Support Promises event-based instrumentation on backend.

Source/bindings/core/v8/ScriptDebugServer.cpp

Index: Source/bindings/core/v8/ScriptDebugServer.cpp
diff --git a/Source/bindings/core/v8/ScriptDebugServer.cpp b/Source/bindings/core/v8/ScriptDebugServer.cpp
index 0aa99494ea405bc988179bea9e2ab697472294c9..0234ef93bea1803023c0345c7e8eb08a62be904d 100644
--- a/Source/bindings/core/v8/ScriptDebugServer.cpp
+++ b/Source/bindings/core/v8/ScriptDebugServer.cpp
@@ -471,7 +471,7 @@ void ScriptDebugServer::handleV8DebugEvent(const v8::Debug::EventDetails& eventD
         return;
     }
 
-    if (event != v8::AsyncTaskEvent && event != v8::Break && event != v8::Exception && event != v8::AfterCompile && event != v8::BeforeCompile && event != v8::CompileError)
+    if (event != v8::AsyncTaskEvent && event != v8::Break && event != v8::Exception && event != v8::AfterCompile && event != v8::BeforeCompile && event != v8::CompileError && event != v8::PromiseEvent)
         return;
 
     v8::Handle<v8::Context> eventContext = eventDetails.GetEventContext();
@@ -503,6 +503,8 @@ void ScriptDebugServer::handleV8DebugEvent(const v8::Debug::EventDetails& eventD
             handleProgramBreak(ScriptState::from(eventContext), eventDetails.GetExecutionState(), v8::Handle<v8::Value>(), hitBreakpoints.As<v8::Array>());
         } else if (event == v8::AsyncTaskEvent) {
             handleV8AsyncTaskEvent(listener, ScriptState::from(eventContext), eventDetails.GetExecutionState(), eventDetails.GetEventData());
+        } else if (event == v8::PromiseEvent) {
+            handleV8PromiseEvent(listener, ScriptState::from(eventContext), eventDetails.GetExecutionState(), eventDetails.GetEventData());
         }
     }
 }
@@ -526,6 +528,22 @@ void ScriptDebugServer::handleV8AsyncTaskEvent(ScriptDebugListener* listener, Sc
     m_executionState.Clear();
 }
 
+void ScriptDebugServer::handleV8PromiseEvent(ScriptDebugListener* listener, ScriptState* pausedScriptState, v8::Handle<v8::Object> executionState, v8::Handle<v8::Object> eventData)
+{
+    m_pausedScriptState = pausedScriptState;
+    m_executionState = executionState;
+    v8::Isolate* isolate = m_pausedScriptState->isolate();
+    v8::Handle<v8::Value> argv[] = { eventData };
+    v8::Local<v8::Object> promiseDetails = callDebuggerMethod("getPromiseDetails", 1, argv)->ToObject();
+    ScopedPersistent<v8::Object> promise(isolate, promiseDetails->Get(v8AtomicString(m_isolate, "promise"))->ToObject());
+    int status = static_cast<int>(promiseDetails->Get(v8AtomicString(m_isolate, "status"))->ToInteger()->Value());

[aandrey, 2014/08/04 16:58:47]

why static_cast<int>?

[Alexandra Mikhaylova, 2014/08/06 13:28:38]

Removed it.

+    v8::Handle<v8::Value> parentPromiseHandle = promiseDetails->Get(v8AtomicString(m_isolate, "parentPromise"));
+    ScopedPersistent<v8::Object> parentPromise(isolate, parentPromiseHandle->IsUndefined() ? v8::Handle<v8::Object>() : parentPromiseHandle->ToObject());

[aandrey, 2014/08/04 16:58:47]

use IsObject() instead of IsUndefined()

[Alexandra Mikhaylova, 2014/08/06 13:28:39]

Done.

+    listener->didReceiveV8PromiseEvent(pausedScriptState, promise, parentPromise, status);

[aandrey, 2014/08/04 16:58:47]

nit: line break before, assign m_pausedScriptState and m_executionState just
before this line, as in lines 523-528

[Alexandra Mikhaylova, 2014/08/06 13:28:38]

Done.

+    m_pausedScriptState.clear();
+    m_executionState.Clear();
+}
+
 void ScriptDebugServer::dispatchDidParseSource(ScriptDebugListener* listener, v8::Handle<v8::Object> object, CompileResult compileResult)
 {
     v8::Handle<v8::Value> id = object->Get(v8AtomicString(m_isolate, "id"));