1 files changed, 131 insertions, 0 deletions
diff --git a/tools/test/stress2/misc/context2.sh b/tools/test/stress2/misc/context2.sh
new file mode 100755
index 000000000000..093e72e9084d
--- /dev/null
+++ b/tools/test/stress2/misc/context2.sh
@@ -0,0 +1,131 @@
+#!/bin/sh
+
+#
+# Copyright (c) 2016 EMC Corp.
+# 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.
+#
+
+# This problem was seen with WiP kernel code:
+# https://people.freebsd.org/~pho/stress/log/kostik1210.txt
+
+. ../default.cfg
+
+here=`pwd`
+cd /tmp
+sed '1,/^EOF/d' < $here/$0 > context2.c
+mycc -o context2 -Wall -Wextra -O2 context2.c -lpthread || exit 1
+rm -f context2.c
+[ -d $RUNDIR ] || mkdir -p $RUNDIR
+cd $RUNDIR
+
+daemon sh -c "(cd $here/../testcases/swap; ./swap -t 10m -i 20)" > \
+    /dev/null 2>&1
+for i in `jot 4`; do
+	/tmp/context2 &
+done
+wait
+while pgrep -q swap; do
+	pkill -9 swap
+done
+rm -f /tmp/context2
+exit 0
+EOF
+/*
+ * Inspired by lmbench-3.0-a9/src/lat_ctx.c
+ * Pass a token thru pipes to NTHREADS+1 threads in a circular list.
+ */
+
+#include <sys/types.h>
+
+#include <err.h>
+#include <errno.h>
+#include <pthread.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <time.h>
+#include <unistd.h>
+
+#define NTHREADS 64
+#define RUNTIME 300
+
+pid_t pid[NTHREADS];
+int fds[NTHREADS+1][2];
+
+void *
+thr_routine(void *arg)
+{
+	int i;
+	int token;
+
+	i = (long)arg;
+	for (;;) {
+		if (read(fds[i][0], &token, sizeof(token)) != sizeof(token))
+			err(1, "read pipe 2");
+		token++;
+		if (write(fds[i+1][1], &token, sizeof(token)) != sizeof(token))
+			err(1, "write pipe 1");
+	}
+	return (0);
+}
+
+int
+main(void)
+{
+	pthread_t threads[NTHREADS];
+	time_t start;
+	long arg;
+	int i, r, token;
+
+	for (i = 0; i < NTHREADS + 1; i++) {
+		if (pipe(fds[i]) == -1)
+			err(1, "pipe");
+	}
+
+	for (i = 0; i < NTHREADS; i++) {
+		arg = i;
+		if ((r = pthread_create(&threads[i], NULL, thr_routine,
+		    (void *)arg)) != 0)
+			errc(1, r, "pthread_create(): %s\n", strerror(r));
+	}
+
+	start = time(NULL);
+	while (time(NULL) - start < RUNTIME) {
+		token = 0;
+		if (write(fds[0][1], &token, sizeof(token)) != sizeof(token))
+			err(1, "write pipe 2");
+		if (read(fds[NTHREADS][0], &token, sizeof(token)) !=
+		    sizeof(token))
+			err(1, "read pipe 1");
+	}
+
+	for (i = 0; i < NTHREADS; i++)
+		if ((r = pthread_cancel(threads[i])) != 0)
+			errc(1, r, "pthread_cancel(%d)", i);
+	for (i = 0; i < NTHREADS; i++)
+		if ((r = pthread_join(threads[i], NULL)) != 0)
+			errc(1, r, "pthread_join(%d)", i);
+
+        return (0);
+}