--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/usr/src/cmd/dtrace/test/tst/common/pid/tst.vfork.c	Tue Jun 02 18:56:50 2009 +0900
@@ -0,0 +1,65 @@
+/*
+ * CDDL HEADER START
+ *
+ * The contents of this file are subject to the terms of the
+ * Common Development and Distribution License (the "License").
+ * You may not use this file except in compliance with the License.
+ *
+ * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
+ * or http://www.opensolaris.org/os/licensing.
+ * See the License for the specific language governing permissions
+ * and limitations under the License.
+ *
+ * When distributing Covered Code, include this CDDL HEADER in each
+ * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
+ * If applicable, add the following below this CDDL HEADER, with the
+ * fields enclosed by brackets "[]" replaced with your own identifying
+ * information: Portions Copyright [yyyy] [name of copyright owner]
+ *
+ * CDDL HEADER END
+ */
+
+/*
+ * Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
+ * Use is subject to license terms.
+ */
+
+#pragma ident	"@(#)tst.vfork.c	1.1	06/08/28 SMI"
+
+#include <unistd.h>
+
+int
+waiting(volatile int *a)
+{
+	return (*a);
+}
+
+int
+go(void)
+{
+	int i, j, total = 0;
+
+	for (i = 0; i < 10; i++) {
+		for (j = 0; j < 10; j++) {
+			total += i * j;
+		}
+	}
+
+	return (total);
+}
+
+int
+main(int argc, char **argv)
+{
+	volatile int a = 0;
+
+	while (waiting(&a) == 0)
+		continue;
+
+	if (vfork() == 0) {
+		int ret = go();
+		(void) _exit(ret);
+	}
+
+	return (0);
+}