1/*
2 * Copyright (C) 2013-2017 Apple Inc. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 * notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 * notice, this list of conditions and the following disclaimer in the
11 * documentation and/or other materials provided with the distribution.
12 *
13 * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
14 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
16 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR
17 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
18 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
19 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
20 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
21 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
23 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26#pragma once
27
28#include <wtf/Lock.h>
29#include <wtf/MonotonicTime.h>
30#include <wtf/Ref.h>
31#include <wtf/ThreadSafeRefCounted.h>
32#include <wtf/WorkQueue.h>
33
34namespace JSC {
35
36class CallFrame;
37class JSGlobalObject;
38class VM;
39
40class Watchdog : public WTF::ThreadSafeRefCounted<Watchdog> {
41 WTF_MAKE_FAST_ALLOCATED;
42public:
43 class Scope;
44
45 Watchdog(VM*);
46 void willDestroyVM(VM*);
47
48 typedef bool (*ShouldTerminateCallback)(JSGlobalObject*, void* data1, void* data2);
49 void setTimeLimit(Seconds limit, ShouldTerminateCallback = 0, void* data1 = 0, void* data2 = 0);
50
51 bool shouldTerminate(JSGlobalObject*);
52
53 bool hasTimeLimit();
54 void enteredVM();
55 void exitedVM();
56
57 static constexpr Seconds noTimeLimit = Seconds::infinity();
58
59private:
60 void startTimer(Seconds timeLimit);
61 void stopTimer();
62
63 bool m_hasEnteredVM { false };
64
65 Lock m_lock; // Guards access to m_vm.
66 VM* m_vm;
67
68 Seconds m_timeLimit;
69
70 Seconds m_cpuDeadline;
71 MonotonicTime m_deadline;
72
73 ShouldTerminateCallback m_callback;
74 void* m_callbackData1;
75 void* m_callbackData2;
76
77 Ref<WorkQueue> m_timerQueue;
78
79 friend class LLIntOffsetsExtractor;
80};
81
82} // namespace JSC
83