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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 /* We are testing conformance to IEEE Std 1003.1, 2003 Edition */
31 #define _POSIX_C_SOURCE 200112L
32 
33 /******************************************************************************/
34 /*************************** standard includes ********************************/
35 /******************************************************************************/
36 #include <pthread.h>
37 #include <stdarg.h>
38 #include <stdio.h>
39 #include <stdlib.h>
40 #include <string.h>
41 #include <unistd.h>
42 
43 #include <signal.h>
44 #include <errno.h>
45 
46 /******************************************************************************/
47 /***************************   Test framework   *******************************/
48 /******************************************************************************/
49 #include "../testfrmw/testfrmw.h"
50 #include "../testfrmw/testfrmw.c"
51 /* This header is responsible for defining the following macros:
52  * UNRESOLVED(ret, descr);
53  *    where descr is a description of the error and ret is an int
54  *   (error code for example)
55  * FAILED(descr);
56  *    where descr is a short text saying why the test has failed.
57  * PASSED();
58  *    No parameter.
59  *
60  * Both three macros shall terminate the calling process.
61  * The testcase shall not terminate in any other maneer.
62  *
63  * The other file defines the functions
64  * void output_init()
65  * void output(char * string, ...)
66  *
67  * Those may be used to output information.
68  */
69 
70 /******************************************************************************/
71 /**************************** Configuration ***********************************/
72 /******************************************************************************/
73 #ifndef VERBOSE
74 #define VERBOSE 1
75 #endif
76 
77 #define SIGNAL SIGSEGV
78 
79 /******************************************************************************/
80 /***************************    Test case   ***********************************/
81 /******************************************************************************/
82 
83 int called = 0;
84 
handler(int sig)85 void handler(int sig)
86 {
87 	int ret;
88 	sigset_t pending;
89 	called++;
90 
91 	if (called == 2) {
92 		FAILED("Signal was not masked in signal handler");
93 	}
94 
95 	if (called == 1) {
96 
97 		/* Raise the signal again. It should be masked */
98 		ret = raise(SIGNAL);
99 
100 		if (ret != 0) {
101 			UNRESOLVED(ret, "Failed to raise SIGSEGV again");
102 		}
103 
104 		/* check the signal is pending */
105 		ret = sigpending(&pending);
106 
107 		if (ret != 0) {
108 			UNRESOLVED(ret, "Failed to get pending signal set");
109 		}
110 
111 		ret = sigismember(&pending, SIGNAL);
112 
113 		if (ret != 1) {
114 			FAILED("signal is not pending");
115 		}
116 	}
117 
118 	called++;
119 }
120 
121 /* main function */
main(void)122 int main(void)
123 {
124 	int ret;
125 
126 	struct sigaction sa;
127 
128 	/* Initialize output */
129 	output_init();
130 
131 	/* Set the signal handler */
132 	sa.sa_flags = 0;
133 
134 	sa.sa_handler = handler;
135 
136 	ret = sigemptyset(&sa.sa_mask);
137 
138 	if (ret != 0) {
139 		UNRESOLVED(ret, "Failed to empty signal set");
140 	}
141 
142 	/* Install the signal handler for SIGSEGV */
143 	ret = sigaction(SIGNAL, &sa, 0);
144 
145 	if (ret != 0) {
146 		UNRESOLVED(ret, "Failed to set signal handler");
147 	}
148 
149 	ret = raise(SIGNAL);
150 
151 	if (ret != 0) {
152 		UNRESOLVED(ret, "Failed to raise SIGSEGV");
153 	}
154 
155 	while (called != 4)
156 		sched_yield();
157 
158 	/* Test passed */
159 #if VERBOSE > 0
160 
161 	output("Test passed\n");
162 
163 #endif
164 
165 	PASSED;
166 }
167