1 /*	$OpenBSD: bb.c,v 1.2 2010/06/20 17:57:09 phessler Exp $	*/
2 
3 /*
4  * Copyright (c) 2005 Kurt Miller <kurt@openbsd.org>
5  *
6  * Permission to use, copy, modify, and distribute this software for any
7  * purpose with or without fee is hereby granted, provided that the above
8  * copyright notice and this permission notice appear in all copies.
9  *
10  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
11  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
13  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14  * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
15  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
16  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17  */
18 
19 #include <stdio.h>
20 
21 int weakFunction1(void) __attribute__((weak));
22 int weakFunction2(void) __attribute__((weak));
23 
24 /* this function should be called */
25 int
26 weakFunction1()
27 {
28 	return 0;
29 }
30 
31 /* this function should be not be called, the one it libaa should */
32 int
33 weakFunction2()
34 {
35 	return 1;
36 }
37 
38 int
39 bbTest1()
40 {
41 	int ret = 0;
42 
43 	/*
44 	 * make sure weakFunction1 from libaa (undefined weak) doesn't
45 	 * interfere with calling weakFunction1 here
46 	 */
47 	if (weakFunction1) {
48 		weakFunction1();
49 	} else {
50 		printf("weakFunction1() overwritten by undefined weak "
51 		    "in libaa\n");
52 		ret = 1;
53 	}
54 
55 	/*
56 	 * make sure weakFunction2 from libaa is called instead of the
57 	 * one here
58 	 */
59 	if (weakFunction2()) {
60 		printf("wrong weakFunction2() called\n");
61 		ret = 1;
62 	}
63 
64 	return (ret);
65 }
66