1/*
2 * Copyright (C) 2015-2017 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 "ObjectPropertyCondition.h"
29#include "Watchpoint.h"
30#include <wtf/FastMalloc.h>
31#include <wtf/Noncopyable.h>
32
33namespace JSC {
34
35// FIXME: This isn't actually a Watchpoint. We should probably have a name which better reflects that:
36// https://bugs.webkit.org/show_bug.cgi?id=202381
37class AdaptiveInferredPropertyValueWatchpointBase {
38 WTF_MAKE_NONCOPYABLE(AdaptiveInferredPropertyValueWatchpointBase);
39 WTF_MAKE_FAST_ALLOCATED;
40
41public:
42 AdaptiveInferredPropertyValueWatchpointBase(const ObjectPropertyCondition&);
43
44 const ObjectPropertyCondition& key() const { return m_key; }
45
46 void install(VM&);
47
48 virtual ~AdaptiveInferredPropertyValueWatchpointBase() = default;
49
50 class StructureWatchpoint final : public Watchpoint {
51 public:
52 StructureWatchpoint()
53 : Watchpoint(Watchpoint::Type::AdaptiveInferredPropertyValueStructure)
54 { }
55
56 void fireInternal(VM&, const FireDetail&);
57 };
58 // Own destructor may not be called. Keep members trivially destructible.
59 static_assert(sizeof(StructureWatchpoint) == sizeof(Watchpoint), "");
60
61 class PropertyWatchpoint final : public Watchpoint {
62 public:
63 PropertyWatchpoint()
64 : Watchpoint(Watchpoint::Type::AdaptiveInferredPropertyValueProperty)
65 { }
66
67 void fireInternal(VM&, const FireDetail&);
68 };
69 // Own destructor may not be called. Keep members trivially destructible.
70 static_assert(sizeof(PropertyWatchpoint) == sizeof(Watchpoint), "");
71
72protected:
73 virtual bool isValid() const;
74 virtual void handleFire(VM&, const FireDetail&) = 0;
75
76private:
77 void fire(VM&, const FireDetail&);
78
79 ObjectPropertyCondition m_key;
80 StructureWatchpoint m_structureWatchpoint;
81 PropertyWatchpoint m_propertyWatchpoint;
82};
83
84} // namespace JSC
85