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