1 /*
2 * Copyright (c) 2004, 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 stress test aims to test the following assertion:
18
19 * The init_routine from pthread_once never execute
20 * more or less than once.
21
22 * The steps are:
23 * -> Create several threads
24 * -> All threads call pthread_once at the same time
25 * -> Check the init_routine executed once.
26
27 */
28
29 /********************************************************************************************/
30 /****************************** standard includes *****************************************/
31 /********************************************************************************************/
32 #include <pthread.h>
33 #include <stdarg.h>
34 #include <stdio.h>
35 #include <stdlib.h>
36 #include <string.h>
37 #include <unistd.h>
38
39 #include <errno.h>
40 #include <signal.h>
41
42 /********************************************************************************************/
43 /****************************** Test framework *****************************************/
44 /********************************************************************************************/
45 #include "testfrmw.h"
46 #include "testfrmw.c"
47 /* This header is responsible for defining the following macros:
48 * UNRESOLVED(ret, descr);
49 * where descr is a description of the error and ret is an int (error code for example)
50 * FAILED(descr);
51 * where descr is a short text saying why the test has failed.
52 * PASSED();
53 * No parameter.
54 *
55 * Both three macros shall terminate the calling process.
56 * The testcase shall not terminate in any other maneer.
57 *
58 * The other file defines the functions
59 * void output_init()
60 * void output(char * string, ...)
61 *
62 * Those may be used to output information.
63 */
64
65 /********************************************************************************************/
66 /********************************** Configuration ******************************************/
67 /********************************************************************************************/
68 #ifndef VERBOSE
69 #define VERBOSE 1
70 #endif
71
72 #define NTHREADS 30
73
74 /********************************************************************************************/
75 /*********************************** Test cases *****************************************/
76 /********************************************************************************************/
77
78 static char do_it = 1;
79 static long long iterations = 0;
80
81 /* Handler for user request to terminate */
sighdl(int sig)82 static void sighdl(int sig)
83 {
84 do {
85 do_it = 0;
86 }
87 while (do_it);
88 }
89
90 static pthread_once_t once_ctl;
91 static int once_chk;
92 static pthread_mutex_t mtx = PTHREAD_MUTEX_INITIALIZER;
93
init_routine(void)94 static void init_routine(void)
95 {
96 int ret = 0;
97 ret = pthread_mutex_lock(&mtx);
98
99 if (ret != 0) {
100 UNRESOLVED(ret, "Failed to lock mutex in initializer");
101 }
102
103 once_chk++;
104
105 ret = pthread_mutex_unlock(&mtx);
106
107 if (ret != 0) {
108 UNRESOLVED(ret, "Failed to unlock mutex in initializer");
109 }
110
111 return;
112 }
113
114 /* Thread function */
threaded(void * arg)115 static void *threaded(void *arg)
116 {
117 int ret = 0;
118
119 /* Wait for all threads being created */
120 ret = pthread_barrier_wait(arg);
121
122 if ((ret != 0) && (ret != PTHREAD_BARRIER_SERIAL_THREAD)) {
123 UNRESOLVED(ret, "Barrier wait failed");
124 }
125
126 /* Call init routine */
127 ret = pthread_once(&once_ctl, init_routine);
128
129 if (ret != 0) {
130 UNRESOLVED(ret, "pthread_once failed");
131 }
132
133 return NULL;
134 }
135
136 /* Main function */
main(int argc,char * argv[])137 int main(int argc, char *argv[])
138 {
139 int ret = 0, i;
140
141 struct sigaction sa;
142
143 pthread_barrier_t bar;
144
145 pthread_t th[NTHREADS];
146
147 /* Initialize output routine */
148 output_init();
149
150 /* Initialize barrier */
151 ret = pthread_barrier_init(&bar, NULL, NTHREADS);
152
153 if (ret != 0) {
154 UNRESOLVED(ret, "Failed to init barrier");
155 }
156
157 /* Register the signal handler for SIGUSR1 */
158 sigemptyset(&sa.sa_mask);
159
160 sa.sa_flags = 0;
161
162 sa.sa_handler = sighdl;
163
164 if ((ret = sigaction(SIGUSR1, &sa, NULL))) {
165 UNRESOLVED(ret, "Unable to register signal handler");
166 }
167
168 if ((ret = sigaction(SIGALRM, &sa, NULL))) {
169 UNRESOLVED(ret, "Unable to register signal handler");
170 }
171 #if VERBOSE > 1
172 output("[parent] Signal handler registered\n");
173
174 #endif
175
176 while (do_it) {
177 /* Reinitialize once handler & check value */
178 once_ctl = PTHREAD_ONCE_INIT;
179 once_chk = 0;
180
181 /* create the threads */
182
183 for (i = 0; i < NTHREADS; i++) {
184 ret = pthread_create(&th[i], NULL, threaded, &bar);
185
186 if (ret != 0) {
187 UNRESOLVED(ret, "Failed to create a thread");
188 }
189 }
190
191 /* Then join */
192 for (i = 0; i < NTHREADS; i++) {
193 ret = pthread_join(th[i], NULL);
194
195 if (ret != 0) {
196 UNRESOLVED(ret, "Failed to join a thread");
197 }
198 }
199
200 /* check the value */
201 ret = pthread_mutex_lock(&mtx);
202
203 if (ret != 0) {
204 UNRESOLVED(ret, "Failed to lock mutex in initializer");
205 }
206
207 if (once_chk != 1) {
208 output("Control: %d\n", once_chk);
209 FAILED("The initializer function did not execute once");
210 }
211
212 ret = pthread_mutex_unlock(&mtx);
213
214 if (ret != 0) {
215 UNRESOLVED(ret,
216 "Failed to unlock mutex in initializer");
217 }
218
219 iterations++;
220 }
221
222 /* We've been asked to stop */
223
224 output("pthread_once stress test PASSED -- %llu iterations\n",
225 iterations);
226
227 ret = pthread_barrier_destroy(&bar);
228
229 if (ret != 0) {
230 UNRESOLVED(ret, "Failed to destroy the barrier");
231 }
232
233 PASSED;
234 }
235