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1/* Copyright (C) 2002-2019 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
3 Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
4
5 The GNU C Library is free software; you can redistribute it and/or
6 modify it under the terms of the GNU Lesser General Public
7 License as published by the Free Software Foundation; either
8 version 2.1 of the License, or (at your option) any later version.
9
10 The GNU C Library is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
14
15 You should have received a copy of the GNU Lesser General Public
16 License along with the GNU C Library; if not, see
17 <http://www.gnu.org/licenses/>. */
18
19#include <errno.h>
20#include <pthread.h>
21#include <semaphore.h>
22#include <signal.h>
23#include <stdio.h>
24#include <stdlib.h>
25#include <unistd.h>
26
27
28#ifdef SIGRTMIN
29
30/* Number of different signals to use. Also is the number of threads. */
31# define N 10
32/* Maximum number of threads in flight at any one time. */
33# define INFLIGHT 5
34/* Number of signals sent in total. */
35# define ROUNDS 10000
36
37
38static int received[N][N];
39static int nsig[N];
40static pthread_t th[N];
41static sem_t sem;
42static pthread_mutex_t lock[N];
43static pthread_t th_main;
44static int sig0;
45
46static void
47handler (int sig)
48{
49 int i;
50 for (i = 0; i < N; ++i)
51 if (pthread_equal (pthread_self (), th[i]))
52 break;
53
54 if (i == N)
55 {
56 if (pthread_equal (pthread_self (), th_main))
57 puts ("signal received by main thread");
58 else
59 printf ("signal received by unknown thread (%lx)\n",
60 (unsigned long int) pthread_self ());
61 exit (1);
62 }
63
64 ++received[i][sig - sig0];
65
66 sem_post (&sem);
67}
68
69
70static void *
71tf (void *arg)
72{
73 int idx = (long int) arg;
74
75 sigset_t ss;
76 sigemptyset (&ss);
77
78 int i;
79 for (i = 0; i <= idx; ++i)
80 sigaddset (&ss, sig0 + i);
81
82 if (pthread_sigmask (SIG_UNBLOCK, &ss, NULL) != 0)
83 {
84 printf ("thread %d: pthread_sigmask failed\n", i);
85 exit (1);
86 }
87
88 pthread_mutex_lock (&lock[idx]);
89
90 return NULL;
91}
92
93
94static int
95do_test (void)
96{
97 /* Block all signals. */
98 sigset_t ss;
99 sigfillset (&ss);
100
101 th_main = pthread_self ();
102
103 sig0 = SIGRTMIN;
104
105 if (pthread_sigmask (SIG_SETMASK, &ss, NULL) != 0)
106 {
107 puts ("1st pthread_sigmask failed");
108 exit (1);
109 }
110
111 /* Install the handler. */
112 int i;
113 for (i = 0; i < N; ++i)
114 {
115 struct sigaction sa =
116 {
117 .sa_handler = handler,
118 .sa_flags = 0
119 };
120 sigfillset (&sa.sa_mask);
121
122 if (sigaction (sig0 + i, &sa, NULL) != 0)
123 {
124 printf ("sigaction for signal %d failed\n", i);
125 exit (1);
126 }
127 }
128
129 if (sem_init (&sem, 0, INFLIGHT) != 0)
130 {
131 puts ("sem_init failed");
132 exit (1);
133 }
134
135 pthread_attr_t a;
136
137 if (pthread_attr_init (&a) != 0)
138 {
139 puts ("attr_init failed");
140 exit (1);
141 }
142
143 if (pthread_attr_setstacksize (&a, 1 * 1024 * 1024) != 0)
144 {
145 puts ("attr_setstacksize failed");
146 return 1;
147 }
148
149 for (i = 0; i < N; ++i)
150 {
151 if (pthread_mutex_init (&lock[i], NULL) != 0)
152 {
153 printf ("mutex_init[%d] failed\n", i);
154 }
155
156 if (pthread_mutex_lock (&lock[i]) != 0)
157 {
158 printf ("mutex_lock[%d] failed\n", i);
159 }
160
161 if (pthread_create (&th[i], &a, tf, (void *) (long int) i) != 0)
162 {
163 printf ("create of thread %d failed\n", i);
164 exit (1);
165 }
166 }
167
168 if (pthread_attr_destroy (&a) != 0)
169 {
170 puts ("attr_destroy failed");
171 exit (1);
172 }
173
174 int result = 0;
175 unsigned int r = 42;
176 pid_t pid = getpid ();
177
178 for (i = 0; i < ROUNDS; ++i)
179 {
180 if (TEMP_FAILURE_RETRY (sem_wait (&sem)) != 0)
181 {
182 printf ("sem_wait round %d failed: %m\n", i);
183 exit (1);
184 }
185
186 int s = rand_r (&r) % N;
187
188 kill (pid, sig0 + s);
189 }
190
191 void *status;
192 for (i = 0; i < N; ++i)
193 {
194 if (pthread_mutex_unlock (&lock[i]) != 0)
195 {
196 printf ("unlock %d failed\n", i);
197 exit (1);
198 }
199
200 if (pthread_join (th[i], &status) != 0)
201 {
202 printf ("join %d failed\n", i);
203 result = 1;
204 }
205 else if (status != NULL)
206 {
207 printf ("%d: result != NULL\n", i);
208 result = 1;
209 }
210 }
211
212 int total = 0;
213 for (i = 0; i < N; ++i)
214 {
215 int j;
216
217 for (j = 0; j <= i; ++j)
218 total += received[i][j];
219
220 for (j = i + 1; j < N; ++j)
221 if (received[i][j] != 0)
222 {
223 printf ("thread %d received signal SIGRTMIN+%d\n", i, j);
224 result = 1;
225 }
226 }
227
228 if (total != ROUNDS)
229 {
230 printf ("total number of handled signals is %d, expected %d\n",
231 total, ROUNDS);
232 result = 1;
233 }
234
235 printf ("A total of %d signals sent and received\n", total);
236 for (i = 0; i < N; ++i)
237 {
238 printf ("thread %2d:", i);
239
240 int j;
241 for (j = 0; j <= i; ++j)
242 {
243 printf (" %5d", received[i][j]);
244 nsig[j] += received[i][j];
245 }
246
247 putchar ('\n');
248
249 }
250
251 printf ("\nTotal :");
252 for (i = 0; i < N; ++i)
253 printf (" %5d", nsig[i]);
254 putchar ('\n');
255
256 return result;
257}
258
259# define TEST_FUNCTION do_test ()
260
261#else
262# define TEST_FUNCTION 0
263#endif
264
265#include "../test-skeleton.c"
266

Warning: That file was not part of the compilation database. It may have many parsing errors.