blob: 7955cb7877001e7c6a7a73ea4505f5aa24c24f6b [file] [log] [blame]
// 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
// 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) {
} // 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 */