10ec9286ae
libc_logging is getting statically linked into the crash handler library, resulting in two copies of the abort message code existing in processes, one in the linker, and one in the crash handler. Move android_set_abort_message to its own file to solve this. Bug: http://b/36862204 Test: /data/nativetest/debuggerd_test/debuggerd_test32 Change-Id: Ie198c5a3bb07645aa43296915c9a6752693f14a9
69 lines
2.4 KiB
C++
69 lines
2.4 KiB
C++
/*
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* Copyright (C) 2017 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 <android/set_abort_message.h>
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#include <pthread.h>
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#include <sys/mman.h>
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#include "private/ScopedPthreadMutexLocker.h"
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static pthread_mutex_t g_abort_msg_lock = PTHREAD_MUTEX_INITIALIZER;
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struct abort_msg_t {
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size_t size;
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char msg[0];
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};
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abort_msg_t** __abort_message_ptr; // Accessible to __libc_init_common.
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void android_set_abort_message(const char* msg) {
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ScopedPthreadMutexLocker locker(&g_abort_msg_lock);
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if (__abort_message_ptr == nullptr) {
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// We must have crashed _very_ early.
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return;
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}
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if (*__abort_message_ptr != nullptr) {
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// We already have an abort message.
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// Assume that the first crash is the one most worth reporting.
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return;
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}
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size_t size = sizeof(abort_msg_t) + strlen(msg) + 1;
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void* map = mmap(nullptr, size, PROT_READ | PROT_WRITE, MAP_ANON | MAP_PRIVATE, -1, 0);
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if (map == MAP_FAILED) {
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return;
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}
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abort_msg_t* new_abort_message = reinterpret_cast<abort_msg_t*>(map);
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new_abort_message->size = size;
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strcpy(new_abort_message->msg, msg);
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*__abort_message_ptr = new_abort_message;
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}
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