Index: user/pho/stress2/misc/sem_wait.sh
===================================================================
--- user/pho/stress2/misc/sem_wait.sh	(nonexistent)
+++ user/pho/stress2/misc/sem_wait.sh	(revision 350208)
@@ -0,0 +1,106 @@
+#!/bin/sh
+
+#
+# SPDX-License-Identifier: BSD-2-Clause-FreeBSD
+#
+# Copyright (c) 2019 Dell EMC Isilon
+#
+# 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.
+#
+# $FreeBSD$
+#
+
+# "panic: vm_page_free_prep: freeing mapped page 0x657936c" seen.
+# https://people.freebsd.org/~pho/stress/log/sem_wait.txt
+# Fixed by r350005
+
+. ../default.cfg
+
+cat > /tmp/sem_wait.c <<EOF
+#include <sys/param.h>
+#include <sys/mman.h>
+#include <sys/stat.h>
+#include <sys/wait.h>
+
+#include <err.h>
+#include <pthread.h>
+#include <semaphore.h>
+#include <signal.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <time.h>
+#include <unistd.h>
+
+static sem_t *semaphore;
+
+static void *
+test(void) {
+
+	for (;;) {
+		if (sem_wait(semaphore) == -1)
+			err(1, "sem_wait");
+		if (sem_post(semaphore) == -1)
+			err(1, "sem_post");
+	}
+}
+
+int
+main(void) {
+	pid_t pid;
+	size_t len;
+	time_t start;
+
+	len = PAGE_SIZE;
+	if ((semaphore = mmap(NULL, len, PROT_READ | PROT_WRITE,
+	    MAP_ANON | MAP_SHARED, -1, 0)) == MAP_FAILED)
+		err(1, "mmap");
+
+	// initialize semaphore and set value to 1
+	if (sem_init(semaphore, 1, 1) == -1)
+		err(1, "sem_init");
+
+	if ((pid = fork()) == 0)
+		test();
+	if (pid == -1)
+		err(1, "fork()");
+
+	usleep(50);
+	alarm(300);
+	start = time(NULL);
+	while (time(NULL) - start < 60) {
+		if (sem_wait(semaphore) == -1)
+			err(1, "sem_wait");
+		if (sem_post(semaphore) == -1)
+			err(1, "sem_post");
+	}
+	kill(pid, SIGHUP);
+	if (waitpid(pid, NULL, 0) != pid)
+		err(1, "waitpid()");
+
+	return (0);
+}
+EOF
+mycc -o /tmp/sem_wait -Wall -Wextra -O2 /tmp/sem_wait.c || exit 1
+/tmp/sem_wait; s=$?
+rm -f /tmp/sem_wait /tmp/sem_wait.c
+exit $s

Property changes on: user/pho/stress2/misc/sem_wait.sh
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Added: svn:executable
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+*
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