reset the stack top when CATCH_EXIT_CODE

1 files changed, 47 insertions, 0 deletions

diff --git a/tests/runner.py b/tests/runner.py
index e55a3f60..742ddf1f 100755
--- a/tests/runner.py
+++ b/tests/runner.py
@@ -2471,6 +2471,53 @@ 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.CATCH_EXIT_CODE = 1
+
+      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\npostRun\nok.\nExit Status: 1\n''')
+
     def test_class(self):
         src = '''
           #include <stdio.h>