WebKit/Source/WebCore/workers/WorkerThread.cpp at main · WebKit/WebKit · GitHub

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* 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.

* 2. Redistributions in binary form must reproduce the above copyright

* notice, this list of conditions and the following disclaimer in the

* documentation and/or other materials provided with the distribution.

* THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY

* EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR

* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR

* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,

* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,

* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR

* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY

* OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT

* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE

* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

#include "config.h"

#include "WorkerThread.h"

#include "AdvancedPrivacyProtections.h"

#include "IDBConnectionProxy.h"

#include "JSDOMExceptionHandling.h"

#include "JSDOMGlobalObject.h"

#include "ScriptSourceCode.h"

#include "SecurityOrigin.h"

#include "SocketProvider.h"

#include "WorkerBadgeProxy.h"

#include "WorkerDebuggerProxy.h"

#include "WorkerGlobalScope.h"

#include "WorkerLoaderProxy.h"

#include "WorkerReportingProxy.h"

#include "WorkerScriptFetcher.h"

#include <JavaScriptCore/ScriptCallStack.h>

#include <wtf/SetForScope.h>

#include <wtf/TZoneMallocInlines.h>

#include <wtf/Threading.h>

namespace WebCore {

static std::atomic<unsigned> workerThreadCounter { 0 };

unsigned WorkerThread::workerThreadCount()

{

return workerThreadCounter;

}

WorkerParameters WorkerParameters::isolatedCopy() const

{

return {

scriptURL.isolatedCopy(),

ownerURL.isolatedCopy(),

name.isolatedCopy(),

inspectorIdentifier.isolatedCopy(),

userAgent.isolatedCopy(),

isOnline,

contentSecurityPolicyResponseHeaders.isolatedCopy(),

shouldBypassMainWorldContentSecurityPolicy,

crossOriginEmbedderPolicy.isolatedCopy(),

timeOrigin,

referrerPolicy,

workerType,

credentials,

settingsValues.isolatedCopy(),

workerThreadMode,

sessionID,

crossThreadCopy(serviceWorkerData),

clientIdentifier,

advancedPrivacyProtections,

noiseInjectionHashSalt,

agentClusterID.isolatedCopy()

};

}

struct WorkerThreadStartupData {

WTF_MAKE_TZONE_ALLOCATED_INLINE(WorkerThreadStartupData);

WTF_MAKE_NONCOPYABLE(WorkerThreadStartupData);

public:

WorkerThreadStartupData(const WorkerParameters& params, const ScriptBuffer& sourceCode, WorkerThreadStartMode, const SecurityOrigin& topOrigin);

WorkerParameters params;

Ref<SecurityOrigin> origin;

ScriptBuffer sourceCode;

WorkerThreadStartMode startMode;

Ref<SecurityOrigin> topOrigin;

};

WorkerThreadStartupData::WorkerThreadStartupData(const WorkerParameters& other, const ScriptBuffer& sourceCode, WorkerThreadStartMode startMode, const SecurityOrigin& topOrigin)

: params(other.isolatedCopy())

, origin(SecurityOrigin::create(other.scriptURL)->isolatedCopy())

, sourceCode(sourceCode.isolatedCopy())

, startMode(startMode)

, topOrigin(topOrigin.isolatedCopy())

{

}

WorkerThread::WorkerThread(const WorkerParameters& params, const ScriptBuffer& sourceCode, WorkerLoaderProxy& workerLoaderProxy, WorkerDebuggerProxy& workerDebuggerProxy, WorkerReportingProxy& workerReportingProxy, WorkerBadgeProxy& badgeProxy, WorkerThreadStartMode startMode, const SecurityOrigin& topOrigin, IDBClient::IDBConnectionProxy* connectionProxy, SocketProvider* socketProvider, JSC::RuntimeFlags runtimeFlags)

: WorkerOrWorkletThread(params.inspectorIdentifier.isolatedCopy(), params.workerThreadMode)

, m_workerLoaderProxy(&workerLoaderProxy)

, m_workerDebuggerProxy(&workerDebuggerProxy)

, m_workerReportingProxy(&workerReportingProxy)

, m_workerBadgeProxy(&badgeProxy)

, m_runtimeFlags(runtimeFlags)

, m_startupData(makeUnique<WorkerThreadStartupData>(params, sourceCode, startMode, topOrigin))

, m_idbConnectionProxy(connectionProxy)

, m_socketProvider(socketProvider)

{

++workerThreadCounter;

}

WorkerThread::~WorkerThread()

{

ASSERT(workerThreadCounter);

--workerThreadCounter;

}

Ref<Thread> WorkerThread::createThread()

{

if (is<WorkerMainRunLoop>(runLoop())) {

// This worker should run on the main thread.

RunLoop::mainSingleton().dispatch([protectedThis = Ref { *this }] {

protectedThis->workerOrWorkletThread();

});

ASSERT(isMainThread());

return Thread::currentSingleton();

}

// WorkerOrWorkletThread::workerOrWorkletThread destroys the worker and expects a single reference to this.

SUPPRESS_UNCOUNTED_LAMBDA_CAPTURE return Thread::create(threadName(), [this] {

workerOrWorkletThread();

}, ThreadType::JavaScript);

}

RefPtr<WorkerOrWorkletGlobalScope> WorkerThread::createGlobalScope()

{

return createWorkerGlobalScope(m_startupData->params, WTF::move(m_startupData->origin), WTF::move(m_startupData->topOrigin));

}

bool WorkerThread::shouldWaitForWebInspectorOnStartup() const

{

return m_startupData->startMode == WorkerThreadStartMode::WaitForInspector;

}

void WorkerThread::evaluateScriptIfNecessary(String& exceptionMessage)

{

SetForScope isInStaticScriptEvaluation(m_isInStaticScriptEvaluation, true);

// We are currently holding only the initial script code. If the WorkerType is Module, we should fetch the entire graph before executing the rest of this.

// We invoke module loader as if we are executing inline module script tag in Document.

Ref globalScope = *this->globalScope();

WeakPtr<ScriptBufferSourceProvider> sourceProvider;

if (m_startupData->params.workerType == WorkerType::Classic) {

ScriptSourceCode sourceCode(m_startupData->sourceCode, URL(m_startupData->params.scriptURL));

sourceProvider = downcast<ScriptBufferSourceProvider>(sourceCode.provider());

NakedPtr<JSC::Exception> uncaughtException;

auto parseResult = globalScope->script()->evaluate(sourceCode, uncaughtException, &exceptionMessage);

if (uncaughtException && !globalScope->vm().isTerminationException(uncaughtException)) {

// Per the spec, if the script has a parse error, fire a simple Event at

// the Worker object rather than an ErrorEvent.

if (globalScope->settingsValues().workerParseErrorReportingEnabled && parseResult == WorkerOrWorkletScriptController::ParseResult::Failed)

globalScope->reportErrorToWorkerObject(exceptionMessage);

else {

JSC::JSLockHolder lock(globalScope->vm());

reportException(globalScope->script()->globalScopeWrapper(), uncaughtException);

}

finishedEvaluatingScript();

} else {

auto parameters = ModuleFetchParameters::create(JSC::ScriptFetchParameters::Type::JavaScript, emptyString(), /* isTopLevelModule */ true);

auto scriptFetcher = WorkerScriptFetcher::create(WTF::move(parameters), globalScope->credentials(), globalScope->destination(), globalScope->referrerPolicy());

ScriptSourceCode sourceCode(m_startupData->sourceCode, URL(m_startupData->params.scriptURL), { }, { }, JSC::SourceProviderSourceType::Module, scriptFetcher.copyRef());

sourceProvider = downcast<ScriptBufferSourceProvider>(sourceCode.provider());

bool success = globalScope->script()->loadModuleSynchronously(scriptFetcher.get(), sourceCode);

if (success) {

if (auto error = scriptFetcher->error()) {

if (std::optional<LoadableScript::ConsoleMessage> message = error->consoleMessage)

exceptionMessage = message->message;

else

exceptionMessage = "Importing a module script failed."_s;

globalScope->reportErrorToWorkerObject(exceptionMessage);

} else if (!scriptFetcher->wasCanceled()) {

globalScope->script()->linkAndEvaluateModule(scriptFetcher.get(), sourceCode, &exceptionMessage);

finishedEvaluatingScript();

}

if (sourceProvider)

globalScope->setMainScriptSourceProvider(*sourceProvider);

// Free the startup data to cause its member variable deref's happen on the worker's thread (since

// all ref/derefs of these objects are happening on the thread at this point). Note that

// WorkerThread::~WorkerThread happens on a different thread where it was created.

m_startupData = nullptr;

}

WorkerGlobalScope* WorkerThread::globalScope()

{

ASSERT(!thread() || thread() == &Thread::currentSingleton());

return downcast<WorkerGlobalScope>(WorkerOrWorkletThread::globalScope());

}

void WorkerThread::clearProxies()

{

m_workerLoaderProxy = nullptr;

m_workerDebuggerProxy = nullptr;

m_workerReportingProxy = nullptr;

m_workerBadgeProxy = nullptr;

}

} // namespace WebCore

WebKit/Source/WebCore/workers/WorkerThread.cpp at main · WebKit/WebKit · GitHub

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