svn commit: r310978 - user/pho/stress2/misc

[Peter Holm]

Author: pho
Date: Sat Dec 31 16:02:27 2016
New Revision: 310978
URL: https://svnweb.freebsd.org/changeset/base/310978

Log:
  Added a regression test.
  
  Sponsored by:	Dell EMC Isilon
  In collaboration with:	 kib

Added:
  user/pho/stress2/misc/shm.sh   (contents, props changed)

Added: user/pho/stress2/misc/shm.sh
==============================================================================
--- /dev/null	00:00:00 1970	(empty, because file is newly added)
+++ user/pho/stress2/misc/shm.sh	Sat Dec 31 16:02:27 2016	(r310978)
@@ -0,0 +1,203 @@
+#!/bin/sh
+
+#
+# Copyright (c) 2016 Dell EMC Isilon
+# 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.
+#
+# THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
+#
+# $FreeBSD$
+#
+
+# Regression test for r310849. Hang in "vmpfw" was seen.
+
+# Test scenario suggestion by kib.
+
+[ `id -u ` -ne 0 ] && echo "Must be root!" && exit 1
+
+. ../default.cfg
+
+RUNTIME=60
+old=`sysctl -n kern.ipc.shm_use_phys`
+trap "sysctl kern.ipc.shm_use_phys=$old" EXIT INT
+sysctl kern.ipc.shm_use_phys=1
+
+dir=/tmp
+odir=`pwd`
+cd $dir
+sed '1,/^EOF/d' < $odir/$0 > $dir/shm.c
+mycc -o shm -Wall -Wextra -O0 -g shm.c -pthread || exit 1
+rm -f shm.c
+
+/tmp/shm &
+
+s=0
+sleep $RUNTIME
+if pgrep -q shm; then
+	if pgrep shm | xargs ps -lHp | grep -q vmpfw; then
+		s=1
+		echo FAIL
+		pgrep shm | xargs ps -lHp
+		pkill -9 shm
+	fi
+fi
+wait
+
+rm -rf /tmp/shm
+exit $s
+
+EOF
+#include <sys/param.h>
+#include <sys/ipc.h>
+#include <sys/mman.h>
+#include <sys/shm.h>
+#include <sys/stat.h>
+#include <sys/wait.h>
+
+#include <err.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <pthread.h>
+#include <pthread_np.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <time.h>
+#include <unistd.h>
+
+static void *shmp;
+static size_t len;
+static int cont, shmid;
+
+#define PAGES 64
+#define RUNTIME (1 * 60)
+#define STOP 1
+#define SYNC 0
+
+static void
+cleanup(void)
+{
+	if (shmp != MAP_FAILED)
+		shmdt(shmp);
+	if (shmid != 0)
+		shmctl(shmid, IPC_RMID, NULL);
+}
+
+static void *
+t1(void *arg __unused)
+{
+	time_t start;
+	char *cp;
+
+	pthread_set_name_np(pthread_self(), __func__);
+	start = time(NULL);
+	while (cont == 1 && (time(NULL) - start) < RUNTIME) {
+		if ((cp = mmap(NULL, len, PROT_READ | PROT_WRITE,
+		    MAP_ANON | MAP_SHARED, -1, 0)) == MAP_FAILED)
+			err(1, "mmap");
+		usleep(arc4random() % 400);
+		if (munmap(cp, len) == -1)
+			warn("unmap(%p, %zu)", shmp, len);
+	}
+
+	return (NULL);
+}
+
+static void *
+t2(void *arg __unused)
+{
+	key_t shmkey;
+	size_t i; 
+	time_t start;
+	char *cp;
+
+	pthread_set_name_np(pthread_self(), __func__);
+	shmkey = ftok("/tmp", getpid());
+	start = time(NULL);
+	atexit(cleanup);
+	while ((time(NULL) - start) < RUNTIME) {
+		if ((shmid = shmget(shmkey, len, IPC_CREAT | IPC_EXCL |
+		    0640)) == -1) {
+			if (errno != ENOSPC && errno != EEXIST)
+				err(1, "shmget (%s:%d)", __FILE__, __LINE__);
+			break;
+		}
+		if ((shmp = shmat(shmid, NULL, 0)) == (void *) -1)
+			break;
+		cp = (char *)(shmp);
+		for (i = 0; i < len; i = i + PAGE_SIZE)
+			cp[i] = 1;
+		if (shmdt(shmp) == -1) {
+			if (errno != EINVAL)
+				warn("shmdt(%p)", shmp);
+		}
+		if (shmctl(shmid, IPC_RMID, NULL) == -1)
+			warn("shmctl IPC_RMID");
+		usleep(50);
+
+		shmp = MAP_FAILED;
+		shmid = 0;
+	}
+	cont = 0;
+
+	return (NULL);
+}
+
+static int
+test(void)
+{
+	pthread_t tid[2];
+	int i, rc;
+
+	shmp = MAP_FAILED;
+
+	cont = 1;
+	if ((rc = pthread_create(&tid[0], NULL, t1, NULL)) != 0)
+		errc(1, rc, "pthread_create()");
+	if ((rc = pthread_create(&tid[1], NULL, t2, NULL)) != 0)
+		errc(1, rc, "pthread_create()");
+
+	for (i = 0; i < 2; i++)
+		if ((rc = pthread_join(tid[i], NULL)) != 0)
+			errc(1, rc, "pthread_join(%d)", i);
+
+	return (0);
+}
+
+int
+main(void)
+{
+	pid_t pid;
+	time_t start;
+
+	len = PAGES * PAGE_SIZE;
+	start = time(NULL);
+	while ((time(NULL) - start) < RUNTIME) {
+		if ((pid = fork()) == 0) {
+			test();
+			exit(0);	/* calls cleanup() */
+		}
+		if (waitpid(pid, NULL,0) != pid)
+			err(1, "waitpid(%d)", pid);
+	}
+
+	return(0);
+}