2004-10-04 22:51:25 +02:00
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/* Copyright (C) 2003, 2004 Free Software Foundation, Inc.
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2003-06-23 01:55:27 +02:00
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This file is part of the GNU C Library.
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Contributed by Ulrich Drepper <drepper@redhat.com>, 2003.
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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, write to the Free
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Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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02111-1307 USA. */
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#include <errno.h>
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#include <pthread.h>
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#include <stdio.h>
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#include <string.h>
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#include <unistd.h>
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#include <sys/mman.h>
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#include <sys/wait.h>
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static int
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do_test (void)
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{
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size_t ps = sysconf (_SC_PAGESIZE);
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char tmpfname[] = "/tmp/tst-mutex9.XXXXXX";
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char data[ps];
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void *mem;
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int fd;
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pthread_mutex_t *m;
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pthread_mutexattr_t a;
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pid_t pid;
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char *p;
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fd = mkstemp (tmpfname);
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if (fd == -1)
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{
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printf ("cannot open temporary file: %m\n");
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return 1;
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}
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/* Make sure it is always removed. */
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unlink (tmpfname);
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/* Create one page of data. */
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memset (data, '\0', ps);
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/* Write the data to the file. */
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if (write (fd, data, ps) != (ssize_t) ps)
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{
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puts ("short write");
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return 1;
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}
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mem = mmap (NULL, ps, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0);
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if (mem == MAP_FAILED)
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{
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printf ("mmap failed: %m\n");
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return 1;
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}
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m = (pthread_mutex_t *) (((uintptr_t) mem + __alignof (pthread_mutex_t))
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& ~(__alignof (pthread_mutex_t) - 1));
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p = (char *) (m + 1);
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if (pthread_mutexattr_init (&a) != 0)
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{
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puts ("mutexattr_init failed");
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return 1;
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}
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if (pthread_mutexattr_setpshared (&a, PTHREAD_PROCESS_SHARED) != 0)
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{
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puts ("mutexattr_setpshared failed");
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return 1;
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}
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if (pthread_mutexattr_settype (&a, PTHREAD_MUTEX_RECURSIVE) != 0)
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{
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puts ("mutexattr_settype failed");
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return 1;
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}
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if (pthread_mutex_init (m, &a) != 0)
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{
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puts ("mutex_init failed");
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return 1;
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}
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if (pthread_mutex_lock (m) != 0)
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{
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puts ("mutex_lock failed");
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return 1;
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}
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if (pthread_mutexattr_destroy (&a) != 0)
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{
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puts ("mutexattr_destroy failed");
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return 1;
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}
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puts ("going to fork now");
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pid = fork ();
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if (pid == -1)
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{
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puts ("fork failed");
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return 1;
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}
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else if (pid == 0)
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{
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if (pthread_mutex_trylock (m) == 0)
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{
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puts ("child: mutex_trylock succeeded");
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exit (1);
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}
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if (pthread_mutex_unlock (m) == 0)
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{
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puts ("child: mutex_unlock succeeded");
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exit (1);
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}
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struct timeval tv;
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gettimeofday (&tv, NULL);
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struct timespec ts;
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TIMEVAL_TO_TIMESPEC (&tv, &ts);
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ts.tv_nsec += 500000000;
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if (ts.tv_nsec >= 1000000000)
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{
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++ts.tv_sec;
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ts.tv_nsec -= 1000000000;
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}
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int e = pthread_mutex_timedlock (m, &ts);
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if (e == 0)
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{
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puts ("child: mutex_timedlock succeeded");
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exit (1);
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}
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if (e != ETIMEDOUT)
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{
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puts ("child: mutex_timedlock didn't time out");
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exit (1);
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}
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alarm (1);
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pthread_mutex_lock (m);
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puts ("child: mutex_lock returned");
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exit (0);
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}
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sleep (2);
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int status;
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if (TEMP_FAILURE_RETRY (waitpid (pid, &status, 0)) != pid)
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{
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puts ("waitpid failed");
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return 1;
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}
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if (! WIFSIGNALED (status))
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{
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puts ("child not killed by signal");
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return 1;
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}
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if (WTERMSIG (status) != SIGALRM)
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{
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puts ("child not killed by SIGALRM");
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return 1;
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}
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return 0;
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}
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#define TIMEOUT 3
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#define TEST_FUNCTION do_test ()
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#include "../test-skeleton.c"
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