Mark await expressions as caught or uncaught

src/isolate.h

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef V8_ISOLATE_H_
 #define V8_ISOLATE_H_
 
 #include <memory>
 #include <queue>
 
@@ skipping 656 matching lines @@
   // This method is called by the api after operations that may throw
   // exceptions.  If an exception was thrown and not handled by an external
   // handler the exception is scheduled to be rethrown when we return to running
   // JavaScript code.  If an exception is scheduled true is returned.
   bool OptionalRescheduleException(bool is_bottom_call);
 
   // Push and pop a promise and the current try-catch handler.
   void PushPromise(Handle<JSObject> promise);
   void PopPromise();
   Handle<Object> GetPromiseOnStackOnThrow();
+  bool PromiseHasUserDefinedRejectHandler(Handle<JSObject> promise);
 
   class ExceptionScope {
    public:
     // Scope currently can only be used for regular exceptions,
     // not termination exception.
     inline explicit ExceptionScope(Isolate* isolate);
     inline ~ExceptionScope();
 
    private:
     Isolate* isolate_;
@@ skipping 57 matching lines @@
   // clears and returns the current pending exception.
   Object* UnwindAndFindHandler();
 
   // Tries to predict whether an exception will be caught. Note that this can
   // only produce an estimate, because it is undecidable whether a finally
   // clause will consume or re-throw an exception.
   enum CatchType {
     NOT_CAUGHT,
     CAUGHT_BY_JAVASCRIPT,
     CAUGHT_BY_EXTERNAL,
-    CAUGHT_BY_DESUGARING
+    CAUGHT_BY_DESUGARING,
+    CAUGHT_BY_PROMISE,
+    CAUGHT_BY_ASYNC_AWAIT
   };
   CatchType PredictExceptionCatcher();
 
   void ScheduleThrow(Object* exception);
   // Re-set pending message, script and positions reported to the TryCatch
   // back to the TLS for re-use when rethrowing.
   void RestorePendingMessageFromTryCatch(v8::TryCatch* handler);
   // Un-schedule an exception that was caught by a TryCatch handler.
   void CancelScheduledExceptionFromTryCatch(v8::TryCatch* handler);
   void ReportPendingMessages();
@@ skipping 906 matching lines @@
 
   EmbeddedVector<char, 128> filename_;
   FILE* file_;
   int scope_depth_;
 };
 
 }  // namespace internal
 }  // namespace v8
 
 #endif  // V8_ISOLATE_H_