/* Copyright (C) 2003, 2004 Free Software Foundation, Inc. This file is part of the GNU C Library. Contributed by Ulrich Drepper <drepper@redhat.com>, 2003. The GNU C Library is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version. The GNU C Library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with the GNU C Library; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. */ #include <errno.h> #include <pthread.h> #include <stdio.h> #include <string.h> #include <unistd.h> #include <sys/mman.h> #include <sys/wait.h> #include <stdint.h> #include <stdlib.h> #include <sys/time.h> int gettimeofday(struct timeval *tv, struct timezone *tz); static int do_test (void) { size_t ps = sysconf (_SC_PAGESIZE); char tmpfname[] = "/tmp/tst-mutex9.XXXXXX"; char data[ps]; void *mem; int fd; pthread_mutex_t *m; pthread_mutexattr_t a; pid_t pid; char *p; fd = mkstemp (tmpfname); if (fd == -1) { printf ("cannot open temporary file: %m\n"); return 1; } /* Make sure it is always removed. */ unlink (tmpfname); /* Create one page of data. */ memset (data, '\0', ps); /* Write the data to the file. */ if (write (fd, data, ps) != (ssize_t) ps) { puts ("short write"); return 1; } mem = mmap (NULL, ps, PROT_READ | PROT_WRITE, MAP_SHARED, fd, 0); if (mem == MAP_FAILED) { printf ("mmap failed: %m\n"); return 1; } m = (pthread_mutex_t *) (((uintptr_t) mem + __alignof (pthread_mutex_t)) & ~(__alignof (pthread_mutex_t) - 1)); p = (char *) (m + 1); if (pthread_mutexattr_init (&a) != 0) { puts ("mutexattr_init failed"); return 1; } if (pthread_mutexattr_setpshared (&a, PTHREAD_PROCESS_SHARED) != 0) { puts ("mutexattr_setpshared failed"); return 1; } if (pthread_mutexattr_settype (&a, PTHREAD_MUTEX_RECURSIVE) != 0) { puts ("mutexattr_settype failed"); return 1; } if (pthread_mutex_init (m, &a) != 0) { puts ("mutex_init failed"); return 1; } if (pthread_mutex_lock (m) != 0) { puts ("mutex_lock failed"); return 1; } if (pthread_mutexattr_destroy (&a) != 0) { puts ("mutexattr_destroy failed"); return 1; } puts ("going to fork now"); pid = fork (); if (pid == -1) { puts ("fork failed"); return 1; } else if (pid == 0) { if (pthread_mutex_trylock (m) == 0) { puts ("child: mutex_trylock succeeded"); exit (1); } if (pthread_mutex_unlock (m) == 0) { puts ("child: mutex_unlock succeeded"); exit (1); } struct timeval tv; gettimeofday (&tv, NULL); struct timespec ts; TIMEVAL_TO_TIMESPEC (&tv, &ts); ts.tv_nsec += 500000000; if (ts.tv_nsec >= 1000000000) { ++ts.tv_sec; ts.tv_nsec -= 1000000000; } int e = pthread_mutex_timedlock (m, &ts); if (e == 0) { puts ("child: mutex_timedlock succeeded"); exit (1); } if (e != ETIMEDOUT) { puts ("child: mutex_timedlock didn't time out"); exit (1); } alarm (1); pthread_mutex_lock (m); puts ("child: mutex_lock returned"); exit (0); } sleep (2); int status; if (TEMP_FAILURE_RETRY (waitpid (pid, &status, 0)) != pid) { puts ("waitpid failed"); return 1; } if (! WIFSIGNALED (status)) { puts ("child not killed by signal"); return 1; } if (WTERMSIG (status) != SIGALRM) { puts ("child not killed by SIGALRM"); return 1; } return 0; } #define TIMEOUT 3 #define TEST_FUNCTION do_test () #include "../test-skeleton.c"