1/*
2 * Copyright (C) 2016-2018 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 "CodeOrigin.h"
31#include "MacroAssembler.h"
32#include "VM.h"
33#include <wtf/Vector.h>
34
35namespace JSC {
36
37#if ENABLE(FTL_JIT)
38namespace B3 {
39class PCToOriginMap;
40}
41#endif
42
43class LinkBuffer;
44class PCToCodeOriginMapBuilder;
45
46class PCToCodeOriginMapBuilder {
47 WTF_MAKE_FAST_ALLOCATED;
48 WTF_MAKE_NONCOPYABLE(PCToCodeOriginMapBuilder);
49 friend class PCToCodeOriginMap;
50
51public:
52 PCToCodeOriginMapBuilder(VM&);
53 PCToCodeOriginMapBuilder(PCToCodeOriginMapBuilder&& other);
54
55#if ENABLE(FTL_JIT)
56 PCToCodeOriginMapBuilder(VM&, B3::PCToOriginMap&&);
57#endif
58
59 void appendItem(MacroAssembler::Label, const CodeOrigin&);
60 static CodeOrigin defaultCodeOrigin() { return CodeOrigin(BytecodeIndex(0)); }
61
62 bool didBuildMapping() const { return m_shouldBuildMapping; }
63
64private:
65
66 struct CodeRange {
67 MacroAssembler::Label start;
68 MacroAssembler::Label end;
69 CodeOrigin codeOrigin;
70 };
71
72 VM& m_vm;
73 Vector<CodeRange> m_codeRanges;
74 bool m_shouldBuildMapping;
75};
76
77// FIXME: <rdar://problem/39436658>
78class PCToCodeOriginMap {
79 WTF_MAKE_FAST_ALLOCATED;
80 WTF_MAKE_NONCOPYABLE(PCToCodeOriginMap);
81public:
82 PCToCodeOriginMap(PCToCodeOriginMapBuilder&&, LinkBuffer&);
83 ~PCToCodeOriginMap();
84
85 Optional<CodeOrigin> findPC(void* pc) const;
86
87 double memorySize();
88
89private:
90 size_t m_compressedPCBufferSize;
91 size_t m_compressedCodeOriginsSize;
92 uint8_t* m_compressedPCs;
93 uint8_t* m_compressedCodeOrigins;
94 uintptr_t m_pcRangeStart;
95 uintptr_t m_pcRangeEnd;
96};
97
98} // namespace JSC
99
100#endif // ENABLE(JIT)
101