// Copyright 2016 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#include "base/allocator/allocator_shim.h"
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#include <malloc.h>
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// This translation unit defines a default dispatch for the allocator shim which
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// routes allocations to libc functions.
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// The code here is strongly inspired from tcmalloc's libc_override_glibc.h.
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extern "C" {
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void* __libc_malloc(size_t size);
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void* __libc_calloc(size_t n, size_t size);
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void* __libc_realloc(void* address, size_t size);
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void* __libc_memalign(size_t alignment, size_t size);
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void __libc_free(void* ptr);
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} // extern "C"
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namespace {
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using base::allocator::AllocatorDispatch;
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void* GlibcMalloc(const AllocatorDispatch*, size_t size, void* context) {
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return __libc_malloc(size);
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}
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void* GlibcCalloc(const AllocatorDispatch*,
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size_t n,
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size_t size,
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void* context) {
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return __libc_calloc(n, size);
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}
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void* GlibcRealloc(const AllocatorDispatch*,
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void* address,
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size_t size,
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void* context) {
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return __libc_realloc(address, size);
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}
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void* GlibcMemalign(const AllocatorDispatch*,
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size_t alignment,
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size_t size,
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void* context) {
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return __libc_memalign(alignment, size);
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}
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void GlibcFree(const AllocatorDispatch*, void* address, void* context) {
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__libc_free(address);
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}
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size_t GlibcGetSizeEstimate(const AllocatorDispatch*,
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void* address,
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void* context) {
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// TODO(siggi, primiano): malloc_usable_size may need redirection in the
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// presence of interposing shims that divert allocations.
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return malloc_usable_size(address);
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}
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} // namespace
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const AllocatorDispatch AllocatorDispatch::default_dispatch = {
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&GlibcMalloc, /* alloc_function */
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&GlibcCalloc, /* alloc_zero_initialized_function */
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&GlibcMemalign, /* alloc_aligned_function */
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&GlibcRealloc, /* realloc_function */
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&GlibcFree, /* free_function */
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&GlibcGetSizeEstimate, /* get_size_estimate_function */
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nullptr, /* batch_malloc_function */
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nullptr, /* batch_free_function */
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nullptr, /* free_definite_size_function */
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nullptr, /* next */
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};
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