1/*
2 * Copyright (C) 2012, 2015 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 "ObjectPropertyCondition.h"
29#include "Watchpoint.h"
30
31#if ENABLE(JIT)
32
33#include <wtf/Bag.h>
34#include <wtf/FastMalloc.h>
35#include <wtf/Noncopyable.h>
36
37namespace JSC {
38
39class CodeBlock;
40class StructureStubInfo;
41class WatchpointsOnStructureStubInfo;
42
43class StructureStubClearingWatchpoint final : public Watchpoint {
44 WTF_MAKE_NONCOPYABLE(StructureStubClearingWatchpoint);
45 WTF_MAKE_FAST_ALLOCATED;
46public:
47 StructureStubClearingWatchpoint(
48 const ObjectPropertyCondition& key,
49 WatchpointsOnStructureStubInfo& holder)
50 : m_key(key)
51 , m_holder(holder)
52 {
53 }
54
55protected:
56 void fireInternal(VM&, const FireDetail&) override;
57
58private:
59 ObjectPropertyCondition m_key;
60 WatchpointsOnStructureStubInfo& m_holder;
61};
62
63class WatchpointsOnStructureStubInfo {
64 WTF_MAKE_NONCOPYABLE(WatchpointsOnStructureStubInfo);
65 WTF_MAKE_FAST_ALLOCATED;
66public:
67 WatchpointsOnStructureStubInfo(CodeBlock* codeBlock, StructureStubInfo* stubInfo)
68 : m_codeBlock(codeBlock)
69 , m_stubInfo(stubInfo)
70 {
71 }
72
73 StructureStubClearingWatchpoint* addWatchpoint(const ObjectPropertyCondition& key);
74
75 static StructureStubClearingWatchpoint* ensureReferenceAndAddWatchpoint(
76 std::unique_ptr<WatchpointsOnStructureStubInfo>& holderRef,
77 CodeBlock*, StructureStubInfo*, const ObjectPropertyCondition& key);
78
79 CodeBlock* codeBlock() const { return m_codeBlock; }
80 StructureStubInfo* stubInfo() const { return m_stubInfo; }
81
82 bool isValid() const;
83
84private:
85 CodeBlock* m_codeBlock;
86 StructureStubInfo* m_stubInfo;
87 Bag<StructureStubClearingWatchpoint> m_watchpoints;
88};
89
90} // namespace JSC
91
92#endif // ENABLE(JIT)
93