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- // 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.
- // Its purpose is to preempt the Libc symbols for malloc/new so they call the
- // shim layer entry points.
- #ifdef BASE_ALLOCATOR_ALLOCATOR_SHIM_OVERRIDE_LIBC_SYMBOLS_H_
- #error This header is meant to be included only once by allocator_shim.cc
- #endif
- #define BASE_ALLOCATOR_ALLOCATOR_SHIM_OVERRIDE_LIBC_SYMBOLS_H_
- #include "build/build_config.h"
- #if BUILDFLAG(IS_APPLE)
- #include <malloc/malloc.h>
- #else
- #include <malloc.h>
- #endif
- #include "base/allocator/allocator_shim_internals.h"
- extern "C" {
- // WARNING: Whenever a new function is added there (which, surprisingly enough,
- // happens. For instance glibc 2.33 introduced mallinfo2(), which we don't
- // support... yet?), it MUST be added to build/linux/chrome.map.
- //
- // Otherwise the new symbol is not exported from Chromium's main binary, which
- // is necessary to override libc's weak symbol, which in turn is necessary to
- // intercept calls made by dynamic libraries. See crbug.com/1292206 for such
- // an example.
- SHIM_ALWAYS_EXPORT void* malloc(size_t size) __THROW {
- return ShimMalloc(size, nullptr);
- }
- SHIM_ALWAYS_EXPORT void free(void* ptr) __THROW {
- ShimFree(ptr, nullptr);
- }
- SHIM_ALWAYS_EXPORT void* realloc(void* ptr, size_t size) __THROW {
- return ShimRealloc(ptr, size, nullptr);
- }
- SHIM_ALWAYS_EXPORT void* calloc(size_t n, size_t size) __THROW {
- return ShimCalloc(n, size, nullptr);
- }
- SHIM_ALWAYS_EXPORT void cfree(void* ptr) __THROW {
- ShimFree(ptr, nullptr);
- }
- SHIM_ALWAYS_EXPORT void* memalign(size_t align, size_t s) __THROW {
- return ShimMemalign(align, s, nullptr);
- }
- SHIM_ALWAYS_EXPORT void* aligned_alloc(size_t align, size_t s) __THROW {
- return ShimMemalign(align, s, nullptr);
- }
- SHIM_ALWAYS_EXPORT void* valloc(size_t size) __THROW {
- return ShimValloc(size, nullptr);
- }
- SHIM_ALWAYS_EXPORT void* pvalloc(size_t size) __THROW {
- return ShimPvalloc(size);
- }
- SHIM_ALWAYS_EXPORT int posix_memalign(void** r, size_t a, size_t s) __THROW {
- return ShimPosixMemalign(r, a, s);
- }
- SHIM_ALWAYS_EXPORT size_t malloc_size(const void* address) __THROW {
- return ShimGetSizeEstimate(address, nullptr);
- }
- SHIM_ALWAYS_EXPORT size_t malloc_usable_size(void* address) __THROW {
- return ShimGetSizeEstimate(address, nullptr);
- }
- // The default dispatch translation unit has to define also the following
- // symbols (unless they are ultimately routed to the system symbols):
- // void malloc_stats(void);
- // int mallopt(int, int);
- // struct mallinfo mallinfo(void);
- } // extern "C"
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