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_NONCOPYABLE(PCToCodeOriginMapBuilder);
48 friend class PCToCodeOriginMap;
49
50public:
51 PCToCodeOriginMapBuilder(VM&);
52 PCToCodeOriginMapBuilder(PCToCodeOriginMapBuilder&& other);
53
54#if ENABLE(FTL_JIT)
55 PCToCodeOriginMapBuilder(VM&, B3::PCToOriginMap&&);
56#endif
57
58 void appendItem(MacroAssembler::Label, const CodeOrigin&);
59 static CodeOrigin defaultCodeOrigin() { return CodeOrigin(0, nullptr); }
60
61 bool didBuildMapping() const { return m_shouldBuildMapping; }
62
63private:
64
65 struct CodeRange {
66 MacroAssembler::Label start;
67 MacroAssembler::Label end;
68 CodeOrigin codeOrigin;
69 };
70
71 VM& m_vm;
72 Vector<CodeRange> m_codeRanges;
73 bool m_shouldBuildMapping;
74};
75
76// FIXME: <rdar://problem/39436658>
77class PCToCodeOriginMap {
78 WTF_MAKE_NONCOPYABLE(PCToCodeOriginMap);
79public:
80 PCToCodeOriginMap(PCToCodeOriginMapBuilder&&, LinkBuffer&);
81 ~PCToCodeOriginMap();
82
83 Optional<CodeOrigin> findPC(void* pc) const;
84
85 double memorySize();
86
87private:
88 size_t m_compressedPCBufferSize;
89 size_t m_compressedCodeOriginsSize;
90 uint8_t* m_compressedPCs;
91 uint8_t* m_compressedCodeOrigins;
92 uintptr_t m_pcRangeStart;
93 uintptr_t m_pcRangeEnd;
94};
95
96} // namespace JSC
97
98#endif // ENABLE(JIT)
99