1 files changed, 304 insertions, 0 deletions
diff --git a/lib/libkse/test/sigwait_d.c b/lib/libkse/test/sigwait_d.c
new file mode 100644
index 0000000..f3ccd6b
--- /dev/null
+++ b/lib/libkse/test/sigwait_d.c
@@ -0,0 +1,304 @@
+/*
+ * Copyright (c) 1998 Daniel M. Eischen <eischen@vigrid.com>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by Daniel M. Eischen.
+ * 4. Neither the name of the author nor the names of any co-contributors
+ *    may be used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY DANIEL M. EISCHEN AND CONTRIBUTORS ``AS IS''
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ *
+ * $FreeBSD$
+ */
+#include <stdlib.h>
+#include <unistd.h>
+
+#include <errno.h>
+#include <pthread.h>
+#include <signal.h>
+#include <stdio.h>
+#include <string.h>
+
+#if defined(_LIBC_R_)
+#include <pthread_np.h>
+#endif
+
+static int		sigcounts[NSIG + 1];
+static sigset_t		wait_mask;
+static pthread_mutex_t	waiter_mutex;
+
+
+static void *
+sigwaiter (void *arg)
+{
+	int signo;
+	sigset_t mask;
+
+	/* Block SIGHUP */
+	sigemptyset (&mask);
+	sigaddset (&mask, SIGHUP);
+	sigprocmask (SIG_BLOCK, &mask, NULL);
+
+	while (sigcounts[SIGINT] == 0) {
+		if (sigwait (&wait_mask, &signo) != 0) {
+			fprintf (stderr,
+			    "Unable to wait for signal, errno %d\n",
+			    errno);
+			exit (1);
+		}
+		sigcounts[signo]++;
+		fprintf (stderr, "Sigwait caught signal %d\n", signo);
+
+		/* Allow the main thread to prevent the sigwait. */
+		pthread_mutex_lock (&waiter_mutex);
+		pthread_mutex_unlock (&waiter_mutex);
+	}
+
+	pthread_exit (arg);
+	return (NULL);
+}
+
+
+static void
+sighandler (int signo)
+{
+	fprintf (stderr, "  -> Signal handler caught signal %d\n", signo);
+
+	if ((signo >= 0) && (signo <= NSIG))
+		sigcounts[signo]++;
+}
+
+static void
+send_thread_signal (pthread_t tid, int signo)
+{
+	if (pthread_kill (tid, signo) != 0) {
+		fprintf (stderr, "Unable to send thread signal, errno %d.\n",
+		    errno);
+		exit (1);
+	}
+}
+
+static void
+send_process_signal (int signo)
+{
+	if (kill (getpid (), signo) != 0) {
+		fprintf (stderr, "Unable to send process signal, errno %d.\n",
+		    errno);
+		exit (1);
+	}
+}
+
+
+int main (int argc, char *argv[])
+{
+	pthread_mutexattr_t mattr;
+	pthread_attr_t	pattr;
+	pthread_t	tid;
+	void *		exit_status;
+	struct sigaction act;
+
+	/* Initialize our signal counts. */
+	memset ((void *) sigcounts, 0, NSIG * sizeof (int));
+
+	/* Setup our wait mask. */
+	sigemptyset (&wait_mask);		/* Default action	*/
+	sigaddset (&wait_mask, SIGHUP);		/* terminate		*/
+	sigaddset (&wait_mask, SIGINT);		/* terminate		*/
+	sigaddset (&wait_mask, SIGQUIT);	/* create core image	*/
+	sigaddset (&wait_mask, SIGURG);		/* ignore		*/
+	sigaddset (&wait_mask, SIGIO);		/* ignore		*/
+	sigaddset (&wait_mask, SIGUSR1);	/* terminate		*/
+
+	/* Ignore signals SIGHUP and SIGIO. */
+	sigemptyset (&act.sa_mask);
+	sigaddset (&act.sa_mask, SIGHUP);
+	sigaddset (&act.sa_mask, SIGIO);
+	act.sa_handler = SIG_IGN;
+	act.sa_flags = 0;
+	sigaction (SIGHUP, &act, NULL);
+	sigaction (SIGIO, &act, NULL);
+
+	/* Install a signal handler for SIGURG */
+	sigemptyset (&act.sa_mask);
+	sigaddset (&act.sa_mask, SIGURG);
+	act.sa_handler = sighandler;
+	act.sa_flags = SA_RESTART;
+	sigaction (SIGURG, &act, NULL);
+
+	/* Install a signal handler for SIGXCPU */
+	sigemptyset (&act.sa_mask);
+	sigaddset (&act.sa_mask, SIGXCPU);
+	sigaction (SIGXCPU, &act, NULL);
+
+	/*
+	 * Initialize the thread attribute.
+	 */
+	if ((pthread_attr_init (&pattr) != 0) ||
+	    (pthread_attr_setdetachstate (&pattr,
+	    PTHREAD_CREATE_JOINABLE) != 0)) {
+		fprintf (stderr, "Unable to initialize thread attributes.\n");
+		exit (1);
+	}
+
+	/*
+	 * Initialize and create a mutex.
+	 */
+	if ((pthread_mutexattr_init (&mattr) != 0) ||
+	    (pthread_mutex_init (&waiter_mutex, &mattr) != 0)) {
+		fprintf (stderr, "Unable to create waiter mutex.\n");
+		exit (1);
+	}
+
+	/*
+	 * Create the sigwaiter thread.
+	 */
+	if (pthread_create (&tid, &pattr, sigwaiter, NULL) != 0) {
+		fprintf (stderr, "Unable to create thread.\n");
+		exit (1);
+	}
+#if defined(_LIBC_R_)
+	pthread_set_name_np (tid, "sigwaiter");
+#endif
+
+	/*
+	 * Verify that an ignored signal doesn't cause a wakeup.
+	 * We don't have a handler installed for SIGIO.
+	 */
+	send_thread_signal (tid, SIGIO);
+	sleep (1);
+	send_process_signal (SIGIO);
+	sleep (1);
+	if (sigcounts[SIGIO] != 0)
+		fprintf (stderr,
+		    "FAIL: sigwait wakes up for ignored signal SIGIO.\n");
+
+	/*
+	 * Verify that a signal with a default action of ignore, for
+	 * which we have a signal handler installed, will release a sigwait.
+	 */
+	send_thread_signal (tid, SIGURG);
+	sleep (1);
+	send_process_signal (SIGURG);
+	sleep (1);
+	if (sigcounts[SIGURG] != 2)
+		fprintf (stderr, "FAIL: sigwait doesn't wake up for SIGURG.\n");
+
+	/*
+	 * Verify that a signal with a default action that terminates
+	 * the process will release a sigwait.
+	 */
+	send_thread_signal (tid, SIGUSR1);
+	sleep (1);
+	send_process_signal (SIGUSR1);
+	sleep (1);
+	if (sigcounts[SIGUSR1] != 2)
+		fprintf (stderr,
+		    "FAIL: sigwait doesn't wake up for SIGUSR1.\n");
+
+	/*
+	 * Verify that if we install a signal handler for a previously
+	 * ignored signal, an occurrence of this signal will release
+	 * the (already waiting) sigwait.
+	 */
+
+	/* Install a signal handler for SIGHUP. */
+	sigemptyset (&act.sa_mask);
+	sigaddset (&act.sa_mask, SIGHUP);
+	act.sa_handler = sighandler;
+	act.sa_flags = SA_RESTART;
+	sigaction (SIGHUP, &act, NULL);
+
+	/* Sending SIGHUP should release the sigwait. */
+	send_process_signal (SIGHUP);
+	sleep (1);
+	send_thread_signal (tid, SIGHUP);
+	sleep (1);
+	if (sigcounts[SIGHUP] != 2)
+		fprintf (stderr, "FAIL: sigwait doesn't wake up for SIGHUP.\n");
+
+	/*
+	 * Verify that a pending signal in the waiters mask will
+	 * cause sigwait to return the pending signal.  We do this
+	 * by taking the waiters mutex and signaling the waiter to
+	 * release him from the sigwait.  The waiter will block
+	 * on taking the mutex, and we can then send the waiter a
+	 * signal which should be added to his pending signals.
+	 * The next time the waiter does a sigwait, he should
+	 * return with the pending signal.
+	 */
+	sigcounts[SIGHUP] = 0;
+ 	pthread_mutex_lock (&waiter_mutex);
+	/* Release the waiter from sigwait. */
+	send_process_signal (SIGHUP);
+	sleep (1);
+	if (sigcounts[SIGHUP] != 1)
+		fprintf (stderr, "FAIL: sigwait doesn't wake up for SIGHUP.\n");
+	/*
+	 * Add SIGHUP to the process pending signals.  Since there is
+	 * a signal handler installed for SIGHUP and this signal is
+	 * blocked from the waiter thread and unblocked in the main
+	 * thread, the signal handler should be called once for SIGHUP.
+	 */
+	send_process_signal (SIGHUP);
+	/* Release the waiter thread and allow him to run. */
+	pthread_mutex_unlock (&waiter_mutex);
+	sleep (1);
+	if (sigcounts[SIGHUP] != 2)
+		fprintf (stderr,
+		    "FAIL: sigwait doesn't return for pending SIGHUP.\n");
+
+	/*
+	 * Repeat the above test using pthread_kill and SIGUSR1.
+	 */
+	sigcounts[SIGUSR1] = 0;
+ 	pthread_mutex_lock (&waiter_mutex);
+	/* Release the waiter from sigwait. */
+	send_thread_signal (tid, SIGUSR1);
+	sleep (1);
+	if (sigcounts[SIGUSR1] != 1)
+		fprintf (stderr,
+		    "FAIL: sigwait doesn't wake up for SIGUSR1.\n");
+	/* Add SIGUSR1 to the waiters pending signals. */
+	send_thread_signal (tid, SIGUSR1);
+	/* Release the waiter thread and allow him to run. */
+	pthread_mutex_unlock (&waiter_mutex);
+	sleep (1);
+	if (sigcounts[SIGUSR1] != 2)
+		fprintf (stderr,
+		    "FAIL: sigwait doesn't return for pending SIGUSR1.\n");
+
+	/*
+	 * Verify that we can still kill the process for a signal
+	 * not being waited on by sigwait.
+	 */
+	send_process_signal (SIGPIPE);
+	fprintf (stderr, "FAIL: SIGPIPE did not terminate process.\n");
+
+	/*
+	 * Wait for the thread to finish.
+	 */
+	pthread_join (tid, &exit_status);
+
+	return (0);
+}