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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.
#include "base/allocator/allocator_shim.h"
#include <malloc.h>
// This translation unit defines a default dispatch for the allocator shim which
// routes allocations to libc functions.
// The code here is strongly inspired from tcmalloc's libc_override_glibc.h.
extern "C" {
void* __libc_malloc(size_t size);
void* __libc_calloc(size_t n, size_t size);
void* __libc_realloc(void* address, size_t size);
void* __libc_memalign(size_t alignment, size_t size);
void __libc_free(void* ptr);
} // extern "C"
namespace {
using base::allocator::AllocatorDispatch;
void* GlibcMalloc(const AllocatorDispatch*, size_t size, void* context) {
return __libc_malloc(size);
}
void* GlibcCalloc(const AllocatorDispatch*,
size_t n,
size_t size,
void* context) {
return __libc_calloc(n, size);
}
void* GlibcRealloc(const AllocatorDispatch*,
void* address,
size_t size,
void* context) {
return __libc_realloc(address, size);
}
void* GlibcMemalign(const AllocatorDispatch*,
size_t alignment,
size_t size,
void* context) {
return __libc_memalign(alignment, size);
}
void GlibcFree(const AllocatorDispatch*, void* address, void* context) {
__libc_free(address);
}
size_t GlibcGetSizeEstimate(const AllocatorDispatch*,
void* address,
void* context) {
// TODO(siggi, primiano): malloc_usable_size may need redirection in the
// presence of interposing shims that divert allocations.
return malloc_usable_size(address);
}
} // namespace
const AllocatorDispatch AllocatorDispatch::default_dispatch = {
&GlibcMalloc, /* alloc_function */
&GlibcCalloc, /* alloc_zero_initialized_function */
&GlibcMemalign, /* alloc_aligned_function */
&GlibcRealloc, /* realloc_function */
&GlibcFree, /* free_function */
&GlibcGetSizeEstimate, /* get_size_estimate_function */
nullptr, /* batch_malloc_function */
nullptr, /* batch_free_function */
nullptr, /* free_definite_size_function */
nullptr, /* next */
};
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