1 /*
2 * Copyright (c) 2005, Bull S.A.. All rights reserved.
3 * Created by: Sebastien Decugis
4 * Copyright (c) 2013 Cyril Hrubis <chrubis@suse.cz>
5 *
6 * This program is free software; you can redistribute it and/or modify it
7 * under the terms of version 2 of the GNU General Public License as
8 * published by the Free Software Foundation.
9 *
10 * This program is distributed in the hope that it would be useful, but
11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
13 *
14 * You should have received a copy of the GNU General Public License along
15 * with this program; if not, write the Free Software Foundation, Inc.,
16 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
17 *
18 * This sample test aims to check the following assertions:
19 *
20 * If SA_SIGINFO is set in sa_flags and Real Time Signals extension is supported,
21 * sa_sigaction is used as the signal handling function.
22 *
23 * The steps are:
24 * -> test for RTS extension
25 * -> register a handler for SIGBUS with SA_SIGINFO, and a known function
26 * as sa_sigaction
27 * -> raise SIGBUS, and check the function has been called.
28 *
29 * The test fails if the function is not called
30 */
31
32 /* We are testing conformance to IEEE Std 1003.1, 2003 Edition */
33 #define _POSIX_C_SOURCE 200112L
34
35 #include <pthread.h>
36 #include <stdarg.h>
37 #include <stdio.h>
38 #include <stdlib.h>
39 #include <string.h>
40 #include <unistd.h>
41 #include <signal.h>
42 #include <errno.h>
43 #include "posixtest.h"
44
45 #define WRITE(str) write(STDOUT_FILENO, str, sizeof(str) - 1)
46
47 static volatile sig_atomic_t called = 0;
48
handler(int sig,siginfo_t * info,void * context)49 static void handler(int sig, siginfo_t *info, void *context)
50 {
51 (void) sig;
52 (void) context;
53
54 if (info->si_signo != SIGBUS) {
55 WRITE("Wrong signal generated?\n");
56 _exit(PTS_FAIL);
57 }
58
59 called = 1;
60 }
61
main(void)62 int main(void)
63 {
64 int ret;
65 long rts;
66
67 struct sigaction sa;
68
69 /* Test the RTS extension */
70 rts = sysconf(_SC_REALTIME_SIGNALS);
71
72 if (rts < 0L) {
73 fprintf(stderr, "This test needs the RTS extension");
74 return PTS_UNTESTED;
75 }
76
77 /* Set the signal handler */
78 sa.sa_flags = SA_SIGINFO;
79 sa.sa_sigaction = handler;
80
81 ret = sigemptyset(&sa.sa_mask);
82
83 if (ret != 0) {
84 perror("Failed to empty signal set");
85 return PTS_UNRESOLVED;
86 }
87
88 /* Install the signal handler for SIGBUS */
89 ret = sigaction(SIGBUS, &sa, 0);
90
91 if (ret != 0) {
92 perror("Failed to set signal handler");
93 return PTS_UNTESTED;
94 }
95
96 if (called) {
97 fprintf(stderr,
98 "The signal handler has been called before signal was raised");
99 return PTS_FAIL;
100 }
101
102 ret = raise(SIGBUS);
103
104 if (ret != 0) {
105 perror("Failed to raise SIGBUS");
106 return PTS_UNRESOLVED;
107 }
108
109 if (!called) {
110 fprintf(stderr, "The sa_handler was not called");
111 return PTS_FAIL;
112 }
113
114 printf("Test PASSED\n");
115
116 return PTS_PASS;
117 }
118