1/*
2 * Copyright (C) 2012 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#ifndef StructureStubClearingWatchpoint_h
27#define StructureStubClearingWatchpoint_h
28
29#include "Watchpoint.h"
30#include <wtf/Platform.h>
31
32#if ENABLE(JIT)
33
34#include <wtf/FastAllocBase.h>
35#include <wtf/Noncopyable.h>
36#include <wtf/OwnPtr.h>
37#include <wtf/PassOwnPtr.h>
38#include <wtf/RefCounted.h>
39#include <wtf/RefPtr.h>
40
41namespace JSC {
42
43class CodeBlock;
44class WatchpointsOnStructureStubInfo;
45struct StructureStubInfo;
46
47class StructureStubClearingWatchpoint : public Watchpoint {
48    WTF_MAKE_NONCOPYABLE(StructureStubClearingWatchpoint);
49    WTF_MAKE_FAST_ALLOCATED;
50public:
51    StructureStubClearingWatchpoint(
52        WatchpointsOnStructureStubInfo& holder)
53        : m_holder(holder)
54    {
55    }
56
57    StructureStubClearingWatchpoint(
58        WatchpointsOnStructureStubInfo& holder,
59        PassOwnPtr<StructureStubClearingWatchpoint> next)
60        : m_holder(holder)
61        , m_next(next)
62    {
63    }
64
65    virtual ~StructureStubClearingWatchpoint();
66
67    static StructureStubClearingWatchpoint* push(
68        WatchpointsOnStructureStubInfo& holder,
69        OwnPtr<StructureStubClearingWatchpoint>& head);
70
71protected:
72    void fireInternal();
73
74private:
75    WatchpointsOnStructureStubInfo& m_holder;
76    OwnPtr<StructureStubClearingWatchpoint> m_next;
77};
78
79class WatchpointsOnStructureStubInfo : public RefCounted<WatchpointsOnStructureStubInfo> {
80public:
81    WatchpointsOnStructureStubInfo(CodeBlock* codeBlock, StructureStubInfo* stubInfo)
82        : m_codeBlock(codeBlock)
83        , m_stubInfo(stubInfo)
84    {
85    }
86
87    ~WatchpointsOnStructureStubInfo();
88
89    StructureStubClearingWatchpoint* addWatchpoint();
90
91    static StructureStubClearingWatchpoint* ensureReferenceAndAddWatchpoint(
92        RefPtr<WatchpointsOnStructureStubInfo>& holderRef,
93        CodeBlock*, StructureStubInfo*);
94
95    CodeBlock* codeBlock() const { return m_codeBlock; }
96    StructureStubInfo* stubInfo() const { return m_stubInfo; }
97
98private:
99    CodeBlock* m_codeBlock;
100    StructureStubInfo* m_stubInfo;
101    OwnPtr<StructureStubClearingWatchpoint> m_head;
102};
103
104} // namespace JSC
105
106#endif // ENABLE(JIT)
107
108#endif // StructureStubClearingWatchpoint_h
109
110