Reland "Postpone termination exceptions in debug scope."

test/cctest/test-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 7356 matching lines @@
 bool terminate_already_fired = false;
 
 
 static void DebugBreakTriggerTerminate(
     const v8::Debug::EventDetails& event_details) {
   if (event_details.GetEvent() != v8::Break || terminate_already_fired) return;
   terminate_requested_semaphore.Signal();
   // Wait for at most 2 seconds for the terminate request.
   CHECK(terminate_fired_semaphore.WaitFor(v8::base::TimeDelta::FromSeconds(2)));
   terminate_already_fired = true;
-  v8::internal::Isolate* isolate =
-      v8::Utils::OpenHandle(*event_details.GetEventContext())->GetIsolate();
-  CHECK(isolate->stack_guard()->CheckTerminateExecution());
 }
 
 
 class TerminationThread : public v8::base::Thread {
  public:
   explicit TerminationThread(v8::Isolate* isolate) : Thread("terminator"),
                                                      isolate_(isolate) { }
 
   virtual void Run() {
     terminate_requested_semaphore.Wait();
     v8::V8::TerminateExecution(isolate_);
     terminate_fired_semaphore.Signal();
   }
 
  private:
   v8::Isolate* isolate_;
 };
 
 
 TEST(DebugBreakOffThreadTerminate) {
   DebugLocalContext env;
   v8::Isolate* isolate = env->GetIsolate();
   v8::HandleScope scope(isolate);
   v8::Debug::SetDebugEventListener(DebugBreakTriggerTerminate);
   TerminationThread terminator(isolate);
   terminator.Start();
+  v8::TryCatch try_catch;
   v8::Debug::DebugBreak(isolate);
   CompileRun("while (true);");
+  CHECK(try_catch.HasTerminated());
 }