/* * 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/Ref.h> #include <wtf/ThreadSafeRefCounted.h> #include <wtf/WorkQueue.h> namespace JSC { class ExecState; class VM; class Watchdog : public WTF::ThreadSafeRefCounted<Watchdog> { WTF_MAKE_FAST_ALLOCATED; public: class Scope; Watchdog(VM*); void willDestroyVM(VM*); typedef bool (*ShouldTerminateCallback)(ExecState*, void* data1, void* data2); void setTimeLimit(Seconds limit, ShouldTerminateCallback = 0, void* data1 = 0, void* data2 = 0); bool shouldTerminate(ExecState*); bool hasTimeLimit(); void enteredVM(); void exitedVM(); static const Seconds noTimeLimit; private: void startTimer(Seconds timeLimit); void stopTimer(); Lock m_lock; // Guards access to m_vm. VM* m_vm; Seconds m_timeLimit; Seconds m_cpuDeadline; MonotonicTime m_deadline; bool m_hasEnteredVM { false }; ShouldTerminateCallback m_callback; void* m_callbackData1; void* m_callbackData2; Ref<WorkQueue> m_timerQueue; friend class LLIntOffsetsExtractor; }; } // namespace JSC