// 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 #include "base/allocator/allocator_shim.h" #include "build/build_config.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*); size_t __real_malloc_usable_size(void*); } // extern "C" namespace { using base::allocator::AllocatorDispatch; void* RealMalloc(const AllocatorDispatch*, size_t size, void* context) { return __real_malloc(size); } void* RealCalloc(const AllocatorDispatch*, size_t n, size_t size, void* context) { return __real_calloc(n, size); } void* RealRealloc(const AllocatorDispatch*, void* address, size_t size, void* context) { return __real_realloc(address, size); } void* RealMemalign(const AllocatorDispatch*, size_t alignment, size_t size, void* context) { return __real_memalign(alignment, size); } void RealFree(const AllocatorDispatch*, void* address, void* context) { __real_free(address); } size_t RealSizeEstimate(const AllocatorDispatch*, void* address, void* context) { return __real_malloc_usable_size(address); } } // namespace const AllocatorDispatch AllocatorDispatch::default_dispatch = { &RealMalloc, /* alloc_function */ &RealMalloc, /* alloc_unchecked_function */ &RealCalloc, /* alloc_zero_initialized_function */ &RealMemalign, /* alloc_aligned_function */ &RealRealloc, /* realloc_function */ &RealFree, /* free_function */ &RealSizeEstimate, /* get_size_estimate_function */ nullptr, /* batch_malloc_function */ nullptr, /* batch_free_function */ nullptr, /* free_definite_size_function */ nullptr, /* aligned_malloc_function */ nullptr, /* aligned_realloc_function */ nullptr, /* aligned_free_function */ nullptr, /* next */ };