chakrashim: implement promise rejection callback

Author: kfarnung

deps/chakrashim/include/v8.h

@@ -99,6 +99,7 @@ class PropertyDescriptor;
 }
 
 namespace jsrt {
+  class IsolateShim;
   JsErrorCode CreateV8PropertyDescriptor(JsValueRef descriptor,
     v8::PropertyDescriptor* result);
 }
@@ -377,6 +378,7 @@ class Local {
   friend JsErrorCode jsrt::CreateV8PropertyDescriptor(
     JsValueRef descriptor,
     v8::PropertyDescriptor* result);
+  friend class jsrt::IsolateShim;
   template <class F> friend class FunctionCallbackInfo;
   template <class F> friend class MaybeLocal;
   template <class F> friend class PersistentBase;

deps/chakrashim/src/jsrtisolateshim.cc

@@ -643,6 +643,24 @@ JsValueRef IsolateShim::GetChakraInspectorShimJsArrayBuffer() {
   return chakraInspectorShimArrayBuffer;
 }
 
+void IsolateShim::PromiseRejectionThunk(
+    JsValueRef promise, JsValueRef reason, bool handled, void *callbackState) {
+  CHAKRA_VERIFY(callbackState != nullptr);
+  v8::PromiseRejectCallback callback = reinterpret_cast<v8::PromiseRejectCallback>(callbackState);
+
+  v8::PromiseRejectMessage message(
+      promise,
+      handled ? v8::kPromiseHandlerAddedAfterReject : v8::kPromiseRejectWithNoHandler,
+      reason,
+      v8::Local<v8::StackTrace>());
+
+  callback(message);
+}
+
+void IsolateShim::SetPromiseRejectCallback(v8::PromiseRejectCallback callback) {
+  JsSetHostPromiseRejectionTracker(IsolateShim::PromiseRejectionThunk, reinterpret_cast<void*>(callback));
+}
+
 /*static*/
 bool IsolateShim::RunSingleStepOfReverseMoveLoop(v8::Isolate* isolate,
                                                  uint64_t* moveMode,

deps/chakrashim/src/jsrtisolateshim.h

@@ -161,13 +161,16 @@ class IsolateShim {
     return isIdleGcScheduled;
   }
 
+  void SetPromiseRejectCallback(v8::PromiseRejectCallback callback);
+
  private:
   // Construction/Destruction should go thru New/Dispose
   explicit IsolateShim(JsRuntimeHandle runtime);
   ~IsolateShim();
   static v8::Isolate * ToIsolate(IsolateShim * isolate);
   static void CHAKRA_CALLBACK JsContextBeforeCollectCallback(JsRef contextRef,
                                                              void *data);
+  static void PromiseRejectionThunk(JsValueRef promise, JsValueRef reason, bool handled, void *callbackState);
 
   JsRuntimeHandle runtime;
   JsPropertyIdRef symbolPropertyIdRefs[CachedSymbolPropertyIdRef::SymbolCount];

deps/chakrashim/src/v8isolate.cc

@@ -112,7 +112,7 @@ Local<Context> Isolate::GetCurrentContext() {
 }
 
 void Isolate::SetPromiseRejectCallback(PromiseRejectCallback callback) {
-  // CHAKRA does not support this explicit callback
+  jsrt::IsolateShim::FromIsolate(this)->SetPromiseRejectCallback(callback);
 }
 
 void Isolate::SetPromiseHook(PromiseHook hook) {