56 lines
2.1 KiB
C
56 lines
2.1 KiB
C
/*
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* Copyright (C) 2012 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "dlmalloc.h"
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#include "private/bionic_prctl.h"
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#include "private/libc_logging.h"
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// Send dlmalloc errors to the log.
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static void __bionic_heap_corruption_error(const char* function);
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static void __bionic_heap_usage_error(const char* function, void* address);
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#define PROCEED_ON_ERROR 0
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#define CORRUPTION_ERROR_ACTION(m) __bionic_heap_corruption_error(__FUNCTION__)
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#define USAGE_ERROR_ACTION(m,p) __bionic_heap_usage_error(__FUNCTION__, p)
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// Bionic named anonymous memory declarations.
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static void* named_anonymous_mmap(size_t length);
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#define MMAP(s) named_anonymous_mmap(s)
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#define DIRECT_MMAP(s) named_anonymous_mmap(s)
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// Ugly inclusion of C file so that bionic specific #defines configure dlmalloc.
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#include "../upstream-dlmalloc/malloc.c"
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static void __bionic_heap_corruption_error(const char* function) {
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__libc_fatal("heap corruption detected by %s", function);
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}
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static void __bionic_heap_usage_error(const char* function, void* address) {
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__libc_fatal_no_abort("invalid address or address of corrupt block %p passed to %s",
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address, function);
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// So that debuggerd gives us a memory dump around the specific address.
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// TODO: improve the debuggerd protocol so we can tell it to dump an address when we abort.
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*((int**) 0xdeadbaad) = (int*) address;
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}
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static void* named_anonymous_mmap(size_t length) {
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void* map = mmap(NULL, length, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0);
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if (map == MAP_FAILED) {
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return map;
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}
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prctl(PR_SET_VMA, PR_SET_VMA_ANON_NAME, map, length, "libc_malloc");
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return map;
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}
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