1/*
2 * Copyright (C) 2012-2019 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 "BytecodeIndex.h"
29#include "CodeBlockHash.h"
30#include "JSCJSValue.h"
31#include <wtf/PrintStream.h>
32
33namespace JSC {
34
35class CodeBlock;
36
37namespace Profiler {
38
39class Bytecodes;
40class Database;
41
42class Origin {
43public:
44 Origin() = default;
45 Origin(WTF::HashTableDeletedValueType)
46 : m_bytecodeIndex(WTF::HashTableDeletedValue)
47 { }
48
49 Origin(Bytecodes* bytecodes, BytecodeIndex bytecodeIndex)
50 : m_bytecodes(bytecodes)
51 , m_bytecodeIndex(bytecodeIndex)
52 {
53 ASSERT(m_bytecodeIndex.offset() < std::numeric_limits<unsigned>::max() - 1);
54 }
55
56 Origin(Database&, CodeBlock*, BytecodeIndex);
57
58 bool operator!() const { return !m_bytecodeIndex; }
59
60 Bytecodes* bytecodes() const { return m_bytecodes; }
61 BytecodeIndex bytecodeIndex() const { return m_bytecodeIndex; }
62
63 bool operator==(const Origin&) const;
64 bool operator!=(const Origin& other) const { return !(*this == other); }
65 unsigned hash() const;
66
67 bool isHashTableDeletedValue() const;
68
69 void dump(PrintStream&) const;
70 JSValue toJS(JSGlobalObject*) const;
71
72private:
73 Bytecodes* m_bytecodes;
74 BytecodeIndex m_bytecodeIndex;
75};
76
77inline bool Origin::operator==(const Origin& other) const
78{
79 return m_bytecodes == other.m_bytecodes
80 && m_bytecodeIndex == other.m_bytecodeIndex;
81}
82
83inline unsigned Origin::hash() const
84{
85 return WTF::PtrHash<Bytecodes*>::hash(m_bytecodes) + m_bytecodeIndex.hash();
86}
87
88inline bool Origin::isHashTableDeletedValue() const
89{
90 return m_bytecodeIndex.isHashTableDeletedValue();
91}
92
93struct OriginHash {
94 static unsigned hash(const Origin& key) { return key.hash(); }
95 static bool equal(const Origin& a, const Origin& b) { return a == b; }
96 static constexpr bool safeToCompareToEmptyOrDeleted = true;
97};
98
99} } // namespace JSC::Profiler
100
101namespace WTF {
102
103template<typename T> struct DefaultHash;
104template<> struct DefaultHash<JSC::Profiler::Origin> {
105 typedef JSC::Profiler::OriginHash Hash;
106};
107
108template<typename T> struct HashTraits;
109template<> struct HashTraits<JSC::Profiler::Origin> : SimpleClassHashTraits<JSC::Profiler::Origin> { };
110
111} // namespace WTF
112