Add wasm64 workarounds

Author: RReverser

emscripten.py

@@ -932,6 +932,7 @@ def create_pointer_conversion_wrappers(metadata):
     'asyncify_start_rewind': '_p',
     'asyncify_start_unwind': '_p',
     '__get_exception_message': '_ppp',
+    '_emval_coro_resume': '_pp',
   }
 
   for function in settings.SIGNATURE_CONVERSIONS:

test/embind/test_val_coro.cpp

@@ -6,7 +6,13 @@
 using namespace emscripten;
 
 EM_JS(EM_VAL, promise_sleep_impl, (int ms, int result), {
-  return Emval.toHandle(new Promise(resolve => setTimeout(resolve, ms, result)));
+  let promise = new Promise(resolve => setTimeout(resolve, ms, result));
+  let handle = Emval.toHandle(promise);
+  // FIXME. See https://github.com/emscripten-core/emscripten/issues/16975.
+#if __wasm64__
+  handle = BigInt(handle);
+#endif
+  return handle;
 });
 
 val promise_sleep(int ms, int result = 0) {