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1 // Copyright 2016 The Chromium Authors. All rights reserved. | 1 // Copyright 2016 The Chromium Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #include "base/allocator/allocator_shim.h" | 5 #include "base/allocator/allocator_shim.h" |
6 | 6 |
7 // This translation unit defines a default dispatch for the allocator shim which | 7 // This translation unit defines a default dispatch for the allocator shim which |
8 // routes allocations to libc functions. | 8 // routes allocations to libc functions. |
9 // The code here is strongly inspired from tcmalloc's libc_override_glibc.h. | 9 // The code here is strongly inspired from tcmalloc's libc_override_glibc.h. |
10 | 10 |
11 extern "C" { | 11 extern "C" { |
12 void* __libc_malloc(size_t size); | 12 void* __libc_malloc(size_t size); |
13 void* __libc_calloc(size_t n, size_t size); | 13 void* __libc_calloc(size_t n, size_t size); |
14 void* __libc_realloc(void* address, size_t size); | 14 void* __libc_realloc(void* address, size_t size); |
15 void* __libc_memalign(size_t alignment, size_t size); | 15 void* __libc_memalign(size_t alignment, size_t size); |
16 void __libc_free(void* ptr); | 16 void __libc_free(void* ptr); |
17 size_t __malloc_usable_size(void* ptr); | |
Primiano Tucci (use gerrit)
2016/08/24 15:28:46
not sure you ned this fwd declaration
Sigurður Ásgeirsson
2016/09/01 15:18:17
Done.
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17 } // extern "C" | 18 } // extern "C" |
18 | 19 |
19 namespace { | 20 namespace { |
20 | 21 |
21 using base::allocator::AllocatorDispatch; | 22 using base::allocator::AllocatorDispatch; |
22 | 23 |
23 void* GlibcMalloc(const AllocatorDispatch*, size_t size) { | 24 void* GlibcMalloc(const AllocatorDispatch*, size_t size) { |
24 return __libc_malloc(size); | 25 return __libc_malloc(size); |
25 } | 26 } |
26 | 27 |
27 void* GlibcCalloc(const AllocatorDispatch*, size_t n, size_t size) { | 28 void* GlibcCalloc(const AllocatorDispatch*, size_t n, size_t size) { |
28 return __libc_calloc(n, size); | 29 return __libc_calloc(n, size); |
29 } | 30 } |
30 | 31 |
31 void* GlibcRealloc(const AllocatorDispatch*, void* address, size_t size) { | 32 void* GlibcRealloc(const AllocatorDispatch*, void* address, size_t size) { |
32 return __libc_realloc(address, size); | 33 return __libc_realloc(address, size); |
33 } | 34 } |
34 | 35 |
35 void* GlibcMemalign(const AllocatorDispatch*, size_t alignment, size_t size) { | 36 void* GlibcMemalign(const AllocatorDispatch*, size_t alignment, size_t size) { |
36 return __libc_memalign(alignment, size); | 37 return __libc_memalign(alignment, size); |
37 } | 38 } |
38 | 39 |
39 void GlibcFree(const AllocatorDispatch*, void* address) { | 40 void GlibcFree(const AllocatorDispatch*, void* address) { |
40 __libc_free(address); | 41 __libc_free(address); |
41 } | 42 } |
43 } | |
44 void GlibcFree(const AllocatorDispatch*, void* address) { | |
Primiano Tucci (use gerrit)
2016/08/24 14:11:46
seems like you accidentally copy/pasted this twice
Sigurður Ásgeirsson
2016/09/01 15:18:18
Ooops, I wonder how this even compiled. Fixed :/.
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45 __libc_free(address); | |
46 } | |
47 | |
48 size_t GlibcGetSizeEstimate(const AllocatorDispatch*, void* address) { | |
49 return __libc_usable_size(address); | |
Primiano Tucci (use gerrit)
2016/08/24 14:11:46
I don't think you need to go down into __libc inte
Primiano Tucci (use gerrit)
2016/08/24 15:28:46
I think you mean __malloc_usable_size here.
The n
Sigurður Ásgeirsson
2016/09/01 15:18:18
Thanks, added a TODO.
Sigurður Ásgeirsson
2016/09/01 15:18:18
Done.
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50 } | |
42 | 51 |
43 } // namespace | 52 } // namespace |
44 | 53 |
45 const AllocatorDispatch AllocatorDispatch::default_dispatch = { | 54 const AllocatorDispatch AllocatorDispatch::default_dispatch = { |
46 &GlibcMalloc, /* alloc_function */ | 55 &GlibcMalloc, /* alloc_function */ |
47 &GlibcCalloc, /* alloc_zero_initialized_function */ | 56 &GlibcCalloc, /* alloc_zero_initialized_function */ |
48 &GlibcMemalign, /* alloc_aligned_function */ | 57 &GlibcMemalign, /* alloc_aligned_function */ |
49 &GlibcRealloc, /* realloc_function */ | 58 &GlibcRealloc, /* realloc_function */ |
50 &GlibcFree, /* free_function */ | 59 &GlibcFree, /* free_function */ |
51 nullptr, /* next */ | 60 &GlibcGetSizeEstimate, /* get_size_estimate_function */ |
61 nullptr, /* next */ | |
52 }; | 62 }; |
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