void NotifyTimezoneChangeOnThisThread() {
  v8::Isolate* isolate = v8::Isolate::GetCurrent();
  if (!isolate)
    return;
  v8::Date::DateTimeConfigurationChangeNotification(isolate);
}

The product contains a concurrent code sequence that requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence operating concurrently.