Function malloc

test/pthread/test_pthread_proxy_deadlock.c:18–24

In the actual implementation of malloc the system queue may be executed non-deterministically if malloc is waiting on a mutex. This wraps malloc and executes the system queue during every allocation to make the behavior deterministic.

// executes the system queue during every allocation to make the behavior
// deterministic.
void *malloc(size_t size) {
  if (emscripten_is_main_runtime_thread()) {
    emscripten_proxy_execute_queue(emscripten_proxy_get_system_queue());
  }
  void *ptr = emscripten_builtin_malloc(size);
  return ptr;
}

void task(void* arg) {
  emscripten_out("task\n");