bionic/libc/private/libc_events.h

/*
 * Copyright (C) 2013 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.
 */

#ifndef _LIBC_EVENTS_H
#define _LIBC_EVENTS_H


// This is going to be included in assembler code so only allow #define
// values instead of defining an enum.

#define BIONIC_EVENT_MEMCPY_BUFFER_OVERFLOW   80100
#define BIONIC_EVENT_STRCAT_BUFFER_OVERFLOW   80105
#define BIONIC_EVENT_MEMMOVE_BUFFER_OVERFLOW  80110
#define BIONIC_EVENT_STRNCAT_BUFFER_OVERFLOW  80115
#define BIONIC_EVENT_STRNCPY_BUFFER_OVERFLOW  80120
#define BIONIC_EVENT_MEMSET_BUFFER_OVERFLOW   80125
#define BIONIC_EVENT_STRCPY_BUFFER_OVERFLOW   80130

#define BIONIC_EVENT_RESOLVER_OLD_RESPONSE    80300
#define BIONIC_EVENT_RESOLVER_WRONG_SERVER    80305
#define BIONIC_EVENT_RESOLVER_WRONG_QUERY     80310

#endif // _LIBC_EVENTS_H
Optimize __memset_chk, __memcpy_chk. This change creates assembler versions of __memcpy_chk/__memset_chk that is implemented in the memcpy/memset assembler code. This change avoids an extra call to memcpy/memset, instead allowing a simple fall through to occur from the chk code into the body of the real implementation. Testing: - Ran the libc_test on __memcpy_chk/__memset_chk on all nexus devices. - Wrote a small test executable that has three calls to __memcpy_chk and three calls to __memset_chk. First call dest_len is length + 1. Second call dest_len is length. Third call dest_len is length - 1. Verified that the first two calls pass, and the third fails. Examined the logcat output on all nexus devices to verify that the fortify error message was sent properly. - I benchmarked the new __memcpy_chk and __memset_chk on all systems. For __memcpy_chk and large copies, the savings is relatively small (about 1%). For small copies, the savings is large on cortex-a15/krait devices (between 5% to 30%). For cortex-a9 and small copies, the speed up is present, but relatively small (about 3% to 5%). For __memset_chk and large copies, the savings is also small (about 1%). However, all processors show larger speed-ups on small copies (about 30% to 100%). Bug: 9293744 Change-Id: I8926d59fe2673e36e8a27629e02a7b7059ebbc98 2013-08-01 22:13:33 +02:00			`/*`
			`* Copyright (C) 2013 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.`
			`*/`

			`#ifndef _LIBC_EVENTS_H`
			`#define _LIBC_EVENTS_H`


			`// This is going to be included in assembler code so only allow #define`
			`// values instead of defining an enum.`

			`#define BIONIC_EVENT_MEMCPY_BUFFER_OVERFLOW 80100`
			`#define BIONIC_EVENT_STRCAT_BUFFER_OVERFLOW 80105`
			`#define BIONIC_EVENT_MEMMOVE_BUFFER_OVERFLOW 80110`
			`#define BIONIC_EVENT_STRNCAT_BUFFER_OVERFLOW 80115`
			`#define BIONIC_EVENT_STRNCPY_BUFFER_OVERFLOW 80120`
			`#define BIONIC_EVENT_MEMSET_BUFFER_OVERFLOW 80125`
			`#define BIONIC_EVENT_STRCPY_BUFFER_OVERFLOW 80130`

			`#define BIONIC_EVENT_RESOLVER_OLD_RESPONSE 80300`
			`#define BIONIC_EVENT_RESOLVER_WRONG_SERVER 80305`
			`#define BIONIC_EVENT_RESOLVER_WRONG_QUERY 80310`

			`#endif // _LIBC_EVENTS_H`