svn commit: r251800 - user/pho/stress2/misc

[Peter Holm]

Author: pho
Date: Sun Jun 16 06:56:17 2013
New Revision: 251800
URL: http://svnweb.freebsd.org/changeset/base/251800

Log:
  Added umtx(2) regression test for problem fixed with r251684.

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

Added: user/pho/stress2/misc/rwlock_ronly.sh
==============================================================================
--- /dev/null	00:00:00 1970	(empty, because file is newly added)
+++ user/pho/stress2/misc/rwlock_ronly.sh	Sun Jun 16 06:56:17 2013	(r251800)
@@ -0,0 +1,82 @@
+#!/bin/sh
+
+#
+# Copyright (c) 2013 Peter Holm <pho at FreeBSD.org>
+# 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.
+#
+# $FreeBSD$
+#
+
+# Test scenario by kib@
+# Demonstrate process looping in kernel mode.
+# Fixed in r251684.
+
+dir=/tmp
+odir=`pwd`
+cd $dir
+sed '1,/^EOF/d' < $odir/$0 > $dir/rwlock_ronly.c
+cc -o rwlock_ronly -Wall -Wextra rwlock_ronly.c || exit 1
+rm -f rwlock_ronly.c
+cd $odir
+
+/tmp/rwlock_ronly || echo OK
+
+rm -f /tmp/rwlock_ronly
+exit
+
+EOF
+/* $Id: rwlock_ronly.c,v 1.2 2013/06/10 04:44:08 kostik Exp kostik $ */
+
+#include <sys/types.h>
+#include <sys/mman.h>
+#include <errno.h>
+#include <sys/umtx.h>
+#include <err.h>
+#include <unistd.h>
+
+int
+main(void)
+{
+	char *p;
+	struct urwlock *rw;
+	int error;
+
+	p = mmap(NULL, getpagesize(), PROT_READ | PROT_WRITE,
+	    MAP_SHARED | MAP_ANON, -1, 0);
+	if (p == (char *)MAP_FAILED)
+		err(1, "mmap");
+
+	rw = (struct urwlock *)p;
+	rw->rw_state = URWLOCK_READ_WAITERS;
+
+	error = mprotect(p, getpagesize(), PROT_READ);
+	if (error == -1)
+		err(1, "mprotect");
+
+	error = _umtx_op(p, UMTX_OP_RW_RDLOCK, 0, NULL, NULL);
+	if (error != 0)
+		err(1, "rdlock");
+
+	return (0);
+}