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/*
* Copyright (C) 2008, 2015 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.
*
*/
#ifndef WorkerScriptController_h
#define WorkerScriptController_h
#include <debugger/Debugger.h>
#include <heap/Strong.h>
#include <wtf/Forward.h>
#include <wtf/Lock.h>
#include <wtf/NakedPtr.h>
namespace Deprecated {
class ScriptValue;
}
namespace JSC {
class VM;
}
namespace WebCore {
class JSWorkerGlobalScope;
class ScriptSourceCode;
class WorkerConsoleClient;
class WorkerGlobalScope;
class WorkerScriptController {
WTF_MAKE_NONCOPYABLE(WorkerScriptController); WTF_MAKE_FAST_ALLOCATED;
public:
WorkerScriptController(WorkerGlobalScope*);
~WorkerScriptController();
JSWorkerGlobalScope* workerGlobalScopeWrapper()
{
initScriptIfNeeded();
return m_workerGlobalScopeWrapper.get();
}
void evaluate(const ScriptSourceCode&);
void evaluate(const ScriptSourceCode&, NakedPtr<JSC::Exception>& returnedException);
void setException(JSC::Exception*);
// 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;
void disableEval(const String& errorMessage);
JSC::VM& vm() { return *m_vm; }
void attachDebugger(JSC::Debugger*);
void detachDebugger(JSC::Debugger*);
private:
void initScriptIfNeeded()
{
if (!m_workerGlobalScopeWrapper)
initScript();
}
void initScript();
RefPtr<JSC::VM> m_vm;
WorkerGlobalScope* m_workerGlobalScope;
JSC::Strong<JSWorkerGlobalScope> m_workerGlobalScopeWrapper;
std::unique_ptr<WorkerConsoleClient> m_consoleClient;
bool m_executionForbidden;
bool m_isTerminatingExecution { false };
mutable Lock m_scheduledTerminationMutex;
};
} // namespace WebCore
#endif // WorkerScriptController_h
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