7a3681e5b6
This library is used by a number of different libraries in the system. Make it easy for platform libraries to use this library and create an actual exported include file. Change the names of the functions to reflect the new name of the library. Run clang_format on the async_safe_log.cpp file since the formatting is all over the place. Bug: 31919199 Test: Compiled for angler/bullhead, and booted. Test: Ran bionic unit tests. Test: Ran the malloc debug tests. Change-Id: I8071bf690c17b0ea3bc8dc5749cdd5b6ad58478a
85 lines
2.7 KiB
C++
85 lines
2.7 KiB
C++
/*
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* Copyright (C) 2015 The Android Open Source Project
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
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* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include "linker_allocator.h"
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#include <stdlib.h>
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#include <sys/cdefs.h>
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#include <unistd.h>
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#include <async_safe/log.h>
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static LinkerMemoryAllocator g_linker_allocator;
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static pid_t fallback_tid = 0;
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// Used by libdebuggerd_handler to switch allocators during a crash dump, in
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// case the linker heap is corrupted. Do not use this function.
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extern "C" void __linker_enable_fallback_allocator() {
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if (fallback_tid != 0) {
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async_safe_fatal("attempted to use currently-in-use fallback allocator");
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}
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fallback_tid = gettid();
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}
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extern "C" void __linker_disable_fallback_allocator() {
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if (fallback_tid == 0) {
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async_safe_fatal("attempted to disable unused fallback allocator");
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}
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fallback_tid = 0;
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}
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static LinkerMemoryAllocator& get_fallback_allocator() {
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static LinkerMemoryAllocator fallback_allocator;
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return fallback_allocator;
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}
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static LinkerMemoryAllocator& get_allocator() {
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if (__predict_false(fallback_tid) && __predict_false(gettid() == fallback_tid)) {
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return get_fallback_allocator();
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}
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return g_linker_allocator;
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}
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void* malloc(size_t byte_count) {
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return get_allocator().alloc(byte_count);
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}
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void* calloc(size_t item_count, size_t item_size) {
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return get_allocator().alloc(item_count*item_size);
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}
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void* realloc(void* p, size_t byte_count) {
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return get_allocator().realloc(p, byte_count);
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}
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void free(void* ptr) {
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get_allocator().free(ptr);
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}
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