1/*
2 * Copyright (C) 2009-2019 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 "Heap.h"
29
30namespace JSC {
31
32class CodeBlockSet;
33class HeapCell;
34class JITStubRoutineSet;
35
36class ConservativeRoots {
37public:
38 ConservativeRoots(Heap&);
39 ~ConservativeRoots();
40
41 void add(void* begin, void* end);
42 void add(void* begin, void* end, JITStubRoutineSet&, CodeBlockSet&);
43
44 size_t size() const;
45 HeapCell** roots() const;
46
47private:
48 static constexpr size_t inlineCapacity = 128;
49 static constexpr size_t nonInlineCapacity = 8192 / sizeof(HeapCell*);
50
51 template<typename MarkHook>
52 void genericAddPointer(void*, HeapVersion markingVersion, HeapVersion newlyAllocatedVersion, TinyBloomFilter, MarkHook&);
53
54 template<typename MarkHook>
55 void genericAddSpan(void*, void* end, MarkHook&);
56
57 void grow();
58
59 HeapCell** m_roots;
60 size_t m_size;
61 size_t m_capacity;
62 Heap& m_heap;
63 HeapCell* m_inlineRoots[inlineCapacity];
64};
65
66inline size_t ConservativeRoots::size() const
67{
68 return m_size;
69}
70
71inline HeapCell** ConservativeRoots::roots() const
72{
73 return m_roots;
74}
75
76} // namespace JSC
77