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., 59
15* Temple Place - Suite 330, Boston MA 02111-1307, USA.
16
17
18* This sample test aims to check the following assertions:
19*
20* If SA_NODEFER is not set in sa_flags, the caught signal is added to the
21* thread's signal mask during the handler execution.
22
23* The steps are:
24* -> register a signal handler for SIGFPE
25* -> raise SIGFPE
26* -> In handler, check for reentrance then raise SIGFPE again.
27
28* The test fails if signal handler if reentered or signal is not pending when raised again.
29*/
30
31
32/* We are testing conformance to IEEE Std 1003.1, 2003 Edition */
33#define _POSIX_C_SOURCE 200112L
34
35/******************************************************************************/
36/*************************** standard includes ********************************/
37/******************************************************************************/
38#include <pthread.h>
39#include <stdarg.h>
40#include <stdio.h>
41#include <stdlib.h>
42#include <string.h>
43#include <unistd.h>
44
45#include <signal.h>
46#include <errno.h>
47
48/******************************************************************************/
49/***************************   Test framework   *******************************/
50/******************************************************************************/
51#include "testfrmw.h"
52#include "testfrmw.c"
53/* This header is responsible for defining the following macros:
54 * UNRESOLVED(ret, descr);
55 *    where descr is a description of the error and ret is an int
56 *   (error code for example)
57 * FAILED(descr);
58 *    where descr is a short text saying why the test has failed.
59 * PASSED();
60 *    No parameter.
61 *
62 * Both three macros shall terminate the calling process.
63 * The testcase shall not terminate in any other maneer.
64 *
65 * The other file defines the functions
66 * void output_init()
67 * void output(char * string, ...)
68 *
69 * Those may be used to output information.
70 */
71
72/******************************************************************************/
73/**************************** Configuration ***********************************/
74/******************************************************************************/
75#ifndef VERBOSE
76#define VERBOSE 1
77#endif
78
79#define SIGNAL SIGFPE
80
81/******************************************************************************/
82/***************************    Test case   ***********************************/
83/******************************************************************************/
84
85int called = 0;
86
87void handler( int sig )
88{
89	int ret;
90	sigset_t pending;
91	called++;
92
93	if ( called == 2 )
94	{
95		FAILED( "Signal was not masked in signal handler" );
96	}
97
98	if ( called == 1 )
99	{
100
101		/* Raise the signal again. It should be masked */
102		ret = raise( SIGNAL );
103
104		if ( ret != 0 )
105		{
106			UNRESOLVED( ret, "Failed to raise SIGFPE again" );
107		}
108
109		/* check the signal is pending */
110		ret = sigpending( &pending );
111
112		if ( ret != 0 )
113		{
114			UNRESOLVED( ret, "Failed to get pending signal set" );
115		}
116
117		ret = sigismember( &pending, SIGNAL );
118
119		if ( ret != 1 )
120		{
121			FAILED( "signal is not pending" );
122		}
123	}
124
125	called++;
126}
127
128/* main function */
129int main()
130{
131	int ret;
132
133	struct sigaction sa;
134
135	/* Initialize output */
136	output_init();
137
138	/* Set the signal handler */
139	sa.sa_flags = 0;
140
141	sa.sa_handler = handler;
142
143	ret = sigemptyset( &sa.sa_mask );
144
145	if ( ret != 0 )
146	{
147		UNRESOLVED( ret, "Failed to empty signal set" );
148	}
149
150	/* Install the signal handler for SIGFPE */
151	ret = sigaction( SIGNAL, &sa, 0 );
152
153	if ( ret != 0 )
154	{
155		UNRESOLVED( ret, "Failed to set signal handler" );
156	}
157
158	ret = raise( SIGNAL );
159
160	if ( ret != 0 )
161	{
162		UNRESOLVED( ret, "Failed to raise SIGFPE" );
163	}
164
165	while ( called != 4 )
166		sched_yield();
167
168	/* Test passed */
169#if VERBOSE > 0
170
171	output( "Test passed\n" );
172
173#endif
174
175	PASSED;
176}
177