DevTools: Support asynchronous call stacks on backend.

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 639 matching lines @@
 }
 
 void InspectorDebuggerAgent::cancelPauseOnNextStatement()
 {
     if (m_javaScriptPauseScheduled)
         return;
     clearBreakDetails();
     scriptDebugServer().setPauseOnNextStatement(false);
 }
 
+void InspectorDebuggerAgent::requestAsyncCallFramesIfNeeded()
+{
+    if (m_asyncCallStackTracker.isEnabled())
+        scriptDebugServer().requestAsyncCallFrames();

[yurys, 2013/11/28 09:18:16]

Why do we need this roundtrip into the debug server, it seems that we should be
able to ge current call stack using synchronous call to createScriptCallStack or
its modified version if you need ScriptValues. Also it is not clear whether we
should hold live frame values or just a snapshot.

+}
+
+void InspectorDebuggerAgent::didRequestAsyncCallFrames(ScriptValue callFrames)
+{
+    m_asyncCallStackTracker.didRequestAsyncCallFrames(callFrames);
+}
+
+void InspectorDebuggerAgent::didInstallTimer(ExecutionContext*, int timerId, int timeout, bool singleShot)
+{
+    m_asyncCallStackTracker.didInstallTimer(timerId, singleShot);
+    requestAsyncCallFramesIfNeeded();
+}
+
+void InspectorDebuggerAgent::didRemoveTimer(ExecutionContext*, int timerId)
+{
+    m_asyncCallStackTracker.didRemoveTimer(timerId);
+}
+
+bool InspectorDebuggerAgent::willFireTimer(ExecutionContext*, int timerId)
+{
+    m_asyncCallStackTracker.willFireTimer(timerId);
+    return true;
+}
+
 void InspectorDebuggerAgent::didFireTimer()
 {
+    m_asyncCallStackTracker.didAsyncCall();
     cancelPauseOnNextStatement();
 }
 
+void InspectorDebuggerAgent::didRequestAnimationFrame(Document*, int callbackId)
+{
+    m_asyncCallStackTracker.didRequestAnimationFrame(callbackId);
+    requestAsyncCallFramesIfNeeded();
+}
+
+void InspectorDebuggerAgent::didCancelAnimationFrame(Document*, int callbackId)
+{
+    m_asyncCallStackTracker.didCancelAnimationFrame(callbackId);
+}
+
+bool InspectorDebuggerAgent::willFireAnimationFrame(Document*, int callbackId)
+{
+    m_asyncCallStackTracker.willFireAnimationFrame(callbackId);
+    return true;
+}
+
+void InspectorDebuggerAgent::didFireAnimationFrame()
+{
+    m_asyncCallStackTracker.didAsyncCall();
+}
+
 void InspectorDebuggerAgent::didHandleEvent()
 {
     cancelPauseOnNextStatement();
 }
 
 void InspectorDebuggerAgent::pause(ErrorString*)
 {
     if (m_javaScriptPauseScheduled)
         return;
     clearBreakDetails();
@@ skipping 204 matching lines @@
         compiled = compileSkipCallFramePattern(patternValue);
         if (!compiled) {
             *errorString = "Invalid regular expression";
             return;
         }
     }
     m_state->setString(DebuggerAgentState::skipStackPattern, patternValue);
     m_cachedSkipStackRegExp = compiled.release();
 }
 
+void InspectorDebuggerAgent::setAsyncCallStackDepth(ErrorString*, int depth)
+{
+    m_asyncCallStackTracker.setAsyncCallStackDepth(depth);
+}
+
 void InspectorDebuggerAgent::scriptExecutionBlockedByCSP(const String& directiveText)
 {
     if (scriptDebugServer().pauseOnExceptionsState() != ScriptDebugServer::DontPauseOnExceptions) {
         RefPtr<JSONObject> directive = JSONObject::create();
         directive->setString("directiveText", directiveText);
         breakProgram(InspectorFrontend::Debugger::Reason::CSPViolation, directive.release());
     }
 }
 
 PassRefPtr<Array<CallFrame> > InspectorDebuggerAgent::currentCallFrames()
 {
     if (!m_pausedScriptState)
         return Array<CallFrame>::create();
     InjectedScript injectedScript = m_injectedScriptManager->injectedScriptFor(m_pausedScriptState);
     if (injectedScript.hasNoValue()) {
         ASSERT_NOT_REACHED();
         return Array<CallFrame>::create();
     }
-    return injectedScript.wrapCallFrames(m_currentCallStack);
+    RefPtr<Array<CallFrame> > result = injectedScript.wrapCallFrames(m_currentCallStack);
+    if (!result->length())
+        return result.release();
+    RefPtr<Array<CallFrame> > lastCallFrames = result;
+    AsyncCallStackTracker::AsyncCallStackIterator asyncCallStacks = m_asyncCallStackTracker.currentAsyncCallStack();
+    while (asyncCallStacks.hasNext()) {
+        RefPtr<CallFrame> last = CallFrame::runtimeCast(lastCallFrames->asArray()->get(lastCallFrames->length() - 1));
+        lastCallFrames = injectedScript.wrapCallFrames(asyncCallStacks.next());
+        if (!lastCallFrames->length())
+            break;
+        last->setAsyncCallFrames(lastCallFrames);
+    }
+    return result.release();
 }
 
 String InspectorDebuggerAgent::sourceMapURLForScript(const Script& script)
 {
     bool deprecated;
     String sourceMapURL = ContentSearchUtils::findSourceMapURL(script.source, ContentSearchUtils::JavaScriptMagicComment, &deprecated);
     if (!sourceMapURL.isEmpty()) {
         // FIXME: add deprecated console message here.
         return sourceMapURL;
     }
@@ skipping 64 matching lines @@
     ASSERT(scriptState && !m_pausedScriptState);
     m_pausedScriptState = scriptState;
     m_currentCallStack = callFrames;
 
     m_skipStepInCount = numberOfStepsBeforeStepOut;
 
     if (!exception.hasNoValue()) {
         InjectedScript injectedScript = m_injectedScriptManager->injectedScriptFor(scriptState);
         if (!injectedScript.hasNoValue()) {
             m_breakReason = InspectorFrontend::Debugger::Reason::Exception;
-            m_breakAuxData = injectedScript.wrapObject(exception, "backtrace")->openAccessors();
+            m_breakAuxData = injectedScript.wrapObject(exception, InspectorDebuggerAgent::backtraceObjectGroup)->openAccessors();
             // m_breakAuxData might be null after this.
         }
     }
 
     RefPtr<Array<String> > hitBreakpointIds = Array<String>::create();
 
     for (Vector<String>::const_iterator i = hitBreakpoints.begin(); i != hitBreakpoints.end(); ++i) {
         DebugServerBreakpointToBreakpointIdAndSourceMap::iterator breakpointIterator = m_serverBreakpoints.find(*i);
         if (breakpointIterator != m_serverBreakpoints.end()) {
             const String& localId = breakpointIterator->value.first;
@@ skipping 37 matching lines @@
     m_breakAuxData = data;
     scriptDebugServer().breakProgram();
 }
 
 void InspectorDebuggerAgent::clear()
 {
     m_pausedScriptState = 0;
     m_currentCallStack = ScriptValue();
     m_scripts.clear();
     m_breakpointIdToDebugServerBreakpointIds.clear();
+    m_asyncCallStackTracker.clear();
     m_continueToLocationBreakpointId = String();
     clearBreakDetails();
     m_javaScriptPauseScheduled = false;
     ErrorString error;
     setOverlayMessage(&error, 0);
 }
 
 bool InspectorDebuggerAgent::assertPaused(ErrorString* errorString)
 {
     if (!m_pausedScriptState) {
@@ skipping 18 matching lines @@
 
 void InspectorDebuggerAgent::removeBreakpoint(const String& scriptId, int lineNumber, int columnNumber, BreakpointSource source)
 {
     removeBreakpoint(generateBreakpointId(scriptId, lineNumber, columnNumber, source));
 }
 
 void InspectorDebuggerAgent::reset()
 {
     m_scripts.clear();
     m_breakpointIdToDebugServerBreakpointIds.clear();
+    m_asyncCallStackTracker.clear();
     if (m_frontend)
         m_frontend->globalObjectCleared();
 }
 
 } // namespace WebCore