1 /*
2 * Copyright (c) 2005, Bull S.A.. All rights reserved.
3 * Created by: Sebastien Decugis
4
5 * This program is free software; you can redistribute it and/or modify it
6 * under the terms of version 2 of the GNU General Public License as
7 * published by the Free Software Foundation.
8 *
9 * This program is distributed in the hope that it would be useful, but
10 * WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
12 *
13 * You should have received a copy of the GNU General Public License along
14 * with this program; if not, write the Free Software Foundation, Inc.,
15 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
16
17 * This sample test aims to check the following assertions:
18 *
19 * If SA_NODEFER is not set in sa_flags, the caught signal is added to the
20 * thread's signal mask during the handler execution.
21
22 * The steps are:
23 * -> register a signal handler for SIGSEGV
24 * -> raise SIGSEGV
25 * -> In handler, check for reentrance then raise SIGSEGV again.
26
27 * The test fails if signal handler if reentered or signal is not pending when raised again.
28 */
29
30
31 /******************************************************************************/
32 /*************************** standard includes ********************************/
33 /******************************************************************************/
34 #include <pthread.h>
35 #include <stdarg.h>
36 #include <stdio.h>
37 #include <stdlib.h>
38 #include <string.h>
39 #include <unistd.h>
40
41 #include <signal.h>
42 #include <errno.h>
43
44 /******************************************************************************/
45 /*************************** Test framework *******************************/
46 /******************************************************************************/
47 #include "../testfrmw/testfrmw.h"
48 #include "../testfrmw/testfrmw.c"
49 /* This header is responsible for defining the following macros:
50 * UNRESOLVED(ret, descr);
51 * where descr is a description of the error and ret is an int
52 * (error code for example)
53 * FAILED(descr);
54 * where descr is a short text saying why the test has failed.
55 * PASSED();
56 * No parameter.
57 *
58 * Both three macros shall terminate the calling process.
59 * The testcase shall not terminate in any other maneer.
60 *
61 * The other file defines the functions
62 * void output_init()
63 * void output(char * string, ...)
64 *
65 * Those may be used to output information.
66 */
67
68 /******************************************************************************/
69 /**************************** Configuration ***********************************/
70 /******************************************************************************/
71 #ifndef VERBOSE
72 #define VERBOSE 1
73 #endif
74
75 #define SIGNAL SIGSEGV
76
77 /******************************************************************************/
78 /*************************** Test case ***********************************/
79 /******************************************************************************/
80
81 int called = 0;
82
handler(int sig LTP_ATTRIBUTE_UNUSED)83 void handler(int sig LTP_ATTRIBUTE_UNUSED)
84 {
85 int ret;
86 sigset_t pending;
87 called++;
88
89 if (called == 2) {
90 FAILED("Signal was not masked in signal handler");
91 }
92
93 if (called == 1) {
94
95 /* Raise the signal again. It should be masked */
96 ret = raise(SIGNAL);
97
98 if (ret != 0) {
99 UNRESOLVED(ret, "Failed to raise SIGSEGV again");
100 }
101
102 /* check the signal is pending */
103 ret = sigpending(&pending);
104
105 if (ret != 0) {
106 UNRESOLVED(ret, "Failed to get pending signal set");
107 }
108
109 ret = sigismember(&pending, SIGNAL);
110
111 if (ret != 1) {
112 FAILED("signal is not pending");
113 }
114 }
115
116 called++;
117 }
118
119 /* main function */
main(void)120 int main(void)
121 {
122 int ret;
123
124 struct sigaction sa;
125
126 /* Initialize output */
127 output_init();
128
129 /* Set the signal handler */
130 sa.sa_flags = 0;
131
132 sa.sa_handler = handler;
133
134 ret = sigemptyset(&sa.sa_mask);
135
136 if (ret != 0) {
137 UNRESOLVED(ret, "Failed to empty signal set");
138 }
139
140 /* Install the signal handler for SIGSEGV */
141 ret = sigaction(SIGNAL, &sa, 0);
142
143 if (ret != 0) {
144 UNRESOLVED(ret, "Failed to set signal handler");
145 }
146
147 ret = raise(SIGNAL);
148
149 if (ret != 0) {
150 UNRESOLVED(ret, "Failed to raise SIGSEGV");
151 }
152
153 while (called != 4)
154 sched_yield();
155
156 /* Test passed */
157 #if VERBOSE > 0
158
159 output("Test passed\n");
160
161 #endif
162
163 PASSED;
164 }
165