added dlopen test to test function pointers with signatures not found in the main module

1 files changed, 51 insertions, 0 deletions

diff --git a/tests/test_core.py b/tests/test_core.py
index 285ba08e..d39ef9a9 100644
--- a/tests/test_core.py
+++ b/tests/test_core.py
@@ -5612,6 +5612,57 @@ The current type of b is: 9
     else:
       Settings.BUILD_AS_SHARED_LIB = 0
 
+  def test_dlfcn_unique_sig(self):
+    if not self.can_dlfcn(): return
+
+    self.prep_dlfcn_lib()
+    lib_src = '''
+      #include <stdio.h>
+      int myfunc(int a, int b, int c, int d, int e, int f, int g, int h, int i, int j, int k, int l, int m) {
+        return 13;
+      }
+      '''
+    Settings.EXPORTED_FUNCTIONS = ['_myfunc']
+    dirname = self.get_dir()
+    filename = os.path.join(dirname, 'liblib.c')
+    self.build(lib_src, dirname, filename)
+    shutil.move(filename + '.o.js', os.path.join(dirname, 'liblib.so'))
+
+    self.prep_dlfcn_main()
+    src = '''
+      #include <assert.h>
+      #include <stdio.h>
+      #include <dlfcn.h>
+
+      typedef int (*FUNCTYPE(int, int, int, int, int, int, int, int, int, int, int, int, int))();
+
+      int main() {
+        void *lib_handle;
+        FUNCTYPE *func_ptr;
+
+        lib_handle = dlopen("liblib.so", RTLD_NOW);
+        assert(lib_handle != NULL);
+
+        func_ptr = (FUNCTYPE*)dlsym(lib_handle, "myfunc");
+        assert(func_ptr != NULL);
+        assert(func_ptr(0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0.0f, 0) == 13);
+
+        puts("success");
+
+        return 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)
+'''
+    Settings.EXPORTED_FUNCTIONS = ['_main', '_malloc']
+    self.do_run(src, 'success', force_c=True, post_build=add_pre_run_and_checks)
+
   def test_dlfcn_basic(self):
     if not self.can_dlfcn(): return