C++ createScriptCallStack函数代码示例

static void messageHandlerInMainThread(v8::Handle<v8::Message> message, v8::Handle<v8::Value> data)
{
    DOMWindow* firstWindow = firstDOMWindow();
    if (!firstWindow->isCurrentlyDisplayedInFrame())
        return;

    String errorMessage = toWebCoreString(message->Get());

    v8::Handle<v8::StackTrace> stackTrace = message->GetStackTrace();
    RefPtr<ScriptCallStack> callStack;
    // Currently stack trace is only collected when inspector is open.
    if (!stackTrace.IsEmpty() && stackTrace->GetFrameCount() > 0)
        callStack = createScriptCallStack(stackTrace, ScriptCallStack::maxCallStackSizeToCapture);

    v8::Handle<v8::Value> resourceName = message->GetScriptResourceName();
    bool shouldUseDocumentURL = resourceName.IsEmpty() || !resourceName->IsString();
    String resource = shouldUseDocumentURL ? firstWindow->document()->url() : toWebCoreString(resourceName);
    RefPtr<ErrorEvent> event = ErrorEvent::create(errorMessage, resource, message->GetLineNumber(), message->GetStartColumn());

    // messageHandlerInMainThread can be called while we're creating a new context.
    // Since we cannot create a wrapper in the intermediate timing, we need to skip
    // creating a wrapper for |event|.
    DOMWrapperWorld* world = DOMWrapperWorld::current();
    Frame* frame = firstWindow->document()->frame();
    if (world && frame && frame->script()->existingWindowShell(world)) {
        v8::Local<v8::Value> wrappedEvent = toV8(event.get(), v8::Handle<v8::Object>(), v8::Isolate::GetCurrent());
        if (!wrappedEvent.IsEmpty()) {
            ASSERT(wrappedEvent->IsObject());
            v8::Local<v8::Object>::Cast(wrappedEvent)->SetHiddenValue(V8HiddenPropertyName::error(), data);
        }
    }
    AccessControlStatus corsStatus = message->IsSharedCrossOrigin() ? SharableCrossOrigin : NotSharableCrossOrigin;
    firstWindow->document()->reportException(event.release(), callStack, corsStatus);
}

void V8ConsoleMessage::handler(v8::Handle<v8::Message> message, v8::Handle<v8::Value> data)
{
    // Use the frame where JavaScript is called from.
    Frame* frame = V8Proxy::retrieveFrameForEnteredContext();
    if (!frame)
        return;
    Page* page = frame->page();
    if (!page)
        return;

    v8::Handle<v8::String> errorMessageString = message->Get();
    ASSERT(!errorMessageString.IsEmpty());
    String errorMessage = toWebCoreString(errorMessageString);

    v8::Handle<v8::StackTrace> stackTrace = message->GetStackTrace();
    RefPtr<ScriptCallStack> callStack;
    // Currently stack trace is only collected when inspector is open.
    if (!stackTrace.IsEmpty() && stackTrace->GetFrameCount() > 0)
        callStack = createScriptCallStack(stackTrace, ScriptCallStack::maxCallStackSizeToCapture);

    v8::Handle<v8::Value> resourceName = message->GetScriptResourceName();
    bool useURL = resourceName.IsEmpty() || !resourceName->IsString();
    String resourceNameString = useURL ? frame->document()->url() : toWebCoreString(resourceName);
    V8ConsoleMessage consoleMessage(errorMessage, resourceNameString, message->GetLineNumber());
    consoleMessage.dispatchNow(page, callStack);
}

PassRefPtr<Inspector::Protocol::Network::Initiator> InspectorResourceAgent::buildInitiatorObject(Document* document)
{
    RefPtr<ScriptCallStack> stackTrace = createScriptCallStack(JSMainThreadExecState::currentState(), ScriptCallStack::maxCallStackSizeToCapture);
    if (stackTrace && stackTrace->size() > 0) {
        RefPtr<Inspector::Protocol::Network::Initiator> initiatorObject = Inspector::Protocol::Network::Initiator::create()
            .setType(Inspector::Protocol::Network::Initiator::Type::Script);
        initiatorObject->setStackTrace(stackTrace->buildInspectorArray());
        return initiatorObject;
    }

    if (document && document->scriptableDocumentParser()) {
        RefPtr<Inspector::Protocol::Network::Initiator> initiatorObject = Inspector::Protocol::Network::Initiator::create()
            .setType(Inspector::Protocol::Network::Initiator::Type::Parser);
        initiatorObject->setUrl(document->url().string());
        initiatorObject->setLineNumber(document->scriptableDocumentParser()->textPosition().m_line.oneBasedInt());
        return initiatorObject;
    }

    if (m_isRecalculatingStyle && m_styleRecalculationInitiator)
        return m_styleRecalculationInitiator;

    return Inspector::Protocol::Network::Initiator::create()
        .setType(Inspector::Protocol::Network::Initiator::Type::Other)
        .release();
}

PassRefPtr<TypeBuilder::Network::Initiator> InspectorResourceAgent::buildInitiatorObject(Document* document)
{
    RefPtr<ScriptCallStack> stackTrace = createScriptCallStack(ScriptCallStack::maxCallStackSizeToCapture, true);
    if (stackTrace && stackTrace->size() > 0) {
        RefPtr<TypeBuilder::Network::Initiator> initiatorObject = TypeBuilder::Network::Initiator::create()
            .setType(TypeBuilder::Network::Initiator::Type::Script);
        initiatorObject->setStackTrace(stackTrace->buildInspectorArray());
        return initiatorObject;
    }

    if (document && document->scriptableDocumentParser()) {
        RefPtr<TypeBuilder::Network::Initiator> initiatorObject = TypeBuilder::Network::Initiator::create()
            .setType(TypeBuilder::Network::Initiator::Type::Parser);
        initiatorObject->setUrl(document->url().string());
        initiatorObject->setLineNumber(document->scriptableDocumentParser()->lineNumber().oneBasedInt());
        return initiatorObject;
    }

    if (m_isRecalculatingStyle && m_styleRecalculationInitiator)
        return m_styleRecalculationInitiator;

    return TypeBuilder::Network::Initiator::create()
        .setType(TypeBuilder::Network::Initiator::Type::Other)
        .release();
}

static void messageHandlerInMainThread(v8::Handle<v8::Message> message, v8::Handle<v8::Value> data)
{
    ASSERT(isMainThread());
    // It's possible that messageHandlerInMainThread() is invoked while we're initializing a window.
    // In that half-baked situation, we don't have a valid context nor a valid world,
    // so just return immediately.
    if (DOMWrapperWorld::windowIsBeingInitialized())
        return;

    v8::Isolate* isolate = v8::Isolate::GetCurrent();
    // If called during context initialization, there will be no entered window.
    LocalDOMWindow* enteredWindow = enteredDOMWindow(isolate);
    if (!enteredWindow)
        return;

    String errorMessage = toCoreString(message->Get());

    v8::Handle<v8::StackTrace> stackTrace = message->GetStackTrace();
    RefPtr<ScriptCallStack> callStack = nullptr;
    int scriptId = message->GetScriptOrigin().ScriptID()->Value();
    // Currently stack trace is only collected when inspector is open.
    if (!stackTrace.IsEmpty() && stackTrace->GetFrameCount() > 0) {
        callStack = createScriptCallStack(stackTrace, ScriptCallStack::maxCallStackSizeToCapture, isolate);
        bool success = false;
        int topScriptId = callStack->at(0).scriptId().toInt(&success);
        if (success && topScriptId == scriptId)
            scriptId = 0;
    } else {
        Vector<ScriptCallFrame> callFrames;
        callStack = ScriptCallStack::create(callFrames);
    }

    v8::Handle<v8::Value> resourceName = message->GetScriptOrigin().ResourceName();
    bool shouldUseDocumentURL = resourceName.IsEmpty() || !resourceName->IsString();
    String resource = shouldUseDocumentURL ? enteredWindow->document()->url() : toCoreString(resourceName.As<v8::String>());

    ScriptState* scriptState = ScriptState::current(isolate);
    RefPtr<ErrorEvent> event = ErrorEvent::create(errorMessage, resource, message->GetLineNumber(), message->GetStartColumn() + 1, &scriptState->world());
    if (V8DOMWrapper::isDOMWrapper(data)) {
        v8::Handle<v8::Object> obj = v8::Handle<v8::Object>::Cast(data);
        const WrapperTypeInfo* type = toWrapperTypeInfo(obj);
        if (V8DOMException::wrapperTypeInfo.isSubclass(type)) {
            DOMException* exception = V8DOMException::toNative(obj);
            if (exception && !exception->messageForConsole().isEmpty())
                event->setUnsanitizedMessage("Uncaught " + exception->toStringForConsole());
        }
    }

    // This method might be called while we're creating a new context. In this case, we
    // avoid storing the exception object, as we can't create a wrapper during context creation.
    // FIXME: Can we even get here during initialization now that we bail out when GetEntered returns an empty handle?
    LocalFrame* frame = enteredWindow->document()->frame();
    if (frame && frame->script().existingWindowProxy(scriptState->world())) {
        V8ErrorHandler::storeExceptionOnErrorEventWrapper(event.get(), data, scriptState->context()->Global(), isolate);
    }

    enteredWindow->document()->reportException(event.release(), scriptId, callStack);
}

void Console::reportMessageToClient(MessageLevel level, const String& message, PassRefPtr<ScriptCallStack> callStack)
{
    String stackTrace;
    if (m_frame->page()->chrome().client().shouldReportDetailedMessageForSource(callStack->at(0).sourceURL())) {
        RefPtr<ScriptCallStack> fullStack = createScriptCallStack(ScriptCallStack::maxCallStackSizeToCapture);
        stackTrace = PageConsole::formatStackTraceString(message, fullStack);
    }
    m_frame->page()->chrome().client().addMessageToConsole(ConsoleAPIMessageSource, level, message, callStack->at(0).lineNumber(), callStack->at(0).sourceURL(), stackTrace);
}

PassRefPtr<ScriptCallStack> createScriptCallStack(size_t maxStackSize, bool emptyStackIsAllowed)
{
    v8::Isolate* isolate = v8::Isolate::GetCurrent();
    if (!isolate->InContext())
        return nullptr;
    v8::HandleScope handleScope(isolate);
    v8::Handle<v8::StackTrace> stackTrace(v8::StackTrace::CurrentStackTrace(isolate, maxStackSize, stackTraceOptions));
    return createScriptCallStack(stackTrace, maxStackSize, emptyStackIsAllowed, isolate);
}

v8::Handle<v8::Value> V8Console::traceCallback(const v8::Arguments& args)
{
    INC_STATS("DOM.Console.traceCallback");
    Console* imp = V8Console::toNative(args.Holder());
    RefPtr<ScriptCallStack> callStack(createScriptCallStack(ScriptCallStack::maxCallStackSizeToCapture));
    RefPtr<ScriptArguments> scriptArguments(createScriptArguments(args, 0));
    imp->trace(scriptArguments.release(), callStack);
    return v8Undefined();
}

static void internalAddMessage(Page* page, MessageType type, MessageLevel level, JSC::ExecState* state, PassRefPtr<ScriptArguments> prpArguments, bool acceptNoArguments = false, bool printTrace = false)
{
    RefPtr<ScriptArguments> arguments = prpArguments;

    if (!page)
        return;

    if (!acceptNoArguments && !arguments->argumentCount())
        return;

    size_t stackSize = printTrace ? ScriptCallStack::maxCallStackSizeToCapture : 1;
    RefPtr<ScriptCallStack> callStack(createScriptCallStack(state, stackSize));
    const ScriptCallFrame& lastCaller = callStack->at(0);

    String message;
    bool gotMessage = arguments->getFirstArgumentAsString(message);
    InspectorInstrumentation::addMessageToConsole(page, ConsoleAPIMessageSource, type, level, message, state, arguments);

    if (page->settings().privateBrowsingEnabled())
        return;

    if (gotMessage)
        page->chrome().client().addMessageToConsole(ConsoleAPIMessageSource, type, level, message, lastCaller.lineNumber(), lastCaller.columnNumber(), lastCaller.sourceURL());

    if (!page->settings().logsPageMessagesToSystemConsoleEnabled() && !PageConsole::shouldPrintExceptions())
        return;

    PageConsole::printSourceURLAndPosition(lastCaller.sourceURL(), lastCaller.lineNumber());

    printf(": ");

    PageConsole::printMessageSourceAndLevelPrefix(ConsoleAPIMessageSource, level, printTrace);

    for (size_t i = 0; i < arguments->argumentCount(); ++i) {
        String argAsString = arguments->argumentAt(i).toString(arguments->globalState());
        printf(" %s", argAsString.utf8().data());
    }

    printf("\n");

    if (!printTrace)
        return;

    for (size_t i = 0; i < callStack->size(); ++i) {
        const ScriptCallFrame& callFrame = callStack->at(i);

        String functionName = String(callFrame.functionName());
        if (functionName.isEmpty())
            functionName = ASCIILiteral("(unknown)");

        printf("%lu: %s (", static_cast<unsigned long>(i), functionName.utf8().data());

        PageConsole::printSourceURLAndPosition(callFrame.sourceURL(), callFrame.lineNumber());

        printf(")\n");
    }
}

JSValue JSConsole::profileEnd(ExecState* exec)
{
    RefPtr<ScriptCallStack> callStack(createScriptCallStack(exec, 1));
    const String& title = valueToStringWithUndefinedOrNullCheck(exec, exec->argument(0));
    if (exec->hadException())
        return jsUndefined();

    impl()->profileEnd(title, exec, callStack);
    return jsUndefined();
}

PassRefPtr<ScriptCallStack> createScriptCallStackForConsole(JSC::ExecState* exec)
{
    size_t maxStackSize = 1;
    if (InspectorInstrumentation::hasFrontends()) {
        ScriptExecutionContext* scriptExecutionContext = jsCast<JSDOMGlobalObject*>(exec->lexicalGlobalObject())->scriptExecutionContext();
        if (InspectorInstrumentation::consoleAgentEnabled(scriptExecutionContext))
            maxStackSize = ScriptCallStack::maxCallStackSizeToCapture;
    }
    return createScriptCallStack(exec, maxStackSize);
}

PromiseTracker::PromiseData::PromiseData(const ScriptObject& promise, const ScriptObject& parentPromise, const ScriptValue& result, V8PromiseCustom::PromiseState state, double timestamp)
    : m_promise(promise)
    , m_parentPromise(parentPromise)
    , m_result(result)
    , m_state(state)
    , m_timeOnCreate(timestamp)
    , m_timeOnSettle(-1)
    , m_callStackOnCreate(createScriptCallStack(ScriptCallStack::maxCallStackSizeToCapture, true))
{
}

Ref<InspectorObject> TimelineRecordFactory::createGenericRecord(JSC::ExecState* state, double startTime, int maxCallStackDepth) {
    Ref<InspectorObject> record = InspectorObject::create();
    record->setDouble("startTime", startTime);

    if (maxCallStackDepth) {
        RefPtr<ScriptCallStack> stackTrace = createScriptCallStack(state, maxCallStackDepth);
        if (stackTrace && stackTrace->size())
            record->setValue("stackTrace", stackTrace->buildInspectorArray());
    }
    return WTF::move(record);
}

PassRefPtr<InspectorObject> TimelineRecordFactory::createGenericRecord(double startTime, int maxCallStackDepth)
{
    RefPtr<InspectorObject> record = InspectorObject::create();
    record->setDouble("startTime", startTime);

    if (maxCallStackDepth) {
        RefPtr<ScriptCallStack> stackTrace = createScriptCallStack(JSMainThreadExecState::currentState(), maxCallStackDepth);
        if (stackTrace && stackTrace->size())
            record->setValue("stackTrace", stackTrace->buildInspectorArray());
    }
    return record.release();
}

PassRefPtrWillBeRawPtr<ScriptCallStack> createScriptCallStackForConsole(size_t maxStackSize, bool emptyStackIsAllowed)
{
    size_t stackSize = 1;
    if (InspectorInstrumentation::hasFrontends()) {
        v8::Isolate* isolate = v8::Isolate::GetCurrent();
        if (!isolate->InContext())
            return nullptr;
        if (InspectorInstrumentation::consoleAgentEnabled(currentExecutionContext(isolate)))
            stackSize = maxStackSize;
    }
    return createScriptCallStack(stackSize, emptyStackIsAllowed);
}