xf.li | bdd93d5 | 2023-05-12 07:10:14 -0700 | [diff] [blame] | 1 | /* Check that error checking mutexes are not subject to lock elision. |
| 2 | Copyright (C) 2016 Free Software Foundation, Inc. |
| 3 | This file is part of the GNU C Library. |
| 4 | |
| 5 | The GNU C Library is free software; you can redistribute it and/or |
| 6 | modify it under the terms of the GNU Lesser General Public |
| 7 | License as published by the Free Software Foundation; either |
| 8 | version 2.1 of the License, or (at your option) any later version. |
| 9 | |
| 10 | The GNU C Library is distributed in the hope that it will be useful, |
| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 13 | Lesser General Public License for more details. |
| 14 | |
| 15 | You should have received a copy of the GNU Lesser General Public |
| 16 | License along with the GNU C Library; if not, see |
| 17 | <http://www.gnu.org/licenses/>. */ |
| 18 | |
| 19 | #include <stdio.h> |
| 20 | #include <errno.h> |
| 21 | #include <time.h> |
| 22 | #include <pthread.h> |
| 23 | |
| 24 | static int |
| 25 | do_test (void) |
| 26 | { |
| 27 | struct timespec tms = { 0 }; |
| 28 | pthread_mutex_t mutex; |
| 29 | pthread_mutexattr_t mutexattr; |
| 30 | int ret = 0; |
| 31 | |
| 32 | if (pthread_mutexattr_init (&mutexattr) != 0) |
| 33 | return 1; |
| 34 | if (pthread_mutexattr_settype (&mutexattr, PTHREAD_MUTEX_ERRORCHECK) != 0) |
| 35 | return 1; |
| 36 | |
| 37 | if (pthread_mutex_init (&mutex, &mutexattr) != 0) |
| 38 | return 1; |
| 39 | if (pthread_mutexattr_destroy (&mutexattr) != 0) |
| 40 | return 1; |
| 41 | |
| 42 | /* The call to pthread_mutex_timedlock erroneously enabled lock elision |
| 43 | on the mutex, which then triggered an assertion failure in |
| 44 | pthread_mutex_unlock. It would also defeat the error checking nature |
| 45 | of the mutex. */ |
| 46 | if (pthread_mutex_timedlock (&mutex, &tms) != 0) |
| 47 | return 1; |
| 48 | if (pthread_mutex_timedlock (&mutex, &tms) != EDEADLK) |
| 49 | { |
| 50 | printf ("Failed error checking on locked mutex\n"); |
| 51 | ret = 1; |
| 52 | } |
| 53 | |
| 54 | if (pthread_mutex_unlock (&mutex) != 0) |
| 55 | ret = 1; |
| 56 | |
| 57 | return ret; |
| 58 | } |
| 59 | |
| 60 | #define TEST_FUNCTION do_test () |
| 61 | #include "../test-skeleton.c" |