C++ TRACE_DISABLED_BY_DEFAULT函数代码示例

ScriptValue InjectedScriptBase::callFunctionWithEvalEnabled(ScriptFunctionCall& function, bool& hadException) const
{
    ASSERT(!isEmpty());
    ExecutionContext* executionContext = m_injectedScriptObject.scriptState()->executionContext();
    ScriptState::Scope scope(m_injectedScriptObject.scriptState());
    v8::Local<v8::Function> functionObj = function.function();
    DevToolsFunctionInfo info(functionObj);
    TRACE_EVENT1(TRACE_DISABLED_BY_DEFAULT("devtools.timeline"), "FunctionCall", "data", InspectorFunctionCallEvent::data(executionContext, info.scriptId(), "InjectedScriptSource.js", info.lineNumber()));
    InspectorInstrumentationCookie cookie = InspectorInstrumentation::willCallFunction(executionContext, info);

    ScriptState* scriptState = m_injectedScriptObject.scriptState();
    bool evalIsDisabled = false;
    if (scriptState) {
        evalIsDisabled = !scriptState->evalEnabled();
        // Temporarily enable allow evals for inspector.
        if (evalIsDisabled)
            scriptState->setEvalEnabled(true);
    }

    ScriptValue resultValue = function.call(hadException);

    if (evalIsDisabled)
        scriptState->setEvalEnabled(false);

    InspectorInstrumentation::didCallFunction(cookie);
    TRACE_EVENT_INSTANT1(TRACE_DISABLED_BY_DEFAULT("devtools.timeline"), "UpdateCounters", TRACE_EVENT_SCOPE_THREAD, "data", InspectorUpdateCountersEvent::data());
    return resultValue;
}

void V8GCController::gcEpilogue(v8::GCType type, v8::GCCallbackFlags flags)
{
    // FIXME: It would be nice if the GC callbacks passed the Isolate directly....
    v8::Isolate* isolate = v8::Isolate::GetCurrent();
    if (type == v8::kGCTypeScavenge)
        minorGCEpilogue(isolate);
    else if (type == v8::kGCTypeMarkSweepCompact)
        majorGCEpilogue(isolate);

    // Forces a Blink heap garbage collection when a garbage collection
    // was forced from V8. This is used for tests that force GCs from
    // JavaScript to verify that objects die when expected.
    if (flags & v8::kGCCallbackFlagForced) {
        // This single GC is not enough for two reasons:
        //   (1) The GC is not precise because the GC scans on-stack pointers conservatively.
        //   (2) One GC is not enough to break a chain of persistent handles. It's possible that
        //       some heap allocated objects own objects that contain persistent handles
        //       pointing to other heap allocated objects. To break the chain, we need multiple GCs.
        //
        // Regarding (1), we force a precise GC at the end of the current event loop. So if you want
        // to collect all garbage, you need to wait until the next event loop.
        // Regarding (2), it would be OK in practice to trigger only one GC per gcEpilogue, because
        // GCController.collectAll() forces 7 V8's GC.
        Heap::collectGarbage(ThreadState::HeapPointersOnStack, ThreadState::ForcedGC);

        // Forces a precise GC at the end of the current event loop.
        Heap::setForcePreciseGCForTesting();
    }

    TRACE_EVENT_END1(TRACE_DISABLED_BY_DEFAULT("devtools.timeline"), "GCEvent", "usedHeapSizeAfter", usedHeapSize(isolate));
    TRACE_EVENT_INSTANT1(TRACE_DISABLED_BY_DEFAULT("devtools.timeline"), "UpdateCounters", "data", InspectorUpdateCountersEvent::data());
}

void ScriptedAnimationController::executeCallbacks(double monotonicTimeNow)
{
    // dispatchEvents() runs script which can cause the document to be destroyed.
    if (!m_document)
        return;

    double highResNowMs = 1000.0 * m_document->loader()->timing()->monotonicTimeToZeroBasedDocumentTime(monotonicTimeNow);
    double legacyHighResNowMs = 1000.0 * m_document->loader()->timing()->monotonicTimeToPseudoWallTime(monotonicTimeNow);

    // First, generate a list of callbacks to consider.  Callbacks registered from this point
    // on are considered only for the "next" frame, not this one.
    ASSERT(m_callbacksToInvoke.isEmpty());
    m_callbacksToInvoke.swap(m_callbacks);

    for (size_t i = 0; i < m_callbacksToInvoke.size(); ++i) {
        RequestAnimationFrameCallback* callback = m_callbacksToInvoke[i].get();
        if (!callback->m_cancelled) {
            TRACE_EVENT1(TRACE_DISABLED_BY_DEFAULT("devtools.timeline"), "FireAnimationFrame", "data", InspectorAnimationFrameEvent::data(m_document, callback->m_id));
            // FIXME(361045): remove InspectorInstrumentation calls once DevTools Timeline migrates to tracing.
            InspectorInstrumentationCookie cookie = InspectorInstrumentation::willFireAnimationFrame(m_document, callback->m_id);
            if (callback->m_useLegacyTimeBase)
                callback->handleEvent(legacyHighResNowMs);
            else
                callback->handleEvent(highResNowMs);
            InspectorInstrumentation::didFireAnimationFrame(cookie);
            TRACE_EVENT_INSTANT1(TRACE_DISABLED_BY_DEFAULT("devtools.timeline"), "UpdateCounters", "data", InspectorUpdateCountersEvent::data());
        }
    }

    m_callbacksToInvoke.clear();
}

ScriptValue InjectedScriptBase::callFunctionWithEvalEnabled(ScriptFunctionCall& function, bool& hadException) const
{
    ASSERT(!isEmpty());
    ExecutionContext* executionContext = m_injectedScriptObject.scriptState()->executionContext();
    TRACE_EVENT1(TRACE_DISABLED_BY_DEFAULT("devtools.timeline"), "FunctionCall", "data", InspectorFunctionCallEvent::data(executionContext, 0, name(), 1));
    // FIXME(361045): remove InspectorInstrumentation calls once DevTools Timeline migrates to tracing.
    InspectorInstrumentationCookie cookie = InspectorInstrumentation::willCallFunction(executionContext, 0, name(), 1);

    ScriptState* scriptState = m_injectedScriptObject.scriptState();
    bool evalIsDisabled = false;
    if (scriptState) {
        evalIsDisabled = !scriptState->evalEnabled();
        // Temporarily enable allow evals for inspector.
        if (evalIsDisabled)
            scriptState->setEvalEnabled(true);
    }

    ScriptValue resultValue = function.call(hadException);

    if (evalIsDisabled)
        scriptState->setEvalEnabled(false);

    InspectorInstrumentation::didCallFunction(cookie);
    TRACE_EVENT_INSTANT1(TRACE_DISABLED_BY_DEFAULT("devtools.timeline"), "UpdateCounters", "data", InspectorUpdateCountersEvent::data());
    return resultValue;
}

v8::Local<v8::Value> ScriptController::executeScriptAndReturnValue(v8::Handle<v8::Context> context, const ScriptSourceCode& source, AccessControlStatus corsStatus)
{
    TRACE_EVENT1(TRACE_DISABLED_BY_DEFAULT("devtools.timeline"), "EvaluateScript", "data", InspectorEvaluateScriptEvent::data(m_frame, source.url().string(), source.startLine()));
    TRACE_EVENT_INSTANT1(TRACE_DISABLED_BY_DEFAULT("devtools.timeline.stack"), "CallStack", "stack", InspectorCallStackEvent::currentCallStack());
    // FIXME(361045): remove InspectorInstrumentation calls once DevTools Timeline migrates to tracing.
    InspectorInstrumentationCookie cookie = InspectorInstrumentation::willEvaluateScript(m_frame, source.url().string(), source.startLine());

    v8::Local<v8::Value> result;
    {
        // Isolate exceptions that occur when compiling and executing
        // the code. These exceptions should not interfere with
        // javascript code we might evaluate from C++ when returning
        // from here.
        v8::TryCatch tryCatch;
        tryCatch.SetVerbose(true);

        v8::Handle<v8::Script> script = V8ScriptRunner::compileScript(source, m_isolate, corsStatus);

        // Keep LocalFrame (and therefore ScriptController) alive.
        RefPtr<LocalFrame> protect(m_frame);
        result = V8ScriptRunner::runCompiledScript(script, m_frame->document(), m_isolate);
        ASSERT(!tryCatch.HasCaught() || result.IsEmpty());
    }

    InspectorInstrumentation::didEvaluateScript(cookie);
    TRACE_EVENT_INSTANT1(TRACE_DISABLED_BY_DEFAULT("devtools.timeline"), "UpdateCounters", "data", InspectorUpdateCountersEvent::data());

    return result;
}

v8::Local<v8::Value> ScriptController::executeScriptAndReturnValue(v8::Handle<v8::Context> context, const ScriptSourceCode& source, AccessControlStatus corsStatus, double* compilationFinishTime)
{
    TRACE_EVENT1(TRACE_DISABLED_BY_DEFAULT("devtools.timeline"), "EvaluateScript", "data", InspectorEvaluateScriptEvent::data(frame(), source.url().string(), source.startLine()));
    // FIXME(361045): remove InspectorInstrumentation calls once DevTools Timeline migrates to tracing.
    InspectorInstrumentationCookie cookie = InspectorInstrumentation::willEvaluateScript(frame(), source.url().string(), source.startLine());

    v8::Local<v8::Value> result;
    {
        V8CacheOptions v8CacheOptions(V8CacheOptionsDefault);
        if (frame()->settings())
            v8CacheOptions = frame()->settings()->v8CacheOptions();

        // Isolate exceptions that occur when compiling and executing
        // the code. These exceptions should not interfere with
        // javascript code we might evaluate from C++ when returning
        // from here.
        v8::TryCatch tryCatch;
        tryCatch.SetVerbose(true);

        v8::Handle<v8::Script> script = V8ScriptRunner::compileScript(source, isolate(), corsStatus, v8CacheOptions);

        if (compilationFinishTime) {
            *compilationFinishTime = WTF::monotonicallyIncreasingTime();
        }
        // Keep LocalFrame (and therefore ScriptController) alive.
        RefPtrWillBeRawPtr<LocalFrame> protect(frame());
        result = V8ScriptRunner::runCompiledScript(isolate(), script, frame()->document());
        ASSERT(!tryCatch.HasCaught() || result.IsEmpty());
    }

    InspectorInstrumentation::didEvaluateScript(cookie);
    TRACE_EVENT_INSTANT1(TRACE_DISABLED_BY_DEFAULT("devtools.timeline"), "UpdateCounters", "data", InspectorUpdateCountersEvent::data());

    return result;
}

bool EventDispatcher::dispatch()
{
    TRACE_EVENT0("webkit", "EventDispatcher::dispatch");

#ifndef NDEBUG
    ASSERT(!m_eventDispatched);
    m_eventDispatched = true;
#endif
    ChildNodesLazySnapshot::takeChildNodesLazySnapshot();

    m_event->setTarget(EventPath::eventTargetRespectingTargetRules(m_node.get()));
    ASSERT(!NoEventDispatchAssertion::isEventDispatchForbidden());
    ASSERT(m_event->target());
    WindowEventContext windowEventContext(m_event.get(), m_node.get(), topNodeEventContext());
    TRACE_EVENT1(TRACE_DISABLED_BY_DEFAULT("devtools.timeline"), "EventDispatch", "type", m_event->type().ascii());
    // FIXME(361045): remove InspectorInstrumentation calls once DevTools Timeline migrates to tracing.
    InspectorInstrumentationCookie cookie = InspectorInstrumentation::willDispatchEvent(&m_node->document(), *m_event, windowEventContext.window(), m_node.get(), m_event->eventPath());

    void* preDispatchEventHandlerResult;
    if (dispatchEventPreProcess(preDispatchEventHandlerResult) == ContinueDispatching)
        if (dispatchEventAtCapturing(windowEventContext) == ContinueDispatching)
            if (dispatchEventAtTarget() == ContinueDispatching)
                dispatchEventAtBubbling(windowEventContext);
    dispatchEventPostProcess(preDispatchEventHandlerResult);

    // Ensure that after event dispatch, the event's target object is the
    // outermost shadow DOM boundary.
    m_event->setTarget(windowEventContext.target());
    m_event->setCurrentTarget(0);
    InspectorInstrumentation::didDispatchEvent(cookie);
    TRACE_EVENT_INSTANT1(TRACE_DISABLED_BY_DEFAULT("devtools.timeline"), "UpdateCounters", "data", InspectorUpdateCountersEvent::data());

    return !m_event->defaultPrevented();
}

DispatchEventResult EventDispatcher::dispatch()
{
    TRACE_EVENT0(TRACE_DISABLED_BY_DEFAULT("blink.debug"), "EventDispatcher::dispatch");

#if ENABLE(ASSERT)
    ASSERT(!m_eventDispatched);
    m_eventDispatched = true;
#endif
    if (event().eventPath().isEmpty()) {
        // eventPath() can be empty if event path is shrinked by relataedTarget retargeting.
        return DispatchEventResult::NotCanceled;
    }
    m_event->eventPath().ensureWindowEventContext();

    m_event->setTarget(EventPath::eventTargetRespectingTargetRules(*m_node));
    ASSERT(!EventDispatchForbiddenScope::isEventDispatchForbidden());
    ASSERT(m_event->target());
    TRACE_EVENT1("devtools.timeline", "EventDispatch", "data", InspectorEventDispatchEvent::data(*m_event));
    void* preDispatchEventHandlerResult;
    if (dispatchEventPreProcess(preDispatchEventHandlerResult) == ContinueDispatching) {
        if (dispatchEventAtCapturing() == ContinueDispatching) {
            if (dispatchEventAtTarget() == ContinueDispatching)
                dispatchEventAtBubbling();
        }
    }
    dispatchEventPostProcess(preDispatchEventHandlerResult);

    // Ensure that after event dispatch, the event's target object is the
    // outermost shadow DOM boundary.
    m_event->setTarget(m_event->eventPath().windowEventContext().target());
    m_event->setCurrentTarget(nullptr);
    TRACE_EVENT_INSTANT1(TRACE_DISABLED_BY_DEFAULT("devtools.timeline"), "UpdateCounters", TRACE_EVENT_SCOPE_THREAD, "data", InspectorUpdateCountersEvent::data());

    return EventTarget::dispatchEventResult(*m_event);
}

void MainThreadWebSocketChannel::didCloseSocketStream(SocketStreamHandle* handle)
{
    WTF_LOG(Network, "MainThreadWebSocketChannel %p didCloseSocketStream()", this);
    if (m_identifier && m_document) {
        TRACE_EVENT_INSTANT1(TRACE_DISABLED_BY_DEFAULT("devtools.timeline"), "WebSocketDestroy", "data", InspectorWebSocketEvent::data(m_document, m_identifier));
        TRACE_EVENT_INSTANT1(TRACE_DISABLED_BY_DEFAULT("devtools.timeline.stack"), "CallStack", "stack", InspectorCallStackEvent::currentCallStack());
        // FIXME(361045): remove InspectorInstrumentation calls once DevTools Timeline migrates to tracing.
        InspectorInstrumentation::didCloseWebSocket(m_document, m_identifier);
    }
    ASSERT_UNUSED(handle, handle == m_handle || !m_handle);

    // Show error message on JS console if this is unexpected connection close
    // during opening handshake.
    if (!m_hasCalledDisconnectOnHandle && m_handshake->mode() == WebSocketHandshake::Incomplete && m_document) {
        const String message = "WebSocket connection to '" + m_handshake->url().elidedString() + "' failed: Connection closed before receiving a handshake response";
        m_document->addConsoleMessage(ConsoleMessage::create(JSMessageSource, ErrorMessageLevel, message, m_sourceURLAtConstruction, m_lineNumberAtConstruction));
    }

    m_state = ChannelClosed;
    if (m_closingTimer.isActive())
        m_closingTimer.stop();
    if (m_outgoingFrameQueueStatus != OutgoingFrameQueueClosed)
        abortOutgoingFrameQueue();
    if (m_handle) {
        WebSocketChannelClient* client = m_client;
        m_client = nullptr;
        clearDocument();
        m_handle = nullptr;
        if (client)
            client->didClose(m_receivedClosingHandshake ? WebSocketChannelClient::ClosingHandshakeComplete : WebSocketChannelClient::ClosingHandshakeIncomplete, m_closeEventCode, m_closeEventReason);
    }
    deref();
}

v8::Local<v8::Value> V8WorkerGlobalScopeEventListener::callListenerFunction(v8::Handle<v8::Value> jsEvent, Event* event)
{
    v8::Local<v8::Function> handlerFunction = getListenerFunction(scriptState()->executionContext());
    v8::Local<v8::Object> receiver = getReceiverObject(event);
    if (handlerFunction.IsEmpty() || receiver.IsEmpty())
        return v8::Local<v8::Value>();

    TRACE_EVENT1(TRACE_DISABLED_BY_DEFAULT("devtools.timeline"), "FunctionCall", "data", devToolsTraceEventData(scriptState()->executionContext(), handlerFunction, isolate()));
    TRACE_EVENT_INSTANT1(TRACE_DISABLED_BY_DEFAULT("devtools.timeline.stack"), "CallStack", "stack", InspectorCallStackEvent::currentCallStack());
    // FIXME(361045): remove InspectorInstrumentation calls once DevTools Timeline migrates to tracing.
    InspectorInstrumentationCookie cookie;
    if (InspectorInstrumentation::timelineAgentEnabled(scriptState()->executionContext())) {
        int scriptId = 0;
        String resourceName;
        int lineNumber = 1;
        GetDevToolsFunctionInfo(handlerFunction, isolate(), scriptId, resourceName, lineNumber);
        cookie = InspectorInstrumentation::willCallFunction(scriptState()->executionContext(), scriptId, resourceName, lineNumber);
    }

    v8::Handle<v8::Value> parameters[1] = { jsEvent };
    v8::Local<v8::Value> result = V8ScriptRunner::callFunction(handlerFunction, scriptState()->executionContext(), receiver, WTF_ARRAY_LENGTH(parameters), parameters, isolate());

    InspectorInstrumentation::didCallFunction(cookie);
    TRACE_EVENT_INSTANT1(TRACE_DISABLED_BY_DEFAULT("devtools.timeline"), "UpdateCounters", "data", InspectorUpdateCountersEvent::data());

    return result;
}

void ImageDecodingStore::removeFromCacheInternal(
    const T* cacheEntry,
    U* cacheMap,
    V* identifierMap,
    Vector<std::unique_ptr<CacheEntry>>* deletionList) {
  const size_t cacheEntryBytes = cacheEntry->memoryUsageInBytes();
  ASSERT(m_heapMemoryUsageInBytes >= cacheEntryBytes);
  m_heapMemoryUsageInBytes -= cacheEntryBytes;

  // Remove entry from identifier map.
  typename V::iterator iter = identifierMap->find(cacheEntry->generator());
  ASSERT(iter != identifierMap->end());
  iter->value.remove(cacheEntry->cacheKey());
  if (!iter->value.size())
    identifierMap->remove(iter);

  // Remove entry from cache map.
  deletionList->append(cacheMap->take(cacheEntry->cacheKey()));

  TRACE_COUNTER1(TRACE_DISABLED_BY_DEFAULT("blink.image_decoding"),
                 "ImageDecodingStoreHeapMemoryUsageBytes",
                 m_heapMemoryUsageInBytes);
  TRACE_COUNTER1(TRACE_DISABLED_BY_DEFAULT("blink.image_decoding"),
                 "ImageDecodingStoreNumOfDecoders", m_decoderCacheMap.size());
}

void DOMTimer::removeByID(ExecutionContext* context, int timeoutID)
{
    context->removeTimeoutByID(timeoutID);
    TRACE_EVENT_INSTANT1(TRACE_DISABLED_BY_DEFAULT("devtools.timeline"), "TimerRemove", "data", InspectorTimerRemoveEvent::data(context, timeoutID));
    TRACE_EVENT_INSTANT1(TRACE_DISABLED_BY_DEFAULT("devtools.timeline.stack"), "CallStack", "stack", InspectorCallStackEvent::currentCallStack());
    // FIXME(361045): remove InspectorInstrumentation calls once DevTools Timeline migrates to tracing.
    InspectorInstrumentation::didRemoveTimer(context, timeoutID);
}

void FrameFetchContext::dispatchWillSendRequest(DocumentLoader* loader, unsigned long identifier, ResourceRequest& request, const ResourceResponse& redirectResponse, const FetchInitiatorInfo& initiatorInfo)
{
    m_frame->loader().applyUserAgent(request);
    m_frame->loader().client()->dispatchWillSendRequest(loader, identifier, request, redirectResponse);
    TRACE_EVENT_INSTANT1(TRACE_DISABLED_BY_DEFAULT("devtools.timeline"), "ResourceSendRequest", "data", InspectorSendRequestEvent::data(identifier, m_frame, request));
    TRACE_EVENT_INSTANT1(TRACE_DISABLED_BY_DEFAULT("devtools.timeline.stack"), "CallStack", "stack", InspectorCallStackEvent::currentCallStack());
    // FIXME(361045): remove InspectorInstrumentation calls once DevTools Timeline migrates to tracing.
    InspectorInstrumentation::willSendRequest(m_frame, identifier, ensureLoader(loader), request, redirectResponse, initiatorInfo);
}

ScriptedAnimationController::CallbackId ScriptedAnimationController::registerCallback(PassOwnPtr<RequestAnimationFrameCallback> callback)
{
    ScriptedAnimationController::CallbackId id = ++m_nextCallbackId;
    WTF_LOG(ScriptedAnimationController, "registerCallback: id = %d", id);
    callback->m_cancelled = false;
    callback->m_id = id;
    m_callbacks.append(callback);
    scheduleAnimationIfNeeded();

    TRACE_EVENT_INSTANT1(TRACE_DISABLED_BY_DEFAULT("devtools.timeline"), "RequestAnimationFrame", TRACE_EVENT_SCOPE_PROCESS, "data", InspectorAnimationFrameEvent::data(m_document, id));
    TRACE_EVENT_INSTANT1(TRACE_DISABLED_BY_DEFAULT("devtools.timeline.stack"), "CallStack", TRACE_EVENT_SCOPE_PROCESS, "stack", InspectorCallStackEvent::currentCallStack());

    return id;
}

ScriptedAnimationController::CallbackId ScriptedAnimationController::registerCallback(PassOwnPtr<RequestAnimationFrameCallback> callback)
{
    ScriptedAnimationController::CallbackId id = ++m_nextCallbackId;
    callback->m_cancelled = false;
    callback->m_id = id;
    m_callbacks.append(callback);
    scheduleAnimationIfNeeded();

    TRACE_EVENT_INSTANT1(TRACE_DISABLED_BY_DEFAULT("devtools.timeline"), "RequestAnimationFrame", "data", InspectorAnimationFrameEvent::data(m_document, id));
    TRACE_EVENT_INSTANT1(TRACE_DISABLED_BY_DEFAULT("devtools.timeline.stack"), "CallStack", "stack", InspectorCallStackEvent::currentCallStack());
    // FIXME(361045): remove InspectorInstrumentation calls once DevTools Timeline migrates to tracing.
    InspectorInstrumentation::didRequestAnimationFrame(m_document, id);

    return id;
}