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/*
* Copyright (C) 2008-2021 Apple Inc. All Rights Reserved.
* Copyright (C) 2012 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.
* 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.
*/
#pragma once
#include "FetchOptions.h"
#include "WorkerThreadType.h"
#include <JavaScriptCore/Debugger.h>
#include <JavaScriptCore/JSRunLoopTimer.h>
#include <wtf/Forward.h>
#include <wtf/Lock.h>
#include <wtf/MessageQueue.h>
#include <wtf/NakedPtr.h>
namespace JSC {
class AbstractModuleRecord;
class Exception;
class JSGlobalObject;
class JSModuleRecord;
class VM;
}
namespace WebCore {
class Exception;
class JSDOMGlobalObject;
class ScriptSourceCode;
class WorkerConsoleClient;
class WorkerOrWorkletGlobalScope;
class WorkerScriptFetcher;
class WorkerOrWorkletScriptController {
WTF_MAKE_NONCOPYABLE(WorkerOrWorkletScriptController);
WTF_MAKE_FAST_ALLOCATED;
public:
WorkerOrWorkletScriptController(WorkerThreadType, Ref<JSC::VM>&&, WorkerOrWorkletGlobalScope*);
~WorkerOrWorkletScriptController();
void releaseHeapAccess();
void acquireHeapAccess();
void addTimerSetNotification(JSC::JSRunLoopTimer::TimerNotificationCallback);
void removeTimerSetNotification(JSC::JSRunLoopTimer::TimerNotificationCallback);
JSDOMGlobalObject* globalScopeWrapper()
{
initScriptIfNeeded();
return m_globalScopeWrapper.get();
}
void attachDebugger(JSC::Debugger*);
void detachDebugger(JSC::Debugger*);
// Async request to terminate a JS run execution. Eventually causes termination
// exception raised during JS execution, if the worker thread happens to run JS.
// After JS execution was terminated in this way, the Worker thread has to use
// forbidExecution()/isExecutionForbidden() to guard against reentry into JS.
// Can be called from any thread.
void scheduleExecutionTermination();
bool isTerminatingExecution() const;
// Called on Worker thread when JS exits with termination exception caused by forbidExecution() request,
// or by Worker thread termination code to prevent future entry into JS.
void forbidExecution();
bool isExecutionForbidden() const;
JSC::VM& vm() { return *m_vm; }
void setException(JSC::Exception*);
void disableEval(const String& errorMessage);
void disableWebAssembly(const String& errorMessage);
void evaluate(const ScriptSourceCode&, String* returnedExceptionMessage = nullptr);
void evaluate(const ScriptSourceCode&, NakedPtr<JSC::Exception>& returnedException, String* returnedExceptionMessage = nullptr);
JSC::JSValue evaluateModule(JSC::AbstractModuleRecord&, JSC::JSValue awaitedValue, JSC::JSValue resumeMode);
void linkAndEvaluateModule(WorkerScriptFetcher&, const ScriptSourceCode&, String* returnedExceptionMessage = nullptr);
bool loadModuleSynchronously(WorkerScriptFetcher&, const ScriptSourceCode&);
void loadAndEvaluateModule(const URL& moduleURL, FetchOptions::Credentials, CompletionHandler<void(std::optional<Exception>&&)>&&);
protected:
WorkerOrWorkletGlobalScope* globalScope() const { return m_globalScope; }
void initScriptIfNeeded()
{
if (!m_globalScopeWrapper)
initScript();
}
WEBCORE_EXPORT void initScript();
private:
template<typename JSGlobalScopePrototype, typename JSGlobalScope, typename GlobalScope>
void initScriptWithSubclass();
RefPtr<JSC::VM> m_vm;
WorkerOrWorkletGlobalScope* m_globalScope;
JSC::Strong<JSDOMGlobalObject> m_globalScopeWrapper;
std::unique_ptr<WorkerConsoleClient> m_consoleClient;
mutable Lock m_scheduledTerminationLock;
bool m_isTerminatingExecution WTF_GUARDED_BY_LOCK(m_scheduledTerminationLock) { false };
};
} // namespace WebCore
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