Revise test code for sigwait and add test code for sigsuspend.

Submitted by: Daniel M. Eischen <eischen@vigrid.com>

2 files changed, 281 insertions, 0 deletions

diff --git a/lib/libc_r/test/sigsuspend/Makefile b/lib/libc_r/test/sigsuspend/Makefile
new file mode 100644
index 0000000..59ea321
--- /dev/null
+++ b/lib/libc_r/test/sigsuspend/Makefile
@@ -0,0 +1,8 @@
+#	$Id: Makefile,v 1.1 1998/08/25 12:35:16 jb Exp $
+
+PROG=		sigsuspend
+SRCS=		sigsuspend.c
+NOMAN=		1
+LDFLAGS=	-pthread
+
+.include <bsd.prog.mk>
diff --git a/lib/libc_r/test/sigsuspend/sigsuspend.c b/lib/libc_r/test/sigsuspend/sigsuspend.c
new file mode 100644
index 0000000..894b092
--- /dev/null
+++ b/lib/libc_r/test/sigsuspend/sigsuspend.c
@@ -0,0 +1,273 @@
+/*
+ * 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.
+ *
+ */
+#include <stdlib.h>
+#include <unistd.h>
+
+#include <errno.h>
+#include <pthread.h>
+#include <signal.h>
+#include <stdio.h>
+#include <string.h>
+
+#if defined(__FreeBSD__)
+#include <pthread_np.h>
+#endif
+
+static int	sigcounts[NSIG + 1];
+static int	sigfifo[NSIG + 1];
+static int	fifo_depth = 0;
+static sigset_t suspender_mask;
+static pthread_t suspender_tid;
+
+
+static void *
+sigsuspender (void *arg)
+{
+	int save_count, status, i;
+	sigset_t run_mask;
+
+	/* Run with all signals blocked. */
+	sigfillset (&run_mask);
+	sigprocmask (SIG_SETMASK, &run_mask, NULL);
+
+	/* Allow these signals to wake us up during a sigsuspend. */
+	sigfillset (&suspender_mask);		/* Default action	*/
+	sigdelset (&suspender_mask, SIGINT);	/* terminate		*/
+	sigdelset (&suspender_mask, SIGHUP);	/* terminate		*/
+	sigdelset (&suspender_mask, SIGQUIT);	/* create core image	*/
+	sigdelset (&suspender_mask, SIGURG);	/* ignore		*/
+	sigdelset (&suspender_mask, SIGIO);	/* ignore		*/
+	sigdelset (&suspender_mask, SIGUSR2);	/* terminate		*/
+
+	while (sigcounts[SIGINT] == 0) {
+		save_count = sigcounts[SIGUSR2];
+
+		status = sigsuspend (&suspender_mask);
+		if ((status == 0) || (errno != EINTR)) {
+			printf ("Unable to suspend for signals, "
+				"errno %d, return value %d\n",
+				errno, status);
+			exit (1);
+		}
+		for (i = 0; i < fifo_depth; i++)
+			printf ("Sigsuspend woke up by signal %d\n",
+				sigfifo[i]);
+		fifo_depth = 0;
+	}
+
+	pthread_exit (arg);
+	return (NULL);
+}
+
+
+static void
+sighandler (int signo)
+{
+	sigset_t set;
+	pthread_t self;
+
+	if ((signo >= 0) && (signo <= NSIG))
+		sigcounts[signo]++;
+
+	/*
+	 * If we are running on behalf of the suspender thread,
+	 * ensure that we have the correct mask set.
+	 */
+	self = pthread_self ();
+	if (self == suspender_tid) {
+		sigfifo[fifo_depth] = signo;
+		fifo_depth++;
+		printf ("  -> Suspender thread signal handler caught signal %d\n",
+			signo);
+		sigprocmask (SIG_SETMASK, NULL, &set);
+		if (set != suspender_mask)
+			printf ("  >>> FAIL: sigsuspender signal handler running "
+				"with incorrect mask.\n");
+	}
+	else
+		printf ("  -> Main thread signal handler caught signal %d\n",
+			signo);
+}
+
+
+static void
+send_thread_signal (pthread_t tid, int signo)
+{
+	if (pthread_kill (tid, signo) != 0) {
+		printf ("Unable to send thread signal, errno %d.\n", errno);
+		exit (1);
+	}
+}
+
+
+static void
+send_process_signal (int signo)
+{
+	if (kill (getpid (), signo) != 0) {
+		printf ("Unable to send process signal, errno %d.\n", errno);
+		exit (1);
+	}
+}
+
+
+int main (int argc, char *argv[])
+{
+	pthread_attr_t	pattr;
+	void *		exit_status;
+	struct sigaction act;
+	sigset_t	oldset;
+	sigset_t	newset;
+
+	/* Initialize our signal counts. */
+	memset ((void *) sigcounts, 0, NSIG * sizeof (int));
+
+	/* Ignore signal SIGIO. */
+	sigemptyset (&act.sa_mask);
+	sigaddset (&act.sa_mask, SIGIO);
+	act.sa_handler = SIG_IGN;
+	act.sa_flags = 0;
+	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);
+
+	/* Get our current signal mask. */
+	sigprocmask (SIG_SETMASK, NULL, &oldset);
+
+	/* Mask out SIGUSR1 and SIGUSR2. */
+	newset = oldset;
+	sigaddset (&newset, SIGUSR1);
+	sigaddset (&newset, SIGUSR2);
+	sigprocmask (SIG_SETMASK, &newset, NULL);
+
+	/* Install a signal handler for SIGUSR1 and SIGUSR2 */
+	sigemptyset (&act.sa_mask);
+	sigaddset (&act.sa_mask, SIGUSR1);
+	sigaddset (&act.sa_mask, SIGUSR2);
+	act.sa_handler = sighandler;
+	act.sa_flags = SA_RESTART;
+	sigaction (SIGUSR1, &act, NULL);
+	sigaction (SIGUSR2, &act, NULL);
+
+	/*
+	 * Initialize the thread attribute.
+	 */
+	if ((pthread_attr_init (&pattr) != 0) ||
+	    (pthread_attr_setdetachstate (&pattr,
+	    PTHREAD_CREATE_JOINABLE) != 0)) {
+		printf ("Unable to initialize thread attributes.\n");
+		exit (1);
+	}
+
+	/*
+	 * Create the sigsuspender thread.
+	 */
+	if (pthread_create (&suspender_tid, &pattr, sigsuspender, NULL) != 0) {
+		printf ("Unable to create thread, errno %d.\n", errno);
+		exit (1);
+	}
+#if defined(__FreeBSD__)
+	pthread_set_name_np (suspender_tid, "sigsuspender");
+#endif
+
+	/*
+	 * Verify that an ignored signal doesn't cause a wakeup.
+	 * We don't have a handler installed for SIGIO.
+	 */
+	send_thread_signal (suspender_tid, SIGIO);
+	sleep (1);
+	send_process_signal (SIGIO);
+	sleep (1);
+	if (sigcounts[SIGIO] != 0)
+		printf ("FAIL: sigsuspend 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
+	 * sigsuspend.
+	 */
+	send_thread_signal (suspender_tid, SIGURG);
+	sleep (1);
+	send_process_signal (SIGURG);
+	sleep (1);
+	if (sigcounts[SIGURG] != 3)
+		printf ("FAIL: sigsuspend doesn't wake up for SIGURG.\n");
+
+	/*
+	 * Verify that a SIGUSR2 signal will release a sigsuspended
+	 * thread.
+	 */
+	send_thread_signal (suspender_tid, SIGUSR2);
+	sleep (1);
+	send_process_signal (SIGUSR2);
+	sleep (1);
+	if (sigcounts[SIGUSR2] != 2)
+		printf ("FAIL: sigsuspend doesn't wake up for SIGUSR2.\n");
+
+	/*
+	 * Verify that a signal, blocked in both the main and
+	 * sigsuspender threads, does not cause the signal handler
+	 * to be called.
+	 */
+	send_thread_signal (suspender_tid, SIGUSR1);
+	sleep (1);
+	send_process_signal (SIGUSR1);
+	sleep (1);
+	if (sigcounts[SIGUSR1] != 0)
+		printf ("FAIL: signal hander called for SIGUSR1.\n");
+
+	/*
+	 * Verify that we can still kill the process for a signal
+	 * not being waited on by sigwait.
+	 */
+	send_process_signal (SIGPIPE);
+	printf ("FAIL: SIGPIPE did not terminate process.\n");
+
+	/*
+	 * Wait for the thread to finish.
+	 */
+	pthread_join (suspender_tid, &exit_status);
+
+	return (0);
+}
+