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Diffstat (limited to 'sysdeps/pthread/tst-mutex9.c')
| -rw-r--r-- | sysdeps/pthread/tst-mutex9.c | 140 |
1 files changed, 140 insertions, 0 deletions
diff --git a/sysdeps/pthread/tst-mutex9.c b/sysdeps/pthread/tst-mutex9.c new file mode 100644 index 0000000000..2d7927b7c2 --- /dev/null +++ b/sysdeps/pthread/tst-mutex9.c @@ -0,0 +1,140 @@ +/* Copyright (C) 2003-2020 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, see + <https://www.gnu.org/licenses/>. */ + +#include <errno.h> +#include <pthread.h> +#include <stdint.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <unistd.h> +#include <sys/mman.h> +#include <sys/time.h> +#include <sys/wait.h> +#include <support/check.h> +#include <support/timespec.h> +#include <support/xunistd.h> + + +/* A bogus clock value that tells run_test to use pthread_mutex_timedlock + rather than pthread_mutex_clocklock. */ +#define CLOCK_USE_TIMEDLOCK (-1) + +static void +do_test_clock (clockid_t clockid) +{ + const clockid_t clockid_for_get = + (clockid == CLOCK_USE_TIMEDLOCK) ? CLOCK_REALTIME : clockid; + 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; + + fd = mkstemp (tmpfname); + if (fd == -1) + FAIL_EXIT1 ("cannot open temporary file: %m\n"); + + /* Make sure it is always removed. */ + unlink (tmpfname); + + /* Create one page of data. */ + memset (data, '\0', ps); + + /* Write the data to the file. */ + xwrite (fd, data, ps); + + mem = xmmap (NULL, ps, PROT_READ | PROT_WRITE, MAP_SHARED, fd); + + m = (pthread_mutex_t *) (((uintptr_t) mem + __alignof (pthread_mutex_t)) + & ~(__alignof (pthread_mutex_t) - 1)); + + TEST_COMPARE (pthread_mutexattr_init (&a), 0); + + TEST_COMPARE (pthread_mutexattr_setpshared (&a, PTHREAD_PROCESS_SHARED), 0); + + TEST_COMPARE (pthread_mutexattr_settype (&a, PTHREAD_MUTEX_RECURSIVE), 0); + +#ifdef ENABLE_PI + TEST_COMPARE (pthread_mutexattr_setprotocol (&a, PTHREAD_PRIO_INHERIT), 0); +#endif + + int e; + if ((e = pthread_mutex_init (m, &a)) != 0) + { +#ifdef ENABLE_PI + if (e == ENOTSUP) + FAIL_UNSUPPORTED ("PI mutexes unsupported"); +#endif + FAIL_EXIT1 ("mutex_init failed"); + } + + TEST_COMPARE (pthread_mutex_lock (m), 0); + + TEST_COMPARE (pthread_mutexattr_destroy (&a), 0); + + puts ("going to fork now"); + pid = xfork (); + if (pid == 0) + { + if (pthread_mutex_trylock (m) == 0) + FAIL_EXIT1 ("child: mutex_trylock succeeded"); + + if (pthread_mutex_unlock (m) == 0) + FAIL_EXIT1 ("child: mutex_unlock succeeded"); + + const struct timespec ts = timespec_add (xclock_now (clockid_for_get), + make_timespec (0, 500000000)); + + if (clockid == CLOCK_USE_TIMEDLOCK) + TEST_COMPARE (pthread_mutex_timedlock (m, &ts), ETIMEDOUT); + else + TEST_COMPARE (pthread_mutex_clocklock (m, clockid, &ts), ETIMEDOUT); + + 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) + FAIL_EXIT1 ("waitpid failed"); + if (! WIFSIGNALED (status)) + FAIL_EXIT1 ("child not killed by signal"); + TEST_COMPARE (WTERMSIG (status), SIGALRM); +} + +static int +do_test (void) +{ + do_test_clock (CLOCK_USE_TIMEDLOCK); + do_test_clock (CLOCK_REALTIME); + do_test_clock (CLOCK_MONOTONIC); + return 0; +} + +#include <support/test-driver.c> |