1/*
2 * Copyright (C) 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 "CodeLocation.h"
31#include <wtf/StdLibExtras.h>
32#include <wtf/Vector.h>
33
34namespace JSC {
35
36class JITCodeMap {
37private:
38 struct Entry {
39 Entry() { }
40
41 Entry(unsigned bytecodeIndex, CodeLocationLabel<JSEntryPtrTag> codeLocation)
42 : m_bytecodeIndex(bytecodeIndex)
43 , m_codeLocation(codeLocation)
44 { }
45
46 inline unsigned bytecodeIndex() const { return m_bytecodeIndex; }
47 inline CodeLocationLabel<JSEntryPtrTag> codeLocation() { return m_codeLocation; }
48
49 private:
50 unsigned m_bytecodeIndex;
51 CodeLocationLabel<JSEntryPtrTag> m_codeLocation;
52 };
53
54public:
55 void append(unsigned bytecodeIndex, CodeLocationLabel<JSEntryPtrTag> codeLocation)
56 {
57 m_entries.append({ bytecodeIndex, codeLocation });
58 }
59
60 void finish() { m_entries.shrinkToFit(); }
61
62 CodeLocationLabel<JSEntryPtrTag> find(unsigned bytecodeIndex) const
63 {
64 auto* entry =
65 binarySearch<Entry, unsigned>(m_entries,
66 m_entries.size(), bytecodeIndex, [] (Entry* entry) {
67 return entry->bytecodeIndex();
68 });
69 if (!entry)
70 return CodeLocationLabel<JSEntryPtrTag>();
71 return entry->codeLocation();
72 }
73
74 explicit operator bool() const { return m_entries.size(); }
75
76private:
77 Vector<Entry> m_entries;
78};
79
80} // namespace JSC
81
82#endif // ENABLE(JIT)
83