1/*
2 * Copyright (C) 2014 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#ifndef FunctionHasExecutedCache_h
27#define FunctionHasExecutedCache_h
28
29#include <unordered_map>
30#include <wtf/HashMethod.h>
31#include <wtf/Vector.h>
32
33namespace JSC {
34
35class FunctionHasExecutedCache {
36public:
37 struct FunctionRange {
38 FunctionRange() {}
39 bool operator==(const FunctionRange& other) const
40 {
41 return m_start == other.m_start && m_end == other.m_end;
42 }
43 unsigned hash() const
44 {
45 return m_start * m_end;
46 }
47
48 unsigned m_start;
49 unsigned m_end;
50 };
51
52 bool hasExecutedAtOffset(intptr_t id, unsigned offset);
53 void insertUnexecutedRange(intptr_t id, unsigned start, unsigned end);
54 void removeUnexecutedRange(intptr_t id, unsigned start, unsigned end);
55 Vector<std::tuple<bool, unsigned, unsigned>> getFunctionRanges(intptr_t id);
56
57private:
58 typedef std::unordered_map<FunctionRange, bool, HashMethod<FunctionRange>> RangeMap;
59 typedef std::unordered_map<intptr_t, RangeMap> SourceIDToRangeMap;
60 SourceIDToRangeMap m_rangeMap;
61};
62
63} // namespace JSC
64
65#endif // FunctionHasExecutedCache_h
66