3c0a7fb4d612615811ab339b8ca95628bdc51130
[WebKit-https.git] / Source / JavaScriptCore / bytecode / StructureStubClearingWatchpoint.h
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/FastMalloc.h>
34 #include <wtf/Noncopyable.h>
35
36 namespace JSC {
37
38 class CodeBlock;
39 class StructureStubInfo;
40 class WatchpointsOnStructureStubInfo;
41
42 class StructureStubClearingWatchpoint : public Watchpoint {
43     WTF_MAKE_NONCOPYABLE(StructureStubClearingWatchpoint);
44     WTF_MAKE_FAST_ALLOCATED;
45 public:
46     StructureStubClearingWatchpoint(
47         const ObjectPropertyCondition& key,
48         WatchpointsOnStructureStubInfo& holder,
49         std::unique_ptr<StructureStubClearingWatchpoint> next)
50         : m_key(key)
51         , m_holder(holder)
52         , m_next(WTFMove(next))
53     {
54     }
55     
56     virtual ~StructureStubClearingWatchpoint();
57     
58     static StructureStubClearingWatchpoint* push(
59         const ObjectPropertyCondition& key,
60         WatchpointsOnStructureStubInfo& holder,
61         std::unique_ptr<StructureStubClearingWatchpoint>& head);
62
63 protected:
64     void fireInternal(VM&, const FireDetail&) override;
65
66 private:
67     ObjectPropertyCondition m_key;
68     WatchpointsOnStructureStubInfo& m_holder;
69     std::unique_ptr<StructureStubClearingWatchpoint> m_next;
70 };
71
72 class WatchpointsOnStructureStubInfo {
73     WTF_MAKE_NONCOPYABLE(WatchpointsOnStructureStubInfo);
74     WTF_MAKE_FAST_ALLOCATED;
75 public:
76     WatchpointsOnStructureStubInfo(CodeBlock* codeBlock, StructureStubInfo* stubInfo)
77         : m_codeBlock(codeBlock)
78         , m_stubInfo(stubInfo)
79     {
80     }
81     
82     ~WatchpointsOnStructureStubInfo();
83     
84     StructureStubClearingWatchpoint* addWatchpoint(const ObjectPropertyCondition& key);
85     
86     static StructureStubClearingWatchpoint* ensureReferenceAndAddWatchpoint(
87         std::unique_ptr<WatchpointsOnStructureStubInfo>& holderRef,
88         CodeBlock*, StructureStubInfo*, const ObjectPropertyCondition& key);
89     
90     CodeBlock* codeBlock() const { return m_codeBlock; }
91     StructureStubInfo* stubInfo() const { return m_stubInfo; }
92     
93 private:
94     CodeBlock* m_codeBlock;
95     StructureStubInfo* m_stubInfo;
96     std::unique_ptr<StructureStubClearingWatchpoint> m_head;
97 };
98
99 } // namespace JSC
100
101 #endif // ENABLE(JIT)