summaryrefslogtreecommitdiff
path: root/nptl/tst-cancel17.c
blob: e061d501c8a8469c5882a3da96332bf8d7eee29d (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
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
/* Copyright (C) 2003-2018 Free Software Foundation, Inc.
   This file is part of the GNU C Library.
   Contributed by Ulrich Drepper <drepper@redhat.com>, 2003.

   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 <aio.h>
#include <errno.h>
#include <pthread.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>


static pthread_barrier_t b;


/* Cleanup handling test.  */
static int cl_called;

static void
cl (void *arg)
{
  ++cl_called;
}


static void *
tf (void *arg)
{
  int r = pthread_barrier_wait (&b);
  if (r != 0 && r != PTHREAD_BARRIER_SERIAL_THREAD)
    {
      puts ("tf: barrier_wait failed");
      exit (1);
    }

  pthread_cleanup_push (cl, NULL);

  const struct aiocb *l[1] = { arg };

  TEMP_FAILURE_RETRY (aio_suspend (l, 1, NULL));

  pthread_cleanup_pop (0);

  puts ("tf: aio_suspend returned");

  exit (1);
}


static void *
tf2 (void *arg)
{
  int r = pthread_barrier_wait (&b);
  if (r != 0 && r != PTHREAD_BARRIER_SERIAL_THREAD)
    {
      puts ("tf2: barrier_wait failed");
      exit (1);
    }

  pthread_cleanup_push (cl, NULL);

  const struct aiocb *l[1] = { arg };
  struct timespec ts = { .tv_sec = 1000, .tv_nsec = 0 };

  TEMP_FAILURE_RETRY (aio_suspend (l, 1, &ts));

  pthread_cleanup_pop (0);

  puts ("tf2: aio_suspend returned");

  exit (1);
}


static int
do_test (void)
{
  int fds[2];
  if (pipe (fds) != 0)
    {
      puts ("pipe failed");
      return 1;
    }

  struct aiocb a, a2, *ap;
  char mem[1];
  memset (&a, '\0', sizeof (a));
  a.aio_fildes = fds[0];
  a.aio_buf = mem;
  a.aio_nbytes = sizeof (mem);
  if (aio_read (&a) != 0)
    {
      puts ("aio_read failed");
      return 1;
    }

  if (pthread_barrier_init (&b, NULL, 2) != 0)
    {
      puts ("barrier_init failed");
      return 1;
    }

  pthread_t th;
  if (pthread_create (&th, NULL, tf, &a) != 0)
    {
      puts ("1st create failed");
      return 1;
    }

  int r = pthread_barrier_wait (&b);
  if (r != 0 && r != PTHREAD_BARRIER_SERIAL_THREAD)
    {
      puts ("barrier_wait failed");
      exit (1);
    }

  struct timespec  ts = { .tv_sec = 0, .tv_nsec = 100000000 };
  while (nanosleep (&ts, &ts) != 0)
    continue;

  puts ("going to cancel tf in-time");
  if (pthread_cancel (th) != 0)
    {
      puts ("1st cancel failed");
      return 1;
    }

  void *status;
  if (pthread_join (th, &status) != 0)
    {
      puts ("1st join failed");
      return 1;
    }
  if (status != PTHREAD_CANCELED)
    {
      puts ("1st thread not canceled");
      return 1;
    }

  if (cl_called == 0)
    {
      puts ("tf cleanup handler not called");
      return 1;
    }
  if (cl_called > 1)
    {
      puts ("tf cleanup handler called more than once");
      return 1;
    }

  cl_called = 0;

  if (pthread_create (&th, NULL, tf2, &a) != 0)
    {
      puts ("2nd create failed");
      return 1;
    }

  r = pthread_barrier_wait (&b);
  if (r != 0 && r != PTHREAD_BARRIER_SERIAL_THREAD)
    {
      puts ("2nd barrier_wait failed");
      exit (1);
    }

  ts.tv_sec = 0;
  ts.tv_nsec = 100000000;
  while (nanosleep (&ts, &ts) != 0)
    continue;

  puts ("going to cancel tf2 in-time");
  if (pthread_cancel (th) != 0)
    {
      puts ("2nd cancel failed");
      return 1;
    }

  if (pthread_join (th, &status) != 0)
    {
      puts ("2nd join failed");
      return 1;
    }
  if (status != PTHREAD_CANCELED)
    {
      puts ("2nd thread not canceled");
      return 1;
    }

  if (cl_called == 0)
    {
      puts ("tf2 cleanup handler not called");
      return 1;
    }
  if (cl_called > 1)
    {
      puts ("tf2 cleanup handler called more than once");
      return 1;
    }

  puts ("in-time cancellation succeeded");

  ap = &a;
  if (aio_cancel (fds[0], &a) != AIO_CANCELED)
    {
      puts ("aio_cancel failed");
      /* If aio_cancel failed, we cannot reuse aiocb a.  */
      ap = &a2;
    }


  cl_called = 0;

  size_t len2 = fpathconf (fds[1], _PC_PIPE_BUF);
  size_t page_size = sysconf (_SC_PAGESIZE);
  len2 = 20 * (len2 < page_size ? page_size : len2) + sizeof (mem) + 1;
  char *mem2 = malloc (len2);
  if (mem2 == NULL)
    {
      puts ("could not allocate memory for pipe write");
      return 1;
    }

  memset (ap, '\0', sizeof (*ap));
  ap->aio_fildes = fds[1];
  ap->aio_buf = mem2;
  ap->aio_nbytes = len2;
  if (aio_write (ap) != 0)
    {
      puts ("aio_write failed");
      return 1;
    }

  if (pthread_create (&th, NULL, tf, ap) != 0)
    {
      puts ("3rd create failed");
      return 1;
    }

  puts ("going to cancel tf early");
  if (pthread_cancel (th) != 0)
    {
      puts ("3rd cancel failed");
      return 1;
    }

  r = pthread_barrier_wait (&b);
  if (r != 0 && r != PTHREAD_BARRIER_SERIAL_THREAD)
    {
      puts ("3rd barrier_wait failed");
      exit (1);
    }

  if (pthread_join (th, &status) != 0)
    {
      puts ("3rd join failed");
      return 1;
    }
  if (status != PTHREAD_CANCELED)
    {
      puts ("3rd thread not canceled");
      return 1;
    }

  if (cl_called == 0)
    {
      puts ("tf cleanup handler not called");
      return 1;
    }
  if (cl_called > 1)
    {
      puts ("tf cleanup handler called more than once");
      return 1;
    }

  cl_called = 0;

  if (pthread_create (&th, NULL, tf2, ap) != 0)
    {
      puts ("4th create failed");
      return 1;
    }

  puts ("going to cancel tf2 early");
  if (pthread_cancel (th) != 0)
    {
      puts ("4th cancel failed");
      return 1;
    }

  r = pthread_barrier_wait (&b);
  if (r != 0 && r != PTHREAD_BARRIER_SERIAL_THREAD)
    {
      puts ("4th barrier_wait failed");
      exit (1);
    }

  if (pthread_join (th, &status) != 0)
    {
      puts ("4th join failed");
      return 1;
    }
  if (status != PTHREAD_CANCELED)
    {
      puts ("4th thread not canceled");
      return 1;
    }

  if (cl_called == 0)
    {
      puts ("tf2 cleanup handler not called");
      return 1;
    }
  if (cl_called > 1)
    {
      puts ("tf2 cleanup handler called more than once");
      return 1;
    }

  puts ("early cancellation succeeded");

  if (ap == &a2)
    {
      /* The aio_read(&a) was not canceled because the read request was
	 already in progress. In the meanwhile aio_write(ap) wrote something
	 to the pipe and the read request either has already been finished or
	 is able to read the requested byte.
	 Wait for the read request before returning from this function because
	 the return value and error code from the read syscall will be written
	 to the struct aiocb a, which lies on the stack of this function.
	 Otherwise the stack from subsequent function calls - e.g. _dl_fini -
	 will be corrupted, which can lead to undefined behaviour like a
	 segmentation fault.  */
      const struct aiocb *l[1] = { &a };
      TEMP_FAILURE_RETRY (aio_suspend(l, 1, NULL));
    }

  return 0;
}

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