/* * Copyright (C) 2012 The Android Open Source Project * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * * Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer. * * Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in * the documentation and/or other materials provided with the * distribution. * * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF * SUCH DAMAGE. */ #undef _FORTIFY_SOURCE #include <string.h> #include <stdlib.h> #include <private/logd.h> /* * Runtime implementation of __memcpy_chk. * * See * http://gcc.gnu.org/onlinedocs/gcc/Object-Size-Checking.html * http://gcc.gnu.org/ml/gcc-patches/2004-09/msg02055.html * for details. * * This memcpy check is called if _FORTIFY_SOURCE is defined and * greater than 0. */ void *__memcpy_chk(void *dest, const void *src, size_t copy_amount, size_t dest_len) { if (__builtin_expect(copy_amount > dest_len, 0)) { __libc_android_log_print(ANDROID_LOG_FATAL, "libc", "*** memcpy buffer overflow detected ***\n"); __libc_android_log_event_uid(BIONIC_EVENT_MEMCPY_BUFFER_OVERFLOW); abort(); } return memcpy(dest, src, copy_amount); }