DevTools: Capture async stacks for event listeners.

Source/core/inspector/InspectorDebuggerAgent.cpp

 /*
  * Copyright (C) 2010 Apple Inc. All rights reserved.
  * Copyright (C) 2010-2011 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
@@ skipping 690 matching lines @@
 {
     m_asyncCallStackTracker.willFireAnimationFrame(document, callbackId);
     return true;
 }
 
 void InspectorDebuggerAgent::didFireAnimationFrame()
 {
     m_asyncCallStackTracker.didFireAsyncCall();
 }
 
+void InspectorDebuggerAgent::didAddEventListener(EventTarget* eventTarget, const AtomicString& eventType, EventListener* listener, bool useCapture)
+{
+    if (m_asyncCallStackTracker.isEnabled())

[yurys, 2013/12/16 15:03:55]

We should be able to avoid this check by setting debugger agent to
InstrumentingAgents only when async tracker is on. Do we have debugger
instrumentation for other events?

[aandrey, 2013/12/16 15:20:22]

The Debugger agent can function both w/ and w/o async stack tracking feature.

This check here is just an optimization, so that we should not call to
scriptDebugServer unless needed.

+        m_asyncCallStackTracker.didAddEventListener(eventTarget, eventType, listener, useCapture, scriptDebugServer().currentCallFrames());
+}
+
+void InspectorDebuggerAgent::didRemoveEventListener(EventTarget* eventTarget, const AtomicString& eventType, EventListener* listener, bool useCapture)
+{
+    m_asyncCallStackTracker.didRemoveEventListener(eventTarget, eventType, listener, useCapture);
+}
+
+void InspectorDebuggerAgent::didRemoveAllEventListeners(EventTarget* eventTarget)
+{
+    m_asyncCallStackTracker.didRemoveAllEventListeners(eventTarget);
+}
+
+void InspectorDebuggerAgent::willHandleEvent(EventTarget* eventTarget, const AtomicString& eventType, EventListener* listener, bool useCapture)
+{
+    m_asyncCallStackTracker.willHandleEvent(eventTarget, eventType, listener, useCapture);
+}
+
 void InspectorDebuggerAgent::didHandleEvent()
 {
+    m_asyncCallStackTracker.didFireAsyncCall();
     cancelPauseOnNextStatement();
 }
 
 void InspectorDebuggerAgent::pause(ErrorString*)
 {
     if (m_javaScriptPauseScheduled)
         return;
     clearBreakDetails();
     scriptDebugServer().setPauseOnNextStatement(true);
     m_javaScriptPauseScheduled = true;
@@ skipping 443 matching lines @@
 {
     m_scripts.clear();
     m_breakpointIdToDebugServerBreakpointIds.clear();
     m_asyncCallStackTracker.clear();
     if (m_frontend)
         m_frontend->globalObjectCleared();
 }
 
 } // namespace WebCore