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| 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 |
| 3 // found in the LICENSE file. |
| 4 |
| 5 #include "base/allocator/allocator_shim.h" |
| 6 |
| 7 // This translation unit defines a default dispatch for the allocator shim which |
| 8 // routes allocations to libc functions. |
| 9 // The code here is strongly inspired from tcmalloc's libc_override_glibc.h. |
| 10 |
| 11 extern "C" { |
| 12 void* __libc_malloc(size_t size); |
| 13 void* __libc_calloc(size_t n, size_t size); |
| 14 void* __libc_realloc(void* address, size_t size); |
| 15 void* __libc_memalign(size_t alignment, size_t size); |
| 16 void __libc_free(void* ptr); |
| 17 } // extern "C" |
| 18 |
| 19 namespace { |
| 20 |
| 21 using base::allocator::AllocatorDispatch; |
| 22 |
| 23 void* GlibcMalloc(const AllocatorDispatch*, size_t size) { |
| 24 return __libc_malloc(size); |
| 25 } |
| 26 |
| 27 void* GlibcCalloc(const AllocatorDispatch*, size_t n, size_t size) { |
| 28 return __libc_calloc(n, size); |
| 29 } |
| 30 |
| 31 void* GlibcRealloc(const AllocatorDispatch*, void* address, size_t size) { |
| 32 return __libc_realloc(address, size); |
| 33 } |
| 34 |
| 35 void* GlibcMemalign(const AllocatorDispatch*, size_t alignment, size_t size) { |
| 36 return __libc_memalign(alignment, size); |
| 37 } |
| 38 |
| 39 void GlibcFree(const AllocatorDispatch*, void* address) { |
| 40 __libc_free(address); |
| 41 } |
| 42 |
| 43 } // namespace |
| 44 |
| 45 const AllocatorDispatch AllocatorDispatch::default_dispatch = { |
| 46 &GlibcMalloc, /* alloc_function */ |
| 47 &GlibcCalloc, /* alloc_zero_initialized_function */ |
| 48 &GlibcMemalign, /* alloc_aligned_function */ |
| 49 &GlibcRealloc, /* realloc_function */ |
| 50 &GlibcFree, /* free_function */ |
| 51 nullptr, /* next */ |
| 52 }; |
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