82 lines
2.8 KiB
C++
82 lines
2.8 KiB
C++
/*
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* Copyright (C) 2008 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 <ctype.h>
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#include <fcntl.h>
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#include <signal.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include "bionic_ssp.h"
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#include "logd.h"
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void* __stack_chk_guard = NULL;
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static void __attribute__((constructor)) __init_stack_check_guard() {
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__stack_chk_guard = __generate_stack_chk_guard();
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}
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// This is the crash handler.
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// Does a best effort at logging and calls _exit to terminate
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// the process immediately (without atexit handlers, etc.).
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void __stack_chk_fail() {
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// Immediately block all (but SIGABRT) signal handlers from running code.
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sigset_t sigmask;
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sigfillset(&sigmask);
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sigdelset(&sigmask, SIGABRT);
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sigprocmask(SIG_BLOCK, &sigmask, NULL);
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// Use /proc/self/exe link to obtain the program name for logging
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// purposes. If it's not available, we set it to "<unknown>".
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char path[PATH_MAX];
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int count;
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if ((count = readlink("/proc/self/exe", path, sizeof(path) - 1)) == -1) {
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strlcpy(path, "<unknown>", sizeof(path));
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} else {
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path[count] = '\0';
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}
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// Do a best effort at logging.
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__libc_android_log_write(ANDROID_LOG_FATAL, path, "stack corruption detected: aborted");
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// Make sure there is no default action for SIGABRT.
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struct sigaction sa;
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memset(&sa, 0, sizeof(sa));
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sigemptyset(&sa.sa_mask);
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sa.sa_flags = 0;
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sa.sa_handler = SIG_DFL;
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sigaction(SIGABRT, &sa, NULL);
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// Terminate the process and exit immediately.
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kill(getpid(), SIGABRT);
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_exit(127);
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}
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