Revision: 21933
Author:   [email protected]
Date:     Mon Jun 23 11:47:20 2014 UTC
Log:      Run JS micro tasks in the appropriate context.

[email protected]
BUG=385349
LOG=Y

Review URL: https://codereview.chromium.org/332923003
http://code.google.com/p/v8/source/detail?r=21933

Modified:
 /branches/bleeding_edge/src/isolate.cc
 /branches/bleeding_edge/test/cctest/test-api.cc

=======================================
--- /branches/bleeding_edge/src/isolate.cc      Mon Jun 23 09:46:58 2014 UTC
+++ /branches/bleeding_edge/src/isolate.cc      Mon Jun 23 11:47:20 2014 UTC
@@ -2292,12 +2292,10 @@


 void Isolate::RunMicrotasks() {
-  // TODO(adamk): This ASSERT triggers in mjsunit tests which
-  // call the %RunMicrotasks runtime function. But it should
-  // never happen outside of tests, so it would be nice to
-  // uncomment it.
-  //
-  // ASSERT(handle_scope_implementer()->CallDepthIsZero());
+  // In some mjsunit tests %RunMicrotasks is called explicitly, violating
+  // this assertion.  Therefore we also check for --allow-natives-syntax.
+  ASSERT(FLAG_allow_natives_syntax ||
+         handle_scope_implementer()->CallDepthIsZero());

   // Increase call depth to prevent recursive callbacks.
   v8::Isolate::SuppressMicrotaskExecutionScope suppress(
@@ -2317,6 +2315,8 @@
       if (microtask->IsJSFunction()) {
         Handle<JSFunction> microtask_function =
             Handle<JSFunction>::cast(microtask);
+        SaveContext save(this);
+        set_context(microtask_function->context()->native_context());
         Handle<Object> exception;
         MaybeHandle<Object> result = Execution::TryCall(
             microtask_function, factory()->undefined_value(),
=======================================
--- /branches/bleeding_edge/test/cctest/test-api.cc Mon Jun 23 09:11:45 2014 UTC +++ /branches/bleeding_edge/test/cctest/test-api.cc Mon Jun 23 11:47:20 2014 UTC
@@ -20826,6 +20826,37 @@
   }
   isolate->SetAutorunMicrotasks(true);
 }
+
+
+static void DebugEventInObserver(const v8::Debug::EventDetails& event_details) {
+  v8::DebugEvent event = event_details.GetEvent();
+  if (event != v8::Break) return;
+  Handle<Object> exec_state = event_details.GetExecutionState();
+  Handle<Value> break_id = exec_state->Get(v8_str("break_id"));
+  CompileRun("function f(id) { new FrameDetails(id, 0); }");
+  Handle<Function> fun = Handle<Function>::Cast(
+      CcTest::global()->Get(v8_str("f"))->ToObject());
+  fun->Call(CcTest::global(), 1, &break_id);
+}
+
+
+TEST(Regress385349) {
+  i::FLAG_allow_natives_syntax = true;
+  v8::Isolate* isolate = CcTest::isolate();
+  HandleScope handle_scope(isolate);
+  isolate->SetAutorunMicrotasks(false);
+  Handle<Context> context = Context::New(isolate);
+  v8::Debug::SetDebugEventListener(DebugEventInObserver);
+  {
+    Context::Scope context_scope(context);
+    CompileRun("var obj = {};"
+               "Object.observe(obj, function(changes) { debugger; });"
+               "obj.a = 0;");
+  }
+  isolate->RunMicrotasks();
+  isolate->SetAutorunMicrotasks(true);
+  v8::Debug::SetDebugEventListener(NULL);
+}


 static int probes_counter = 0;

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