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/*
* Copyright (C) 2013-2017 Apple 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 <wtf/Lock.h>
#include <wtf/MonotonicTime.h>
#include <wtf/Ref.h>
#include <wtf/ThreadSafeRefCounted.h>
#include <wtf/WorkQueue.h>
namespace JSC {
class CallFrame;
class JSGlobalObject;
class VM;
class Watchdog : public WTF::ThreadSafeRefCounted<Watchdog> {
WTF_MAKE_FAST_ALLOCATED;
public:
class Scope;
Watchdog(VM*);
void willDestroyVM(VM*);
typedef bool (*ShouldTerminateCallback)(JSGlobalObject*, void* data1, void* data2);
void setTimeLimit(Seconds limit, ShouldTerminateCallback = nullptr, void* data1 = nullptr, void* data2 = nullptr);
bool shouldTerminate(JSGlobalObject*);
bool hasTimeLimit();
void enteredVM();
void exitedVM();
static constexpr Seconds noTimeLimit = Seconds::infinity();
private:
void startTimer(Seconds timeLimit);
void stopTimer();
bool m_hasEnteredVM { false };
Lock m_lock; // Guards access to m_vm.
VM* m_vm;
Seconds m_timeLimit;
Seconds m_cpuDeadline;
MonotonicTime m_deadline;
ShouldTerminateCallback m_callback;
void* m_callbackData1;
void* m_callbackData2;
Ref<WorkQueue> m_timerQueue;
friend class LLIntOffsetsExtractor;
};
} // namespace JSC