Trigger debug event on not yet caught exception in promises.

src/debug.cc

 // Copyright 2012 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 2610 matching lines @@
 MaybeHandle<Object> Debugger::MakeBreakEvent(Handle<Object> break_points_hit) {
   Handle<Object> exec_state;
   if (!MakeExecutionState().ToHandle(&exec_state)) return MaybeHandle<Object>();
   // Create the new break event object.
   Handle<Object> argv[] = { exec_state, break_points_hit };
   return MakeJSObject(CStrVector("MakeBreakEvent"), ARRAY_SIZE(argv), argv);
 }
 
 
 MaybeHandle<Object> Debugger::MakeExceptionEvent(Handle<Object> exception,
-                                                 bool uncaught) {
+                                                 bool uncaught,
+                                                 Handle<Object> promise) {
   Handle<Object> exec_state;
   if (!MakeExecutionState().ToHandle(&exec_state)) return MaybeHandle<Object>();
   // Create the new exception event object.
   Handle<Object> argv[] = { exec_state,
                             exception,
-                            isolate_->factory()->ToBoolean(uncaught) };
+                            isolate_->factory()->ToBoolean(uncaught),
+                            promise };
   return MakeJSObject(CStrVector("MakeExceptionEvent"), ARRAY_SIZE(argv), argv);
 }
 
 
 MaybeHandle<Object> Debugger::MakeCompileEvent(Handle<Script> script,
                                                bool before) {
   Handle<Object> exec_state;
   if (!MakeExecutionState().ToHandle(&exec_state)) return MaybeHandle<Object>();
   // Create the compile event object.
   Handle<Object> script_wrapper = Script::GetWrapper(script);
   Handle<Object> argv[] = { exec_state,
                             script_wrapper,
                             isolate_->factory()->ToBoolean(before) };
   return MakeJSObject(CStrVector("MakeCompileEvent"), ARRAY_SIZE(argv), argv);
 }
 
 
 MaybeHandle<Object> Debugger::MakeScriptCollectedEvent(int id) {
   Handle<Object> exec_state;
   if (!MakeExecutionState().ToHandle(&exec_state)) return MaybeHandle<Object>();
   // Create the script collected event object.
   Handle<Object> id_object = Handle<Smi>(Smi::FromInt(id), isolate_);
   Handle<Object> argv[] = { exec_state, id_object };
 
   return MakeJSObject(
       CStrVector("MakeScriptCollectedEvent"), ARRAY_SIZE(argv), argv);
 }
 
 
-void Debugger::OnException(Handle<Object> exception, bool uncaught) {
+void Debugger::OnException(Handle<Object> exception,
+                           bool uncaught,
+                           Handle<Object> promise) {
   HandleScope scope(isolate_);
   Debug* debug = isolate_->debug();
 
   // Bail out based on state or if there is no listener for this event
   if (debug->InDebugger()) return;
   if (!Debugger::EventActive(v8::Exception)) return;
 
   // Bail out if exception breaks are not active
   if (uncaught) {
     // Uncaught exceptions are reported by either flags.
     if (!(debug->break_on_uncaught_exception() ||
           debug->break_on_exception())) return;
   } else {
     // Caught exceptions are reported is activated.
     if (!debug->break_on_exception()) return;
   }
 
   // Enter the debugger.
   EnterDebugger debugger(isolate_);
   if (debugger.FailedToEnter()) return;
 
   // Clear all current stepping setup.
   debug->ClearStepping();
+
+  // Determine event;
+  DebugEvent event = promise->IsUndefined()
+      ? v8::Exception : v8::UncaughtExceptionInPromise;
+
   // Create the event data object.
   Handle<Object> event_data;
   // Bail out and don't call debugger if exception.
-  if (!MakeExceptionEvent(exception, uncaught).ToHandle(&event_data)) return;
+  if (!MakeExceptionEvent(
+          exception, uncaught, promise).ToHandle(&event_data)) {
+    return;
+  }
 
   // Process debug event.
-  ProcessDebugEvent(v8::Exception, Handle<JSObject>::cast(event_data), false);
+  ProcessDebugEvent(event, Handle<JSObject>::cast(event_data), false);
   // Return to continue execution from where the exception was thrown.
 }
 
 
 void Debugger::OnDebugBreak(Handle<Object> break_points_hit,
                             bool auto_continue) {
   HandleScope scope(isolate_);
 
   // Debugger has already been entered by caller.
   ASSERT(isolate_->context() == *isolate_->debug()->debug_context());
@@ skipping 1028 matching lines @@
     {
       Locker locker(reinterpret_cast<v8::Isolate*>(isolate_));
       isolate_->debugger()->CallMessageDispatchHandler();
     }
   }
 }
 
 #endif  // ENABLE_DEBUGGER_SUPPORT
 
 } }  // namespace v8::internal