summaryrefslogtreecommitdiff
path: root/nptl/tst-signal3.c
blob: fbd9ace8edf1986fc99caa502c1e1b77e26c584b (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
/* Copyright (C) 2002, 2003, 2004 Free Software Foundation, Inc.
   This file is part of the GNU C Library.
   Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.

   The GNU C Library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Lesser General Public
   License as published by the Free Software Foundation; either
   version 2.1 of the License, or (at your option) any later version.

   The GNU C Library is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   Lesser General Public License for more details.

   You should have received a copy of the GNU Lesser General Public
   License along with the GNU C Library; if not, see
   <http://www.gnu.org/licenses/>.  */

#include <errno.h>
#include <pthread.h>
#include <semaphore.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>


/* Number of different signalss to use.  Also is the number of
   threads.  */
#define N 10
/* Maximum number of threads in flight at any one time.  */
#define INFLIGHT 5
/* Number of signals sent in total.  */
#define ROUNDS 10000


static int received[N][N];
static int nsig[N];
static pthread_t th[N];
static sem_t sem;
static pthread_mutex_t lock[N];
static pthread_t th_main;
static int sig0;

static void
handler (int sig)
{
  int i;
  for (i = 0; i < N; ++i)
    if (pthread_equal (pthread_self (), th[i]))
      break;

  if (i == N)
    {
      if (pthread_equal (pthread_self (), th_main))
	puts ("signal received by main thread");
      else
	printf ("signal received by unknown thread (%lx)\n",
		(unsigned long int) pthread_self ());
      exit (1);
    }

  ++received[i][sig - sig0];

  sem_post (&sem);
}


static void *
tf (void *arg)
{
  int idx = (long int) arg;

  sigset_t ss;
  sigemptyset (&ss);

  int i;
  for (i = 0; i <= idx; ++i)
    sigaddset (&ss, sig0 + i);

  if (pthread_sigmask (SIG_UNBLOCK, &ss, NULL) != 0)
    {
      printf ("thread %d: pthread_sigmask failed\n", i);
      exit (1);
    }

  pthread_mutex_lock (&lock[idx]);

  return NULL;
}


static int
do_test (void)
{
  /* Block all signals.  */
  sigset_t ss;
  sigfillset (&ss);

  th_main = pthread_self ();

  sig0 = SIGRTMIN;

  if (pthread_sigmask (SIG_SETMASK, &ss, NULL) != 0)
    {
      puts ("1st pthread_sigmask failed");
      exit (1);
    }

  /* Install the handler.  */
  int i;
  for (i = 0; i < N; ++i)
    {
      struct sigaction sa =
	{
	  .sa_handler = handler,
	  .sa_flags = 0
	};
      sigfillset (&sa.sa_mask);

      if (sigaction (sig0 + i, &sa, NULL) != 0)
	{
	  printf ("sigaction for signal %d failed\n", i);
	  exit (1);
	}
    }

  if (sem_init (&sem, 0, INFLIGHT) != 0)
    {
      puts ("sem_init failed");
      exit (1);
    }

  pthread_attr_t a;

  if (pthread_attr_init (&a) != 0)
    {
      puts ("attr_init failed");
      exit (1);
    }

  if (pthread_attr_setstacksize (&a, 1 * 1024 * 1024) != 0)
    {
      puts ("attr_setstacksize failed");
      return 1;
    }

  for (i = 0; i < N; ++i)
    {
      if (pthread_mutex_init (&lock[i], NULL) != 0)
	{
	  printf ("mutex_init[%d] failed\n", i);
	}

      if (pthread_mutex_lock (&lock[i]) != 0)
	{
	  printf ("mutex_lock[%d] failed\n", i);
	}

      if (pthread_create (&th[i], &a, tf, (void *) (long int) i) != 0)
	{
	  printf ("create of thread %d failed\n", i);
	  exit (1);
	}
    }

  if (pthread_attr_destroy (&a) != 0)
    {
      puts ("attr_destroy failed");
      exit (1);
    }

  int result = 0;
  unsigned int r = 42;
  pid_t pid = getpid ();

  for (i = 0; i < ROUNDS; ++i)
    {
      if (TEMP_FAILURE_RETRY (sem_wait (&sem)) != 0)
	{
	  printf ("sem_wait round %d failed: %m\n", i);
	  exit (1);
	}

      int s = rand_r (&r) % N;

      kill (pid, sig0 + s);
    }

  void *status;
  for (i = 0; i < N; ++i)
    {
      if (pthread_mutex_unlock (&lock[i]) != 0)
	{
	  printf ("unlock %d failed\n", i);
	  exit (1);
	}

      if (pthread_join (th[i], &status) != 0)
	{
	  printf ("join %d failed\n", i);
	  result = 1;
	}
      else if (status != NULL)
	{
	  printf ("%d: result != NULL\n", i);
	  result = 1;
	}
    }

  int total = 0;
  for (i = 0; i < N; ++i)
    {
      int j;

      for (j = 0; j <= i; ++j)
	total += received[i][j];

      for (j = i + 1; j < N; ++j)
	if (received[i][j] != 0)
	  {
	    printf ("thread %d received signal SIGRTMIN+%d\n", i, j);
	    result = 1;
	  }
    }

  if (total != ROUNDS)
    {
      printf ("total number of handled signals is %d, expected %d\n",
	      total, ROUNDS);
      result = 1;
    }

  printf ("A total of %d signals sent and received\n", total);
  for (i = 0; i < N; ++i)
    {
      printf ("thread %2d:", i);

      int j;
      for (j = 0; j <= i; ++j)
	{
	  printf (" %5d", received[i][j]);
	  nsig[j] += received[i][j];
	}

      putchar ('\n');

    }

  printf ("\nTotal    :");
  for (i = 0; i < N; ++i)
    printf (" %5d", nsig[i]);
  putchar ('\n');

  return result;
}

#define TIMEOUT 10
#define TEST_FUNCTION do_test ()
#include "../test-skeleton.c"