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 SIGBUS
24* -> raise SIGBUS
25* -> In handler, check for reentrance then raise SIGBUS 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 SIGBUS
78
79/******************************************************************************/
80/***************************    Test case   ***********************************/
81/******************************************************************************/
82
83int called = 0;
84
85void 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 SIGBUS 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 */
122int 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 SIGBUS */
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 SIGBUS");
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