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authorUlrich Drepper <drepper@redhat.com>2003-06-05 19:20:54 +0000
committerUlrich Drepper <drepper@redhat.com>2003-06-05 19:20:54 +0000
commitb558fd3ab7b8d9d98b7babc51da7de109f69a77e (patch)
tree63eb3a83ccd3515054b950790ca3d83a6b6cf1a6
parent332faa962723e22790ed7e1b0e7850c5bb6d1f61 (diff)
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Test for inter-process rwlocks.
-rw-r--r--nptl/tst-rwlock12.c216
1 files changed, 216 insertions, 0 deletions
diff --git a/nptl/tst-rwlock12.c b/nptl/tst-rwlock12.c
new file mode 100644
index 0000000000..159d469afc
--- /dev/null
+++ b/nptl/tst-rwlock12.c
@@ -0,0 +1,216 @@
+/* Copyright (C) 2002, 2003 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+ Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
+
+ 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 <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <sys/mman.h>
+#include <sys/wait.h>
+
+
+static int
+do_test (void)
+{
+#if ! _POSIX_THREAD_PROCESS_SHARED
+
+ puts ("_POSIX_THREAD_PROCESS_SHARED not supported, test skipped");
+ return 0;
+
+#else
+
+ size_t ps = sysconf (_SC_PAGESIZE);
+ char tmpfname[] = "/tmp/tst-rwlock12.XXXXXX";
+ char data[ps];
+ void *mem;
+ int fd;
+ pthread_mutex_t *m;
+ pthread_mutexattr_t ma;
+ pthread_rwlock_t *r;
+ pthread_rwlockattr_t ra;
+ pid_t pid;
+ int status = 0;
+
+ 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;
+ }
+
+ r = (pthread_rwlock_t *) (((uintptr_t) mem + __alignof (pthread_rwlock_t))
+ & ~(__alignof (pthread_rwlock_t) - 1));
+ /* The following assumes alignment for a mutex is at least as high
+ as that for a rwlock. Which is true in our case. */
+ m = (pthread_mutex_t *) (r + 1);
+
+ if (pthread_rwlockattr_init (&ra) != 0)
+ {
+ puts ("rwlockattr_init failed");
+ return 1;
+ }
+
+ if (pthread_rwlockattr_setpshared (&ra, PTHREAD_PROCESS_SHARED) != 0)
+ {
+ puts ("rwlockattr_setpshared failed");
+ return 1;
+ }
+
+ if (pthread_rwlock_init (r, &ra) != 0)
+ {
+ puts ("rwlock_init failed");
+ return 1;
+ }
+
+ if (pthread_mutexattr_init (&ma) != 0)
+ {
+ puts ("rwlockattr_init failed");
+ return 1;
+ }
+
+ if (pthread_mutexattr_setpshared (&ma, PTHREAD_PROCESS_SHARED) != 0)
+ {
+ puts ("mutexattr_setpshared failed");
+ return 1;
+ }
+
+ if (pthread_mutex_init (m, &ma) != 0)
+ {
+ puts ("mutex_init failed");
+ return 1;
+ }
+
+ /* Lock the mutex. */
+ if (pthread_mutex_lock (m) != 0)
+ {
+ puts ("mutex_lock failed");
+ return 1;
+ }
+
+ puts ("going to fork now");
+ pid = fork ();
+ if (pid == -1)
+ {
+ puts ("fork failed");
+ return 1;
+ }
+ else if (pid == 0)
+ {
+ /* Lock the mutex. */
+ if (pthread_mutex_lock (m) != 0)
+ {
+ puts ("child: mutex_lock failed");
+ return 1;
+ }
+
+ /* Try to get the rwlock. */
+ if (pthread_rwlock_trywrlock (r) == 0)
+ {
+ puts ("rwlock_trywrlock succeeded");
+ return 1;
+ }
+
+ /* Try again. */
+ struct timespec ts = { .tv_sec = 0, .tv_nsec = 500000000 };
+ int e = pthread_rwlock_timedwrlock (r, &ts);
+ if (e == 0)
+ {
+ puts ("rwlock_timedwrlock succeeded");
+ return 1;
+ }
+ if (e != ETIMEDOUT)
+ {
+ puts ("rwlock_timedwrlock didn't return ETIMEDOUT");
+ status = 1;
+ }
+
+ if (pthread_rwlock_tryrdlock (r) == 0)
+ {
+ puts ("rwlock_tryrdlock succeeded");
+ return 1;
+ }
+
+ e = pthread_rwlock_timedrdlock (r, &ts);
+ if (e == 0)
+ {
+ puts ("rwlock_timedrdlock succeeded");
+ return 1;
+ }
+ if (e != ETIMEDOUT)
+ {
+ puts ("rwlock_timedrdlock didn't return ETIMEDOUT");
+ status = 1;
+ }
+ }
+ else
+ {
+ /* Lock the rwlock for writing. */
+ if (pthread_rwlock_wrlock (r) != 0)
+ {
+ puts ("rwlock_wrlock failed");
+ kill (pid, SIGTERM);
+ return 1;
+ }
+
+ /* Allow the child to run. */
+ if (pthread_mutex_unlock (m) != 0)
+ {
+ puts ("mutex_unlock failed");
+ kill (pid, SIGTERM);
+ return 1;
+ }
+
+ /* Just wait for the child. */
+ if (TEMP_FAILURE_RETRY (waitpid (pid, &status, 0)) != pid)
+ {
+ puts ("waitpid failed");
+ kill (pid, SIGTERM);
+ return 1;
+ }
+ }
+
+ return status;
+#endif
+}
+
+#define TEST_FUNCTION do_test ()
+#include "../test-skeleton.c"