59a13c122e
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
Merge from internal master.
(cherry-picked from 7c860db074)
Change-Id: I916ad305e4001269460ca6ebd38aaa0be8ac7f52
49 lines
2.1 KiB
C
49 lines
2.1 KiB
C
/*
|
|
* 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
|