| // Copyright 2016 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include "base/allocator/allocator_shim.h" |
| |
| // This translation unit defines a default dispatch for the allocator shim which |
| // routes allocations to the original libc functions when using the link-time |
| // -Wl,-wrap,malloc approach (see README.md). |
| // The __real_X functions here are special symbols that the linker will relocate |
| // against the real "X" undefined symbol, so that __real_malloc becomes the |
| // equivalent of what an undefined malloc symbol reference would have been. |
| // This is the counterpart of allocator_shim_override_linker_wrapped_symbols.h, |
| // which routes the __wrap_X functions into the shim. |
| |
| extern "C" { |
| void* __real_malloc(size_t); |
| void* __real_calloc(size_t, size_t); |
| void* __real_realloc(void*, size_t); |
| void* __real_memalign(size_t, size_t); |
| void* __real_free(void*); |
| } // extern "C" |
| |
| namespace { |
| |
| using base::allocator::AllocatorDispatch; |
| |
| void* RealMalloc(const AllocatorDispatch*, size_t size) { |
| return __real_malloc(size); |
| } |
| |
| void* RealCalloc(const AllocatorDispatch*, size_t n, size_t size) { |
| return __real_calloc(n, size); |
| } |
| |
| void* RealRealloc(const AllocatorDispatch*, void* address, size_t size) { |
| return __real_realloc(address, size); |
| } |
| |
| void* RealMemalign(const AllocatorDispatch*, size_t alignment, size_t size) { |
| return __real_memalign(alignment, size); |
| } |
| |
| void RealFree(const AllocatorDispatch*, void* address) { |
| __real_free(address); |
| } |
| |
| } // namespace |
| |
| const AllocatorDispatch AllocatorDispatch::default_dispatch = { |
| &RealMalloc, /* alloc_function */ |
| &RealCalloc, /* alloc_zero_initialized_function */ |
| &RealMemalign, /* alloc_aligned_function */ |
| &RealRealloc, /* realloc_function */ |
| &RealFree, /* free_function */ |
| nullptr, /* next */ |
| }; |