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

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Submitted by: Daniel M. Eischen <eischen@vigrid.com>
This commit is contained in:
John Birrell 1998-09-30 07:08:09 +00:00
parent f51ea46d24
commit 058716097d
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=39810
4 changed files with 116 additions and 18 deletions
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4
lib/libc_r/test/Makefile
View file

@ -1,8 +1,8 @@
# $Id$
# $Id: Makefile,v 1.1 1998/08/25 12:33:22 jb Exp $
#
# Tests for libc_r functionality.
#
SUBDIR= sigwait
SUBDIR= sigsuspend sigwait
.include <bsd.subdir.mk>

122
lib/libc_r/test/sigwait/sigwait.c
View file

@ -12,13 +12,13 @@
* 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 John Birrell.
* 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 JOHN BIRRELL AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* 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
@ -31,21 +31,33 @@
*
*/
#include <stdlib.h>
#include <stdio.h>
#include <unistd.h>
#include <errno.h>
#include <pthread.h>
#include <signal.h>
#include <stdio.h>
#include <string.h>
static int sigcounts[NSIG + 1];
static sigset_t wait_mask;
#if defined(__FreeBSD__)
#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) {
@ -55,6 +67,10 @@ sigwaiter (void *arg)
}
sigcounts[signo]++;
printf ("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);
@ -65,7 +81,7 @@ sigwaiter (void *arg)
static void
sighandler (int signo)
{
printf ("Signal handler caught signal %d\n", signo);
printf (" -> Signal handler caught signal %d\n", signo);
if ((signo >= 0) && (signo <= NSIG))
sigcounts[signo]++;
@ -92,6 +108,7 @@ send_process_signal (int signo)
int main (int argc, char *argv[])
{
pthread_mutexattr_t mattr;
pthread_attr_t pattr;
pthread_t tid;
void * exit_status;
@ -102,18 +119,20 @@ int main (int argc, char *argv[])
/* Setupt our wait mask. */
sigemptyset (&wait_mask); /* Default action */
sigaddset (&wait_mask, SIGINT); /* terminate */
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 signal SIGIO. */
/* 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 */
@ -138,22 +157,32 @@ int main (int argc, char *argv[])
exit (1);
}
/*
* Initialize and create a mutex.
*/
if ((pthread_mutexattr_init (&mattr) != 0) ||
(pthread_mutex_init (&waiter_mutex, &mattr) != 0)) {
printf ("Unable to create waiter mutex.\n");
exit (1);
}
/*
* Create the sigwaiter thread.
*/
if (pthread_create (&tid, &pattr, sigwaiter, NULL) != 0) {
printf ("Unable to create thread, errno %d.\n", errno);
printf ("Unable to create thread.\n");
exit (1);
}
#if defined(__FreeBSD__)
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.
*/
printf ("Sending pthread_kill SIGIO.\n");
send_thread_signal (tid, SIGIO);
sleep (1);
printf ("Sending kill SIGIO.\n");
send_process_signal (SIGIO);
sleep (1);
if (sigcounts[SIGIO] != 0)
@ -181,6 +210,75 @@ int main (int argc, char *argv[])
if (sigcounts[SIGUSR1] != 2)
printf ("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)
printf ("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)
printf ("FAIL: sigwait doesn't wake up for SIGHUP.\n");
/*
* Add SIGHUP to all threads 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] != 3)
printf ("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)
printf ("FAIL: sigwait doesn't wake up for SIGUSR1.\n");
/* Add SIGHUP 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)
printf ("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.

4
lib/libkse/test/Makefile
View file

@ -1,8 +1,8 @@
# $Id$
# $Id: Makefile,v 1.1 1998/08/25 12:33:22 jb Exp $
#
# Tests for libc_r functionality.
#
SUBDIR= sigwait
SUBDIR= sigsuspend sigwait
.include <bsd.subdir.mk>

4
lib/libpthread/test/Makefile
View file

@ -1,8 +1,8 @@
# $Id$
# $Id: Makefile,v 1.1 1998/08/25 12:33:22 jb Exp $
#
# Tests for libc_r functionality.
#
SUBDIR= sigwait
SUBDIR= sigsuspend sigwait
.include <bsd.subdir.mk>