xref: /freebsd/cddl/contrib/opensolaris/cmd/dtrace/test/tst/common/ustack/tst.spin.c (revision c6989859ae9388eeb46a24fe88f9b8d07101c710)
1 /*
2  * CDDL HEADER START
3  *
4  * The contents of this file are subject to the terms of the
5  * Common Development and Distribution License (the "License").
6  * You may not use this file except in compliance with the License.
7  *
8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9  * or http://www.opensolaris.org/os/licensing.
10  * See the License for the specific language governing permissions
11  * and limitations under the License.
12  *
13  * When distributing Covered Code, include this CDDL HEADER in each
14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15  * If applicable, add the following below this CDDL HEADER, with the
16  * fields enclosed by brackets "[]" replaced with your own identifying
17  * information: Portions Copyright [yyyy] [name of copyright owner]
18  *
19  * CDDL HEADER END
20  */
21 
22 /*
23  * Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
24  * Use is subject to license terms.
25  */
26 
27 #include <unistd.h>
28 
29 extern volatile long long count;
30 
31 volatile long long count = 0;
32 
33 int baz(int);
34 int bar(int);
35 int foo(int, int);
36 
37 int
baz(int a)38 baz(int a)
39 {
40 	(void) getpid();
41 	while (count != -1) {
42 		count++;
43 		a++;
44 	}
45 
46 	return (a + 1);
47 }
48 
49 int
bar(int a)50 bar(int a)
51 {
52 	return (baz(a + 1) - 1);
53 }
54 
55 int
foo(int a,int b)56 foo(int a, int b)
57 {
58 	return (bar(a) - b);
59 }
60 
61 int
main(int argc,char ** argv)62 main(int argc, char **argv)
63 {
64 	return (foo(argc, (int)(uintptr_t)argv) == 0);
65 }
66