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 SIGALRM
24 * -> raise SIGALRM
25 * -> In handler, check for reentrance then raise SIGALRM again.
26
27 * The test fails if signal handler if reentered or signal is not pending when raised again.
28 */
29
30 /******************************************************************************/
31 /*************************** standard includes ********************************/
32 /******************************************************************************/
33 #include <pthread.h>
34 #include <stdarg.h>
35 #include <stdio.h>
36 #include <stdlib.h>
37 #include <string.h>
38 #include <unistd.h>
39
40 #include <signal.h>
41 #include <errno.h>
42
43 /******************************************************************************/
44 /*************************** Test framework *******************************/
45 /******************************************************************************/
46 #include "../testfrmw/testfrmw.h"
47 #include "../testfrmw/testfrmw.c"
48 /* This header is responsible for defining the following macros:
49 * UNRESOLVED(ret, descr);
50 * where descr is a description of the error and ret is an int
51 * (error code for example)
52 * FAILED(descr);
53 * where descr is a short text saying why the test has failed.
54 * PASSED();
55 * No parameter.
56 *
57 * Both three macros shall terminate the calling process.
58 * The testcase shall not terminate in any other maneer.
59 *
60 * The other file defines the functions
61 * void output_init()
62 * void output(char * string, ...)
63 *
64 * Those may be used to output information.
65 */
66
67 #ifndef VERBOSE
68 #define VERBOSE 1
69 #endif
70
71 #define SIGNAL SIGALRM
72
73 int called = 0;
74
handler(int sig)75 void handler(int sig)
76 {
77 int ret;
78 sigset_t pending;
79 called++;
80
81 if (called == 2) {
82 FAILED("Signal was not masked in signal handler");
83 }
84
85 if (called == 1) {
86
87 /* Raise the signal again. It should be masked */
88 ret = raise(SIGNAL);
89
90 if (ret != 0) {
91 UNRESOLVED(ret, "Failed to raise SIGALRM again");
92 }
93
94 /* check the signal is pending */
95 ret = sigpending(&pending);
96
97 if (ret != 0) {
98 UNRESOLVED(ret, "Failed to get pending signal set");
99 }
100
101 ret = sigismember(&pending, SIGNAL);
102
103 if (ret != 1) {
104 FAILED("signal is not pending");
105 }
106 }
107
108 called++;
109 }
110
111 /* main function */
main(void)112 int main(void)
113 {
114 int ret;
115
116 struct sigaction sa;
117
118 /* Initialize output */
119 output_init();
120
121 /* Set the signal handler */
122 sa.sa_flags = 0;
123
124 sa.sa_handler = handler;
125
126 ret = sigemptyset(&sa.sa_mask);
127
128 if (ret != 0) {
129 UNRESOLVED(ret, "Failed to empty signal set");
130 }
131
132 /* Install the signal handler for SIGALRM */
133 ret = sigaction(SIGNAL, &sa, 0);
134
135 if (ret != 0) {
136 UNRESOLVED(ret, "Failed to set signal handler");
137 }
138
139 ret = raise(SIGNAL);
140
141 if (ret != 0) {
142 UNRESOLVED(ret, "Failed to raise SIGALRM");
143 }
144
145 while (called != 4)
146 sched_yield();
147
148 /* Test passed */
149 #if VERBOSE > 0
150
151 output("Test passed\n");
152
153 #endif
154
155 PASSED;
156 }
157