from_root('tests', 'hello_world' + suffix), '-o', 'a.bc'], stdout=PIPE, stderr=PIPE).communicate()
        Popen([LLVM_AR, 'r', 'a.a', 'a.bc'], stdout=PIPE, stderr=PIPE).communicate()
        assert os.path.exists('a.a')
        output = Popen([PYTHON, compiler, 'a.a']).communicate()
        assert os.path.exists('a.out.js'), output
        self.assertContained('hello, world!', run_js('a.out.js'))

        # emcc src.ll ==> generates .js
        self.clear()
        output = Popen([PYTHON, compiler, path_from_root('tests', 'hello_world.ll')], stdout=PIPE, stderr=PIPE).communicate()
        assert len(output[0]) == 0, output[0]
        assert os.path.exists('a.out.js'), '\n'.join(output)
        self.assertContained('hello, world!', run_js('a.out.js'))

        # emcc [..] -o [path] ==> should work with absolute paths
        try:
          os.mkdir('a_dir')
          os.chdir('a_dir')
          os.mkdir('b_dir')
          for path in [os.path.abspath(os.path.join('..', 'file1.js')), os.path.join('b_dir', 'file2.js')]:
            self.clear(in_curr=True)
            output = Popen([PYTHON, compiler, path_from_root('tests', 'hello_world.ll'), '-o', path], stdout=PIPE, stderr=PIPE).communicate()
            assert os.path.exists(path), path + ' does not exist; ' + '\n'.join(output)
            self.assertContained('hello, world!', run_js(path))
        finally:
          os.chdir(self.get_dir())
          try:
            shutil.rmtree('a_dir')
          except:
            pass

        # dlmalloc. dlmalloc is special in that it is the only part of libc that is (1) hard to write well, and
        # very speed-sensitive. So we do not implement it in JS in library.js, instead we compile it from source
        for source, has_malloc in [('hello_world' + suffix, False), ('hello_malloc.cpp', True)]:
          print source, has_malloc
          self.clear()
          output = Popen([PYTHON, compiler, path_from_root('tests', source)], stdout=PIPE, stderr=PIPE).communicate()
          assert os.path.exists('a.out.js'), '\n'.join(output)
          self.assertContained('hello, world!', run_js('a.out.js'))
          generated = open('a.out.js').read()
          assert ('function _malloc(bytes) {' in generated) == (not has_malloc), 'If malloc is needed, it should be there, if not not'

        # Optimization: emcc src.cpp -o something.js [-Ox]. -O0 is the same as not specifying any optimization setting
        for params, opt_level, bc_params, closure, has_malloc in [ # bc params are used after compiling to bitcode
          (['-o', 'something.js'],                          0, None, 0, 1),
          (['-o', 'something.js', '-O0'],                   0, None, 0, 0),
          (['-o', 'something.js', '-O1'],                   1, None, 0, 0),
          (['-o', 'something.js', '-O1', '--closure', '1'], 1, None, 1, 0),
          (['-o', 'something.js', '-O2'],                   2, None, 0, 1),
          (['-o', 'something.js', '-O2', '--closure', '0'], 2, None, 0, 0),
          (['-o', 'something.js', '-O2', '-g'],             2, None, 0, 0),
          (['-o', 'something.js', '-Os'],                   2, None, 0, 1),
          (['-o', 'something.js', '-O3'],                   3, None, 1, 1),
          (['-o', 'something.js', '-O3', '--closure', '0'], 3, None, 0, 0),
          # and, test compiling to bitcode first
          (['-o', 'something.bc'], 0, [],      0, 0),
          (['-o', 'something.bc'], 0, ['-O0'], 0, 0),
          (['-o', 'something.bc'], 1, ['-O1'], 0, 0),
          (['-o', 'something.bc'], 2, ['-O2'], 0, 0),
          (['-o', 'something.bc'], 3, ['-O3'], 1, 0),
          (['-O1', '-o', 'something.bc'], 0, [], 0, 0), # -Ox is ignored and warned about
        ]:
          print params, opt_level, bc_params, closure, has_malloc
          self.clear()
          keep_debug = '-g' in params
          output = Popen([PYTHON, compiler, path_from_root('tests', 'hello_world_loop' + ('_malloc' if has_malloc else '') + '.cpp')] + params,
                         stdout=PIPE, stderr=PIPE).communicate()
          assert len(output[0]) == 0, output[0]
          if bc_params is not None:
            if '-O1' in params and 'something.bc' in params:
              assert 'warning: -Ox flags ignored, since not generating JavaScript' in output[1]
            assert os.path.exists('something.bc'), output[1]
            output = Popen([PYTHON, compiler, 'something.bc', '-o', 'something.js'] + bc_params, stdout=PIPE, stderr=PIPE).communicate()
          assert os.path.exists('something.js'), output[1]
          assert ('Warning: Applying some potentially unsafe optimizations!' in output[1]) == (opt_level >= 3), 'unsafe warning should appear in opt >= 3'
          self.assertContained('hello, world!', run_js('something.js'))

          # Verify optimization level etc. in the generated code
          # XXX these are quite sensitive, and will need updating when code generation changes
          generated = open('something.js').read() # TODO: parse out the _main function itself, not support code, if the tests below need that some day
          assert 'new Uint16Array' in generated and 'new Uint32Array' in generated, 'typed arrays 2 should be used by default'
          assert 'SAFE_HEAP' not in generated, 'safe heap should not be used by default'
          assert ': while(' not in generated, 'when relooping we also js-optimize, so there should be no labelled whiles'
          if closure:
            if opt_level <= 1: assert 'Module._main =' in generated, 'closure compiler should have been run'
            elif opt_level >= 2: assert 'Module._main=' in generated, 'closure compiler should have been run (and output should be minified)'
          else:
            # closure has not been run, we can do some additional checks. TODO: figure out how to do these even with closure
            assert 'Module._main = ' not in generated, 'closure compiler should not have been run'
            if keep_debug:
              assert ('(label)' in generated) == (opt_level <= 1), 'relooping should be in opt >= 2'
              assert ('assert(STACKTOP < STACK_MAX' in generated) == (opt_level == 0), 'assertions should be in opt == 0'
              assert 'var $i;' in generated or 'var $i_0' in generated or 'var $storemerge3;' in generated or 'var $storemerge4;' in generated or 'var $i_04;' in generated, 'micro opts should always be on'
            if opt_level >= 2:
              assert re.search('HEAP8\[\$?\w+ ?\+ ?\(+\$?\w+ ?', generated) or re.search('HEAP8\[HEAP32\[', generated), 'eliminator should create compound expressions, and fewer one-time vars' # also in -O1, but easier to test in -O2
            assert ('_puts(' in generated) == (opt_level >= 1), 'with opt >= 1, llvm opts are run and they should optimize printf to puts'
            if opt_level <= 1 or '-g' in params: assert 'function _main() {' in generated, 'Should be unminified, including whitespace'
            elif opt_level >= 2: assert 'function _main(){' in generated, 'Should be whitespace-minified'

        # emcc -s RELOOP=1 src.cpp ==> should pass -s to emscripten.py. --typed-arrays is a convenient alias for -s USE_TYPED_ARRAYS
        for params, test, text in [
          (['-s', 'ASM_JS=1', '-O2'], lambda generated: 'var b=0' in generated and not 'function _main' in generated, 'registerize/minify is run by default in -O2'),
          (['-s', 'ASM_JS=1', '-O2', '--minify', '0'], lambda generated: 'var b = 0' in generated and not 'function _main' in generated, 'minify is cancelled, but not registerize'),
          (['-s', 'ASM_JS=1', '-O2', '-g'], lambda generated: 'var b=0' not in generated and 'var b = 0' not in generated and 'function _main' in generated, 'registerize/minify is cancelled by -g'),
          (['-s', 'INLINING_LIMIT=0'], lambda generated: 'function _dump' in generated, 'no inlining without opts'),
          (['-O3', '-s', 'INLINING_LIMIT=0', '--closure', '0'], lambda generated: 'function _dump' not in generated, 'lto/inlining'),
          (['-Os', '--llvm-lto', '1'], lambda generated: 'function _dump' in generated, '-Os disables inlining'),
          (['-s', 'USE_TYPED_ARRAYS=0'], lambda generated: 'new Int32Array' not in generated, 'disable typed arrays'),
          (['-s', 'USE_TYPED_ARRAYS=1'], lambda generated: 'IHEAPU = ' in generated, 'typed arrays 1 selected'),
          ([], lambda generated: 'Module["_dump"]' not in generated, 'dump is not exported by default'),
          (['-s', 'EXPORTED_FUNCTIONS=["_main", "_dump"]'], lambda generated: 'Module["_dump"]' in generated, 'dump is now exported'),
          (['--typed-arrays', '0'], lambda generated: 'new Int32Array' not in generated, 'disable typed arrays'),
          (['--typed-arrays', '1'], lambda generated: 'IHEAPU = ' in generated, 'typed arrays 1 selected'),
          (['--typed-arrays', '2'], lambda generated: 'new Uint16Array' in generated and 'new Uint32Array' in generated, 'typed arrays 2 selected'),
          (['--llvm-opts', '1'], lambda generated: '_puts(' in generated, 'llvm opts requested'),
        ]:
          self.clear()
          output = Popen([PYTHON, compiler, path_from_root('tests', 'hello_world_loop.cpp'), '-o', 'a.out.js'] + params, stdout=PIPE, stderr=PIPE).communicate()
          assert len(output[0]) == 0, output[0]
          assert os.path.exists('a.out.js'), '\n'.join(output)
          self.assertContained('hello, world!', run_js('a.out.js'))
          assert test(open('a.out.js').read()), text

        # Compiling two source files into a final JS.
        for args, target in [([], 'a.out.js'), (['-o', 'combined.js'], 'combined.js')]:
          self.clear()
          output = Popen([PYTHON, compiler, path_from_root('tests', 'twopart_main.cpp'), path_from_root('tests', 'twopart_side.cpp')] + args,
                         stdout=PIPE, stderr=PIPE).communicate()
          assert len(output[0]) == 0, output[0]
          assert os.path.exists(target), '\n'.join(output)
          self.assertContained('side got: hello from main, over', run_js(target))

          # Compiling two files with -c will generate separate .bc files
          self.clear()
          output = Popen([PYTHON, compiler, path_from_root('tests', 'twopart_main.cpp'), path_from_root('tests', 'twopart_side.cpp'), '-c'] + args,
                         stdout=PIPE, stderr=PIPE).communicate()
          if '-o' in args:
            # specifying -o and -c is an error
            assert 'fatal error' in output[1], output[1]
            continue

          assert os.path.exists('twopart_main.o'), '\n'.join(output)
          assert os.path.exists('twopart_side.o'), '\n'.join(output)
          assert not os.path.exists(target), 'We should only have created bitcode here: ' + '\n'.join(output)

          # Compiling one of them alone is expected to fail
          output = Popen([PYTHON, compiler, 'twopart_main.o'] + args, stdout=PIPE, stderr=PIPE).communicate()
          assert os.path.exists(target), '\n'.join(output)
          #print '\n'.join(output)
          self.assertContained('is not a function', run_js(target, stderr=STDOUT))
          try_delete(target)

          # Combining those bc files into js should work
          output = Popen([PYTHON, compiler, 'twopart_main.o', 'twopart_side.o'] + args, stdout=PIPE, stderr=PIPE).communicate()
          assert os.path.exists(target), '\n'.join(output)
          self.assertContained('side got: hello from main, over', run_js(target))

          # Combining bc files into another bc should also work
          try_delete(target)
          assert not os.path.exists(target)
          output = Popen([PYTHON, compiler, 'twopart_main.o', 'twopart_side.o', '-o', 'combined.bc'] + args, stdout=PIPE, stderr=PIPE).communicate()
          syms = Building.llvm_nm('combined.bc')
          assert len(syms.defs) == 2 and 'main' in syms.defs, 'Failed to generate valid bitcode'
          output = Popen([PYTHON, compiler, 'combined.bc', '-o', 'combined.bc.js'], stdout = PIPE, stderr = PIPE).communicate()
          assert len(output[0]) == 0, output[0]
          assert os.path.exists('combined.bc.js'), 'Expected %s to exist' % ('combined.bc.js')
          self.assertContained('side got: hello from main, over', run_js('combined.bc.js'))

        # --js-transform <transform>
        self.clear()
        trans = os.path.join(self.get_dir(), 't.py')
        trans_file = open(trans, 'w')
        trans_file.write('''
import sys
f = open(sys.argv[1], 'w')
f.write('transformed!')
f.close()
''')
        trans_file.close()
        output = Popen([PYTHON, compiler, path_from_root('tests', 'hello_world' + suffix), '--js-transform', '%s t.py' % (PYTHON)], stdout=PIPE, stderr=PIPE).communicate()
        assert open('a.out.js').read() == 'transformed!', 'Transformed output must be as expected'

      # TODO: Add in files test a clear example of using disablePermissions, and link to it from the wiki
      # TODO: test normal project linking, static and dynamic: get_library should not need to be told what to link!
      # TODO: deprecate llvm optimizations, dlmalloc, etc. in emscripten.py.

    def test_cmake(self):
      # On Windows, we want to build cmake-generated Makefiles with mingw32-make instead of e.g. cygwin make, since mingw32-make
      # understands Windows paths, and cygwin make additionally produces a cryptic 'not valid bitcode file' errors on files that
      # *are* valid bitcode files.

      if os.name == 'nt':
        make_command = 'mingw32-make'
        emscriptencmaketoolchain = path_from_root('cmake', 'Platform', 'Emscripten.cmake')
      else:
        make_command = 'make'
        emscriptencmaketoolchain = path_from_root('cmake', 'Platform', 'Emscripten_unix.cmake')

      cmake_cases = ['target_js', 'target_html']
      cmake_outputs = ['hello_world.js', 'hello_world_gles.html']
      for i in range(0, 2):
        for configuration in ['Debug', 'Release']:
        
          # Create a temp workspace folder
          cmakelistsdir = path_from_root('tests', 'cmake', cmake_cases[i])
          tempdirname = tempfile.mkdtemp(prefix='emscripten_test_' + self.__class__.__name__ + '_', dir=TEMP_DIR)
          try:
            os.chdir(tempdirname)
            
            # Run Cmake
            cmd = ['cmake', '-DCMAKE_TOOLCHAIN_FILE='+emscriptencmaketoolchain, 
                            '-DCMAKE_BUILD_TYPE=' + configuration, 
                            '-DCMAKE_MODULE_PATH=' + path_from_root('cmake').replace('\\', '/'),
                            '-G' 'Unix Makefiles', cmakelistsdir]
            ret = Popen(cmd, stdout=PIPE, stderr=PIPE).communicate()
            if ret[1] != None and len(ret[1].strip()) > 0:
              print >> sys.stderr, ret[1] # If there were any errors, print them directly to console for diagnostics.
            if 'error' in ret[1].lower():
              print >> sys.stderr, 'Failed command: ' + ' '.join(cmd)
              print >> sys.stderr, 'Result:\n' + ret[1]
              raise Exception('cmake call failed!')
            assert os.path.exists(tempdirname + '/Makefile'), 'CMake call did not produce a Makefile!'
            
            # Build
            cmd = [make_command]
            ret = Popen(cmd, stdout=PIPE).communicate()
            if ret[1] != None and len(ret[1].strip()) > 0:
              print >> sys.stderr, ret[1] # If there were any errors, print them directly to console for diagnostics.
            if 'error' in ret[0].lower() and not '0 error(s)' in ret[0].lower():
              print >> sys.stderr, 'Failed command: ' + ' '.join(cmd)
              print >> sys.stderr, 'Result:\n' + ret[0]
              raise Exception('make failed!')
            assert os.path.exists(tempdirname + '/' + cmake_outputs[i]), 'Building a cmake-generated Makefile failed to produce an output file %s!' % tempdirname + '/' + cmake_outputs[i]
            
            # Run through node, if CMake produced a .js file.
            if cmake_outputs[i].endswith('.js'):
              ret = Popen(listify(NODE_JS) + [tempdirname + '/' + cmake_outputs[i]], stdout=PIPE).communicate()[0]
              assert 'hello, world!' in ret, 'Running cmake-based .js application failed!'
          finally:
            os.chdir(path_from_root('tests')) # Move away from the directory we are about to remove.
            shutil.rmtree(tempdirname)

    def test_failure_error_code(self):
      for compiler in [EMCC, EMXX]:
        # Test that if one file is missing from the build, then emcc shouldn't succeed, and shouldn't try to produce an output file.
        process = Popen([PYTHON, compiler, path_from_root('tests', 'hello_world.c'), 'this_file_is_missing.c', '-o', 'this_output_file_should_never_exist.js'], stdout=PIPE, stderr=PIPE)
        process.communicate()
        assert process.returncode is not 0, 'Trying to compile a nonexisting file should return with a nonzero error code!'
        assert os.path.exists('this_output_file_should_never_exist.js') == False, 'Emcc should not produce an output file when build fails!'

    def test_cxx03(self):
      for compiler in [EMCC, EMXX]:
        process = Popen([PYTHON, compiler, path_from_root('tests', 'hello_cxx03.cpp')], stdout=PIPE, stderr=PIPE)
        process.communicate()
        assert process.returncode is 0, 'By default, emscripten should build using -std=c++03!'

    def test_cxx11(self):
      for compiler in [EMCC, EMXX]:
        process = Popen([PYTHON, compiler, '-std=c++11', path_from_root('tests', 'hello_cxx11.cpp')], stdout=PIPE, stderr=PIPE)
        process.communicate()
        assert process.returncode is 0, 'User should be able to specify custom -std= on the command line!'

    def test_catch_undef(self):
      open(os.path.join(self.get_dir(), 'test.cpp'), 'w').write(r'''
        #include <vector>
        #include <stdio.h>
         
        class Test {
        public:
          std::vector<int> vector;
        };
         
        Test globalInstance;
         
        int main() {
          printf("hello, world!\n");
          return 0;
        }
      ''')
      Popen([PYTHON, EMCC, os.path.join(self.get_dir(), 'test.cpp'), '-fsanitize=undefined']).communicate()
      self.assertContained('hello, world!', run_js(os.path.join(self.get_dir(), 'a.out.js')))

    def test_unaligned_memory(self):
      open(os.path.join(self.get_dir(), 'test.cpp'), 'w').write(r'''
        #include <stdio.h>

        typedef unsigned char   Bit8u;
        typedef unsigned short  Bit16u;
        typedef unsigned int    Bit32u;

        int main()
        {
          Bit8u data[4] = {0x01,0x23,0x45,0x67};

          printf("data: %x\n", *(Bit32u*)data);
          printf("data[0,1] 16bit: %x\n", *(Bit16u*)data);
          printf("data[1,2] 16bit: %x\n", *(Bit16u*)(data+1));
        }
      ''')
      Popen([PYTHON, EMCC, os.path.join(self.get_dir(), 'test.cpp'), '-s', 'UNALIGNED_MEMORY=1']).communicate()
      self.assertContained('data: 67452301\ndata[0,1] 16bit: 2301\ndata[1,2] 16bit: 4523', run_js(os.path.join(self.get_dir(), 'a.out.js')))

    def test_unaligned_memory_2(self):
      open(os.path.join(self.get_dir(), 'test.cpp'), 'w').write(r'''
        #include <string>
        #include <stdio.h>

        int main( int argc, char ** argv )
        {
            std::string testString( "Hello, World!" );

            printf( "testString = %s\n", testString.c_str() );
            return 0;
        }
        ''')
      Popen([PYTHON, EMCC, os.path.join(self.get_dir(), 'test.cpp'), '-s', 'UNALIGNED_MEMORY=1']).communicate()
      self.assertContained('testString = Hello, World!', run_js(os.path.join(self.get_dir(), 'a.out.js')))

    def test_asm_minify(self):
      def test(args):
        Popen([PYTHON, EMCC, path_from_root('tests', 'hello_world_loop_malloc.cpp')] + args).communicate()
        self.assertContained('hello, world!', run_js(self.in_dir('a.out.js')))
        return open(self.in_dir('a.out.js')).read()

      src = test([])
      assert 'function _malloc' in src

      src = test(['-O2', '-s', 'ASM_JS=1'])
      normal_size = len(src)
      print 'normal', normal_size
      assert 'function _malloc' not in src

      src = test(['-O2', '-s', 'ASM_JS=1', '--minify', '0'])
      unminified_size = len(src)
      print 'unminified', unminified_size
      assert unminified_size > normal_size
      assert 'function _malloc' not in src

      src = test(['-O2', '-s', 'ASM_JS=1', '-g'])
      debug_size = len(src)
      print 'debug', debug_size
      assert debug_size > unminified_size
      assert 'function _malloc' in src

    def test_l_link(self):
      # Linking with -lLIBNAME and -L/DIRNAME should work

      open(os.path.join(self.get_dir(), 'main.cpp'), 'w').write('''
        extern void printey();
        int main() {
          printey();
          return 0;
        }
      ''')

      try:
        os.makedirs(os.path.join(self.get_dir(), 'libdir'));
      except:
        pass

      open(os.path.join(self.get_dir(), 'libdir', 'libfile.cpp'), 'w').write('''
        #include <stdio.h>
        void printey() {
          printf("hello from lib\\n");
        }
      ''')

      Popen([PYTHON, EMCC, os.path.join(self.get_dir(), 'libdir', 'libfile.cpp'), '-c']).communicate()
      shutil.move(os.path.join(self.get_dir(), 'libfile.o'), os.path.join(self.get_dir(), 'libdir', 'libfile.so'))
      Popen([PYTHON, EMCC, os.path.join(self.get_dir(), 'main.cpp'), '-L' + os.path.join(self.get_dir(), 'libdir'), '-lfile']).communicate()
      self.assertContained('hello from lib', run_js(os.path.join(self.get_dir(), 'a.out.js')))
      assert not os.path.exists('a.out') and not os.path.exists('a.exe'), 'Must not leave unneeded linker stubs'

    def test_multiply_defined_libsymbols(self):
      lib = "int mult() { return 1; }"
      lib_name = os.path.join(self.get_dir(), 'libA.c')
      open(lib_name, 'w').write(lib)
      a2 = "void x() {}"
      a2_name = os.path.join(self.get_dir(), 'a2.c')
      open(a2_name, 'w').write(a2)
      b2 = "void y() {}"
      b2_name = os.path.join(self.get_dir(), 'b2.c')
      open(b2_name, 'w').write(b2)
      main = r'''
        #include <stdio.h>
        int mult();
        int main() {
          printf("result: %d\n", mult());
          return 0;
        }
      '''
      main_name = os.path.join(self.get_dir(), 'main.c')
      open(main_name, 'w').write(main)

      Building.emcc(lib_name, output_filename='libA.so')

      Building.emcc(a2_name, ['-L.', '-lA'])
      Building.emcc(b2_name, ['-L.', '-lA'])

      Building.emcc(main_name, ['-L.', '-lA', a2_name+'.o', b2_name+'.o'], output_filename='a.out.js')

      self.assertContained('result: 1', run_js(os.path.join(self.get_dir(), 'a.out.js')))

    def test_multiply_defined_libsymbols_2(self):
      a = "int x() { return 55; }"
      a_name = os.path.join(self.get_dir(), 'a.c')
      open(a_name, 'w').write(a)
      b = "int y() { return 2; }"
      b_name = os.path.join(self.get_dir(), 'b.c')
      open(b_name, 'w').write(b)
      c = "int z() { return 5; }"
      c_name = os.path.join(self.get_dir(), 'c.c')
      open(c_name, 'w').write(c)
      main = r'''
        #include <stdio.h>
        int x();
        int y();
        int z();
        int main() {
          printf("result: %d\n", x() + y() + z());
          return 0;
        }
      '''
      main_name = os.path.join(self.get_dir(), 'main.c')
      open(main_name, 'w').write(main)

      Building.emcc(a_name) # a.c.o
      Building.emcc(b_name) # b.c.o
      Building.emcc(c_name) # c.c.o
      lib_name = os.path.join(self.get_dir(), 'libLIB.a')
      Building.emar('cr', lib_name, [a_name + '.o', b_name + '.o']) # libLIB.a with a and b

      # a is in the lib AND in an .o, so should be ignored in the lib. We do still need b from the lib though
      Building.emcc(main_name, ['-L.', '-lLIB', a_name+'.o', c_name + '.o'], output_filename='a.out.js')

      self.assertContained('result: 62', run_js(os.path.join(self.get_dir(), 'a.out.js')))

    def test_asm_undefined(self):
      src = r'''
        #include <stdio.h>
        extern void doit();
        int main(int argc, char **argv) {
          if (argc == 121) doit();
          printf("done\n");
          return 1;
        }
      '''
      filename = self.in_dir('src.cpp')
      open(filename, 'w').write(src)
      out, err = Popen([PYTHON, EMCC, filename, '-s', 'ASM_JS=1', '-O2'], stderr=PIPE).communicate()
      assert 'Unresolved symbol' in err, 'always warn on undefs in asm, since it breaks validation: ' + err

    def test_redundant_link(self):
      lib = "int mult() { return 1; }"
      lib_name = os.path.join(self.get_dir(), 'libA.c')
      open(lib_name, 'w').write(lib)
      main = r'''
        #include <stdio.h>
        int mult();
        int main() {
          printf("result: %d\n", mult());
          return 0;
        }
      '''
      main_name = os.path.join(self.get_dir(), 'main.c')
      open(main_name, 'w').write(main)

      Building.emcc(lib_name, output_filename='libA.so')

      Building.emcc(main_name, ['libA.so']*2, output_filename='a.out.js')

      self.assertContained('result: 1', run_js(os.path.join(self.get_dir(), 'a.out.js')))

    def test_abspaths(self):
      # Includes with absolute paths are generally dangerous, things like -I/usr/.. will get to system local headers, not our portable ones.

      shutil.copyfile(path_from_root('tests', 'hello_world.c'), 'main.c')

      for args, expected in [(['-I/usr/something'], True),
                             (['-L/usr/something'], True),
                             (['-Isubdir/something'], False),
                             (['-Lsubdir/something'], False),
                             ([], False)]:
        err = Popen([PYTHON, EMCC, 'main.c'] + args, stderr=PIPE).communicate()[1]
        assert ('emcc: warning: -I or -L of an absolute path encountered. If this is to a local system header/library, it may cause problems (local system files make sense for compiling natively on your system, but not necessarily to JavaScript)' in err) == expected, err

    def test_local_link(self):
      # Linking a local library directly, like /usr/lib/libsomething.so, cannot work of course since it
      # doesn't contain bitcode. However, when we see that we should look for a bitcode file for that
      # library in the -L paths and system/lib
      open(os.path.join(self.get_dir(), 'main.cpp'), 'w').write('''
        extern void printey();
        int main() {
          printey();
          return 0;
        }
      ''')

      try:
        os.makedirs(os.path.join(self.get_dir(), 'subdir'));
      except:
        pass
      open(os.path.join(self.get_dir(), 'subdir', 'libfile.so'), 'w').write('this is not llvm bitcode!')

      open(os.path.join(self.get_dir(), 'libfile.cpp'), 'w').write('''
        #include <stdio.h>
        void printey() {
          printf("hello from lib\\n");
        }
      ''')

      Popen([PYTHON, EMCC, os.path.join(self.get_dir(), 'libfile.cpp'), '-o', 'libfile.so']).communicate()
      Popen([PYTHON, EMCC, os.path.join(self.get_dir(), 'main.cpp'), os.path.join(self.get_dir(), 'subdir', 'libfile.so'), '-L.'], stderr=PIPE).communicate()
      self.assertContained('hello from lib', run_js(os.path.join(self.get_dir(), 'a.out.js')))

    def test_runtimelink_multi(self):
      if Settings.ASM_JS: return self.skip('asm does not support runtime linking yet')

      if SPIDERMONKEY_ENGINE not in JS_ENGINES: return self.skip('cannot run without spidermonkey due to node limitations')

      open('testa.h', 'w').write(r'''
        #ifndef _TESTA_H_
        #define _TESTA_H_

        class TestA {
	        public:
		        TestA();
        };

        #endif
      ''')
      open('testb.h', 'w').write(r'''
        #ifndef _TESTB_H_
        #define _TESTB_H_

        class TestB {
	        public:
		        TestB();
        };

        #endif
      ''')
      open('testa.cpp', 'w').write(r'''
        #include <stdio.h>
        #include <testa.h>

        TestA::TestA() {
	        printf("TestA\n");	
        }
      ''')
      open('testb.cpp', 'w').write(r'''
        #include <stdio.h>
        #include <testb.h>
        #include <testa.h>
        /*
        */
        TestB::TestB() {
	        printf("TestB\n");	
	        TestA* testa = new TestA();
        }
      ''')
      open('main.cpp', 'w').write(r'''
        #include <stdio.h>
        #include <testa.h>
        #include <testb.h>

        /*
        */
        int main(int argc, char** argv) {
	        printf("Main\n");
	        TestA* testa = new TestA();
	        TestB* testb = new TestB();
        }
      ''')

      Popen([PYTHON, EMCC, 'testa.cpp', '-o', 'liba.js', '-s', 'BUILD_AS_SHARED_LIB=2', '-s', 'LINKABLE=1', '-s', 'NAMED_GLOBALS=1', '-I.']).communicate()
      Popen([PYTHON, EMCC, 'testb.cpp', '-o', 'libb.js', '-s', 'BUILD_AS_SHARED_LIB=2', '-s', 'LINKABLE=1', '-s', 'NAMED_GLOBALS=1', '-I.']).communicate()
      Popen([PYTHON, EMCC, 'main.cpp', '-o', 'main.js', '-s', 'RUNTIME_LINKED_LIBS=["liba.js", "libb.js"]', '-s', 'NAMED_GLOBALS=1', '-I.']).communicate()

      Popen([PYTHON, EMCC, 'main.cpp', 'testa.cpp', 'testb.cpp', '-o', 'full.js', '-I.']).communicate()

      self.assertContained('TestA\nTestB\nTestA\n', run_js('main.js', engine=SPIDERMONKEY_ENGINE))

    def test_js_libraries(self):
      open(os.path.join(self.get_dir(), 'main.cpp'), 'w').write('''
        #include <stdio.h>
        extern "C" {
          extern void printey();
          extern int calcey(int x, int y);
        }
        int main() {
          printey();
          printf("*%d*\\n", calcey(10, 22));
          return 0;
        }
      ''')
      open(os.path.join(self.get_dir(), 'mylib1.js'), 'w').write('''
        mergeInto(LibraryManager.library, {
          printey: function() {
            Module.print('hello from lib!');
          }
        });
      ''')
      open(os.path.join(self.get_dir(), 'mylib2.js'), 'w').write('''
        mergeInto(LibraryManager.library, {
          calcey: function(x, y) {
            return x + y;
          }
        });
      ''')

      Popen([PYTHON, EMCC, os.path.join(self.get_dir(), 'main.cpp'), '--js-library', os.path.join(self.get_dir(), 'mylib1.js'),
                                                                       '--js-library', os.path.join(self.get_dir(), 'mylib2.js')]).communicate()
      self.assertContained('hello from lib!\n*32*\n', run_js(os.path.join(self.get_dir(), 'a.out.js')))

    def test_identical_basenames(self):
      # Issue 287: files in different dirs but with the same basename get confused as the same,
      # causing multiply defined symbol errors
      try:
        os.makedirs(os.path.join(self.get_dir(), 'foo'));
      except:
        pass
      try:
        os.makedirs(os.path.join(self.get_dir(), 'bar'));
      except:
        pass
      open(os.path.join(self.get_dir(), 'foo', 'main.cpp'), 'w').write('''
        extern void printey();
        int main() {
          printey();
          return 0;
        }
      ''')
      open(os.path.join(self.get_dir(), 'bar', 'main.cpp'), 'w').write('''
        #include<stdio.h>
        void printey() { printf("hello there\\n"); }
      ''')

      Popen([PYTHON, EMCC, os.path.join(self.get_dir(), 'foo', 'main.cpp'), os.path.join(self.get_dir(), 'bar', 'main.cpp')]).communicate()
      self.assertContained('hello there', run_js(os.path.join(self.get_dir(), 'a.out.js')))

      # ditto with first creating .o files
      try_delete(os.path.join(self.get_dir(), 'a.out.js'))
      Popen([PYTHON, EMCC, os.path.join(self.get_dir(), 'foo', 'main.cpp'), '-o', os.path.join(self.get_dir(), 'foo', 'main.o')]).communicate()
      Popen([PYTHON, EMCC, os.path.join(self.get_dir(), 'bar', 'main.cpp'), '-o', os.path.join(self.get_dir(), 'bar', 'main.o')]).communicate()
      Popen([PYTHON, EMCC, os.path.join(self.get_dir(), 'foo', 'main.o'), os.path.join(self.get_dir(), 'bar', 'main.o')]).communicate()
      self.assertContained('hello there', run_js(os.path.join(self.get_dir(), 'a.out.js')))

    def test_main_a(self):
      # if main() is in a .a, we need to pull in that .a

      main_name = os.path.join(self.get_dir(), 'main.c')
      open(main_name, 'w').write(r'''
        #include <stdio.h>
        extern int f();
        int main() {
          printf("result: %d.\n", f());
          return 0;
        }
      ''')

      other_name = os.path.join(self.get_dir(), 'other.c')
      open(other_name, 'w').write(r'''
        #include <stdio.h>
        int f() { return 12346; }
      ''')

      Popen([PYTHON, EMCC, main_name, '-c', '-o', main_name+'.bc']).communicate()
      Popen([PYTHON, EMCC, other_name, '-c', '-o', other_name+'.bc']).communicate()

      Popen([PYTHON, EMAR, 'cr', main_name+'.a', main_name+'.bc']).communicate()

      Popen([PYTHON, EMCC, other_name+'.bc', main_name+'.a']).communicate()

      self.assertContained('result: 12346.', run_js(os.path.join(self.get_dir(), 'a.out.js')))

    def test_dup_o_in_a(self):
      open('common.c', 'w').write(r'''
        #include <stdio.h>
        void a(void) {
          printf("a\n");
        }
      ''')
      Popen([PYTHON, EMCC, 'common.c', '-c', '-o', 'common.o']).communicate()
      Popen([PYTHON, EMAR, 'rc', 'liba.a', 'common.o']).communicate()

      open('common.c', 'w').write(r'''
        #include <stdio.h>
        void b(void) {
          printf("b\n");
        }
      ''')
      Popen([PYTHON, EMCC, 'common.c', '-c', '-o', 'common.o']).communicate()
      Popen([PYTHON, EMAR, 'rc', 'libb.a', 'common.o']).communicate()

      open('main.c', 'w').write(r'''
        void a(void);
        void b(void);
        int main() {
          a();
          b();
        }
      ''')
      Popen([PYTHON, EMCC, 'main.c', '-L.', '-la', '-lb']).communicate()

      self.assertContained('a\nb\n', run_js(os.path.join(self.get_dir(), 'a.out.js')))

    def test_embed_file(self):
      open(os.path.join(self.get_dir(), 'somefile.txt'), 'w').write('''hello from a file with lots of data and stuff in it thank you very much''')
      open(os.path.join(self.get_dir(), 'main.cpp'), 'w').write(r'''
        #include <stdio.h>
        int main() {
          FILE *f = fopen("somefile.txt", "r");
          char buf[100];
          fread(buf, 1, 20, f);
          buf[20] = 0;
          fclose(f);
          printf("|%s|\n", buf);
          return 0;
        }
      ''')

      Popen([PYTHON, EMCC, os.path.join(self.get_dir(), 'main.cpp'), '--embed-file', 'somefile.txt']).communicate()
      self.assertContained('|hello from a file wi|', run_js(os.path.join(self.get_dir(), 'a.out.js')))

      # preload twice, should not err
      Popen([PYTHON, EMCC, os.path.join(self.get_dir(), 'main.cpp'), '--embed-file', 'somefile.txt', '--embed-file', 'somefile.txt']).communicate()
      self.assertContained('|hello from a file wi|', run_js(os.path.join(self.get_dir(), 'a.out.js')))

    def test_embed_file_dup(self):
      try_delete(os.path.join(self.get_dir(), 'tst'))
      os.mkdir(os.path.join(self.get_dir(), 'tst'))
      os.mkdir(os.path.join(self.get_dir(), 'tst', 'test1'))
      os.mkdir(os.path.join(self.get_dir(), 'tst', 'test2'))

      open(os.path.join(self.get_dir(), 'tst', 'aa.txt'), 'w').write('''frist''')
      open(os.path.join(self.get_dir(), 'tst', 'test1', 'aa.txt'), 'w').write('''sacond''')
      open(os.path.join(self.get_dir(), 'tst', 'test2', 'aa.txt'), 'w').write('''thard''')
      open(os.path.join(self.get_dir(), 'main.cpp'), 'w').write(r'''
        #include <stdio.h>
        #include <string.h>
        void print_file(const char *name) {
          FILE *f = fopen(name, "r");
          char buf[100];
          memset(buf, 0, 100);
          fread(buf, 1, 20, f);
          buf[20] = 0;
          fclose(f);
          printf("|%s|\n", buf);
        }
        int main() {
          print_file("tst/aa.txt");
          print_file("tst/test1/aa.txt");
          print_file("tst/test2/aa.txt");
          return 0;
        }
      ''')

      Popen([PYTHON, EMCC, os.path.join(self.get_dir(), 'main.cpp'), '--embed-file', 'tst']).communicate()
      self.assertContained('|frist|\n|sacond|\n|thard|\n', run_js(os.path.join(self.get_dir(), 'a.out.js')))

    def test_multidynamic_link(self):
      # Linking the same dynamic library in will error, normally, since we statically link it, causing dupe symbols
      # A workaround is to use --ignore-dynamic-linking, see emcc --help for details

      open(os.path.join(self.get_dir(), 'main.cpp'), 'w').write(r'''
        #include <stdio.h>
        extern void printey();
        extern void printother();
        int main() {
          printf("*");
          printey();
          printf("\n");
          printother();
          printf("\n");
          printf("*");
          return 0;
        }
      ''')

      try:
        os.makedirs(os.path.join(self.get_dir(), 'libdir'));
      except:
        pass

      open(os.path.join(self.get_dir(), 'libdir', 'libfile.cpp'), 'w').write('''
        #include <stdio.h>
        void printey() {
          printf("hello from lib");
        }
      ''')

      open(os.path.join(self.get_dir(), 'libdir', 'libother.cpp'), 'w').write('''
        #include <stdio.h>
        extern void printey();
        void printother() {
          printf("|");
          printey();
          printf("|");
        }
      ''')

      # This lets us link the same dynamic lib twice. We will need to link it in manually at the end.
      compiler = [PYTHON, EMCC, '--ignore-dynamic-linking']

      # Build libfile normally into an .so
      Popen(compiler + [os.path.join(self.get_dir(), 'libdir', 'libfile.cpp'), '-o', os.path.join(self.get_dir(), 'libdir', 'libfile.so')]).communicate()
      # Build libother and dynamically link it to libfile - but add --ignore-dynamic-linking
      Popen(compiler + [os.path.join(self.get_dir(), 'libdir', 'libother.cpp'), '-L' + os.path.join(self.get_dir(), 'libdir'), '-lfile', '-o', os.path.join(self.get_dir(), 'libdir', 'libother.so')]).communicate()
      # Build the main file, linking in both the libs
      Popen(compiler + [os.path.join(self.get_dir(), 'main.cpp'), '-L' + os.path.join(self.get_dir(), 'libdir'), '-lfile', '-lother', '-c']).communicate()

      # The normal build system is over. We need to do an additional step to link in the dynamic libraries, since we ignored them before
      Popen([PYTHON, EMCC, os.path.join(self.get_dir(), 'main.o'), '-L' + os.path.join(self.get_dir(), 'libdir'), '-lfile', '-lother']).communicate()

      self.assertContained('*hello from lib\n|hello from lib|\n*', run_js(os.path.join(self.get_dir(), 'a.out.js')))

    def test_js_link(self):
      open(os.path.join(self.get_dir(), 'main.cpp'), 'w').write('''
        #include <stdio.h>
        int main() {
          printf("hello from main\\n");
          return 0;
        }
      ''')
      open(os.path.join(self.get_dir(), 'before.js'), 'w').write('''
        var MESSAGE = 'hello from js';
        if (typeof Module != 'undefined') throw 'This code should run before anything else!';
      ''')
      open(os.path.join(self.get_dir(), 'after.js'), 'w').write('''
        Module.print(MESSAGE);
      ''')

      Popen([PYTHON, EMCC, os.path.join(self.get_dir(), 'main.cpp'), '--pre-js', 'before.js', '--post-js', 'after.js']).communicate()
      self.assertContained('hello from main\nhello from js\n', run_js(os.path.join(self.get_dir(), 'a.out.js')))

    def test_sdl_endianness(self):
      open(os.path.join(self.get_dir(), 'main.cpp'), 'w').write(r'''
        #include <stdio.h>
        #include <SDL/SDL.h>

        int main() {
          printf("%d, %d, %d\n", SDL_BYTEORDER, SDL_LIL_ENDIAN, SDL_BIG_ENDIAN);
          return 0;
        }
      ''')
      Popen([PYTHON, EMCC, os.path.join(self.get_dir(), 'main.cpp')]).communicate()
      self.assertContained('1234, 1234, 4321\n', run_js(os.path.join(self.get_dir(), 'a.out.js')))

    def test_link_memcpy(self):
      # memcpy can show up *after* optimizations, so after our opportunity to link in libc, so it must be special-cased
      open(os.path.join(self.get_dir(), 'main.cpp'), 'w').write(r'''
        #include <stdio.h>

        int main(int argc, char **argv) {
          int num = argc + 10;
          char buf[num], buf2[num];
          for (int i = 0; i < num; i++) {
            buf[i] = i*i+i/3;
          }
          for (int i = 1; i < num; i++) {
            buf[i] += buf[i-1];
          }
          for (int i = 0; i < num; i++) {
            buf2[i] = buf[i];
          }          
          for (int i = 1; i < num; i++) {
            buf2[i] += buf2[i-1];
          }
          for (int i = 0; i < num; i++) {
            printf("%d:%d\n", i, buf2[i]);
          }
          return 0;
        }
      ''')
      Popen([PYTHON, EMCC, '-O2', os.path.join(self.get_dir(), 'main.cpp')]).communicate()
      output = run_js(os.path.join(self.get_dir(), 'a.out.js'), full_output=True, stderr=PIPE)
      self.assertContained('''0:0
1:1
2:6
3:21
4:53
5:111
6:-49
7:98
8:55
9:96
10:-16
''', output)
      self.assertNotContained('warning: library.js memcpy should not be running, it is only for testing!', output)

    def test_warn_undefined(self):
      open(os.path.join(self.get_dir(), 'main.cpp'), 'w').write(r'''
        #include <stdio.h>

        extern "C" {
          void something();
        }

        int main() {
          something();
          return 0;
        }
      ''')
      output = Popen([PYTHON, EMCC, os.path.join(self.get_dir(), 'main.cpp'), '-s', 'WARN_ON_UNDEFINED_SYMBOLS=1'], stderr=PIPE).communicate()
      self.assertContained('Unresolved symbol: _something', output[1])

      output = Popen([PYTHON, EMCC, os.path.join(self.get_dir(), 'main.cpp')], stderr=PIPE).communicate()
      self.assertNotContained('Unresolved symbol: _something\n', output[1])

    def test_toobig(self):
      open(os.path.join(self.get_dir(), 'main.cpp'), 'w').write(r'''
        #include <stdio.h>

        #define BYTES 100*1024*1024

        int main(int argc, char **argv) {
          if (argc == 100) {
            static char buf[BYTES];
            static char buf2[BYTES];
            for (int i = 0; i < BYTES; i++) {
              buf[i] = i*i;
              buf2[i] = i/3;
            }
            for (int i = 0; i < BYTES; i++) {
              buf[i] = buf2[i/2];
              buf2[i] = buf[i/3];
            }
            printf("%d\n", buf[10] + buf2[20]);
          }
          return 0;
        }
      ''')
      output = Popen([PYTHON, EMCC, os.path.join(self.get_dir(), 'main.cpp')], stderr=PIPE).communicate()[1]
      assert 'Emscripten failed' in output, output
      assert 'warning: very large fixed-size structural type' in output, output

    def test_prepost(self):
      open(os.path.join(self.get_dir(), 'main.cpp'), 'w').write('''
        #include <stdio.h>
        int main() {
          printf("hello from main\\n");
          return 0;
        }
      ''')
      open(os.path.join(self.get_dir(), 'pre.js'), 'w').write('''
        var Module = {
          preRun: function() { Module.print('pre-run') },
          postRun: function() { Module.print('post-run') }
        };
      ''')

      Popen([PYTHON, EMCC, os.path.join(self.get_dir(), 'main.cpp'), '--pre-js', 'pre.js']).communicate()
      self.assertContained('pre-run\nhello from main\npost-run\n', run_js(os.path.join(self.get_dir(), 'a.out.js')))

      # never run, so no preRun or postRun
      src = open(os.path.join(self.get_dir(), 'a.out.js')).read().replace('// {{PRE_RUN_ADDITIONS}}', 'addRunDependency()')
      open(os.path.join(self.get_dir(), 'a.out.js'), 'w').write(src)
      self.assertNotContained('pre-run\nhello from main\npost-run\n', run_js(os.path.join(self.get_dir(), 'a.out.js')))

      # noInitialRun prevents run
      for no_initial_run, run_dep in [(0, 0), (1, 0), (0, 1), (1, 1)]:
        print no_initial_run, run_dep
        Popen([PYTHON, EMCC, os.path.join(self.get_dir(), 'main.cpp')]).communicate()
        src = 'var Module = { noInitialRun: %d };\n' % no_initial_run + open(os.path.join(self.get_dir(), 'a.out.js')).read()
        if run_dep:
          src = src.replace('// {{PRE_RUN_ADDITIONS}}', '// {{PRE_RUN_ADDITIONS}}\naddRunDependency("test");') \
                   .replace('// {{POST_RUN_ADDITIONS}}', '// {{POST_RUN_ADDITIONS}}\nremoveRunDependency("test");')
        open(os.path.join(self.get_dir(), 'a.out.js'), 'w').write(src)
        assert ('hello from main' in run_js(os.path.join(self.get_dir(), 'a.out.js'))) != no_initial_run, 'only run if no noInitialRun'

        if no_initial_run:
          # Calling main later should still work, filesystem etc. must be set up.
          src = open(os.path.join(self.get_dir(), 'a.out.js')).read() + '\n_main();\n';
          open(os.path.join(self.get_dir(), 'a.out.js'), 'w').write(src)
          assert 'hello from main' in run_js(os.path.join(self.get_dir(), 'a.out.js')), 'main should print when called manually'

      # Use postInit
      open(os.path.join(self.get_dir(), 'pre.js'), 'w').write('''
        var Module = {
          preRun: function() { Module.print('pre-run') },
          postRun: function() { Module.print('post-run') },
          preInit: function() { Module.print('pre-init') }
        };
      ''')
      Popen([PYTHON, EMCC, os.path.join(self.get_dir(), 'main.cpp'), '--pre-js', 'pre.js']).communicate()
      self.assertContained('pre-init\npre-run\nhello from main\npost-run\n', run_js(os.path.join(self.get_dir(), 'a.out.js')))

    def test_prepost2(self):
      open(os.path.join(self.get_dir(), 'main.cpp'), 'w').write('''
        #include <stdio.h>
        int main() {
          printf("hello from main\\n");
          return 0;
        }
      ''')
      open(os.path.join(self.get_dir(), 'pre.js'), 'w').write('''
        var Module = {
          preRun: function() { Module.print('pre-run') },
        };
      ''')
      open(os.path.join(self.get_dir(), 'pre2.js'), 'w').write('''
        Module.postRun = function() { Module.print('post-run') };
      ''')
      Popen([PYTHON, EMCC, os.path.join(self.get_dir(), 'main.cpp'), '--pre-js', 'pre.js', '--pre-js', 'pre2.js']).communicate()
      self.assertContained('pre-run\nhello from main\npost-run\n', run_js(os.path.join(self.get_dir(), 'a.out.js')))

    def test_prepre(self):
      open(os.path.join(self.get_dir(), 'main.cpp'), 'w').write('''
        #include <stdio.h>
        int main() {
          printf("hello from main\\n");
          return 0;
        }
      ''')
      open(os.path.join(self.get_dir(), 'pre.js'), 'w').write('''
        var Module = {
          preRun: [function() { Module.print('pre-run') }],
        };
      ''')
      open(os.path.join(self.get_dir(), 'pre2.js'), 'w').write('''
        Module.preRun.push(function() { Module.print('prepre') });
      ''')
      Popen([PYTHON, EMCC, os.path.join(self.get_dir(), 'main.cpp'), '--pre-js', 'pre.js', '--pre-js', 'pre2.js']).communicate()
      self.assertContained('prepre\npre-run\nhello from main\n', run_js(os.path.join(self.get_dir(), 'a.out.js')))

    def test_save_bc(self):
      for save in [0, 1]:
        self.clear()
        Popen([PYTHON, EMCC, path_from_root('tests', 'hello_world_loop_malloc.cpp')] + ([] if not save else ['--save-bc', self.in_dir('my_bitcode.bc')])).communicate()
        assert 'hello, world!' in run_js(self.in_dir('a.out.js'))
        assert os.path.exists(self.in_dir('my_bitcode.bc')) == save
        if save:
          try_delete('a.out.js')
          Building.llvm_dis(self.in_dir('my_bitcode.bc'), self.in_dir('my_ll.ll'))
          try:
            os.environ['EMCC_LEAVE_INPUTS_RAW'] = '1'
            Popen([PYTHON, EMCC, 'my_ll.ll', '-o', 'two.js']).communicate()
            assert 'hello, world!' in run_js(self.in_dir('two.js'))
          finally:
            del os.environ['EMCC_LEAVE_INPUTS_RAW']

    def test_fix_closure(self):
      input = path_from_root('tests', 'test-fix-closure.js')
      expected = path_from_root('tests', 'test-fix-closure.out.js')
      Popen([PYTHON, path_from_root('tools', 'fix_closure.py'), input, 'out.js']).communicate(input)
      output = open('out.js').read()
      assert '0,zzz_Q_39fa,0' in output
      assert 'function(a,c)' not in output # should be uninlined, so it gets a name
      assert run_js(input) == run_js('out.js')

    def test_js_optimizer(self):
      for input, expected, passes in [
        (path_from_root('tools', 'test-js-optimizer.js'), open(path_from_root('tools', 'test-js-optimizer-output.js')).read(),
         ['hoistMultiples', 'loopOptimizer', 'removeAssignsToUndefined', 'simplifyExpressionsPre', 'simplifyExpressionsPost']),
        (path_from_root('tools', 'test-js-optimizer-t2c.js'), open(path_from_root('tools', 'test-js-optimizer-t2c-output.js')).read(),
         ['simplifyExpressionsPre', 'optimizeShiftsConservative']),
        (path_from_root('tools', 'test-js-optimizer-t2.js'), open(path_from_root('tools', 'test-js-optimizer-t2-output.js')).read(),
         ['simplifyExpressionsPre', 'optimizeShiftsAggressive']),
        # Make sure that optimizeShifts handles functions with shift statements.
        (path_from_root('tools', 'test-js-optimizer-t3.js'), open(path_from_root('tools', 'test-js-optimizer-t3-output.js')).read(),
         ['optimizeShiftsAggressive']),
        (path_from_root('tools', 'test-js-optimizer-regs.js'), open(path_from_root('tools', 'test-js-optimizer-regs-output.js')).read(),
         ['registerize']),
        (path_from_root('tools', 'eliminator', 'eliminator-test.js'), open(path_from_root('tools', 'eliminator', 'eliminator-test-output.js')).read(),
         ['eliminate']),
        (path_from_root('tools', 'eliminator', 'safe-eliminator-test.js'), open(path_from_root('tools', 'eliminator', 'safe-eliminator-test-output.js')).read(),
         ['eliminateMemSafe']),
        (path_from_root('tools', 'eliminator', 'asm-eliminator-test.js'), open(path_from_root('tools', 'eliminator', 'asm-eliminator-test-output.js')).read(),
         ['asm', 'eliminate']),
        (path_from_root('tools', 'test-js-optimizer-asm-regs.js'), open(path_from_root('tools', 'test-js-optimizer-asm-regs-output.js')).read(),
         ['asm', 'registerize']),
        (path_from_root('tools', 'test-js-optimizer-asm-regs-min.js'), open(path_from_root('tools', 'test-js-optimizer-asm-regs-min-output.js')).read(),
         ['asm', 'registerize']),
        (path_from_root('tools', 'test-js-optimizer-asm-pre.js'), open(path_from_root('tools', 'test-js-optimizer-asm-pre-output.js')).read(),
         ['asm', 'simplifyExpressionsPre']),
        (path_from_root('tools', 'test-js-optimizer-asm-last.js'), open(path_from_root('tools', 'test-js-optimizer-asm-last-output.js')).read(),
         ['asm', 'last']),
      ]:
        print input
        output = Popen(listify(NODE_JS) + [path_from_root('tools', 'js-optimizer.js'), input] + passes, stdin=PIPE, stdout=PIPE).communicate()[0]
        self.assertIdentical(expected, output.replace('\r\n', '\n').replace('\n\n', '\n'))

    def test_m_mm(self):
      open(os.path.join(self.get_dir(), 'foo.c'), 'w').write('''#include <emscripten.h>''')
      for opt in ['M', 'MM']:
        output, err = Popen([PYTHON, EMCC, os.path.join(self.get_dir(), 'foo.c'), '-' + opt], stdout=PIPE, stderr=PIPE).communicate()
        assert 'foo.o: ' in output, '-%s failed to produce the right output: %s' % (opt, output)
        assert 'error' not in err, 'Unexpected stderr: ' + err

    def test_chunking(self):
      if os.environ.get('EMCC_DEBUG'): return self.skip('cannot run in debug mode')
      if multiprocessing.cpu_count() < 2: return self.skip('need multiple cores')
      try:
        os.environ['EMCC_DEBUG'] = '1'
        for asm, linkable, chunks, js_chunks in [
            (0, 0, 3, 2), (0, 1, 3, 4),
            (1, 0, 3, 2), (1, 1, 3, 4)
          ]:
          print asm, linkable, chunks, js_chunks
          output, err = Popen([PYTHON, EMCC, path_from_root('tests', 'hello_libcxx.cpp'), '-O1', '-s', 'LINKABLE=%d' % linkable, '-s', 'ASM_JS=%d' % asm, '-s', 'UNRESOLVED_AS_DEAD=1'], stdout=PIPE, stderr=PIPE).communicate()
          ok = False
          for c in range(chunks, chunks+2):
            ok = ok or ('phase 2 working on %d chunks' % c in err)
          assert ok, err
          ok = False
          for c in range(js_chunks, js_chunks+2):
            ok = ok or ('splitting up js optimization into %d chunks' % c in err)
          assert ok, err
      finally:
        del os.environ['EMCC_DEBUG']

    def test_debuginfo(self):
      if os.environ.get('EMCC_DEBUG'): return self.skip('cannot run in debug mode')
      try:
        os.environ['EMCC_DEBUG'] = '1'
        # llvm debug info is kept only when we can see it, which is without the js optimize, -O0. js debug info is lost by registerize in -O2, so - g disables it
        for args, expect_llvm, expect_js in [
            (['-O0'], True, True),
            (['-O0', '-g'], True, True),
            (['-O1'], False, True),
            (['-O1', '-g'], False, True),
            (['-O2'], False, False),
            (['-O2', '-g'], False, True),
          ]:
          print args, expect_llvm, expect_js
          output, err = Popen([PYTHON, EMCC, path_from_root('tests', 'hello_world.cpp')] + args, stdout=PIPE, stderr=PIPE).communicate()
          assert expect_llvm == ('strip-debug' not in err)
          assert expect_js == ('registerize' not in err)
      finally:
        del os.environ['EMCC_DEBUG']

    def test_scons(self): # also incidentally tests c++11 integration in llvm 3.1
      try_delete(os.path.join(self.get_dir(), 'test'))
      shutil.copytree(path_from_root('tests', 'scons'), os.path.join(self.get_dir(), 'test'))
      shutil.copytree(path_from_root('tools', 'scons', 'site_scons'), os.path.join(self.get_dir(), 'test', 'site_scons'))
      os.chdir(os.path.join(self.get_dir(), 'test'))
      Popen(['scons']).communicate()
      output = run_js('scons_integration.js')
      assert 'If you see this - the world is all right!' in output

    def test_embind(self):
      for args, fail in [
        ([], True), # without --bind, we fail
        (['--bind'], False),
        (['--bind', '-O1'], False)
        # XXX TODO (['--bind', '-O2'], False)
      ]:
        print args, fail
        self.clear()
        try_delete(self.in_dir('a.out.js'))
        Popen([PYTHON, EMCC, path_from_root('tests', 'embind', 'embind_test.cpp'), '--post-js', path_from_root('tests', 'embind', 'embind_test.js')] + args, stderr=PIPE if fail else None).communicate()
        assert os.path.exists(self.in_dir('a.out.js')) == (not fail)
        if not fail:
          output = run_js(self.in_dir('a.out.js'))
          self.assertContained('''fixture: embind
--test: test value creation
--test: test passthrough
--test: test void return converts to undefined
--test: test booleans can be marshalled
--test: test convert double to unsigned
--test: test get length of array
--test: test add a bunch of things
--test: test sum array
--test: test strings
--test: test no memory leak when passing strings in by const reference
fixture: classes
--test: test class instance
--test: test class methods
--test: test can't call methods on deleted class instances
--test: test isinstance
--test: test can return class instances by value
--test: test can pass class instances to functions by reference
--test: test can access struct fields
--test: test can set struct fields
--test: test assignment returns value
--test: test assigning string to integer raises TypeError
--test: test can return tuples by value
--test: test tuples can contain tuples
--test: test can pass tuples by value
--test: test can return structs by value
--test: test can pass structs by value
--test: test can pass and return tuples in structs
--test: test can clone handles
--test: test can't clone if already deleted
--test: test moving handles is a clone+delete
--test: test StringHolder
fixture: embind enumerations
--test: test can compare enumeration values
--test: test repr includes enum value
--test: test instanceof
--test: test can pass and return enumeration values to functions
fixture: C++11 enum class
--test: test can compare enumeration values
--test: test repr includes enum value
--test: test instanceof
--test: test can pass and return enumeration values to functions
fixture: emval call tests
--test: test can call functions from C++
fixture: interfaces
--test: test can wrap JS object in native interface
--test: test can pass arguments and return complicated values
--test: test can call interface methods that return nothing''', output)

    def test_llvm_nativizer(self):
      try:
        Popen(['as', '--version'], stdout=PIPE, stderr=PIPE).communicate()
      except:
        return self.skip('no gnu as, cannot run nativizer')

      # avoid impure_ptr problems etc.
      shutil.copyfile(path_from_root('tests', 'files.cpp'), os.path.join(self.get_dir(), 'files.cpp'))
      open(os.path.join(self.get_dir(), 'somefile.binary'), 'w').write('''waka waka############################''')
      open(os.path.join(self.get_dir(), 'test.file'), 'w').write('''ay file..............,,,,,,,,,,,,,,''')
      open(os.path.join(self.get_dir(), 'stdin'), 'w').write('''inter-active''')
      Popen([PYTHON, EMCC, os.path.join(self.get_dir(), 'files.cpp'), '-c']).communicate()
      Popen([PYTHON, path_from_root('tools', 'nativize_llvm.py'), os.path.join(self.get_dir(), 'files.o')]).communicate(input)[0]
      output = Popen([os.path.join(self.get_dir(), 'files.o.run')], stdin=open(os.path.join(self.get_dir(), 'stdin')), stdout=PIPE, stderr=PIPE).communicate()
      self.assertContained('''size: 37
data: 119,97,107,97,32,119,97,107,97,35,35,35,35,35,35,35,35,35,35,35,35,35,35,35,35,35,35,35,35,35,35,35,35,35,35,35,35
loop: 119 97 107 97 32 119 97 107 97 35 35 35 35 35 35 35 35 35 35 35 35 35 35 35 35 35 35 35 35 35 35 35 35 35 35 35 35 
input:inter-active
texto
$
5 : 10,30,20,11,88
other=ay file...
seeked= file.
''', output[0])
      self.assertIdentical('texte\n', output[1])

    def test_emconfig(self):
      output = Popen([PYTHON, EMCONFIG, 'LLVM_ROOT'], stdout=PIPE, stderr=PIPE).communicate()[0].strip()
      try:
        assert output == LLVM_ROOT
      except:
        print >> sys.stderr, 'Assertion failed: python %s LLVM_ROOT returned "%s" instead of expected "%s"!' % (EMCONFIG, output, LLVM_ROOT)
        raise
      invalid = 'Usage: em-config VAR_NAME'
      # Don't accept variables that do not exist
      output = Popen([PYTHON, EMCONFIG, 'VAR_WHICH_DOES_NOT_EXIST'], stdout=PIPE, stderr=PIPE).communicate()[0].strip()
      assert output == invalid
      # Don't accept no arguments
      output = Popen([PYTHON, EMCONFIG], stdout=PIPE, stderr=PIPE).communicate()[0].strip()
      assert output == invalid
      # Don't accept more than one variable
      output = Popen([PYTHON, EMCONFIG, 'LLVM_ROOT', 'EMCC'], stdout=PIPE, stderr=PIPE).communicate()[0].strip()
      assert output == invalid
      # Don't accept arbitrary python code
      output = Popen([PYTHON, EMCONFIG, 'sys.argv[1]'], stdout=PIPE, stderr=PIPE).communicate()[0].strip()
      assert output == invalid

    def test_link_s(self):
      # -s OPT=VALUE can conflict with -s as a linker option. We warn and ignore
      open(os.path.join(self.get_dir(), 'main.cpp'), 'w').write(r'''
        extern "C" {
          void something();
        }

        int main() {
          something();
          return 0;
        }
      ''')
      open(os.path.join(self.get_dir(), 'supp.cpp'), 'w').write(r'''
        #include <stdio.h>

        extern "C" {
          void something() {
            printf("yello\n");
          }
        }
      ''')
      Popen([PYTHON, EMCC, os.path.join(self.get_dir(), 'main.cpp'), '-o', 'main.o']).communicate()
      Popen([PYTHON, EMCC, os.path.join(self.get_dir(), 'supp.cpp'), '-o', 'supp.o']).communicate()

      output = Popen([PYTHON, EMCC, os.path.join(self.get_dir(), 'main.o'), '-s', os.path.join(self.get_dir(), 'supp.o'), '-s', 'SAFE_HEAP=1'], stderr=PIPE).communicate()
      self.assertContained('emcc: warning: treating -s as linker option', output[1])
      output = run_js('a.out.js')
      assert 'yello' in output, 'code works'
      code = open('a.out.js').read()
      assert 'SAFE_HEAP' in code, 'valid -s option had an effect'

    def test_optimize_normally(self):
      assert not os.environ.get('EMCC_OPTIMIZE_NORMALLY')
      assert not os.environ.get('EMCC_DEBUG')

      for optimize_normally in [0, 1]:
        print optimize_normally
        try:
          if optimize_normally: os.environ['EMCC_OPTIMIZE_NORMALLY'] = '1'
          os.environ['EMCC_DEBUG'] = '1'

          open(self.in_dir('main.cpp'), 'w').write(r'''
            extern "C" {
              void something();
            }

            int main() {
              something();
              return 0;
            }
          ''')
          open(self.in_dir('supp.cpp'), 'w').write(r'''
            #include <stdio.h>

            extern "C" {
              void something() {
                printf("yello\n");
              }
            }
          ''')
          out, err = Popen([PYTHON, EMCC, self.in_dir('main.cpp'), '-O2', '-o', 'main.o'], stdout=PIPE, stderr=PIPE).communicate()
          assert ("emcc: LLVM opts: ['-O3']" in err) == optimize_normally
          assert (' with -O3 since EMCC_OPTIMIZE_NORMALLY defined' in err) == optimize_normally

          out, err = Popen([PYTHON, EMCC, self.in_dir('supp.cpp'), '-O2', '-o', 'supp.o'], stdout=PIPE, stderr=PIPE).communicate()
          assert ("emcc: LLVM opts: ['-O3']" in err) == optimize_normally
          assert (' with -O3 since EMCC_OPTIMIZE_NORMALLY defined' in err) == optimize_normally

          out, err = Popen([PYTHON, EMCC, self.in_dir('main.o'), self.in_dir('supp.o'), '-O2', '-o', 'both.o'], stdout=PIPE, stderr=PIPE).communicate()
          assert "emcc: LLVM opts: ['-O3']" not in err
          assert ' with -O3 since EMCC_OPTIMIZE_NORMALLY defined' not in err
          assert ('despite EMCC_OPTIMIZE_NORMALLY since not source code' in err) == optimize_normally

          out, err = Popen([PYTHON, EMCC, self.in_dir('main.cpp'), self.in_dir('supp.cpp'), '-O2', '-o', 'both2.o'], stdout=PIPE, stderr=PIPE).communicate()
          assert ("emcc: LLVM opts: ['-O3']" in err) == optimize_normally
          assert (' with -O3 since EMCC_OPTIMIZE_NORMALLY defined' in err) == optimize_normally

          for last in ['both.o', 'both2.o']:
            out, err = Popen([PYTHON, EMCC, self.in_dir('both.o'), '-O2', '-o', last + '.js'], stdout=PIPE, stderr=PIPE).communicate()
            assert ("emcc: LLVM opts: ['-O3']" not in err) == optimize_normally
            assert ' with -O3 since EMCC_OPTIMIZE_NORMALLY defined' not in err
            output = run_js(last + '.js')
            assert 'yello' in output, 'code works'
          assert open('both.o.js').read() == open('both2.o.js').read()

        finally:
          if optimize_normally: del os.environ['EMCC_OPTIMIZE_NORMALLY']
          del os.environ['EMCC_DEBUG']

    def test_jcache_printf(self):
      open(self.in_dir('src.cpp'), 'w').write(r'''
        #include <stdio.h>
        #include <stdint.h>
        #include <emscripten.h>
        int main() {
          emscripten_jcache_printf("hello world\n");
          emscripten_jcache_printf("hello %d world\n", 5);
          emscripten_jcache_printf("hello %.3f world\n", 123.456789123);
          emscripten_jcache_printf("hello %llx world\n", 0x1234567811223344ULL);
          return 0;
        }
      ''')
      Popen([PYTHON, EMCC, self.in_dir('src.cpp')]).communicate()
      output = run_js('a.out.js')
      self.assertIdentical('hello world\nhello 5 world\nhello 123.457 world\nhello 1234567811223300 world\n', output)

    def test_conftest_s_flag_passing(self):
      open(os.path.join(self.get_dir(), 'conftest.c'), 'w').write(r'''
        int main() {
          return 0;
        }
      ''')
      os.environ["EMMAKEN_JUST_CONFIGURE"] = "1"
      cmd = [PYTHON, EMCC, '-s', 'ASSERTIONS=1', os.path.join(self.get_dir(), 'conftest.c'), '-o', 'conftest']
      output = Popen(cmd, stderr=PIPE).communicate()
      del os.environ["EMMAKEN_JUST_CONFIGURE"]
      self.assertNotContained('emcc: warning: treating -s as linker option', output[1])
      assert os.path.exists('conftest')

    def test_crunch(self):
      # crunch should not be run if a .crn exists that is more recent than the .dds
      shutil.copyfile(path_from_root('tests', 'ship.dds'), 'ship.dds')
      time.sleep(0.1)
      Popen([PYTHON, FILE_PACKAGER, 'test.data', '--pre-run', '--crunch=32', '--preload', 'ship.dds'], stdout=open('pre.js', 'w')).communicate()
      assert os.stat('test.data').st_size < 0.25*os.stat('ship.dds').st_size, 'Compressed should be much smaller than dds'
      crunch_time = os.stat('ship.crn').st_mtime
      dds_time = os.stat('ship.dds').st_mtime
      assert crunch_time > dds_time, 'Crunch is more recent'
      # run again, should not recrunch!
      time.sleep(0.1)
      Popen([PYTHON, FILE_PACKAGER, 'test.data', '--pre-run', '--crunch=32', '--preload', 'ship.dds'], stdout=open('pre.js', 'w')).communicate()
      assert crunch_time == os.stat('ship.crn').st_mtime, 'Crunch is unchanged'
      # update dds, so should recrunch
      time.sleep(0.1)
      os.utime('ship.dds', None)
      Popen([PYTHON, FILE_PACKAGER, 'test.data', '--pre-run', '--crunch=32', '--preload', 'ship.dds'], stdout=open('pre.js', 'w')).communicate()
      assert crunch_time < os.stat('ship.crn').st_mtime, 'Crunch was changed'

    def test_headless(self):
      if SPIDERMONKEY_ENGINE not in JS_ENGINES: return self.skip('cannot run without spidermonkey due to node limitations (Uint8ClampedArray etc.)')

      shutil.copyfile(path_from_root('tests', 'screenshot.png'), os.path.join(self.get_dir(), 'example.png'))
      Popen([PYTHON, EMCC, path_from_root('tests', 'sdl_canvas.c'), '-s', 'HEADLESS=1']).communicate()
      output = run_js('a.out.js', engine=SPIDERMONKEY_ENGINE, stderr=PIPE)
      assert '''Init: 0
Font: 0x1
Sum: 0
you should see two lines of text in different colors and a blue rectangle
SDL_Quit called (and ignored)
done.
''' in output, output

elif 'browser' in str(sys.argv):
  # Browser tests.

  ''' Enable this code to run in another browser than webbrowser detects as default
  def run_in_other_browser(url):
    execute(['yourbrowser', url])
  webbrowser.open_new = run_in_other_browser
  '''

  print
  print 'Running the browser tests. Make sure the browser allows popups from localhost.'
  print

  # Run a server and a web page. When a test runs, we tell the server about it,
  # which tells the web page, which then opens a window with the test. Doing
  # it this way then allows the page to close() itself when done.

  def harness_server_func(q):
    class TestServerHandler(BaseHTTPServer.BaseHTTPRequestHandler):
      def do_GET(s):
        s.send_response(200)
        s.send_header("Content-type", "text/html")
        s.end_headers()
        if s.path == '/run_harness':
          s.wfile.write(open(path_from_root('tests', 'browser_harness.html')).read())
        else:
          result = 'False'
          if not q.empty():
            result = q.get()
          s.wfile.write(result)
        s.wfile.close()
    httpd = BaseHTTPServer.HTTPServer(('localhost', 9999), TestServerHandler)
    httpd.serve_forever() # test runner will kill us

  def server_func(dir, q):
    class TestServerHandler(BaseHTTPServer.BaseHTTPRequestHandler):
      def do_GET(s):
        if 'report_' in s.path:
          q.put(s.path)
        else:
          filename = s.path[1:]
          if os.path.exists(filename):
            s.send_response(200)
            s.send_header("Content-type", "text/html")
            s.end_headers()
            s.wfile.write(open(filename).read())
            s.wfile.close()
          else:
            s.send_response(500)
            s.send_header("Content-type", "text/html")
            s.end_headers()
    os.chdir(dir)
    httpd = BaseHTTPServer.HTTPServer(('localhost', 8888), TestServerHandler)
    httpd.serve_forever() # test runner will kill us

  class browser(RunnerCore):
    def __init__(self, *args, **kwargs):
      super(browser, self).__init__(*args, **kwargs)

      if hasattr(browser, 'harness_server'): return
      browser.harness_queue = multiprocessing.Queue()
      browser.harness_server = multiprocessing.Process(target=harness_server_func, args=(browser.harness_queue,))
      browser.harness_server.start()
      print '[Browser harness server on process %d]' % browser.harness_server.pid
      webbrowser.open_new('http://localhost:9999/run_harness')

    def __del__(self):
      if not hasattr(browser, 'harness_server'): return

      browser.harness_server.terminate()
      delattr(browser, 'harness_server')
      print '[Browser harness server terminated]'
      # On Windows, shutil.rmtree() in tearDown() raises this exception if we do not wait a bit:
      # WindowsError: [Error 32] The process cannot access the file because it is being used by another process.
      time.sleep(0.1)
      
    def run_browser(self, html_file, message, expectedResult=None):
      if expectedResult is not None:
        try:
          queue = multiprocessing.Queue()
          server = multiprocessing.Process(target=functools.partial(server_func, self.get_dir()), args=(queue,))
          server.start()
          browser.harness_queue.put('http://localhost:8888/' + html_file)
          output = '[no http server activity]'
          start = time.time()
          while time.time() - start < 60:
            if not queue.empty():
              output = queue.get()
              break
            time.sleep(0.1)

          self.assertIdentical(expectedResult, output)
        finally:
          server.terminate()
          time.sleep(0.1) # see comment about Windows above
      else:
        webbrowser.open_new(os.path.abspath(html_file))
        print 'A web browser window should have opened a page containing the results of a part of this test.'
        print 'You need to manually look at the page to see that it works ok: ' + message
        print '(sleeping for a bit to keep the directory alive for the web browser..)'
        time.sleep(5)
        print '(moving on..)'

    def with_report_result(self, code):
      return r'''
        #if EMSCRIPTEN
        #include <emscripten.h>
        #define REPORT_RESULT_INTERNAL(sync) \
          char output[1000]; \
          sprintf(output, \
                  "xhr = new XMLHttpRequest();" \
                  "xhr.open('GET', 'http://localhost:8888/report_result?%d'%s);" \
                  "xhr.send();", result, sync ? ", false" : ""); \
          emscripten_run_script(output); \
          emscripten_run_script("setTimeout(function() { window.close() }, 1000)"); // comment this out to keep the test runner window open to debug
        #define REPORT_RESULT() REPORT_RESULT_INTERNAL(0)
        #endif
''' + code

    def reftest(self, expected):
      basename = os.path.basename(expected)
      shutil.copyfile(expected, os.path.join(self.get_dir(), basename))
      open(os.path.join(self.get_dir(), 'reftest.js'), 'w').write('''
        function doReftest() {
          if (doReftest.done) return;
          doReftest.done = true;
          var img = new Image();
          img.onload = function() {
            assert(img.width == Module.canvas.width, 'Invalid width: ' + Module.canvas.width + ', should be ' + img.width);
            assert(img.height == Module.canvas.height, 'Invalid height: ' + Module.canvas.height + ', should be ' + img.height);

            var canvas = document.createElement('canvas');
            canvas.width = img.width;
            canvas.height = img.height;
            var ctx = canvas.getContext('2d');
            ctx.drawImage(img, 0, 0);
            var expected = ctx.getImageData(0, 0, img.width, img.height).data;

            var actualUrl = Module.canvas.toDataURL();
            var actualImage = new Image();
            actualImage.onload = function() {
              var actualCanvas = document.createElement('canvas');
              actualCanvas.width = actualImage.width;
              actualCanvas.height = actualImage.height;
              var actualCtx = actualCanvas.getContext('2d');
              actualCtx.drawImage(actualImage, 0, 0);
              var actual = actualCtx.getImageData(0, 0, actualImage.width, actualImage.height).data;

              var total = 0;
              var width = img.width;
              var height = img.height;
              for (var x = 0; x < width; x++) {
                for (var y = 0; y < height; y++) {
                  total += Math.abs(expected[y*width*4 + x*4 + 0] - actual[y*width*4 + x*4 + 0]);
                  total += Math.abs(expected[y*width*4 + x*4 + 1] - actual[y*width*4 + x*4 + 1]);
                  total += Math.abs(expected[y*width*4 + x*4 + 2] - actual[y*width*4 + x*4 + 2]);
                }
              }
              var wrong = Math.floor(total / (img.width*img.height*3)); // floor, to allow some margin of error for antialiasing

              xhr = new XMLHttpRequest();
              xhr.open('GET', 'http://localhost:8888/report_result?' + wrong);
              xhr.send();
              setTimeout(function() { window.close() }, 1000);
            };
            actualImage.src = actualUrl;
          }
          img.src = '%s';
        };
        Module['postRun'] = doReftest;
        Module['preRun'].push(function() {
          setTimeout(doReftest, 1000); // if run() throws an exception and postRun is not called, this will kick in
        });
''' % basename)

    def test_html(self):
      # test HTML generation.
      self.reftest(path_from_root('tests', 'htmltest.png'))
      output = Popen([PYTHON, EMCC, path_from_root('tests', 'hello_world_sdl.cpp'), '-o', 'something.html',  '--pre-js', 'reftest.js']).communicate()
      self.run_browser('something.html', 'You should see "hello, world!" and a colored cube.', '/report_result?0')

    def build_native_lzma(self):
      lzma_native = path_from_root('third_party', 'lzma.js', 'lzma-native')
      if os.path.isfile(lzma_native) and os.access(lzma_native, os.X_OK): return

      cwd = os.getcwd()
      try:
        os.chdir(path_from_root('third_party', 'lzma.js'))
        Popen(['sh', './doit.sh']).communicate()
      finally:
        os.chdir(cwd)

    def test_split(self):
      # test HTML generation.
      self.reftest(path_from_root('tests', 'htmltest.png'))
      output = Popen([PYTHON, EMCC, path_from_root('tests', 'hello_world_sdl.cpp'), '-o', 'something.js', '--split', '100', '--pre-js', 'reftest.js']).communicate()
      assert os.path.exists(os.path.join(self.get_dir(), 'something.js')), 'must be main js file'
      assert os.path.exists(os.path.join(self.get_dir(), 'something_functions.js')), 'must be functions js file'
      assert os.path.exists(os.path.join(self.get_dir(), 'something.include.html')), 'must be js include file'
      
      open(os.path.join(self.get_dir(), 'something.html'), 'w').write('''
      
      <!doctype html>
      <html lang="en-us">
        <head>
          <meta charset="utf-8">
          <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
          <title>Emscripten-Generated Code</title>
          <style>
            .emscripten { padding-right: 0; margin-left: auto; margin-right: auto; display: block; }
            canvas.emscripten { border: 1px solid black; }
            textarea.emscripten { font-family: monospace; width: 80%; }
            div.emscripten { text-align: center; }
          </style>
        </head>
        <body>
          <hr/>
          <div class="emscripten" id="status">Downloading...</div>
          <div class="emscripten">
            <progress value="0" max="100" id="progress" hidden=1></progress>  
          </div>
          <canvas class="emscripten" id="canvas" oncontextmenu="event.preventDefault()"></canvas>
          <hr/>
          <div class="emscripten"><input type="button" value="fullscreen" onclick="Module.requestFullScreen()"></div>
          <hr/>
          <textarea class="emscripten" id="output" rows="8"></textarea>
          <hr>
          <script type='text/javascript'>
            // connect to canvas
            var Module = {
              preRun: [],
              postRun: [],
              print: (function() {
                var element = document.getElementById('output');
                element.value = ''; // clear browser cache
                return function(text) {
                  // These replacements are necessary if you render to raw HTML
                  //text = text.replace(/&/g, "&amp;");
                  //text = text.replace(/</g, "&lt;");
                  //text = text.replace(/>/g, "&gt;");
                  //text = text.replace('\\n', '<br>', 'g');
                  element.value += text + "\\n";
                  element.scrollTop = 99999; // focus on bottom
                };
              })(),
              printErr: function(text) {
                if (0) { // XXX disabled for safety typeof dump == 'function') {
                  dump(text + '\\n'); // fast, straight to the real console
                } else {
                  console.log(text);
                }
              },
              canvas: document.getElementById('canvas'),
              setStatus: function(text) {
                if (Module.setStatus.interval) clearInterval(Module.setStatus.interval);
                var m = text.match(/([^(]+)\((\d+(\.\d+)?)\/(\d+)\)/);
                var statusElement = document.getElementById('status');
                var progressElement = document.getElementById('progress');
                if (m) {
                  text = m[1];
                  progressElement.value = parseInt(m[2])*100;
                  progressElement.max = parseInt(m[4])*100;
                  progressElement.hidden = false;
                } else {
                  progressElement.value = null;
                  progressElement.max = null;
                  progressElement.hidden = true;
                }
                statusElement.innerHTML = text;
              },
              totalDependencies: 0,
              monitorRunDependencies: function(left) {
                this.totalDependencies = Math.max(this.totalDependencies, left);
                Module.setStatus(left ? 'Preparing... (' + (this.totalDependencies-left) + '/' + this.totalDependencies + ')' : 'All downloads complete.');
              }
            };
            Module.setStatus('Downloading...');
          </script>''' + open(os.path.join(self.get_dir(), 'something.include.html')).read() + '''
        </body>
      </html>
      ''')
      
      self.run_browser('something.html', 'You should see "hello, world!" and a colored cube.', '/report_result?0')

    def test_split_in_source_filenames(self):
      self.reftest(path_from_root('tests', 'htmltest.png'))
      output = Popen([PYTHON, EMCC, path_from_root('tests', 'hello_world_sdl.cpp'), '-o', 'something.js', '-g', '--split', '100', '--pre-js', 'reftest.js']).communicate()
      assert os.path.exists(os.path.join(self.get_dir(), 'something.js')), 'must be main js file'
      assert os.path.exists(self.get_dir() + '/something/' + path_from_root('tests', 'hello_world_sdl.cpp.js')), 'must be functions js file'
      assert os.path.exists(os.path.join(self.get_dir(), 'something.include.html')), 'must be js include file'

      open(os.path.join(self.get_dir(), 'something.html'), 'w').write('''

      <!doctype html>
      <html lang="en-us">
        <head>
          <meta charset="utf-8">
          <meta http-equiv="Content-Type" content="text/html; charset=utf-8">
          <title>Emscripten-Generated Code</title>
          <style>
            .emscripten { padding-right: 0; margin-left: auto; margin-right: auto; display: block; }
            canvas.emscripten { border: 1px solid black; }
            textarea.emscripten { font-family: monospace; width: 80%; }
            div.emscripten { text-align: center; }
          </style>
        </head>
        <body>
          <hr/>
          <div class="emscripten" id="status">Downloading...</div>
          <div class="emscripten">
            <progress value="0" max="100" id="progress" hidden=1></progress>  
          </div>
          <canvas class="emscripten" id="canvas" oncontextmenu="event.preventDefault()"></canvas>
          <hr/>
          <div class="emscripten"><input type="button" value="fullscreen" onclick="Module.requestFullScreen()"></div>
          <hr/>
          <textarea class="emscripten" id="output" rows="8"></textarea>
          <hr>
          <script type='text/javascript'>
            // connect to canvas
            var Module = {
              preRun: [],
              postRun: [],
              print: (function() {
                var element = document.getElementById('output');
                element.value = ''; // clear browser cache
                return function(text) {
                  // These replacements are necessary if you render to raw HTML
                  //text = text.replace(/&/g, "&amp;");
                  //text = text.replace(/</g, "&lt;");
                  //text = text.replace(/>/g, "&gt;");
                  //text = text.replace('\\n', '<br>', 'g');
                  element.value += text + "\\n";
                  element.scrollTop = 99999; // focus on bottom
                };
              })(),
              printErr: function(text) {
                if (0) { // XXX disabled for safety typeof dump == 'function') {
                  dump(text + '\\n'); // fast, straight to the real console
                } else {
                  console.log(text);
                }
              },
              canvas: document.getElementById('canvas'),
              setStatus: function(text) {
                if (Module.setStatus.interval) clearInterval(Module.setStatus.interval);
                var m = text.match(/([^(]+)\((\d+(\.\d+)?)\/(\d+)\)/);
                var statusElement = document.getElementById('status');
                var progressElement = document.getElementById('progress');
                if (m) {
                  text = m[1];
                  progressElement.value = parseInt(m[2])*100;
                  progressElement.max = parseInt(m[4])*100;
                  progressElement.hidden = false;
                } else {
                  progressElement.value = null;
                  progressElement.max = null;
                  progressElement.hidden = true;
                }
                statusElement.innerHTML = text;
              },
              totalDependencies: 0,
              monitorRunDependencies: function(left) {
                this.totalDependencies = Math.max(this.totalDependencies, left);
                Module.setStatus(left ? 'Preparing... (' + (this.totalDependencies-left) + '/' + this.totalDependencies + ')' : 'All downloads complete.');
              }
            };
            Module.setStatus('Downloading...');
          </script>''' + open(os.path.join(self.get_dir(), 'something.include.html')).read() + '''
        </body>
      </html>
      ''')

      self.run_browser('something.html', 'You should see "hello, world!" and a colored cube.', '/report_result?0')

    def test_compression(self):
      open(os.path.join(self.get_dir(), 'main.cpp'), 'w').write(self.with_report_result(r'''
        #include <stdio.h>
        #include <emscripten.h>
        int main() {
          printf("hello compressed world\n");
          int result = 1;
          REPORT_RESULT();
          return 0;
        }
      '''))

      self.build_native_lzma()
      Popen([PYTHON, EMCC, os.path.join(self.get_dir(), 'main.cpp'), '-o', 'page.html',
             '--compression', '%s,%s,%s' % (path_from_root('third_party', 'lzma.js', 'lzma-native'),
                                            path_from_root('third_party', 'lzma.js', 'lzma-decoder.js'),
                                            'LZMA.decompress')]).communicate()
      assert os.path.exists(os.path.join(self.get_dir(), 'page.js')), 'must be side js'
      assert os.path.exists(os.path.join(self.get_dir(), 'page.js.compress')), 'must be side compressed js'
      assert os.stat(os.path.join(self.get_dir(), 'page.js')).st_size > os.stat(os.path.join(self.get_dir(), 'page.js.compress')).st_size, 'compressed file must be smaller'
      shutil.move(os.path.join(self.get_dir(), 'page.js'), 'page.js.renamedsoitcannotbefound');
      self.run_browser('page.html', '', '/report_result?1')

    def test_preload_file(self):
      open(os.path.join(self.get_dir(), 'somefile.txt'), 'w').write('''load me right before running the code please''')
      def make_main(path):
        print path
        open(os.path.join(self.get_dir(), 'main.cpp'), 'w').write(self.with_report_result(r'''
          #include <stdio.h>
          #include <string.h>
          #include <emscripten.h>
          int main() {
            FILE *f = fopen("%s", "r");
            char buf[100];
            fread(buf, 1, 20, f);
            buf[20] = 0;
            fclose(f);
            printf("|%%s|\n", buf);

            int result = !strcmp("load me right before", buf);
            REPORT_RESULT();
            return 0;
          }
        ''' % path))

      make_main('somefile.txt')
      Popen([PYTHON, EMCC, os.path.join(self.get_dir(), 'main.cpp'), '--preload-file', 'somefile.txt', '-o', 'page.html']).communicate()
      self.run_browser('page.html', 'You should see |load me right before|.', '/report_result?1')

      # By absolute path

      make_main(os.path.join(self.get_dir(), 'somefile.txt'))
      Popen([PYTHON, EMCC, os.path.join(self.get_dir(), 'main.cpp'), '--preload-file', os.path.join(self.get_dir(), 'somefile.txt'), '-o', 'page.html']).communicate()
      self.run_browser('page.html', 'You should see |load me right before|.', '/report_result?1')

      # Should still work with -o subdir/..

      make_main(os.path.join(self.get_dir(), 'somefile.txt'))
      try:
        os.mkdir(os.path.join(self.get_dir(), 'dirrey'))
      except:
        pass
      Popen([PYTHON, EMCC, os.path.join(self.get_dir(), 'main.cpp'), '--preload-file', os.path.join(self.get_dir(), 'somefile.txt'), '-o', 'dirrey/page.html']).communicate()
      self.run_browser('dirrey/page.html', 'You should see |load me right before|.', '/report_result?1')

      # With FS.preloadFile

      open(os.path.join(self.get_dir(), 'pre.js'), 'w').write('''
        Module.preRun = function() {
          FS.createPreloadedFile('/', 'someotherfile.txt', 'somefile.txt', true, false);
        };
      ''')
      make_main('someotherfile.txt')
      Popen([PYTHON, EMCC, os.path.join(self.get_dir(), 'main.cpp'), '--pre-js', 'pre.js', '-o', 'page.html']).communicate()
      self.run_browser('page.html', 'You should see |load me right before|.', '/report_result?1')

    def test_multifile(self):
      # a few files inside a directory
      self.clear()
      os.makedirs(os.path.join(self.get_dir(), 'subdirr'));
      os.makedirs(os.path.join(self.get_dir(), 'subdirr', 'moar'));
      open(os.path.join(self.get_dir(), 'subdirr', 'data1.txt'), 'w').write('''1214141516171819''')
      open(os.path.join(self.get_dir(), 'subdirr', 'moar', 'data2.txt'), 'w').write('''3.14159265358979''')
      open(os.path.join(self.get_dir(), 'main.cpp'), 'w').write(self.with_report_result(r'''
        #include <stdio.h>
        #include <string.h>
        #include <emscripten.h>
        int main() {
          char buf[17];

          FILE *f = fopen("subdirr/data1.txt", "r");
          fread(buf, 1, 16, f);
          buf[16] = 0;
          fclose(f);
          printf("|%s|\n", buf);
          int result = !strcmp("1214141516171819", buf);

          FILE *f2 = fopen("subdirr/moar/data2.txt", "r");
          fread(buf, 1, 16, f2);
          buf[16] = 0;
          fclose(f2);
          printf("|%s|\n", buf);
          result = result && !strcmp("3.14159265358979", buf);

          REPORT_RESULT();
          return 0;
        }
      '''))

      # by individual files
      Popen([PYTHON, EMCC, os.path.join(self.get_dir(), 'main.cpp'), '--preload-file', 'subdirr/data1.txt', '--preload-file', 'subdirr/moar/data2.txt', '-o', 'page.html']).communicate()
      self.run_browser('page.html', 'You should see two cool numbers', '/report_result?1')
      os.remove('page.html')

      # by directory, and remove files to make sure
      Popen([PYTHON, EMCC, os.path.join(self.get_dir(), 'main.cpp'), '--preload-file', 'subdirr', '-o', 'page.html']).communicate()
      shutil.rmtree(os.path.join(self.get_dir(), 'subdirr'))
      self.run_browser('page.html', 'You should see two cool numbers', '/report_result?1')

    def test_compressed_file(self):
      open(os.path.join(self.get_dir(), 'datafile.txt'), 'w').write('compress this please' + (2000*'.'))
      open(os.path.join(self.get_dir(), 'datafile2.txt'), 'w').write('moar' + (100*'!'))
      open(os.path.join(self.get_dir(), 'main.cpp'), 'w').write(self.with_report_result(r'''
        #include <stdio.h>
        #include <string.h>
        #include <emscripten.h>
        int main() {
          char buf[21];
          FILE *f = fopen("datafile.txt", "r");
          fread(buf, 1, 20, f);
          buf[20] = 0;
          fclose(f);
          printf("file says: |%s|\n", buf);
          int result = !strcmp("compress this please", buf);
          FILE *f2 = fopen("datafile2.txt", "r");
          fread(buf, 1, 5, f2);
          buf[5] = 0;
          fclose(f2);
          result = result && !strcmp("moar!", buf);
          printf("file 2 says: |%s|\n", buf);
          REPORT_RESULT();
          return 0;
        }
      '''))

      self.build_native_lzma()
      Popen([PYTHON, EMCC, os.path.join(self.get_dir(), 'main.cpp'), '-o', 'page.html', '--preload-file', 'datafile.txt', '--preload-file', 'datafile2.txt',
             '--compression', '%s,%s,%s' % (path_from_root('third_party', 'lzma.js', 'lzma-native'),
                                            path_from_root('third_party', 'lzma.js', 'lzma-decoder.js'),
                                            'LZMA.decompress')]).communicate()
      assert os.path.exists(os.path.join(self.get_dir(), 'datafile.txt')), 'must be data file'
      assert os.path.exists(os.path.join(self.get_dir(), 'page.data.compress')), 'must be data file in compressed form'
      assert os.stat(os.path.join(self.get_dir(), 'page.js')).st_size != os.stat(os.path.join(self.get_dir(), 'page.js.compress')).st_size, 'compressed file must be different'
      shutil.move(os.path.join(self.get_dir(), 'datafile.txt'), 'datafile.txt.renamedsoitcannotbefound');
      self.run_browser('page.html', '', '/report_result?1')

    def test_sdl_image(self):
      # load an image file, get pixel data. Also O2 coverage for --preload-file
      shutil.copyfile(path_from_root('tests', 'screenshot.jpg'), os.path.join(self.get_dir(), 'screenshot.jpg'))
      open(os.path.join(self.get_dir(), 'sdl_image.c'), 'w').write(self.with_report_result(open(path_from_root('tests', 'sdl_image.c')).read()))

      Popen([PYTHON, EMCC, os.path.join(self.get_dir(), 'sdl_image.c'), '-O2', '--preload-file', 'screenshot.jpg', '-o', 'page.html']).communicate()
      self.run_browser('page.html', '', '/report_result?600')

    def test_sdl_image_jpeg(self):
      shutil.copyfile(path_from_root('tests', 'screenshot.jpg'), os.path.join(self.get_dir(), 'screenshot.jpeg'))
      open(os.path.join(self.get_dir(), 'sdl_image_jpeg.c'), 'w').write(self.with_report_result(open(path_from_root('tests', 'sdl_image_jpeg.c')).read()))
      Popen([PYTHON, EMCC, os.path.join(self.get_dir(), 'sdl_image_jpeg.c'), '--preload-file', 'screenshot.jpeg', '-o', 'page.html']).communicate()
      self.run_browser('page.html', '', '/report_result?600')

    def test_sdl_image_compressed(self):
      for image, width in [(path_from_root('tests', 'screenshot2.png'), 300),
                           (path_from_root('tests', 'screenshot.jpg'), 600)]:
        self.clear()
        print image

        basename = os.path.basename(image)
        shutil.copyfile(image, os.path.join(self.get_dir(), basename))
        open(os.path.join(self.get_dir(), 'sdl_image.c'), 'w').write(self.with_report_result(open(path_from_root('tests', 'sdl_image.c')).read()).replace('screenshot.jpg', basename))

        self.build_native_lzma()
        Popen([PYTHON, EMCC, os.path.join(self.get_dir(), 'sdl_image.c'), '--preload-file', basename, '-o', 'page.html',
               '--compression', '%s,%s,%s' % (path_from_root('third_party', 'lzma.js', 'lzma-native'),
                                              path_from_root('third_party', 'lzma.js', 'lzma-decoder.js'),
                                              'LZMA.decompress')]).communicate()
        shutil.move(os.path.join(self.get_dir(), basename), basename + '.renamedsoitcannotbefound');
        self.run_browser('page.html', '', '/report_result?' + str(width))

    def test_sdl_image_prepare(self):
      # load an image file, get pixel data.
      shutil.copyfile(path_from_root('tests', 'screenshot.jpg'), os.path.join(self.get_dir(), 'screenshot.not'))
      self.btest('sdl_image_prepare.c', reference='screenshot.jpg', args=['--preload-file', 'screenshot.not'])

    def test_sdl_image_prepare_data(self):
      # load an image file, get pixel data.
      shutil.copyfile(path_from_root('tests', 'screenshot.jpg'), os.path.join(self.get_dir(), 'screenshot.not'))
      self.btest('sdl_image_prepare_data.c', reference='screenshot.jpg', args=['--preload-file', 'screenshot.not'])

    def test_sdl_canvas(self):
      open(os.path.join(self.get_dir(), 'sdl_canvas.c'), 'w').write(self.with_report_result(open(path_from_root('tests', 'sdl_canvas.c')).read()))

      Popen([PYTHON, EMCC, os.path.join(self.get_dir(), 'sdl_canvas.c'), '-o', 'page.html']).communicate()
      self.run_browser('page.html', '', '/report_result?1')

    def test_sdl_key(self):
      open(os.path.join(self.get_dir(), 'pre.js'), 'w').write('''
        Module.postRun = function() {
          function doOne() {
            Module._one();
            setTimeout(doOne, 1000/60);
          }
          setTimeout(doOne, 1000/60);
        }

        function simulateKeyEvent(c) {
          var event = document.createEvent("KeyboardEvent");
          event.initKeyEvent("keydown", true, true, window,
                             0, 0, 0, 0,
                             c, c);
          document.dispatchEvent(event);
          var event2 = document.createEvent("KeyboardEvent");
          event2.initKeyEvent("keyup", true, true, window,
                             0, 0, 0, 0,
                             c, c);
          document.dispatchEvent(event2);
        }
      ''')
      open(os.path.join(self.get_dir(), 'sdl_key.c'), 'w').write(self.with_report_result(open(path_from_root('tests', 'sdl_key.c')).read()))

      Popen([PYTHON, EMCC, os.path.join(self.get_dir(), 'sdl_key.c'), '-o', 'page.html', '--pre-js', 'pre.js', '-s', '''EXPORTED_FUNCTIONS=['_main', '_one']''']).communicate()
      self.run_browser('page.html', '', '/report_result?510510')

    def test_sdl_text(self):
      open(os.path.join(self.get_dir(), 'pre.js'), 'w').write('''
        Module.postRun = function() {
          function doOne() {
            Module._one();
            setTimeout(doOne, 1000/60);
          }
          setTimeout(doOne, 1000/60);
        }

        function simulateKeyEvent(charCode) {
          var event = document.createEvent("KeyboardEvent");
          event.initKeyEvent("keypress", true, true, window,
                             0, 0, 0, 0, 0, charCode);
          document.body.dispatchEvent(event);
        }
      ''')
      open(os.path.join(self.get_dir(), 'sdl_text.c'), 'w').write(self.with_report_result(open(path_from_root('tests', 'sdl_text.c')).read()))

      Popen([PYTHON, EMCC, os.path.join(self.get_dir(), 'sdl_text.c'), '-o', 'page.html', '--pre-js', 'pre.js', '-s', '''EXPORTED_FUNCTIONS=['_main', '_one']''']).communicate()
      self.run_browser('page.html', '', '/report_result?1')

    def test_sdl_mouse(self):
      open(os.path.join(self.get_dir(), 'pre.js'), 'w').write('''
        function simulateMouseEvent(x, y, button) {
          var event = document.createEvent("MouseEvents");
          if (button >= 0) {
            var event1 = document.createEvent("MouseEvents");
            event1.initMouseEvent('mousedown', true, true, window,
                       1, Module['canvas'].offsetLeft + x, Module['canvas'].offsetTop + y, Module['canvas'].offsetLeft + x, Module['canvas'].offsetTop + y,
                       0, 0, 0, 0,
                       button, null);
            Module['canvas'].dispatchEvent(event1);
            var event2 = document.createEvent("MouseEvents");
            event2.initMouseEvent('mouseup', true, true, window,
                       1, Module['canvas'].offsetLeft + x, Module['canvas'].offsetTop + y, Module['canvas'].offsetLeft + x, Module['canvas'].offsetTop + y,
                       0, 0, 0, 0,
                       button, null);
            Module['canvas'].dispatchEvent(event2);
          } else {
            var event1 = document.createEvent("MouseEvents");
            event1.initMouseEvent('mousemove', true, true, window,
                       0, Module['canvas'].offsetLeft + x, Module['canvas'].offsetTop + y, Module['canvas'].offsetLeft + x, Module['canvas'].offsetTop + y,
                       0, 0, 0, 0,
                       0, null);
            Module['canvas'].dispatchEvent(event1);
          }
        }
        window['simulateMouseEvent'] = simulateMouseEvent;
      ''')
      open(os.path.join(self.get_dir(), 'sdl_mouse.c'), 'w').write(self.with_report_result(open(path_from_root('tests', 'sdl_mouse.c')).read()))

      Popen([PYTHON, EMCC, os.path.join(self.get_dir(), 'sdl_mouse.c'), '-O2', '--minify', '0', '-o', 'page.html', '--pre-js', 'pre.js']).communicate()
      self.run_browser('page.html', '', '/report_result?740')

    def test_sdl_mouse_offsets(self):
      open(os.path.join(self.get_dir(), 'pre.js'), 'w').write('''
        function simulateMouseEvent(x, y, button) {
          var event = document.createEvent("MouseEvents");
          if (button >= 0) {
            var event1 = document.createEvent("MouseEvents");
            event1.initMouseEvent('mousedown', true, true, window,
                       1, x, y, x, y,
                       0, 0, 0, 0,
                       button, null);
            Module['canvas'].dispatchEvent(event1);
            var event2 = document.createEvent("MouseEvents");
            event2.initMouseEvent('mouseup', true, true, window,
                       1, x, y, x, y,
                       0, 0, 0, 0,
                       button, null);
            Module['canvas'].dispatchEvent(event2);
          } else {
            var event1 = document.createEvent("MouseEvents");
            event1.initMouseEvent('mousemove', true, true, window,
                       0, x, y, x, y,
                       0, 0, 0, 0,
                       0, null);
            Module['canvas'].dispatchEvent(event1);
          }
        }
        window['simulateMouseEvent'] = simulateMouseEvent;
      ''')
      open(os.path.join(self.get_dir(), 'page.html'), 'w').write('''
        <html>
          <head>
            <style type="text/css">
              html, body { margin: 0; padding: 0; }
              #container {
                position: absolute;
                left: 5px; right: 0;
                top: 5px; bottom: 0;
              }
              #canvas {
                position: absolute;
                left: 0; width: 600px;
                top: 0; height: 450px;
              }
              textarea {
                margin-top: 500px;
                margin-left: 5px;
                width: 600px;
              }
            </style>
          </head>
          <body>
            <div id="container">
              <canvas id="canvas"></canvas>
            </div>
            <textarea id="output" rows="8"></textarea>
            <script type="text/javascript">
              var Module = {
                canvas: document.getElementById('canvas'),
                print: (function() {
                  var element = document.getElementById('output');
                  element.value = ''; // clear browser cache
                  return function(text) {
                    text = Array.prototype.slice.call(arguments).join(' ');
                    element.value += text + "\\n";
                    element.scrollTop = 99999; // focus on bottom
                  };
                })()
              };
            </script>
            <script type="text/javascript" src="sdl_mouse.js"></script>
          </body>
        </html>
      ''')
      open(os.path.join(self.get_dir(), 'sdl_mouse.c'), 'w').write(self.with_report_result(open(path_from_root('tests', 'sdl_mouse.c')).read()))

      Popen([PYTHON, EMCC, os.path.join(self.get_dir(), 'sdl_mouse.c'), '-O2', '--minify', '0', '-o', 'sdl_mouse.js', '--pre-js', 'pre.js']).communicate()
      self.run_browser('page.html', '', '/report_result?600')

    def test_sdl_audio(self):
      shutil.copyfile(path_from_root('tests', 'sounds', 'alarmvictory_1.ogg'), os.path.join(self.get_dir(), 'sound.ogg'))
      shutil.copyfile(path_from_root('tests', 'sounds', 'alarmcreatemiltaryfoot_1.wav'), os.path.join(self.get_dir(), 'sound2.wav'))
      open(os.path.join(self.get_dir(), 'bad.ogg'), 'w').write('I claim to be audio, but am lying')
      open(os.path.join(self.get_dir(), 'sdl_audio.c'), 'w').write(self.with_report_result(open(path_from_root('tests', 'sdl_audio.c')).read()))

      # use closure to check for a possible bug with closure minifying away newer Audio() attributes
      Popen([PYTHON, EMCC, '-O2', '--minify', '0', os.path.join(self.get_dir(), 'sdl_audio.c'), '--preload-file', 'sound.ogg', '--preload-file', 'sound2.wav', '--preload-file', 'bad.ogg', '-o', 'page.html', '-s', 'EXPORTED_FUNCTIONS=["_main", "_play", "_play2"]']).communicate()
      self.run_browser('page.html', '', '/report_result?1')

    def test_sdl_audio_mix(self):
      shutil.copyfile(path_from_root('tests', 'sounds', 'pluck.ogg'), os.path.join(self.get_dir(), 'sound.ogg'))
      shutil.copyfile(path_from_root('tests', 'sounds', 'the_entertainer.ogg'), os.path.join(self.get_dir(), 'music.ogg'))
      open(os.path.join(self.get_dir(), 'sdl_audio_mix.c'), 'w').write(self.with_report_result(open(path_from_root('tests', 'sdl_audio_mix.c')).read()))

      # use closure to check for a possible bug with closure minifying away newer Audio() attributes
      Popen([PYTHON, EMCC, '-O2', '--minify', '0', os.path.join(self.get_dir(), 'sdl_audio_mix.c'), '--preload-file', 'sound.ogg', '--preload-file', 'music.ogg', '-o', 'page.html']).communicate()
      self.run_browser('page.html', '', '/report_result?1')

    def test_sdl_audio_quickload(self):
      open(os.path.join(self.get_dir(), 'sdl_audio_quickload.c'), 'w').write(self.with_report_result(open(path_from_root('tests', 'sdl_audio_quickload.c')).read()))

      # use closure to check for a possible bug with closure minifying away newer Audio() attributes
      Popen([PYTHON, EMCC, '-O2', '--minify', '0', os.path.join(self.get_dir(), 'sdl_audio_quickload.c'), '-o', 'page.html', '-s', 'EXPORTED_FUNCTIONS=["_main", "_play"]']).communicate()
      self.run_browser('page.html', '', '/report_result?1')

    def test_sdl_gl_read(self):
      # SDL, OpenGL, readPixels
      open(os.path.join(self.get_dir(), 'sdl_gl_read.c'), 'w').write(self.with_report_result(open(path_from_root('tests', 'sdl_gl_read.c')).read()))
      Popen([PYTHON, EMCC, os.path.join(self.get_dir(), 'sdl_gl_read.c'), '-o', 'something.html']).communicate()
      self.run_browser('something.html', '.', '/report_result?1')

    def test_sdl_ogl(self):
      # SDL, OpenGL, textures, immediate mode. Closure for more coverage
      shutil.copyfile(path_from_root('tests', 'screenshot.png'), os.path.join(self.get_dir(), 'screenshot.png'))
      self.reftest(path_from_root('tests', 'screenshot-gray-purple.png'))
      Popen([PYTHON, EMCC, path_from_root('tests', 'sdl_ogl.c'), '-O2', '--minify', '0', '-o', 'something.html', '--pre-js', 'reftest.js', '--preload-file', 'screenshot.png', '-s', 'GL_TESTING=1']).communicate()
      self.run_browser('something.html', 'You should see an image with gray at the top.', '/report_result?0')

    def test_sdl_ogl_defaultmatrixmode(self):
      # SDL, OpenGL, textures, immediate mode. Closure for more coverage
      shutil.copyfile(path_from_root('tests', 'screenshot.png'), os.path.join(self.get_dir(), 'screenshot.png'))
      self.reftest(path_from_root('tests', 'screenshot-gray-purple.png'))
      Popen([PYTHON, EMCC, path_from_root('tests', 'sdl_ogl_defaultMatrixMode.c'), '--minify', '0', '-o', 'something.html', '--pre-js', 'reftest.js', '--preload-file', 'screenshot.png', '-s', 'GL_TESTING=1']).communicate()
      self.run_browser('something.html', 'You should see an image with gray at the top.', '/report_result?0')

    def test_sdl_ogl_p(self):
      # Immediate mode with pointers
      shutil.copyfile(path_from_root('tests', 'screenshot.png'), os.path.join(self.get_dir(), 'screenshot.png'))
      self.reftest(path_from_root('tests', 'screenshot-gray.png'))
      Popen([PYTHON, EMCC, path_from_root('tests', 'sdl_ogl_p.c'), '-o', 'something.html', '--pre-js', 'reftest.js', '--preload-file', 'screenshot.png', '-s', 'GL_TESTING=1']).communicate()
      self.run_browser('something.html', 'You should see an image with gray at the top.', '/report_result?0')

    def test_sdl_fog_simple(self):
      # SDL, OpenGL, textures, fog, immediate mode. Closure for more coverage
      shutil.copyfile(path_from_root('tests', 'screenshot.png'), os.path.join(self.get_dir(), 'screenshot.png'))
      self.reftest(path_from_root('tests', 'screenshot-fog-simple.png'))
      Popen([PYTHON, EMCC, path_from_root('tests', 'sdl_fog_simple.c'), '-O2', '--minify', '0', '-o', 'something.html', '--pre-js', 'reftest.js', '--preload-file', 'screenshot.png', '-s', 'GL_TESTING=1']).communicate()
      self.run_browser('something.html', 'You should see an image with fog.', '/report_result?0')

    def test_sdl_fog_negative(self):
      # SDL, OpenGL, textures, fog, immediate mode. Closure for more coverage
      shutil.copyfile(path_from_root('tests', 'screenshot.png'), os.path.join(self.get_dir(), 'screenshot.png'))
      self.reftest(path_from_root('tests', 'screenshot-fog-negative.png'))
      Popen([PYTHON, EMCC, path_from_root('tests', 'sdl_fog_negative.c'), '-o', 'something.html', '--pre-js', 'reftest.js', '--preload-file', 'screenshot.png', '-s', 'GL_TESTING=1']).communicate()
      self.run_browser('something.html', 'You should see an image with fog.', '/report_result?0')

    def test_sdl_fog_density(self):
      # SDL, OpenGL, textures, fog, immediate mode. Closure for more coverage
      shutil.copyfile(path_from_root('tests', 'screenshot.png'), os.path.join(self.get_dir(), 'screenshot.png'))
      self.reftest(path_from_root('tests', 'screenshot-fog-density.png'))
      Popen([PYTHON, EMCC, path_from_root('tests', 'sdl_fog_density.c'), '-o', 'something.html', '--pre-js', 'reftest.js', '--preload-file', 'screenshot.png', '-s', 'GL_TESTING=1']).communicate()
      self.run_browser('something.html', 'You should see an image with fog.', '/report_result?0')

    def test_sdl_fog_exp2(self):
      # SDL, OpenGL, textures, fog, immediate mode. Closure for more coverage
      shutil.copyfile(path_from_root('tests', 'screenshot.png'), os.path.join(self.get_dir(), 'screenshot.png'))
      self.reftest(path_from_root('tests', 'screenshot-fog-exp2.png'))
      Popen([PYTHON, EMCC, path_from_root('tests', 'sdl_fog_exp2.c'), '-o', 'something.html', '--pre-js', 'reftest.js', '--preload-file', 'screenshot.png', '-s', 'GL_TESTING=1']).communicate()
      self.run_browser('something.html', 'You should see an image with fog.', '/report_result?0')

    def test_sdl_fog_linear(self):
      # SDL, OpenGL, textures, fog, immediate mode. Closure for more coverage
      shutil.copyfile(path_from_root('tests', 'screenshot.png'), os.path.join(self.get_dir(), 'screenshot.png'))
      self.reftest(path_from_root('tests', 'screenshot-fog-linear.png'))
      Popen([PYTHON, EMCC, path_from_root('tests', 'sdl_fog_linear.c'), '-o', 'something.html', '--pre-js', 'reftest.js', '--preload-file', 'screenshot.png', '-s', 'GL_TESTING=1']).communicate()
      self.run_browser('something.html', 'You should see an image with fog.', '/report_result?0')

    def test_openal_playback(self):
      shutil.copyfile(path_from_root('tests', 'sounds', 'audio.wav'), os.path.join(self.get_dir(), 'audio.wav'))
      open(os.path.join(self.get_dir(), 'openal_playback.cpp'), 'w').write(self.with_report_result(open(path_from_root('tests', 'openal_playback.cpp')).read()))

      Popen([PYTHON, EMCC, '-O2', os.path.join(self.get_dir(), 'openal_playback.cpp'), '--preload-file', 'audio.wav', '-o', 'page.html']).communicate()
      self.run_browser('page.html', '', '/report_result?1')

    def test_worker(self):
      # Test running in a web worker
      output = Popen([PYTHON, EMCC, path_from_root('tests', 'hello_world_worker.cpp'), '-o', 'worker.js'], stdout=PIPE, stderr=PIPE).communicate()
      assert len(output[0]) == 0, output[0]
      assert os.path.exists('worker.js'), output
      self.assertContained('you should not see this text when in a worker!', run_js('worker.js')) # code should run standalone
      html_file = open('main.html', 'w')
      html_file.write('''
        <html>
        <body>
          Worker Test
          <script>
            var worker = new Worker('worker.js');
            worker.onmessage = function(event) {
              var xhr = new XMLHttpRequest();
              xhr.open('GET', 'http://localhost:8888/report_result?' + event.data);
              xhr.send();
              setTimeout(function() { window.close() }, 1000);
            };
          </script>
        </body>
        </html>
      ''')
      html_file.close()
      self.run_browser('main.html', 'You should see that the worker was called, and said "hello from worker!"', '/report_result?hello%20from%20worker!')

    def test_chunked_synchronous_xhr(self):
      main = 'chunked_sync_xhr.html'
      worker_filename = "download_and_checksum_worker.js"

      html_file = open(main, 'w')
      html_file.write(r"""
        <!doctype html>
        <html>
        <head><meta charset="utf-8"><title>Chunked XHR</title></head>
        <html>
        <body>
          Chunked XHR Web Worker Test
          <script>
            var worker = new Worker(""" + json.dumps(worker_filename) + r""");
            var buffer = [];
            worker.onmessage = function(event) {
              if (event.data.channel === "stdout") {
                var xhr = new XMLHttpRequest();
                xhr.open('GET', 'http://localhost:8888/report_result?' + event.data.line);
                xhr.send();
                setTimeout(function() { window.close() }, 1000);
              } else {
                if (event.data.trace) event.data.trace.split("\n").map(function(v) { console.error(v); });
                if (event.data.line) {
                  console.error(event.data.line);
                } else {
                  var v = event.data.char;
                  if (v == 10) {
                    var line = buffer.splice(0);
                    console.error(line = line.map(function(charCode){return String.fromCharCode(charCode);}).join(''));
                  } else {
                    buffer.push(v);
                  }
                }
              }
            };
          </script>
        </body>
        </html>
      """)
      html_file.close()

      c_source_filename = "checksummer.c"

      prejs_filename = "worker_prejs.js"
      prejs_file = open(prejs_filename, 'w')
      prejs_file.write(r"""
        if (typeof(Module) === "undefined") Module = {};
        Module["arguments"] = ["/bigfile"];
        Module["preInit"] = function() {
            FS.createLazyFile('/', "bigfile", "http://localhost:11111/bogus_file_path", true, false);
        };
        var doTrace = true;
        Module["print"] =    function(s) { self.postMessage({channel: "stdout", line: s}); };
        Module["stderr"] =   function(s) { self.postMessage({channel: "stderr", char: s, trace: ((doTrace && s === 10) ? new Error().stack : null)}); doTrace = false; };
      """)
      prejs_file.close()
      # vs. os.path.join(self.get_dir(), filename)
      # vs. path_from_root('tests', 'hello_world_gles.c')
      Popen([PYTHON, EMCC, path_from_root('tests', c_source_filename), '-g', '-s', 'SMALL_CHUNKS=1', '-o', worker_filename,
                                           '--pre-js', prejs_filename]).communicate()

      chunkSize = 1024
      data = os.urandom(10*chunkSize+1) # 10 full chunks and one 1 byte chunk
      expectedConns = 11
      import zlib
      checksum = zlib.adler32(data)

      def chunked_server(support_byte_ranges):
        class ChunkedServerHandler(BaseHTTPServer.BaseHTTPRequestHandler):
          def sendheaders(s, extra=[], length=len(data)):
            s.send_response(200)
            s.send_header("Content-Length", str(length))
            s.send_header("Access-Control-Allow-Origin", "http://localhost:8888")
            s.send_header("Access-Control-Expose-Headers", "Content-Length, Accept-Ranges")
            s.send_header("Content-type", "application/octet-stream")
            if support_byte_ranges:
              s.send_header("Accept-Ranges", "bytes")
            for i in extra:
              s.send_header(i[0], i[1])
            s.end_headers()

          def do_HEAD(s):
            s.sendheaders()

          def do_OPTIONS(s):
            s.sendheaders([("Access-Control-Allow-Headers", "Range")], 0)

          def do_GET(s):
            if not support_byte_ranges:
              s.sendheaders()
              s.wfile.write(data)
            else:
              (start, end) = s.headers.get("range").split("=")[1].split("-")
              start = int(start)
              end = int(end)
              end = min(len(data)-1, end)
              length = end-start+1
              s.sendheaders([],length)
              s.wfile.write(data[start:end+1])
            s.wfile.close()
        httpd = BaseHTTPServer.HTTPServer(('localhost', 11111), ChunkedServerHandler)
        for i in range(expectedConns+1):
          httpd.handle_request()

      server = multiprocessing.Process(target=chunked_server, args=(True,))
      server.start()
      self.run_browser(main, 'Chunked binary synchronous XHR in Web Workers!', '/report_result?' + str(checksum))
      server.terminate()

    def test_glgears(self):
      self.reftest(path_from_root('tests', 'gears.png'))
      Popen([PYTHON, EMCC, path_from_root('tests', 'hello_world_gles.c'), '-o', 'something.html',
                                           '-DHAVE_BUILTIN_SINCOS', '--pre-js', 'reftest.js', '-s', 'GL_TESTING=1']).communicate()
      self.run_browser('something.html', 'You should see animating gears.', '/report_result?0')

    def test_glgears_animation(self):
      es2_suffix = ['', '_full', '_full_944']
      for full_es2 in [0, 1, 2]:
        for emulation in [0, 1]:
          if full_es2 and emulation: continue
          print full_es2, emulation
          Popen([PYTHON, EMCC, path_from_root('tests', 'hello_world_gles%s.c' % es2_suffix[full_es2]), '-o', 'something.html',
                                               '-DHAVE_BUILTIN_SINCOS', '-s', 'GL_TESTING=1',
                                               '--shell-file', path_from_root('tests', 'hello_world_gles_shell.html')] +
                (['-s', 'FORCE_GL_EMULATION=1'] if emulation else []) +
                (['-s', 'FULL_ES2=1'] if full_es2 else []),
                ).communicate()
          self.run_browser('something.html', 'You should see animating gears.', '/report_gl_result?true')
          assert ('var GLEmulation' in open(self.in_dir('something.html')).read()) == emulation, "emulation code should be added when asked for"

    def test_glgears_bad(self):
      # Make sure that OpenGL ES is not available if typed arrays are not used
      Popen([PYTHON, EMCC, path_from_root('tests', 'hello_world_gles.c'), '-o', 'something.html',
                                           '-DHAVE_BUILTIN_SINCOS', '-s', 'GL_TESTING=1',
                                           '-s', 'USE_TYPED_ARRAYS=0',
                                           '--shell-file', path_from_root('tests', 'hello_world_gles_shell.html')]).communicate()
      self.run_browser('something.html', 'You should not see animating gears.', '/report_gl_result?false')

    def test_glgears_deriv(self):
      self.reftest(path_from_root('tests', 'gears.png'))
      Popen([PYTHON, EMCC, path_from_root('tests', 'hello_world_gles_deriv.c'), '-o', 'something.html', '-s', 'GL_TESTING=1',
                                           '-DHAVE_BUILTIN_SINCOS', '--pre-js', 'reftest.js']).communicate()
      self.run_browser('something.html', 'You should see animating gears.', '/report_result?0')
      src = open('something.html').read()
      assert 'gl-matrix' not in src, 'Should not include glMatrix when not needed'

    def test_glbook(self):
      programs = self.get_library('glbook', [
        os.path.join('Chapter_2', 'Hello_Triangle', 'CH02_HelloTriangle.bc'),
        os.path.join('Chapter_8', 'Simple_VertexShader', 'CH08_SimpleVertexShader.bc'),
        os.path.join('Chapter_9', 'Simple_Texture2D', 'CH09_SimpleTexture2D.bc'),
        os.path.join('Chapter_9', 'Simple_TextureCubemap', 'CH09_TextureCubemap.bc'),
        os.path.join('Chapter_9', 'TextureWrap', 'CH09_TextureWrap.bc'),
        os.path.join('Chapter_10', 'MultiTexture', 'CH10_MultiTexture.bc'),
        os.path.join('Chapter_13', 'ParticleSystem', 'CH13_ParticleSystem.bc'),
      ], configure=None)
      def book_path(*pathelems):
        return path_from_root('tests', 'glbook', *pathelems)
      for program in programs:
        print program
        basename = os.path.basename(program)
        args = []
        if basename == 'CH10_MultiTexture.bc':
          shutil.copyfile(book_path('Chapter_10', 'MultiTexture', 'basemap.tga'), os.path.join(self.get_dir(), 'basemap.tga'))
          shutil.copyfile(book_path('Chapter_10', 'MultiTexture', 'lightmap.tga'), os.path.join(self.get_dir(), 'lightmap.tga'))
          args = ['--preload-file', 'basemap.tga', '--preload-file', 'lightmap.tga']
        elif basename == 'CH13_ParticleSystem.bc':
          shutil.copyfile(book_path('Chapter_13', 'ParticleSystem', 'smoke.tga'), os.path.join(self.get_dir(), 'smoke.tga'))
          args = ['--preload-file', 'smoke.tga', '-O2'] # test optimizations and closure here as well for more coverage

        self.reftest(book_path(basename.replace('.bc', '.png')))
        Popen([PYTHON, EMCC, program, '-o', 'program.html', '--pre-js', 'reftest.js', '-s', 'GL_TESTING=1'] + args).communicate()
        self.run_browser('program.html', '', '/report_result?0')

    def btest(self, filename, expected=None, reference=None, reference_slack=0, args=[]): # TODO: use in all other tests
      if not reference:
        if '\n' in filename: # if we are provided the source and not a path, use that
          src = filename
          filename = 'main.cpp'
        else:
          src = open(path_from_root('tests', filename)).read()
        open(os.path.join(self.get_dir(), filename), 'w').write(self.with_report_result(src))
      else:
        expected = [str(i) for i in range(0, reference_slack+1)]
        shutil.copyfile(path_from_root('tests', filename), os.path.join(self.get_dir(), os.path.basename(filename)))
        self.reftest(path_from_root('tests', reference))
        args = args + ['--pre-js', 'reftest.js', '-s', 'GL_TESTING=1']
      Popen([PYTHON, EMCC, os.path.join(self.get_dir(), os.path.basename(filename)), '-o', 'test.html'] + args).communicate()
      if type(expected) is str: expected = [expected]
      self.run_browser('test.html', '.', ['/report_result?' + e for e in expected])

    def test_gles2_emulation(self):
      shutil.copyfile(path_from_root('tests', 'glbook', 'Chapter_10', 'MultiTexture', 'basemap.tga'), self.in_dir('basemap.tga'))
      shutil.copyfile(path_from_root('tests', 'glbook', 'Chapter_10', 'MultiTexture', 'lightmap.tga'), self.in_dir('lightmap.tga'))
      shutil.copyfile(path_from_root('tests', 'glbook', 'Chapter_13', 'ParticleSystem', 'smoke.tga'), self.in_dir('smoke.tga'))

      for source, reference in [
        (os.path.join('glbook', 'Chapter_2', 'Hello_Triangle', 'Hello_Triangle_orig.c'), path_from_root('tests', 'glbook', 'CH02_HelloTriangle.png')),
        #(os.path.join('glbook', 'Chapter_8', 'Simple_VertexShader', 'Simple_VertexShader_orig.c'), path_from_root('tests', 'glbook', 'CH08_SimpleVertexShader.png')), # XXX needs INT extension in WebGL
        (os.path.join('glbook', 'Chapter_9', 'TextureWrap', 'TextureWrap_orig.c'), path_from_root('tests', 'glbook', 'CH09_TextureWrap.png')),
        #(os.path.join('glbook', 'Chapter_9', 'Simple_TextureCubemap', 'Simple_TextureCubemap_orig.c'), path_from_root('tests', 'glbook', 'CH09_TextureCubemap.png')), # XXX needs INT extension in WebGL
        (os.path.join('glbook', 'Chapter_9', 'Simple_Texture2D', 'Simple_Texture2D_orig.c'), path_from_root('tests', 'glbook', 'CH09_SimpleTexture2D.png')),
        (os.path.join('glbook', 'Chapter_10', 'MultiTexture', 'MultiTexture_orig.c'), path_from_root('tests', 'glbook', 'CH10_MultiTexture.png')),
        (os.path.join('glbook', 'Chapter_13', 'ParticleSystem', 'ParticleSystem_orig.c'), path_from_root('tests', 'glbook', 'CH13_ParticleSystem.png')),
      ]:
        print source
        self.btest(source,
                   reference=reference,
                   args=['-I' + path_from_root('tests', 'glbook', 'Common'),
                         path_from_root('tests', 'glbook', 'Common', 'esUtil.c'),
                         path_from_root('tests', 'glbook', 'Common', 'esShader.c'),
                         path_from_root('tests', 'glbook', 'Common', 'esShapes.c'),
                         path_from_root('tests', 'glbook', 'Common', 'esTransform.c'),
                         '-s', 'FULL_ES2=1',
                         '--preload-file', 'basemap.tga', '--preload-file', 'lightmap.tga', '--preload-file', 'smoke.tga'])

    def test_emscripten_api(self):
      self.btest('emscripten_api_browser.cpp', '1', args=['-s', '''EXPORTED_FUNCTIONS=['_main', '_third']'''])

    def test_emscripten_api_infloop(self):
      self.btest('emscripten_api_browser_infloop.cpp', '7')

    def test_emscripten_fs_api(self):
      shutil.copyfile(path_from_root('tests', 'screenshot.png'), os.path.join(self.get_dir(), 'screenshot.png')) # preloaded *after* run
      self.btest('emscripten_fs_api_browser.cpp', '1')

    def test_sdl_quit(self):
      self.btest('sdl_quit.c', '1')

    def test_sdl_resize(self):
      self.btest('sdl_resize.c', '1')

    def test_gc(self):
      self.btest('browser_gc.cpp', '1')

    def test_glshaderinfo(self):
      self.btest('glshaderinfo.cpp', '1')

    def test_sdlglshader(self):
      self.btest('sdlglshader.c', reference='sdlglshader.png', args=['--closure', '1'])

    def test_gl_ps(self):
      # pointers and a shader
      shutil.copyfile(path_from_root('tests', 'screenshot.png'), os.path.join(self.get_dir(), 'screenshot.png'))
      self.btest('gl_ps.c', reference='gl_ps.png', args=['--preload-file', 'screenshot.png'])

    def test_gl_ps_packed(self):
      # packed data that needs to be strided
      shutil.copyfile(path_from_root('tests', 'screenshot.png'), os.path.join(self.get_dir(), 'screenshot.png'))
      self.btest('gl_ps_packed.c', reference='gl_ps.png', args=['--preload-file', 'screenshot.png'])

    def test_gl_ps_workaround(self):
      shutil.copyfile(path_from_root('tests', 'screenshot.png'), os.path.join(self.get_dir(), 'screenshot.png'))
      self.btest('gl_ps_workaround.c', reference='gl_ps.png', args=['--preload-file', 'screenshot.png'])

    def test_gl_ps_workaround2(self):
      shutil.copyfile(path_from_root('tests', 'screenshot.png'), os.path.join(self.get_dir(), 'screenshot.png'))
      self.btest('gl_ps_workaround2.c', reference='gl_ps.png', args=['--preload-file', 'screenshot.png'])

    def test_gl_ps_strides(self):
      shutil.copyfile(path_from_root('tests', 'screenshot.png'), os.path.join(self.get_dir(), 'screenshot.png'))
      self.btest('gl_ps_strides.c', reference='gl_ps_strides.png', args=['--preload-file', 'screenshot.png'])

    def test_matrix_identity(self):
      self.btest('gl_matrix_identity.c', expected=['-1882984448', '460451840'])

    def test_cubegeom_pre(self):
      self.btest('cubegeom_pre.c', expected=['-1472804742', '-1626058463', '-2046234971'])

    def test_cubegeom_pre2(self):
      self.btest('cubegeom_pre2.c', expected=['-1472804742', '-1626058463', '-2046234971'], args=['-s', 'GL_DEBUG=1']) # some coverage for GL_DEBUG not breaking the build

    def test_cubegeom_pre3(self):
      self.btest('cubegeom_pre3.c', expected=['-1472804742', '-1626058463', '-2046234971'])

    def test_cubegeom(self):
      self.btest('cubegeom.c', expected=['188641320', '1522377227', '-1054007155', '-1111866053'])

    def test_cubegeom_color(self):
      self.btest('cubegeom_color.c', expected=['588472350', '-687660609', '-818120875'])

    def test_cubegeom_normal(self):
      self.btest('cubegeom_normal.c', expected=['752917084', '-251570256', '-291655550'])

    def test_cubegeom_normal_dap(self): # draw is given a direct pointer to clientside memory, no element array buffer
      self.btest('cubegeom_normal_dap.c', expected=['752917084', '-251570256', '-291655550'])

    def test_cubegeom_normal_dap_far(self): # indices do nto start from 0
      self.btest('cubegeom_normal_dap_far.c', expected=['752917084', '-251570256', '-291655550'])

    def test_cubegeom_normal_dap_far_range(self): # glDrawRangeElements
      self.btest('cubegeom_normal_dap_far_range.c', expected=['752917084', '-251570256', '-291655550'])

    def test_cubegeom_normal_dap_far_glda(self): # use glDrawArrays
      self.btest('cubegeom_normal_dap_far_glda.c', expected=['-218745386', '-263951846', '-375182658'])

    def test_cubegeom_normal_dap_far_glda_quad(self): # with quad
      self.btest('cubegeom_normal_dap_far_glda_quad.c', expected=['1757386625', '-677777235', '-690699597'])

    def test_cubegeom_mt(self):
      self.btest('cubegeom_mt.c', expected=['-457159152', '910983047', '870576921']) # multitexture

    def test_cubegeom_color2(self):
      self.btest('cubegeom_color2.c', expected=['1121999515', '-391668088', '-522128354'])

    def test_cubegeom_texturematrix(self):
      self.btest('cubegeom_texturematrix.c', expected=['1297500583', '-791216738', '-783804685'])

    def test_cubegeom_fog(self):
      self.btest('cubegeom_fog.c', expected=['1617140399', '-898782526', '-946179526'])

    def test_cubegeom_pre_vao(self):
      self.btest('cubegeom_pre_vao.c', expected=['-1472804742', '-1626058463', '-2046234971'])

    def test_cubegeom_pre2_vao(self):
      self.btest('cubegeom_pre2_vao.c', expected=['-1472804742', '-1626058463', '-2046234971'])

    def test_cubegeom_pre2_vao2(self):
      self.btest('cubegeom_pre2_vao2.c', expected=['-790445118'])

    def test_cube_explosion(self):
      self.btest('cube_explosion.c', expected=['667220544', '-1543354600', '-1485258415'])

    def test_sdl_canvas_palette(self):
      self.btest('sdl_canvas_palette.c', reference='sdl_canvas_palette.png')

    def test_sdl_canvas_twice(self):
      self.btest('sdl_canvas_twice.c', reference='sdl_canvas_twice.png')

    def test_sdl_maprgba(self):
      self.btest('sdl_maprgba.c', reference='sdl_maprgba.png', reference_slack=3)

    def test_sdl_rotozoom(self):
      shutil.copyfile(path_from_root('tests', 'screenshot.png'), os.path.join(self.get_dir(), 'example.png'))
      self.btest('sdl_rotozoom.c', reference='sdl_rotozoom.png', args=['--preload-file', 'example.png'])

    def test_sdl_canvas_palette_2(self):
      open(os.path.join(self.get_dir(), 'pre.js'), 'w').write('''
        Module['preRun'].push(function() { 
          SDL.defaults.copyOnLock = false;
        });
      ''')

      open(os.path.join(self.get_dir(), 'args-r.js'), 'w').write('''
        Module['arguments'] = ['-r'];
      ''')

      open(os.path.join(self.get_dir(), 'args-g.js'), 'w').write('''
        Module['arguments'] = ['-g'];
      ''')

      open(os.path.join(self.get_dir(), 'args-b.js'), 'w').write('''
        Module['arguments'] = ['-b'];
      ''')
        
      self.btest('sdl_canvas_palette_2.c', reference='sdl_canvas_palette_r.png', args=['--pre-js', 'pre.js', '--pre-js', 'args-r.js'])
      self.btest('sdl_canvas_palette_2.c', reference='sdl_canvas_palette_g.png', args=['--pre-js', 'pre.js', '--pre-js', 'args-g.js'])
      self.btest('sdl_canvas_palette_2.c', reference='sdl_canvas_palette_b.png', args=['--pre-js', 'pre.js', '--pre-js', 'args-b.js'])

    def test_glbegin_points(self):
      shutil.copyfile(path_from_root('tests', 'screenshot.png'), os.path.join(self.get_dir(), 'screenshot.png'))
      self.btest('glbegin_points.c', reference='glbegin_points.png', args=['--preload-file', 'screenshot.png'])

    def test_s3tc(self):
      shutil.copyfile(path_from_root('tests', 'screenshot.dds'), os.path.join(self.get_dir(), 'screenshot.dds'))
      self.btest('s3tc.c', reference='s3tc.png', args=['--preload-file', 'screenshot.dds'])

    def test_s3tc_crunch(self):
      shutil.copyfile(path_from_root('tests', 'ship.dds'), 'ship.dds')
      shutil.copyfile(path_from_root('tests', 'bloom.dds'), 'bloom.dds')
      shutil.copyfile(path_from_root('tests', 'water.dds'), 'water.dds')
      Popen([PYTHON, FILE_PACKAGER, 'test.data', '--pre-run', '--crunch', '--preload', 'ship.dds', 'bloom.dds', 'water.dds'], stdout=open('pre.js', 'w')).communicate()
      assert os.stat('test.data').st_size < 0.5*(os.stat('ship.dds').st_size+os.stat('bloom.dds').st_size+os.stat('water.dds').st_size), 'Compressed should be smaller than dds'
      shutil.move('ship.dds', 'ship.donotfindme.dds') # make sure we load from the compressed
      shutil.move('bloom.dds', 'bloom.donotfindme.dds') # make sure we load from the compressed
      shutil.move('water.dds', 'water.donotfindme.dds') # make sure we load from the compressed
      self.btest('s3tc_crunch.c', reference='s3tc_crunch.png', reference_slack=11, args=['--pre-js', 'pre.js'])

    def test_s3tc_crunch_split(self): # load several datafiles/outputs of file packager
      shutil.copyfile(path_from_root('tests', 'ship.dds'), 'ship.dds')
      shutil.copyfile(path_from_root('tests', 'bloom.dds'), 'bloom.dds')
      shutil.copyfile(path_from_root('tests', 'water.dds'), 'water.dds')
      Popen([PYTHON, FILE_PACKAGER, 'asset_a.data', '--pre-run', '--crunch', '--preload', 'ship.dds', 'bloom.dds'], stdout=open('asset_a.js', 'w')).communicate()
      Popen([PYTHON, FILE_PACKAGER, 'asset_b.data', '--pre-run', '--crunch', '--preload', 'water.dds'], stdout=open('asset_b.js', 'w')).communicate()
      shutil.move('ship.dds', 'ship.donotfindme.dds') # make sure we load from the compressed
      shutil.move('bloom.dds', 'bloom.donotfindme.dds') # make sure we load from the compressed
      shutil.move('water.dds', 'water.donotfindme.dds') # make sure we load from the compressed
      self.btest('s3tc_crunch.c', reference='s3tc_crunch.png', reference_slack=11, args=['--pre-js', 'asset_a.js', '--pre-js', 'asset_b.js'])

    def test_aniso(self):
      shutil.copyfile(path_from_root('tests', 'water.dds'), 'water.dds')
      self.btest('aniso.c', reference='aniso.png', reference_slack=2, args=['--preload-file', 'water.dds'])

    def test_tex_nonbyte(self):
      self.btest('tex_nonbyte.c', reference='tex_nonbyte.png')

    def test_float_tex(self):
      self.btest('float_tex.cpp', reference='float_tex.png')

    def test_subdata(self):
      self.btest('gl_subdata.cpp', reference='float_tex.png')

    def test_perspective(self):
      self.btest('perspective.c', reference='perspective.png')

    def test_runtimelink(self):
      main, supp = self.setup_runtimelink_test()

      open(self.in_dir('supp.cpp'), 'w').write(supp)
      Popen([PYTHON, EMCC, self.in_dir('supp.cpp'), '-o', 'supp.js', '-s', 'LINKABLE=1', '-s', 'NAMED_GLOBALS=1', '-s', 'BUILD_AS_SHARED_LIB=2', '-O2']).communicate()
      shutil.move(self.in_dir('supp.js'), self.in_dir('supp.so'))

      self.btest(main, args=['-s', 'LINKABLE=1', '-s', 'NAMED_GLOBALS=1', '-s', 'RUNTIME_LINKED_LIBS=["supp.so"]', '-DBROWSER=1', '-O2'], expected='76')

    def test_pre_run_deps(self):
      # Adding a dependency in preRun will delay run
      open(os.path.join(self.get_dir(), 'pre.js'), 'w').write('''
        Module.preRun = function() {
          addRunDependency();
          Module.print('preRun called, added a dependency...');
          setTimeout(function() {
            Module.okk = 10;
            removeRunDependency()
          }, 2000);
        };
      ''')
      self.btest('pre_run_deps.cpp', expected='10', args=['--pre-js', 'pre.js'])

    def test_worker_api(self):
      Popen([PYTHON, EMCC, path_from_root('tests', 'worker_api_worker.cpp'), '-o', 'worker.js', '-s', 'BUILD_AS_WORKER=1', '-s', 'EXPORTED_FUNCTIONS=["_one"]']).communicate()
      self.btest('worker_api_main.cpp', expected='566')

    def test_worker_api_2(self):
      Popen([PYTHON, EMCC, path_from_root('tests', 'worker_api_2_worker.cpp'), '-o', 'worker.js', '-s', 'BUILD_AS_WORKER=1', '-O2', '--minify', '0', '-s', 'EXPORTED_FUNCTIONS=["_one", "_two", "_three", "_four"]']).communicate()
      self.btest('worker_api_2_main.cpp', args=['-O2', '--minify', '0'], expected='11')

    def test_emscripten_async_wget2(self):
      self.btest('http.cpp', expected='0', args=['-I' + path_from_root('tests')])

    pids_to_clean = []
    def clean_pids(self):
      import signal, errno
      def pid_exists(pid):
        try:
            # NOTE: may just kill the process in Windows
            os.kill(pid, 0)
        except OSError, e:
            return e.errno == errno.EPERM
        else:
            return True
      def kill_pids(pids, sig):
        for pid in pids:
          if not pid_exists(pid):
            break
          print '[killing %d]' % pid
          try:
            os.kill(pid, sig)
            print '[kill succeeded]'
          except:
            print '[kill fail]'
      # ask nicely (to try and catch the children)
      kill_pids(browser.pids_to_clean, signal.SIGTERM)
      time.sleep(1)
      # extreme prejudice, may leave children
      kill_pids(browser.pids_to_clean, signal.SIGKILL)
      browser.pids_to_clean = []

    # Runs a websocket server at a specific port. port is the true tcp socket we forward to, port+1 is the websocket one
    class WebsockHarness:
      def __init__(self, port, server_func=None, no_server=False):
        self.port = port
        self.server_func = server_func
        self.no_server = no_server

      def __enter__(self):
        import socket, websockify
        if not self.no_server:
          def server_func(q):
            q.put(None) # No sub-process to start
            ssock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
            ssock.bind(("127.0.0.1", self.port))
            ssock.listen(2)
            while True:
              csock, addr = ssock.accept()
              print "Connection from %s" % repr(addr)
              csock.send("te\x01\xff\x79st\x02")

          server_func = self.server_func or server_func

          server_queue = multiprocessing.Queue()
          self.server = multiprocessing.Process(target=server_func, args=(server_queue,))
          self.server.start()
          browser.pids_to_clean.append(self.server.pid)
          while True:
            if not server_queue.empty():
              spid = server_queue.get()
              if spid:
                browser.pids_to_clean.append(spid)
              break
            time.sleep(0.1)
          print '[Socket server on processes %s]' % str(browser.pids_to_clean[-2:])

        def websockify_func(wsp): wsp.start_server()

        print >> sys.stderr, 'running websockify on %d, forward to tcp %d' % (self.port+1, self.port)
        wsp = websockify.WebSocketProxy(verbose=True, listen_port=self.port+1, target_host="127.0.0.1", target_port=self.port, run_once=True)
        self.websockify = multiprocessing.Process(target=websockify_func, args=(wsp,))
        self.websockify.start()
        browser.pids_to_clean.append(self.websockify.pid)
        print '[Websockify on processes %s]' % str(browser.pids_to_clean[-2:])

      def __exit__(self, *args, **kwargs):
        if self.websockify.is_alive():
          self.websockify.terminate()
        self.websockify.join()

    # always run these tests last
    # make sure to use different ports in each one because it takes a while for the processes to be cleaned up
    def test_websockets(self):
      try:
        with self.WebsockHarness(8990):
          self.btest('websockets.c', expected='571')
      finally:
        self.clean_pids()

    def test_websockets_partial(self):
      def partial(q):
        import socket

        q.put(None) # No sub-process to start
        ssock = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
        ssock.bind(("127.0.0.1", 8990))
        ssock.listen(2)
        while True:
          csock, addr = ssock.accept()
          print "Connection from %s" % repr(addr)
          csock.send("\x09\x01\x02\x03\x04\x05\x06\x07\x08\x09")
          csock.send("\x08\x01\x02\x03\x04\x05\x06\x07\x08")
          csock.send("\x07\x01\x02\x03\x04\x05\x06\x07")
          csock.send("\x06\x01\x02\x03\x04\x05\x06")
          csock.send("\x05\x01\x02\x03\x04\x05")
          csock.send("\x04\x01\x02\x03\x04")
          csock.send("\x03\x01\x02\x03")
          csock.send("\x02\x01\x02")
          csock.send("\x01\x01")

      try:
        with self.WebsockHarness(8990, partial):
          self.btest('websockets_partial.c', expected='165')
      finally:
        self.clean_pids()

    def make_relay_server(self, port1, port2):
      def relay_server(q):
        print >> sys.stderr, 'creating relay server on ports %d,%d' % (port1, port2)
        proc = Popen([PYTHON, path_from_root('tests', 'socket_relay.py'), str(port1), str(port2)])
        q.put(proc.pid)
        proc.communicate()
      return relay_server

    def test_websockets_bi(self):
      for datagram in [0,1]:
        try:
          with self.WebsockHarness(8992, self.make_relay_server(8992, 8994)):
            with self.WebsockHarness(8994, no_server=True):
              Popen([PYTHON, EMCC, path_from_root('tests', 'websockets_bi_side.c'), '-o', 'side.html', '-DSOCKK=8995', '-DTEST_DGRAM=%d' % datagram]).communicate()
              self.btest('websockets_bi.c', expected='2499', args=['-DTEST_DGRAM=%d' % datagram])
        finally:
          self.clean_pids()

    def test_websockets_bi_listen(self):
      try:
        with self.WebsockHarness(6992, self.make_relay_server(6992, 6994)):
          with self.WebsockHarness(6994, no_server=True):
            Popen([PYTHON, EMCC, path_from_root('tests', 'websockets_bi_side.c'), '-o', 'side.html', '-DSOCKK=6995']).communicate()
            self.btest('websockets_bi_listener.c', expected='2499')
      finally:
        self.clean_pids()

    def test_websockets_gethostbyname(self):
      try:
        with self.WebsockHarness(7000):
          self.btest('websockets_gethostbyname.c', expected='571', args=['-O2'])
      finally:
        self.clean_pids()

    def test_websockets_bi_bigdata(self):
      try:
        with self.WebsockHarness(3992, self.make_relay_server(3992, 3994)):
          with self.WebsockHarness(3994, no_server=True):
            Popen([PYTHON, EMCC, path_from_root('tests', 'websockets_bi_side_bigdata.c'), '-o', 'side.html', '-DSOCKK=3995', '-s', 'SOCKET_DEBUG=0', '-I' + path_from_root('tests')]).communicate()
            self.btest('websockets_bi_bigdata.c', expected='0', args=['-s', 'SOCKET_DEBUG=0', '-I' + path_from_root('tests')])
      finally:
        self.clean_pids()

    def test_enet(self):
      try_delete(self.in_dir('enet'))
      shutil.copytree(path_from_root('tests', 'enet'), self.in_dir('enet'))
      pwd = os.getcwd()
      os.chdir(self.in_dir('enet'))
      Popen([PYTHON, path_from_root('emconfigure'), './configure']).communicate()
      Popen([PYTHON, path_from_root('emmake'), 'make']).communicate()
      enet = [self.in_dir('enet', '.libs', 'libenet.a'), '-I'+path_from_root('tests', 'enet', 'include')]
      os.chdir(pwd)
      Popen([PYTHON, EMCC, path_from_root('tests', 'enet_server.c'), '-o', 'server.html'] + enet).communicate()

      try:
        with self.WebsockHarness(1234, self.make_relay_server(1234, 1236)):
          with self.WebsockHarness(1236, no_server=True):
            self.btest('enet_client.c', expected='0', args=enet)
      finally:
        self.clean_pids()

elif 'benchmark' in str(sys.argv):
  # Benchmarks. Run them with argument |benchmark|. To run a specific test, do
  # |benchmark.test_X|.

  fingerprint = [time.asctime()]
  try:
    fingerprint.append('em: ' + Popen(['git', 'show'], stdout=PIPE).communicate()[0].split('\n')[0])
  except:
    pass
  try:
    d = os.getcwd()
    os.chdir(os.path.expanduser('~/Dev/mozilla-central'))
    fingerprint.append('sm: ' + filter(lambda line: 'changeset' in line, 
                                       Popen(['hg', 'tip'], stdout=PIPE).communicate()[0].split('\n'))[0])
  except:
    pass
  finally:
    os.chdir(d)
  fingerprint.append('llvm: ' + LLVM_ROOT)
  print 'Running Emscripten benchmarks... [ %s ]' % ' | '.join(fingerprint)

  sys.argv = filter(lambda x: x != 'benchmark', sys.argv)

  assert(os.path.exists(CLOSURE_COMPILER))

  try:
    index = SPIDERMONKEY_ENGINE.index("options('strict')")
    SPIDERMONKEY_ENGINE = SPIDERMONKEY_ENGINE[:index-1] + SPIDERMONKEY_ENGINE[index+1:] # closure generates non-strict
  except:
    pass

  Building.COMPILER = CLANG

  # Pick the JS engine to benchmark. If you specify one, it will be picked. For example, python tests/runner.py benchmark SPIDERMONKEY_ENGINE
  JS_ENGINE = JS_ENGINES[0]
  for i in range(1, len(sys.argv)):
    arg = sys.argv[i]
    if not arg.startswith('benchmark.test_'):
      JS_ENGINE = eval(arg)
      sys.argv[i] = None
  sys.argv = filter(lambda arg: arg is not None, sys.argv)
  print 'Benchmarking JS engine:', ' '.join(JS_ENGINE)

  Building.COMPILER_TEST_OPTS = []

  TEST_REPS = 4
  TOTAL_TESTS = 8

  tests_done = 0
  total_times = map(lambda x: 0., range(TOTAL_TESTS))
  total_native_times = map(lambda x: 0., range(TOTAL_TESTS))

  class benchmark(RunnerCore):
    def print_stats(self, times, native_times, last=False, reps=TEST_REPS):
      mean = sum(times)/len(times)
      squared_times = map(lambda x: x*x, times)
      mean_of_squared = sum(squared_times)/len(times)
      std = math.sqrt(mean_of_squared - mean*mean)
      sorted_times = times[:]
      sorted_times.sort()
      median = sum(sorted_times[len(sorted_times)/2 - 1:len(sorted_times)/2 + 1])/2

      mean_native = sum(native_times)/len(native_times)
      squared_native_times = map(lambda x: x*x, native_times)
      mean_of_squared_native = sum(squared_native_times)/len(native_times)
      std_native = math.sqrt(mean_of_squared_native - mean_native*mean_native)
      sorted_native_times = native_times[:]
      sorted_native_times.sort()
      median_native = sum(sorted_native_times[len(sorted_native_times)/2 - 1:len(sorted_native_times)/2 + 1])/2

      final = mean / mean_native

      if last:
        norm = 0
        for i in range(len(times)):
          norm += times[i]/native_times[i]
        norm /= len(times)
        print
        print '  JavaScript: %.3f    Native: %.3f   Ratio:  %.3f  Normalized ratio: %.3f' % (mean, mean_native, final, norm)
        return

      print
      print '   JavaScript: mean: %.3f (+-%.3f) secs  median: %.3f  range: %.3f-%.3f  (noise: %3.3f%%)  (%d runs)' % (mean, std, median, min(times), max(times), 100*std/mean, reps)
      print '   Native    : mean: %.3f (+-%.3f) secs  median: %.3f  range: %.3f-%.3f  (noise: %3.3f%%)  JS is %.2f X slower' % (mean_native, std_native, median_native, min(native_times), max(native_times), 100*std_native/mean_native, final)

    def do_benchmark(self, name, src, args=[], expected_output='FAIL', emcc_args=[], native_args=[], shared_args=[], force_c=False, reps=TEST_REPS):
      dirname = self.get_dir()
      filename = os.path.join(dirname, name + '.c' + ('' if force_c else 'pp'))
      f = open(filename, 'w')
      f.write(src)
      f.close()
      final_filename = os.path.join(dirname, name + '.js')

      try_delete(final_filename)
      output = Popen([PYTHON, EMCC, filename, #'-O3',
                      '-O2', '-s', 'INLINING_LIMIT=0', '-s', 'DOUBLE_MODE=0', '-s', 'PRECISE_I64_MATH=0',# '-s', 'EXPLICIT_ZEXT=1',
                      '-s', 'ASM_JS=1', '-s', 'USE_MATH_IMUL=1', '--llvm-lto', '1',
                      '-s', 'TOTAL_MEMORY=128*1024*1024', '-s', 'FAST_MEMORY=10*1024*1024',
                      '-o', final_filename] + shared_args + emcc_args, stdout=PIPE, stderr=self.stderr_redirect).communicate()
      assert os.path.exists(final_filename), 'Failed to compile file: ' + output[0]

      if self.save_JS:
        self.hardcode_arguments(final_filename, args)

      # Run JS
      global total_times, tests_done
      times = []
      for i in range(reps):
        start = time.time()
        js_output = run_js(final_filename, engine=JS_ENGINE, args=args, stderr=PIPE, full_output=True)
        if i == 0 and 'Successfully compiled asm.js code' in js_output:
          if 'asm.js link error' not in js_output:
            print "[%s was asm.js'ified]" % name
        curr = time.time()-start
        times.append(curr)
        total_times[tests_done] += curr
        if i == 0:
          # Sanity check on output
          self.assertContained(expected_output, js_output)

      # Run natively
      self.build_native(filename, shared_args + native_args)
      global total_native_times
      native_times = []
      for i in range(reps):
        start = time.time()
        native_output = self.run_native(filename, args)
        if i == 0:
          # Sanity check on output
          self.assertContained(expected_output, native_output)
        curr = time.time()-start
        native_times.append(curr)
        total_native_times[tests_done] += curr

      self.print_stats(times, native_times, reps=reps)

      #tests_done += 1
      #if tests_done == TOTAL_TESTS:
      #  print 'Total stats:',
      #  self.print_stats(total_times, total_native_times, last=True)

    def test_primes(self):
      src = '''
        #include<stdio.h>
        #include<math.h>
        int main() {
          int primes = 0, curri = 2;
          while (primes < 220000) {
            int ok = true;
            for (int j = 2; j < sqrtf(curri); j++) {
              if (curri % j == 0) {
                ok = false;
                break;
              }
            }
            if (ok) {
              primes++;
            }
            curri++;
          }
          printf("lastprime: %d.\\n", curri-1);
          return 0;
        }
      '''
      self.do_benchmark('primes', src, [], 'lastprime: 3043739.')

    def test_memops(self):
      src = '''
        #include<stdio.h>
        #include<string.h>
        #include<stdlib.h>
        int main() {
          int N = 1024*1024;
          int M = 800;
          int final = 0;
          char *buf = (char*)malloc(N);
          for (int t = 0; t < M; t++) {
            for (int i = 0; i < N; i++)
              buf[i] = (i + final)%256;
            for (int i = 0; i < N; i++)
              final += buf[i] & 1;
            final = final % 1000;
          }
          printf("final: %d.\\n", final);
          return 0;
        }      
      '''
      self.do_benchmark('memops', src, [], 'final: 400.')

    def zzztest_files(self):
      src = r'''
        #include<stdio.h>
        #include<stdlib.h>
        #include<assert.h>
        #include <unistd.h>

        int main() {
          int N = 100;
          int M = 1000;
          int K = 1000;
          unsigned char *k = (unsigned char*)malloc(K+1), *k2 = (unsigned char*)malloc(K+1);
          for (int i = 0; i < K; i++) {
            k[i] = (i % 250) + 1;
          }
          k[K] = 0;
          char buf[100];
          for (int i = 0; i < N; i++) {
            sprintf(buf, "/dev/shm/file-%d.dat", i);
            FILE *f = fopen(buf, "w");
            for (int j = 0; j < M; j++) {
              fwrite(k, 1, (j % K) + 1, f);
            }
            fclose(f);
          }
          for (int i = 0; i < N; i++) {
            sprintf(buf, "/dev/shm/file-%d.dat", i);
            FILE *f = fopen(buf, "r");
            for (int j = 0; j < M; j++) {
              fread(k2, 1, (j % K) + 1, f);
            }
            fclose(f);
            for (int j = 0; j < K; j++) {
              assert(k[j] == k2[j]);
            }
            unlink(buf);
          }
          printf("ok");
          return 0;
        }      
      '''
      self.do_benchmark(src, [], 'ok')

    def test_copy(self):
      src = r'''
        #include<stdio.h>
        struct vec {
          int x, y, z;
          int r, g, b;
          vec(int x_, int y_, int z_, int r_, int g_, int b_) : x(x_), y(y_), z(z_), r(r_), g(g_), b(b_) {}
          static vec add(vec a, vec b) {
            return vec(a.x+b.x, a.y+b.y, a.z+b.z, a.r+b.r, a.g+b.g, a.b+b.b);
          }
          void norm() {
            x %= 1024;
            y %= 1024;
            z %= 1024;
            r %= 1024;
            b %= 1024;
            g %= 1024;
          }
          int sum() { return x + y + z + r + g + b; }
        };
        int main() {
          int total = 0;
          for (int i = 0; i < 1250; i++) {
            for (int j = 0; j < 50000; j++) {
              vec c(i, i+i%10, j*2, i%255, j%120, i%15);
              vec d(j+i%10, j*2, j%255, i%120, j%15, j);
              vec e = c;
              c.norm();
              d.norm();
              vec f = vec::add(c, d);
              f = vec::add(e, f);
              f.norm();
              f = vec::add(d, f);
              total += f.sum() % 100;
              total %= 10240;
            }
          }
          printf("sum:%d\n", total);
          return 0;
        }      
      '''
      self.do_benchmark('copy', src, [], 'sum:2836\n', emcc_args=['-s', 'QUANTUM_SIZE=4', '-s', 'USE_TYPED_ARRAYS=2'])

    def test_fannkuch(self):
      src = open(path_from_root('tests', 'fannkuch.cpp'), 'r').read()
      self.do_benchmark('fannkuch', src, ['11'], 'Pfannkuchen(11) = 51.')

    def test_corrections(self):
      src = r'''
        #include<stdio.h>
        #include<math.h>
        int main() {
          int N = 20000;
          int M = 7000;
          unsigned int f = 0;
          unsigned short s = 0;
          for (int t = 0; t < M; t++) {
            for (int i = 0; i < N; i++) {
              f += i / ((t % 5)+1);
              if (f > 1000) f /= (t % 3)+1;
              if (i % 4 == 0) f += i * (i % 8 == 0 ? 1 : -1);
              s += (short(f)*short(f)) % 256;
            }
          }
          printf("final: %d:%d.\n", f, s);
          return 0;
        }      
      '''
      self.do_benchmark('corrections', src, [], 'final: 40006013:10225.', emcc_args=['-s', 'CORRECT_SIGNS=1', '-s', 'CORRECT_OVERFLOWS=1', '-s', 'CORRECT_ROUNDINGS=1'])

    def fasta(self, double_rep):
      src = open(path_from_root('tests', 'fasta.cpp'), 'r').read().replace('double', double_rep)
      self.do_benchmark('fasta', src, ['19000000'], '''GGCCGGGCGCGGTGGCTCACGCCTGTAATCCCAGCACTTTGGGAGGCCGAGGCGGGCGGA\nTCACCTGAGGTCAGGAGTTCGAGACCAGCCTGGCCAACATGGTGAAACCCCGTCTCTACT\nAAAAATACAAAAATTAGCCGGGCGTGGTGGCGCGCGCCTGTAATCCCAGCTACTCGGGAG\nGCTGAGGCAGGAGAATCGCTTGAACCCGGGAGGCGGAGGTTGCAGTGAGCCGAGATCGCG\nCCACTGCACTCCAGCCTGGGCGACAGAGCGAGACTCCGTCTCAAAAAGGCCGGGCGCGGT\nGGCTCACGCCTGTAATCCCAGCACTTTGGGAGGCCGAGGCGGGCGGATCACCTGAGGTCA\nGGAGTTCGAGACCAGCCTGGCCAACATGGTGAAACCCCGTCTCTACTAAAAATACAAAAA\nTTAGCCGGGCGTGGTGGCGCGCGCCTGTAATCCCAGCTACTCGGGAGGCTGAGGCAGGAG\nAATCGCTTGAACCCGGGAGGCGGAGGTTGCAGTGAGCCGAGATCGCGCCACTGCACTCCA\nGCCTGGGCGA''')

    def test_fasta_float(self):
      self.fasta('float')

    def zzztest_fasta_double(self):
      self.fasta('double')

    def test_skinning(self):
      src = open(path_from_root('tests', 'skinning_test_no_simd.cpp'), 'r').read()
      self.do_benchmark('skinning', src, ['9500', '10000'], 'blah=0.000000')

    def test_life(self):
      src = open(path_from_root('tests', 'life.c'), 'r').read()
      self.do_benchmark('life', src, ['32', '32', '15000'], '''--------------------------------
                  []  [][][]    []        []    [][]            
                              []  [][]  []      []      []    []
                                []    [][]    [][]      []      
                                []            []  []      []    
                    []      []  []  []      []      []  []  []  
                    [][][][]      []      [][]      [][]        
                                    []                          
                                                          []    
                                                        []  []  
                        [][]          []                  []    
                        [][]                            [][][]  
                                                          []    
                                                                
                                              []                
                                            []  []              
                                            [][]                
                        []              []  [][]        [][]    
                                          []  []  []    []      
                                          [][]    []            
                                          [][][][]              
                                                                
                                            [][][]    [][]      
                                          [][][]      [][]      
                                            []                  
                                          []                    
                      []                [][][]        []        
                                                []  []          
                                        [][]      []            
                                                [][][]          
                        [][][]                            [][]  
                      [][][][][]      []                  [][]  
                      []      [][]  []  []                      
--------------------------------
''', shared_args=['-std=c99'], force_c=True)

    def test_zlib(self):
      src = open(path_from_root('tests', 'zlib', 'benchmark.c'), 'r').read()
      emcc_args = self.get_library('zlib', os.path.join('libz.a'), make_args=['libz.a']) + \
                   ['-I' + path_from_root('tests', 'zlib')]
      native_args = self.get_library('zlib_native', os.path.join('libz.a'), make_args=['libz.a'], native=True) + \
                     ['-I' + path_from_root('tests', 'zlib')]
      self.do_benchmark('zlib', src, ['100000', '500'], '''sizes: 100000,25906
ok.
''',
                        force_c=True, emcc_args=emcc_args, native_args=native_args)

    def test_zzz_bullet(self): # Called thus so it runs late in the alphabetical cycle... it is long
      src = open(path_from_root('tests', 'bullet', 'Demos', 'Benchmarks', 'BenchmarkDemo.cpp'), 'r').read() + \
            open(path_from_root('tests', 'bullet', 'Demos', 'Benchmarks', 'main.cpp'), 'r').read()

      js_lib = self.get_library('bullet', [os.path.join('src', '.libs', 'libBulletDynamics.a'),
                                           os.path.join('src', '.libs', 'libBulletCollision.a'),
                                           os.path.join('src', '.libs', 'libLinearMath.a')],
                                configure_args=['--disable-demos','--disable-dependency-tracking'])
      native_lib = self.get_library('bullet_native', [os.path.join('src', '.libs', 'libBulletDynamics.a'),
                                               os.path.join('src', '.libs', 'libBulletCollision.a'),
                                               os.path.join('src', '.libs', 'libLinearMath.a')],
                                    configure_args=['--disable-demos','--disable-dependency-tracking'],
                                    native=True)

      emcc_args = js_lib + ['-I' + path_from_root('tests', 'bullet', 'src'),
                            '-I' + path_from_root('tests', 'bullet', 'Demos', 'Benchmarks'),
                            '-s', 'DEAD_FUNCTIONS=["__ZSt9terminatev"]']
      native_args = native_lib + ['-I' + path_from_root('tests', 'bullet', 'src'),
                                  '-I' + path_from_root('tests', 'bullet', 'Demos', 'Benchmarks')]

      self.do_benchmark('bullet', src, [], '\nok.\n', emcc_args=emcc_args, native_args=native_args, reps=1)

elif 'sanity' in str(sys.argv):

  # Run some sanity checks on the test runner and emcc.

  sys.argv = filter(lambda x: x != 'sanity', sys.argv)

  print
  print 'Running sanity checks.'
  print 'WARNING: This will modify %s, and in theory can break it although it should be restored properly. A backup will be saved in %s_backup' % (EM_CONFIG, EM_CONFIG)
  print

  assert os.path.exists(CONFIG_FILE), 'To run these tests, we need a (working!) %s file to already exist' % EM_CONFIG

  assert not os.environ.get('EMCC_DEBUG'), 'do not run sanity checks in debug mode!'

  shutil.copyfile(CONFIG_FILE, CONFIG_FILE + '_backup')
  def restore():
    shutil.copyfile(CONFIG_FILE + '_backup', CONFIG_FILE)

  SANITY_FILE = CONFIG_FILE + '_sanity'

  def wipe():
    try_delete(CONFIG_FILE)
    try_delete(SANITY_FILE)

  commands = [[EMCC], [PYTHON, path_from_root('tests', 'runner.py'), 'blahblah']]

  def mtime(filename):
    return os.stat(filename).st_mtime

  class sanity(RunnerCore):
    def setUp(self):
      wipe()

    def tearDown(self):
      restore()

    def do(self, command):
      if type(command) is not list:
        command = [command]
      if command[0] == EMCC:
        command = [PYTHON] + command

      return Popen(command, stdout=PIPE, stderr=STDOUT).communicate()[0]

    def check_working(self, command, expected=None):
      if type(command) is not list:
        command = [command]
      if expected is None:
        if command[0] == EMCC:
          expected = 'no input files'
        else:
          expected = "has no attribute 'blahblah'"

      output = self.do(command)
      self.assertContained(expected, output)
      return output

    def test_aaa_normal(self): # this should be the very first thing that runs. if this fails, everything else is irrelevant!
      for command in commands:
        # Your existing EM_CONFIG should work!
        restore()
        self.check_working(command)

    def test_firstrun(self):
      for command in commands:
        wipe()
        output = self.do(command)

        self.assertContained('Welcome to Emscripten!', output)
        self.assertContained('This is the first time any of the Emscripten tools has been run.', output)
        self.assertContained('A settings file has been copied to %s, at absolute path: %s' % (EM_CONFIG, CONFIG_FILE), output)
        self.assertContained('It contains our best guesses for the important paths, which are:', output)
        self.assertContained('LLVM_ROOT', output)
        self.assertContained('NODE_JS', output)
        self.assertContained('Please edit the file if any of those are incorrect', output)
        self.assertContained('This command will now exit. When you are done editing those paths, re-run it.', output)
        assert output.split()[-1].endswith('===='), 'We should have stopped: ' + output
        config_file = open(CONFIG_FILE).read()
        template_file = open(path_from_root('tools', 'settings_template_readonly.py')).read()
        self.assertNotContained('~/.emscripten', config_file)
        self.assertContained('~/.emscripten', template_file)
        self.assertNotContained('{{{', config_file)
        self.assertNotContained('}}}', config_file)
        self.assertContained('{{{', template_file)
        self.assertContained('}}}', template_file)
        for content in ['EMSCRIPTEN_ROOT', 'LLVM_ROOT', 'NODE_JS', 'TEMP_DIR', 'COMPILER_ENGINE', 'JS_ENGINES']:
          self.assertContained(content, config_file)

        # The guessed config should be ok XXX This depends on your local system! it is possible `which` guesses wrong
        #try_delete('a.out.js')
        #output = Popen([PYTHON, EMCC, path_from_root('tests', 'hello_world.c')], stdout=PIPE, stderr=PIPE).communicate()
        #self.assertContained('hello, world!', run_js('a.out.js'), output)

        # Second run, with bad EM_CONFIG
        for settings in ['blah', 'LLVM_ROOT="blarg"; JS_ENGINES=[]; COMPILER_ENGINE=NODE_JS=SPIDERMONKEY_ENGINE=[]']:
          f = open(CONFIG_FILE, 'w')
          f.write(settings)
          f.close()
          output = self.do(command)

          if 'LLVM_ROOT' not in settings:
            self.assertContained('Error in evaluating %s' % EM_CONFIG, output)
          else:
            self.assertContained('FATAL', output) # sanity check should fail

    def test_closure_compiler(self):
      CLOSURE_FATAL = 'fatal: Closure compiler'
      CLOSURE_WARNING = 'WARNING: Closure compiler'

      # Sanity check should find closure
      restore()
      output = self.check_working(EMCC)
      self.assertNotContained(CLOSURE_FATAL, output)
      self.assertNotContained(CLOSURE_WARNING, output)

      # Append a bad path for closure, will warn
      f = open(CONFIG_FILE, 'a')
      f.write('CLOSURE_COMPILER = "/tmp/nowhere/nothingtoseehere/kjadsfkjwelkjsdfkqgas/nonexistent.txt"\n')
      f.close()
      output = self.check_working(EMCC, CLOSURE_WARNING)

      # And if you actually try to use the bad path, will be fatal
      f = open(CONFIG_FILE, 'a')
      f.write('CLOSURE_COMPILER = "/tmp/nowhere/nothingtoseehere/kjadsfkjwelkjsdfkqgas/nonexistent.txt"\n')
      f.close()
      output = self.check_working([EMCC, '-O2', '--closure', '1', 'tests/hello_world.cpp'], CLOSURE_FATAL)

      # With a working path, all is well
      restore()
      try_delete('a.out.js')
      output = self.check_working([EMCC, '-O2', '--closure', '1', 'tests/hello_world.cpp'], '')
      assert os.path.exists('a.out.js')

    def test_llvm(self):
      LLVM_WARNING = 'warning: LLVM version appears incorrect'

      restore()

      # Clang should report the version number we expect, and emcc should not warn
      assert check_clang_version()
      output = self.check_working(EMCC)
      assert LLVM_WARNING not in output, output

      # Fake a different llvm version
      restore()
      f = open(CONFIG_FILE, 'a')
      f.write('LLVM_ROOT = "' + path_from_root('tests', 'fake') + '"')
      f.close()

      if not os.path.exists(path_from_root('tests', 'fake')):
        os.makedirs(path_from_root('tests', 'fake'))

      try:
        os.environ['EM_IGNORE_SANITY'] = '1'
        for x in range(-2, 3):
          for y in range(-2, 3):
            f = open(path_from_root('tests', 'fake', 'clang'), 'w')
            f.write('#!/bin/sh\n')
            f.write('echo "clang version %d.%d" 1>&2\n' % (EXPECTED_LLVM_VERSION[0] + x, EXPECTED_LLVM_VERSION[1] + y))
            f.close()
            shutil.copyfile(path_from_root('tests', 'fake', 'clang'), path_from_root('tests', 'fake', 'clang++'))
            os.chmod(path_from_root('tests', 'fake', 'clang'), stat.S_IREAD | stat.S_IWRITE | stat.S_IEXEC)
            os.chmod(path_from_root('tests', 'fake', 'clang++'), stat.S_IREAD | stat.S_IWRITE | stat.S_IEXEC)
            if x != 0 or y != 0:
              output = self.check_working(EMCC, LLVM_WARNING)
            else:
              output = self.check_working(EMCC)
              assert LLVM_WARNING not in output, output
      finally:
        del os.environ['EM_IGNORE_SANITY']

    def test_node(self):
      NODE_WARNING = 'warning: node version appears too old'
      NODE_WARNING_2 = 'warning: cannot check node version'

      restore()

      # Clang should report the version number we expect, and emcc should not warn
      assert check_node_version()
      output = self.check_working(EMCC)
      assert NODE_WARNING not in output, output

      # Fake a different node version
      restore()
      f = open(CONFIG_FILE, 'a')
      f.write('NODE_JS = "' + path_from_root('tests', 'fake', 'nodejs') + '"')
      f.close()

      if not os.path.exists(path_from_root('tests', 'fake')):
        os.makedirs(path_from_root('tests', 'fake'))

      try:
        os.environ['EM_IGNORE_SANITY'] = '1'
        for version, succeed in [(('v0.6.6'), False), (('v0.6.7'), False), (('v0.6.8'), True), (('v0.6.9'), True), (('v0.7.1'), True), (('v0.7.9'), True), (('v0.8.7'), True), (('v0.8.9'), True), ('cheez', False)]:
          f = open(path_from_root('tests', 'fake', 'nodejs'), 'w')
          f.write('#!/bin/sh\n')
          f.write('''if [ $1 = "--version" ]; then
  echo "%s"
else
  %s $@
fi
''' % (version, NODE_JS))
          f.close()
          os.chmod(path_from_root('tests', 'fake', 'nodejs'), stat.S_IREAD | stat.S_IWRITE | stat.S_IEXEC)
          if not succeed:
            if version[0] == 'v':
              self.check_working(EMCC, NODE_WARNING)
            else:
              self.check_working(EMCC, NODE_WARNING_2)
          else:
            output = self.check_working(EMCC)
            assert NODE_WARNING not in output, output
      finally:
        del os.environ['EM_IGNORE_SANITY']

    def test_emcc(self):
      SANITY_MESSAGE = 'Emscripten: Running sanity checks'
      SANITY_FAIL_MESSAGE = 'sanity check failed to run'

      # emcc should check sanity if no ${EM_CONFIG}_sanity
      restore()
      time.sleep(0.1)
      assert not os.path.exists(SANITY_FILE) # restore is just the settings, not the sanity
      output = self.check_working(EMCC)
      self.assertContained(SANITY_MESSAGE, output)
      assert os.path.exists(SANITY_FILE) # EMCC should have checked sanity successfully
      assert mtime(SANITY_FILE) >= mtime(CONFIG_FILE)
      assert open(SANITY_FILE).read() == EMSCRIPTEN_VERSION
      self.assertNotContained(SANITY_FAIL_MESSAGE, output)

      # emcc run again should not sanity check, because the sanity file is newer
      output = self.check_working(EMCC)
      self.assertNotContained(SANITY_MESSAGE, output)
      self.assertNotContained(SANITY_FAIL_MESSAGE, output)

      # correct sanity contents mean we need not check
      open(SANITY_FILE, 'w').write(EMSCRIPTEN_VERSION)
      output = self.check_working(EMCC)
      self.assertNotContained(SANITY_MESSAGE, output)

      # incorrect sanity contents mean we *must* check
      open(SANITY_FILE, 'w').write('wakawaka')
      output = self.check_working(EMCC)
      self.assertContained(SANITY_MESSAGE, output)

      # but with EMCC_DEBUG=1 we should check
      try:
        os.environ['EMCC_DEBUG'] = '1'
        output = self.check_working(EMCC)
      finally:
        del os.environ['EMCC_DEBUG']
      self.assertContained(SANITY_MESSAGE, output)
      output = self.check_working(EMCC)
      self.assertNotContained(SANITY_MESSAGE, output)

      # But the test runner should
      output = self.check_working(commands[1])
      self.assertContained(SANITY_MESSAGE, output)
      self.assertNotContained(SANITY_FAIL_MESSAGE, output)

      # Make sure the test runner didn't do anything to the setup
      output = self.check_working(EMCC)
      self.assertNotContained(SANITY_MESSAGE, output)
      self.assertNotContained(SANITY_FAIL_MESSAGE, output)

      # emcc should also check sanity if the file is outdated
      time.sleep(0.1)
      restore()
      assert mtime(SANITY_FILE) < mtime(CONFIG_FILE)
      output = self.check_working(EMCC)
      self.assertContained(SANITY_MESSAGE, output)
      assert mtime(SANITY_FILE) >= mtime(CONFIG_FILE)
      self.assertNotContained(SANITY_FAIL_MESSAGE, output)

      # emcc should be configurable directly from EM_CONFIG without any config file
      restore()
      config = open(CONFIG_FILE, 'r').read()
      os.environ['EM_CONFIG'] = config
      wipe()
      dirname = tempfile.mkdtemp(prefix='emscripten_test_' + self.__class__.__name__ + '_', dir=TEMP_DIR)
      open(os.path.join(dirname, 'main.cpp'), 'w').write('''
        #include <stdio.h>
        int main() {
          printf("hello from emcc with no config file\\n");
          return 0;
        }
      ''')
      Popen([PYTHON, EMCC, os.path.join(dirname, 'main.cpp'), '-o', os.path.join(dirname, 'a.out.js')]).communicate()
      del os.environ['EM_CONFIG']
      self.assertContained('hello from emcc with no config file', run_js(os.path.join(dirname, 'a.out.js')))
      shutil.rmtree(dirname)

      try_delete(CANONICAL_TEMP_DIR)

    def test_emcc_caching(self):
      INCLUDING_MESSAGE = 'emcc: including X'
      BUILDING_MESSAGE = 'emcc: building X for cache'
      ERASING_MESSAGE = 'emcc: clearing cache'

      EMCC_CACHE = Cache.dirname

      for compiler in [EMCC, EMXX]:
        print compiler

        restore()

        Cache.erase()
        assert not os.path.exists(EMCC_CACHE)

        try:
          os.environ['EMCC_DEBUG'] ='1'
          self.working_dir = os.path.join(TEMP_DIR, 'emscripten_temp')

          # Building a file that doesn't need cached stuff should not trigger cache generation
          output = self.do([compiler, path_from_root('tests', 'hello_world.cpp')])
          assert INCLUDING_MESSAGE.replace('X', 'libc') not in output
          assert BUILDING_MESSAGE.replace('X', 'libc') not in output
          self.assertContained('hello, world!', run_js('a.out.js'))
          assert not os.path.exists(EMCC_CACHE)
          try_delete('a.out.js')

          basebc_name = os.path.join(TEMP_DIR, 'emscripten_temp', 'emcc-0-basebc.bc')
          dcebc_name1 = os.path.join(TEMP_DIR, 'emscripten_temp', 'emcc-1-linktime.bc')
          dcebc_name2 = os.path.join(TEMP_DIR, 'emscripten_temp', 'emcc-2-linktime.bc')
          ll_names = [os.path.join(TEMP_DIR, 'emscripten_temp', 'emcc-X-ll.ll').replace('X', str(x)) for x in range(2,5)]

          # Building a file that *does* need dlmalloc *should* trigger cache generation, but only the first time
          for filename, libname in [('hello_malloc.cpp', 'libc'), ('hello_libcxx.cpp', 'libcxx')]:
            for i in range(3):
              print filename, libname, i
              self.clear()
              dcebc_name = dcebc_name1 if i == 0 else dcebc_name2
              try_delete(basebc_name) # we might need to check this file later
              try_delete(dcebc_name) # we might need to check this file later
              for ll_name in ll_names: try_delete(ll_name)
              output = self.do([compiler, '-O' + str(i), '-s', 'RELOOP=0', '--llvm-lto', '0', path_from_root('tests', filename)])
              #print output
              assert INCLUDING_MESSAGE.replace('X', libname) in output
              if libname == 'libc':
                assert INCLUDING_MESSAGE.replace('X', 'libcxx') not in output # we don't need libcxx in this code
              else:
                assert INCLUDING_MESSAGE.replace('X', 'libc') in output # libcxx always forces inclusion of libc
              assert (BUILDING_MESSAGE.replace('X', libname) in output) == (i == 0), 'Must only build the first time'
              self.assertContained('hello, world!', run_js('a.out.js'))
              assert os.path.exists(EMCC_CACHE)
              assert os.path.exists(os.path.join(EMCC_CACHE, libname + '.bc'))
              if libname == 'libcxx':
                print os.stat(os.path.join(EMCC_CACHE, libname + '.bc')).st_size, os.stat(basebc_name).st_size, os.stat(dcebc_name).st_size
                assert os.stat(os.path.join(EMCC_CACHE, libname + '.bc')).st_size > 1800000, 'libc++ is big'
                assert os.stat(basebc_name).st_size > 1800000, 'libc++ is indeed big'
                assert os.stat(dcebc_name).st_size < 750000, 'Dead code elimination must remove most of libc++'
              # should only have metadata in -O0, not 1 and 2
              if i > 0:
                for ll_name in ll_names:
                  ll = None
                  try:
                    ll = open(ll_name).read()
                    break
                  except:
                    pass
                assert ll
                assert ll.count('\n!') < 10 # a few lines are left even in -O1 and -O2
        finally:
          del os.environ['EMCC_DEBUG']

      # Manual cache clearing
      assert os.path.exists(EMCC_CACHE)
      output = self.do([EMCC, '--clear-cache'])
      assert ERASING_MESSAGE in output
      assert not os.path.exists(EMCC_CACHE)

      try_delete(CANONICAL_TEMP_DIR)

    def test_relooper(self):
      RELOOPER = Cache.get_path('relooper.js')

      restore()
      for phase in range(2): # 0: we wipe the relooper dir. 1: we have it, so should just update
        if phase == 0: Cache.erase()
        try_delete(RELOOPER)

        for i in range(4):
          print >> sys.stderr, phase, i
          opt = min(i, 2)
          try_delete('a.out.js')
          output = Popen([PYTHON, EMCC, path_from_root('tests', 'hello_world_loop.cpp'), '-O' + str(opt)],
                         stdout=PIPE, stderr=PIPE).communicate()
          self.assertContained('hello, world!', run_js('a.out.js'))
          output = '\n'.join(output)
          assert ('bootstrapping relooper succeeded' in output) == (i == 2), 'only bootstrap on first O2: ' + output
          assert os.path.exists(RELOOPER) == (i >= 2), 'have relooper on O2: ' + output
          src = open('a.out.js').read()
          main = src.split('function _main()')[1].split('\n}\n')[0]
          assert ('while (1) {' in main or 'while(1){' in main) == (i >= 2), 'reloop code on O2: ' + main
          assert ('switch' not in main) == (i >= 2), 'reloop code on O2: ' + main

    def test_jcache(self):
      PRE_LOAD_MSG = 'loading pre from jcache'
      PRE_SAVE_MSG = 'saving pre to jcache'
      FUNC_CHUNKS_LOAD_MSG = ' funcchunks from jcache'
      FUNC_CHUNKS_SAVE_MSG = ' funcchunks to jcache'
      JSFUNC_CHUNKS_LOAD_MSG = 'jsfuncchunks from jcache'
      JSFUNC_CHUNKS_SAVE_MSG = 'jsfuncchunks to jcache'

      restore()
      Cache.erase()

      try:
        os.environ['EMCC_DEBUG'] = '1'
        os.environ['EMCC_JSOPT_MIN_CHUNK_SIZE'] = str(1024*512)

        self.working_dir = os.path.join(TEMP_DIR, 'emscripten_temp')
        if not os.path.exists(self.working_dir): os.makedirs(self.working_dir)

        assert not os.path.exists(JCache.get_cachename('emscript_files'))

        srcs = {}
        used_jcache = False

        for args, input_file, expect_pre_save, expect_pre_load, expect_funcs_save, expect_funcs_load, expect_jsfuncs_save, expect_jsfuncs_load, expected in [
          ([], 'hello_world_loop.cpp', False, False, False, False, False, False, []),
          (['--jcache'], 'hello_world_loop.cpp', True, False, True, False, True, False, []),
          (['--jcache'], 'hello_world_loop.cpp', False, True, False, True, False, True, []),
          ([], 'hello_world_loop.cpp', False, False, False, False, False, False, []),
          # new
          ([], 'hello_world.cpp', False, False, False, False, False, False, []),
          (['--jcache'], 'hello_world.cpp', True, False, True, False, True, False, []),
          (['--jcache'], 'hello_world.cpp', False, True, False, True, False, True, []),
          ([], 'hello_world.cpp', False, False, False, False, False, False, []),
          # go back to old file, experience caching
          (['--jcache'], 'hello_world_loop.cpp', False, True, False, True, False, True, []),
          # new, large file
          ([], 'hello_malloc.cpp', False, False, False, False, False, False, []),
          (['--jcache'], 'hello_malloc.cpp', True, False, True, False, True, False, []),
          (['--jcache'], 'hello_malloc.cpp', False, True, False, True, False, True, []),
          ([], 'hello_malloc.cpp', False, False, False, False, False, False, []),
          # new, huge file
          ([], 'hello_libcxx.cpp', False, False, False, False, False, False, ('3 chunks',)),
          (['--jcache'], 'hello_libcxx.cpp', True, False, True, False, True, False, []),
          (['--jcache'], 'hello_libcxx.cpp', False, True, False, True, False, True, []),
          ([], 'hello_libcxx.cpp', False, False, False, False, False, False, []),
          # finally, build a file close to the previous, to see that some chunks are found in the cache and some not
          (['--jcache'], 'hello_libcxx_mod1.cpp', False, True, True, True, True, True, []), # win on pre, mix on funcs, mix on jsfuncs
          (['--jcache'], 'hello_libcxx_mod1.cpp', False, True, False, True, False, True, []),
          (None, None, None, None, None, None, None, None, None), # clear
          (['--jcache'], 'hello_libcxx_mod2.cpp', True, False, True, False, True, False, []), # load into cache
          (['--jcache'], 'hello_libcxx_mod2a.cpp', False, True, True, True, True, True, []) # add a printf, do not lose everything
        ]:
          self.clear()
          if args is None:
            Cache.erase()
            continue

          print >> sys.stderr, args, input_file, expect_pre_save, expect_pre_load, expect_funcs_save, expect_funcs_load, expect_jsfuncs_save, expect_jsfuncs_load, expected
            
          out, err = Popen([PYTHON, EMCC, '-O2', path_from_root('tests', input_file)] + args, stdout=PIPE, stderr=PIPE).communicate()
          errtail = err.split('emcc invocation')[-1]
          self.assertContained('hello, world!', run_js('a.out.js'), errtail)
          assert (PRE_SAVE_MSG in err) == expect_pre_save, errtail
          assert (PRE_LOAD_MSG in err) == expect_pre_load, errtail
          assert (FUNC_CHUNKS_SAVE_MSG in err) == expect_funcs_save, errtail
          assert (FUNC_CHUNKS_LOAD_MSG in err) == expect_funcs_load, errtail
          assert (JSFUNC_CHUNKS_SAVE_MSG in err) == expect_jsfuncs_save, errtail
          assert (JSFUNC_CHUNKS_LOAD_MSG in err) == expect_jsfuncs_load, errtail
          for expect in expected: assert expect in err, expect + ' ? ' + errtail
          curr = open('a.out.js').read()
          if input_file not in srcs:
            srcs[input_file] = curr
          else:
            #open('/home/alon/Dev/emscripten/a', 'w').write(srcs[input_file])
            #open('/home/alon/Dev/emscripten/b', 'w').write(curr)
            assert abs(len(curr)/float(len(srcs[input_file]))-1)<0.01, 'contents may shift in order, but must remain the same size  %d vs %d' % (len(curr), len(srcs[input_file])) + '\n' + errtail
          used_jcache = used_jcache or ('--jcache' in args)
          assert used_jcache == os.path.exists(JCache.get_cachename('emscript_files'))
          #print >> sys.stderr, errtail

      finally:
        del os.environ['EMCC_DEBUG']
        del os.environ['EMCC_JSOPT_MIN_CHUNK_SIZE']

else:
  raise Exception('Test runner is confused: ' + str(sys.argv))

if __name__ == '__main__':
  sys.argv = [sys.argv[0]] + ['-v'] + sys.argv[1:] # Verbose output by default

  # Sanity checks

  check_sanity(force=True)

  total_engines = len(JS_ENGINES)
  JS_ENGINES = filter(check_engine, JS_ENGINES)
  if len(JS_ENGINES) == 0:
    print 'WARNING: None of the JS engines in JS_ENGINES appears to work.'
  elif len(JS_ENGINES) < total_engines:
    print 'WARNING: Not all the JS engines in JS_ENGINES appears to work, ignoring those.'

  # Skip requested tests

  for i in range(len(sys.argv)):
    arg = sys.argv[i]
    if arg.startswith('skip:'):
      which = arg.split('skip:')[1]
      print >> sys.stderr, 'will skip "%s"' % which
      exec(which + ' = RunnerCore.skipme')
      sys.argv[i] = ''
  sys.argv = filter(lambda arg: arg, sys.argv)

  # Go

  unittest.main()