1/*
2 * Copyright (C) 2015-2018 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#if ENABLE(JIT)
29
30#include "CallEdge.h"
31#include "CallVariant.h"
32#include "GCAwareJITStubRoutine.h"
33#include <wtf/Noncopyable.h>
34#include <wtf/UniqueArray.h>
35#include <wtf/Vector.h>
36
37namespace JSC {
38
39class CallLinkInfo;
40
41class PolymorphicCallNode : public PackedRawSentinelNode<PolymorphicCallNode> {
42 WTF_MAKE_NONCOPYABLE(PolymorphicCallNode);
43public:
44 PolymorphicCallNode(CallLinkInfo* info)
45 : m_callLinkInfo(info)
46 {
47 }
48
49 ~PolymorphicCallNode();
50
51 void unlink(VM&);
52
53 bool hasCallLinkInfo(CallLinkInfo* info) { return m_callLinkInfo.get() == info; }
54 void clearCallLinkInfo();
55
56private:
57 PackedPtr<CallLinkInfo> m_callLinkInfo;
58};
59
60class PolymorphicCallCase {
61public:
62 PolymorphicCallCase()
63 : m_codeBlock(nullptr)
64 {
65 }
66
67 PolymorphicCallCase(CallVariant variant, CodeBlock* codeBlock)
68 : m_variant(variant)
69 , m_codeBlock(codeBlock)
70 {
71 }
72
73 CallVariant variant() const { return m_variant; }
74 CodeBlock* codeBlock() const { return m_codeBlock; }
75
76 void dump(PrintStream&) const;
77
78private:
79 CallVariant m_variant;
80 CodeBlock* m_codeBlock;
81};
82
83class PolymorphicCallStubRoutine : public GCAwareJITStubRoutine {
84public:
85 PolymorphicCallStubRoutine(
86 const MacroAssemblerCodeRef<JITStubRoutinePtrTag>&, VM&, const JSCell* owner,
87 CallFrame* callerFrame, CallLinkInfo&, const Vector<PolymorphicCallCase>&,
88 UniqueArray<uint32_t>&& fastCounts);
89
90 virtual ~PolymorphicCallStubRoutine();
91
92 CallVariantList variants() const;
93 bool hasEdges() const;
94 CallEdgeList edges() const;
95
96 void clearCallNodesFor(CallLinkInfo*);
97
98 template<typename Functor>
99 void forEachDependentCell(const Functor& functor)
100 {
101 for (auto& variant : m_variants)
102 functor(variant.get());
103 }
104
105 bool visitWeak(VM&) override;
106
107protected:
108 void markRequiredObjectsInternal(SlotVisitor&) override;
109
110private:
111 Vector<WriteBarrier<JSCell>, 2> m_variants;
112 UniqueArray<uint32_t> m_fastCounts;
113 Bag<PolymorphicCallNode> m_callNodes;
114};
115
116} // namespace JSC
117
118#endif // ENABLE(JIT)
119