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152 lines
4.6 KiB
C
152 lines
4.6 KiB
C
/* Helper program for testing the pthread_mutex_t pretty printer.
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Copyright (C) 2016-2017 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<http://www.gnu.org/licenses/>. */
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/* Keep the calls to the pthread_* functions on separate lines to make it easy
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to advance through the program using the gdb 'next' command. */
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#include <stdlib.h>
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#include <errno.h>
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#include <pthread.h>
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#define PASS 0
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#define FAIL 1
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static int test_status_destroyed (pthread_mutex_t *mutex);
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static int test_status_no_robust (pthread_mutex_t *mutex,
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pthread_mutexattr_t *attr);
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static int test_status_robust (pthread_mutex_t *mutex,
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pthread_mutexattr_t *attr);
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static int test_locking_state_robust (pthread_mutex_t *mutex);
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static void *thread_func (void *arg);
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static int test_recursive_locks (pthread_mutex_t *mutex,
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pthread_mutexattr_t *attr);
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int
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main (void)
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{
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pthread_mutex_t mutex;
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pthread_mutexattr_t attr;
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int result = FAIL;
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if (pthread_mutexattr_init (&attr) == 0
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&& test_status_destroyed (&mutex) == PASS
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&& test_status_no_robust (&mutex, &attr) == PASS
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&& test_status_robust (&mutex, &attr) == PASS
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&& test_recursive_locks (&mutex, &attr) == PASS)
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result = PASS;
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/* Else, one of the pthread_mutex* functions failed. */
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return result;
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}
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/* Initializes MUTEX, then destroys it. */
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static int
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test_status_destroyed (pthread_mutex_t *mutex)
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{
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int result = FAIL;
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if (pthread_mutex_init (mutex, NULL) == 0
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&& pthread_mutex_destroy (mutex) == 0)
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result = PASS; /* Test status (destroyed). */
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return result;
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}
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/* Tests locking of non-robust mutexes. */
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static int
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test_status_no_robust (pthread_mutex_t *mutex, pthread_mutexattr_t *attr)
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{
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int result = FAIL;
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if (pthread_mutexattr_setrobust (attr, PTHREAD_MUTEX_STALLED) == 0
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&& pthread_mutex_init (mutex, attr) == 0
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&& pthread_mutex_lock (mutex) == 0 /* Test status (non-robust). */
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&& pthread_mutex_unlock (mutex) == 0
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&& pthread_mutex_destroy (mutex) == 0)
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result = PASS;
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return result;
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}
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/* Tests locking of robust mutexes. */
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static int
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test_status_robust (pthread_mutex_t *mutex, pthread_mutexattr_t *attr)
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{
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int result = FAIL;
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if (pthread_mutexattr_setrobust (attr, PTHREAD_MUTEX_ROBUST) == 0
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&& pthread_mutex_init (mutex, attr) == 0
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&& test_locking_state_robust (mutex) == PASS /* Test status (robust). */
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&& pthread_mutex_destroy (mutex) == 0)
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result = PASS;
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return result;
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}
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/* Tests locking and state corruption of robust mutexes. We'll mark it as
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inconsistent, then not recoverable. */
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static int
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test_locking_state_robust (pthread_mutex_t *mutex)
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{
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int result = FAIL;
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pthread_t thread;
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if (pthread_create (&thread, NULL, thread_func, mutex) == 0 /* Create. */
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&& pthread_join (thread, NULL) == 0
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&& pthread_mutex_lock (mutex) == EOWNERDEAD /* Test locking (robust). */
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&& pthread_mutex_unlock (mutex) == 0)
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result = PASS;
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return result;
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}
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/* Function to be called by the child thread when testing robust mutexes. */
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static void *
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thread_func (void *arg)
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{
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pthread_mutex_t *mutex = (pthread_mutex_t *)arg;
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if (pthread_mutex_lock (mutex) != 0) /* Thread function. */
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exit (FAIL);
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/* Thread terminates without unlocking the mutex, thus marking it as
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inconsistent. */
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return NULL;
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}
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/* Tests locking the mutex multiple times in a row. */
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static int
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test_recursive_locks (pthread_mutex_t *mutex, pthread_mutexattr_t *attr)
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{
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int result = FAIL;
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if (pthread_mutexattr_settype (attr, PTHREAD_MUTEX_RECURSIVE) == 0
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&& pthread_mutex_init (mutex, attr) == 0
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&& pthread_mutex_lock (mutex) == 0
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&& pthread_mutex_lock (mutex) == 0
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&& pthread_mutex_lock (mutex) == 0 /* Test recursive locks. */
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&& pthread_mutex_unlock (mutex) == 0
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&& pthread_mutex_unlock (mutex) == 0
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&& pthread_mutex_unlock (mutex) == 0
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&& pthread_mutex_destroy (mutex) == 0)
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result = PASS;
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return result;
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}
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