1 | /* |
2 | * Copyright (C) 2016-2018 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 | #include "Environment.h" |
29 | #include "Mutex.h" |
30 | #include "StaticPerProcess.h" |
31 | #include <mutex> |
32 | #include <unordered_map> |
33 | |
34 | #if BOS(DARWIN) |
35 | #include <malloc/malloc.h> |
36 | #endif |
37 | |
38 | namespace bmalloc { |
39 | |
40 | class DebugHeap : private StaticPerProcess<DebugHeap> { |
41 | public: |
42 | DebugHeap(std::lock_guard<Mutex>&); |
43 | |
44 | void* malloc(size_t, bool crashOnFailure); |
45 | void* memalign(size_t alignment, size_t, bool crashOnFailure); |
46 | void* realloc(void*, size_t, bool crashOnFailure); |
47 | void free(void*); |
48 | |
49 | void* memalignLarge(size_t alignment, size_t); |
50 | void freeLarge(void* base); |
51 | |
52 | void scavenge(); |
53 | void dump(); |
54 | |
55 | static DebugHeap* tryGet(); |
56 | |
57 | private: |
58 | #if BOS(DARWIN) |
59 | malloc_zone_t* m_zone; |
60 | #endif |
61 | |
62 | // This is the debug heap. We can use whatever data structures we like. It doesn't matter. |
63 | size_t m_pageSize { 0 }; |
64 | std::unordered_map<void*, size_t> m_sizeMap; |
65 | }; |
66 | DECLARE_STATIC_PER_PROCESS_STORAGE(DebugHeap); |
67 | |
68 | extern BEXPORT DebugHeap* debugHeapCache; |
69 | BINLINE DebugHeap* DebugHeap::tryGet() |
70 | { |
71 | if (debugHeapCache) |
72 | return debugHeapCache; |
73 | if (Environment::get()->isDebugHeapEnabled()) { |
74 | debugHeapCache = DebugHeap::get(); |
75 | return debugHeapCache; |
76 | } |
77 | return nullptr; |
78 | } |
79 | |
80 | } // namespace bmalloc |
81 | |