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(const ObjectPropertyCondition& key, WatchpointsOnStructureStubInfo& holder)
48 : Watchpoint(Watchpoint::Type::StructureStubClearing)
49 , m_holder(&holder)
50 , m_key(key)
51 {
52 }
53
54 void fireInternal(VM&, const FireDetail&);
55
56private:
57 // Own destructor may not be called. Keep members trivially destructible.
58 JSC_WATCHPOINT_FIELD(PackedPtr<WatchpointsOnStructureStubInfo>, m_holder);
59 JSC_WATCHPOINT_FIELD(ObjectPropertyCondition, m_key);
60};
61
62class WatchpointsOnStructureStubInfo {
63 WTF_MAKE_NONCOPYABLE(WatchpointsOnStructureStubInfo);
64 WTF_MAKE_FAST_ALLOCATED;
65public:
66 WatchpointsOnStructureStubInfo(CodeBlock* codeBlock, StructureStubInfo* stubInfo)
67 : m_codeBlock(codeBlock)
68 , m_stubInfo(stubInfo)
69 {
70 }
71
72 StructureStubClearingWatchpoint* addWatchpoint(const ObjectPropertyCondition& key);
73
74 static StructureStubClearingWatchpoint* ensureReferenceAndAddWatchpoint(
75 std::unique_ptr<WatchpointsOnStructureStubInfo>& holderRef,
76 CodeBlock*, StructureStubInfo*, const ObjectPropertyCondition& key);
77
78 CodeBlock* codeBlock() const { return m_codeBlock; }
79 StructureStubInfo* stubInfo() const { return m_stubInfo; }
80
81 bool isValid() const;
82
83private:
84 CodeBlock* m_codeBlock;
85 StructureStubInfo* m_stubInfo;
86 Bag<StructureStubClearingWatchpoint> m_watchpoints;
87};
88
89} // namespace JSC
90
91#endif // ENABLE(JIT)
92