C++ JSGlobalObject::globalExec方法代码示例

String Database::toJSON() const
{
    JSGlobalObject* globalObject = JSGlobalObject::create(
        m_vm, JSGlobalObject::createStructure(m_vm, jsNull()));
    
    return JSONStringify(globalObject->globalExec(), toJS(globalObject->globalExec()), 0);
}

JSGlobalContextRef JSGlobalContextCreateInGroup(JSContextGroupRef group, JSClassRef globalObjectClass)
{
    initializeThreading();

    RefPtr<VM> vm = group ? PassRefPtr<VM>(toJS(group)) : VM::createContextGroup();

    JSLockHolder locker(vm.get());

    if (!globalObjectClass) {
        JSGlobalObject* globalObject = JSGlobalObject::create(*vm, JSGlobalObject::createStructure(*vm, jsNull()));
#if ENABLE(REMOTE_INSPECTOR)
        if (JSRemoteInspectorGetInspectionEnabledByDefault())
            globalObject->setRemoteDebuggingEnabled(true);
#endif
        return JSGlobalContextRetain(toGlobalRef(globalObject->globalExec()));
    }

    JSGlobalObject* globalObject = JSCallbackObject<JSGlobalObject>::create(*vm, globalObjectClass, JSCallbackObject<JSGlobalObject>::createStructure(*vm, 0, jsNull()));
    ExecState* exec = globalObject->globalExec();
    JSValue prototype = globalObjectClass->prototype(exec);
    if (!prototype)
        prototype = jsNull();
    globalObject->resetPrototype(*vm, prototype);
#if ENABLE(REMOTE_INSPECTOR)
    if (JSRemoteInspectorGetInspectionEnabledByDefault())
        globalObject->setRemoteDebuggingEnabled(true);
#endif
    return JSGlobalContextRetain(toGlobalRef(exec));
}

String Database::toJSON() const
{
    auto scope = DECLARE_THROW_SCOPE(m_vm);
    JSGlobalObject* globalObject = JSGlobalObject::create(
        m_vm, JSGlobalObject::createStructure(m_vm, jsNull()));

    auto value = toJS(globalObject->globalExec());
    RETURN_IF_EXCEPTION(scope, String());
    scope.release();
    return JSONStringify(globalObject->globalExec(), value, 0);
}

JSValue JSC_HOST_CALL functionRun(ExecState* exec, JSObject*, JSValue, const ArgList& args)
{
    StopWatch stopWatch;
    UString fileName = args.at(0).toString(exec);
    Vector<char> script;
    if (!fillBufferWithContentsOfFile(fileName, script))
        return throwError(exec, GeneralError, "Could not open file.");

    JSGlobalObject* globalObject = exec->lexicalGlobalObject();

    stopWatch.start();
    evaluate(globalObject->globalExec(), globalObject->globalScopeChain(), makeSource(script.data(), fileName));
    stopWatch.stop();

    return jsNumber(globalObject->globalExec(), stopWatch.getElapsedMS());
}

JSValueRef JSEvaluateScript(JSContextRef ctx, JSStringRef script, JSObjectRef thisObject, JSStringRef sourceURL, int startingLineNumber, JSValueRef* exception)
{
    ExecState* exec = toJS(ctx);
    exec->globalData().heap.registerThread();
    JSLock lock(exec);

    JSObject* jsThisObject = toJS(thisObject);

    // evaluate sets "this" to the global object if it is NULL
    JSGlobalObject* globalObject = exec->dynamicGlobalObject();
    SourceCode source = makeSource(script->ustring(), sourceURL->ustring(), startingLineNumber);
    Completion completion = evaluate(globalObject->globalExec(), globalObject->globalScopeChain(), source, jsThisObject);

    if (completion.complType() == Throw) {
        if (exception)
            *exception = toRef(completion.value());
        return 0;
    }
    
    if (completion.value())
        return toRef(completion.value());
    
    // happens, for example, when the only statement is an empty (';') statement
    return toRef(jsUndefined());
}

EncodedJSValue doCallToJavaScript(void* executableAddress, ProtoCallFrame* protoCallFrame)
{
    CodeBlock* codeBlock = protoCallFrame->codeBlock();
    JSScope* scope = protoCallFrame->scope();
    JSObject* callee = protoCallFrame->callee();
    int argCountIncludingThis = protoCallFrame->argumentCountIncludingThis();
    int argCount = protoCallFrame->argumentCount();
    JSValue thisValue = protoCallFrame->thisValue();
    JSStack& stack = scope->vm()->interpreter->stack();

    CallFrame* newCallFrame = stack.pushFrame(codeBlock, scope, argCountIncludingThis, callee);
    if (UNLIKELY(!newCallFrame)) {
        JSGlobalObject* globalObject = scope->globalObject();
        ExecState* exec = globalObject->globalExec();
        return JSValue::encode(throwStackOverflowError(exec));
    }

    // Set the arguments for the callee:
    newCallFrame->setThisValue(thisValue);
    for (int i = 0; i < argCount; ++i)
        newCallFrame->setArgument(i, protoCallFrame->argument(i));

    JSValue result = execute(newCallFrame, executableAddress);

    stack.popFrame(newCallFrame);

    return JSValue::encode(result);
}

JSValue* functionRun(ExecState* exec, JSObject*, JSValue*, const ArgList& args)
{
    StopWatch stopWatch;
    UString fileName = args.at(exec, 0)->toString(exec);
    Vector<char> script;
    if (!fillBufferWithContentsOfFile(fileName, script))
        return throwError(exec, GeneralError, "Could not open file.");

    JSGlobalObject* globalObject = exec->dynamicGlobalObject();

    stopWatch.start();
    Interpreter::evaluate(globalObject->globalExec(), globalObject->globalScopeChain(), fileName, 1, script.data());
    stopWatch.stop();

    return jsNumber(globalObject->globalExec(), stopWatch.getElapsedMS());
}

void InspectorHeapAgent::getRemoteObject(ErrorString& errorString, int heapObjectId, const String* optionalObjectGroup, RefPtr<Inspector::Protocol::Runtime::RemoteObject>& result)
{
    // Prevent the cell from getting collected as we look it up.
    VM& vm = m_environment.vm();
    JSLockHolder lock(vm);
    DeferGC deferGC(vm.heap);

    unsigned heapObjectIdentifier = static_cast<unsigned>(heapObjectId);
    const Optional<HeapSnapshotNode> optionalNode = nodeForHeapObjectIdentifier(errorString, heapObjectIdentifier);
    if (!optionalNode)
        return;

    JSCell* cell = optionalNode->cell;
    Structure* structure = cell->structure(m_environment.vm());
    if (!structure) {
        errorString = ASCIILiteral("Unable to get object details");
        return;
    }

    JSGlobalObject* globalObject = structure->globalObject();
    if (!globalObject) {
        errorString = ASCIILiteral("Unable to get object details");
        return;
    }

    InjectedScript injectedScript = m_injectedScriptManager.injectedScriptFor(globalObject->globalExec());
    if (injectedScript.hasNoValue()) {
        errorString = ASCIILiteral("Unable to get object details - InjectedScript");
        return;
    }

    Deprecated::ScriptValue cellScriptValue(m_environment.vm(), JSValue(cell));
    String objectGroup = optionalObjectGroup ? *optionalObjectGroup : String();
    result = injectedScript.wrapObject(cellScriptValue, objectGroup, true);
}

std::error_code parseRuleList(const String& rules, Vector<ContentExtensionRule>& ruleList)
{
#if CONTENT_EXTENSIONS_PERFORMANCE_REPORTING
    double loadExtensionStartTime = monotonicallyIncreasingTime();
#endif
    RefPtr<VM> vm = VM::create();

    JSLockHolder locker(vm.get());
    JSGlobalObject* globalObject = JSGlobalObject::create(*vm, JSGlobalObject::createStructure(*vm, jsNull()));

    ExecState* exec = globalObject->globalExec();
    auto error = loadEncodedRules(*exec, rules, ruleList);

    vm = nullptr;

    if (error)
        return error;

    if (ruleList.isEmpty())
        return ContentExtensionError::JSONContainsNoRules;

#if CONTENT_EXTENSIONS_PERFORMANCE_REPORTING
    double loadExtensionEndTime = monotonicallyIncreasingTime();
    dataLogF("Time spent loading extension %f\n", (loadExtensionEndTime - loadExtensionStartTime));
#endif

    return { };
}

JSValueRef JSEvaluateScriptInternal(const JSLockHolder&, ExecState* exec, JSContextRef ctx, JSObjectRef thisObject, const SourceCode& source, JSValueRef* exception)
{
    UNUSED_PARAM(ctx);

    JSObject* jsThisObject = toJS(thisObject);

    // evaluate sets "this" to the global object if it is NULL
    VM& vm = exec->vm();
    JSGlobalObject* globalObject = vm.vmEntryGlobalObject(exec);
    NakedPtr<Exception> evaluationException;
    JSValue returnValue = profiledEvaluate(globalObject->globalExec(), ProfilingReason::API, source, jsThisObject, evaluationException);

    if (evaluationException) {
        if (exception)
            *exception = toRef(exec, evaluationException->value());
#if ENABLE(REMOTE_INSPECTOR)
        // FIXME: If we have a debugger attached we could learn about ParseError exceptions through
        // ScriptDebugServer::sourceParsed and this path could produce a duplicate warning. The
        // Debugger path is currently ignored by inspector.
        // NOTE: If we don't have a debugger, this SourceCode will be forever lost to the inspector.
        // We could stash it in the inspector in case an inspector is ever opened.
        globalObject->inspectorController().reportAPIException(exec, evaluationException);
#endif
        return nullptr;
    }

    if (returnValue)
        return toRef(exec, returnValue);

    // happens, for example, when the only statement is an empty (';') statement
    return toRef(exec, jsUndefined());
}

JSValueRef JSEvaluateScript(JSContextRef ctx, JSStringRef script, JSObjectRef thisObject, JSStringRef sourceURL, int startingLineNumber, JSValueRef* exception)
{
    if (!ctx) {
        ASSERT_NOT_REACHED();
        return 0;
    }
    ExecState* exec = toJS(ctx);
    APIEntryShim entryShim(exec);

    JSObject* jsThisObject = toJS(thisObject);

    // evaluate sets "this" to the global object if it is NULL
    JSGlobalObject* globalObject = exec->dynamicGlobalObject();
    SourceCode source = makeSource(script->string(), sourceURL->string(), TextPosition(OrdinalNumber::fromOneBasedInt(startingLineNumber), OrdinalNumber::first()));

    JSValue evaluationException;
    JSValue returnValue = evaluate(globalObject->globalExec(), source, jsThisObject, &evaluationException);

    if (evaluationException) {
        if (exception)
            *exception = toRef(exec, evaluationException);
        return 0;
    }

    if (returnValue)
        return toRef(exec, returnValue);

    // happens, for example, when the only statement is an empty (';') statement
    return toRef(exec, jsUndefined());
}

bool JSCustomSQLStatementErrorCallback::handleEvent(SQLTransaction* transaction, SQLError* error)
{
    ASSERT(m_callback);
    ASSERT(m_frame);
        
    if (!m_frame->script()->isEnabled())
        return true;
        
    JSGlobalObject* globalObject = m_frame->script()->globalObject();
    ExecState* exec = globalObject->globalExec();
        
    KJS::JSLock lock;
        
    JSValue* handleEventFunction = m_callback->get(exec, Identifier(exec, "handleEvent"));
    CallData handleEventCallData;
    CallType handleEventCallType = handleEventFunction->getCallData(handleEventCallData);
    CallData callbackCallData;
    CallType callbackCallType = CallTypeNone;

    if (handleEventCallType == CallTypeNone) {
        callbackCallType = m_callback->getCallData(callbackCallData);
        if (callbackCallType == CallTypeNone) {
            // FIXME: Should an exception be thrown here?
            return true;
        }
    }
        
    RefPtr<JSCustomSQLStatementErrorCallback> protect(this);
        
    ArgList args;
    args.append(toJS(exec, transaction));
    args.append(toJS(exec, error));
        
    JSValue* result;
    globalObject->startTimeoutCheck();
    if (handleEventCallType != CallTypeNone)
        result = call(exec, handleEventFunction, handleEventCallType, handleEventCallData, m_callback, args);
    else
        result = call(exec, m_callback, callbackCallType, callbackCallData, m_callback, args);
    globalObject->stopTimeoutCheck();
        
    if (exec->hadException()) {
        JSObject* exception = exec->exception()->toObject(exec);
        String message = exception->get(exec, exec->propertyNames().message)->toString(exec);
        int lineNumber = exception->get(exec, Identifier(exec, "line"))->toInt32(exec);
        String sourceURL = exception->get(exec, Identifier(exec, "sourceURL"))->toString(exec);
        m_frame->domWindow()->console()->addMessage(JSMessageSource, ErrorMessageLevel, message, lineNumber, sourceURL);
        exec->clearException();
            
        // The spec says:
        // "If the error callback returns false, then move on to the next statement..."
        // "Otherwise, the error callback did not return false, or there was no error callback"
        // Therefore an exception and returning true are the same thing - so, return true on an exception
        return true;
    }
        
    Document::updateDocumentsRendering();

    return result->toBoolean(exec);
}

ExecState* NPRuntimeObjectMap::globalExec() const
{
    JSGlobalObject* globalObject = this->globalObject();
    if (!globalObject)
        return 0;
    
    return globalObject->globalExec();
}

JSGlobalContextRef JSGlobalContextCreate(JSClassRef globalObjectClass)
{
    initializeThreading();
#if OS(DARWIN)
    // When running on Tiger or Leopard, or if the application was linked before JSGlobalContextCreate was changed
    // to use a unique JSGlobalData, we use a shared one for compatibility.
#ifndef BUILDING_ON_LEOPARD
    if (NSVersionOfLinkTimeLibrary("JavaScriptCore") <= webkitFirstVersionWithConcurrentGlobalContexts) {
#else
    {
#endif
        JSLock lock(LockForReal);
        return JSGlobalContextCreateInGroup(toRef(&JSGlobalData::sharedInstance()), globalObjectClass);
    }
#endif // OS(DARWIN)

    return JSGlobalContextCreateInGroup(0, globalObjectClass);
}

JSGlobalContextRef JSGlobalContextCreateInGroup(JSContextGroupRef group, JSClassRef globalObjectClass)
{
    initializeThreading();

    JSLock lock(LockForReal);
    RefPtr<JSGlobalData> globalData = group ? PassRefPtr<JSGlobalData>(toJS(group)) : JSGlobalData::createContextGroup(ThreadStackTypeSmall);

    APIEntryShim entryShim(globalData.get(), false);

#if ENABLE(JSC_MULTIPLE_THREADS)
    globalData->makeUsableFromMultipleThreads();
#endif

    if (!globalObjectClass) {
        JSGlobalObject* globalObject = JSGlobalObject::create(*globalData, JSGlobalObject::createStructure(*globalData, jsNull()));
        return JSGlobalContextRetain(toGlobalRef(globalObject->globalExec()));
    }

    JSGlobalObject* globalObject = JSCallbackObject<JSGlobalObject>::create(*globalData, globalObjectClass, JSCallbackObject<JSGlobalObject>::createStructure(*globalData, 0, jsNull()));
    ExecState* exec = globalObject->globalExec();
    JSValue prototype = globalObjectClass->prototype(exec);
    if (!prototype)
        prototype = jsNull();
    globalObject->resetPrototype(*globalData, prototype);
    return JSGlobalContextRetain(toGlobalRef(exec));
}

double InspectorScriptProfilerAgent::willEvaluateScript(JSGlobalObject& globalObject)
{
    m_activeEvaluateScript = true;

    if (m_enableLegacyProfiler)
        LegacyProfiler::profiler()->startProfiling(globalObject.globalExec(), ASCIILiteral("ScriptProfiler"), m_environment.executionStopwatch());

    return m_environment.executionStopwatch()->elapsedTime();
}