nptl/tst-cond25.c

   1 /* Verify that condition variables synchronized by PI mutexes don't hang on
   2    on cancellation.
   3    Copyright (C) 2012-2014 Free Software Foundation, Inc.
   4    This file is part of the GNU C Library.
   5
   6    The GNU C Library is free software; you can redistribute it and/or
   7    modify it under the terms of the GNU Lesser General Public
   8    License as published by the Free Software Foundation; either
   9    version 2.1 of the License, or (at your option) any later version.
  10
  11    The GNU C Library is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14    Lesser General Public License for more details.
  15
  16    You should have received a copy of the GNU Lesser General Public
  17    License along with the GNU C Library; if not, see
  18    <http://www.gnu.org/licenses/>.  */
  19
  20 #include <pthread.h>
  21 #include <stdio.h>
  22 #include <stdlib.h>
  23 #include <stdint.h>
  24 #include <string.h>
  25 #include <errno.h>
  26 #include <sys/types.h>
  27 #include <sys/syscall.h>
  28 #include <unistd.h>
  29 #include <sys/time.h>
  30 #include <time.h>
  31
  32 #define NUM 5
  33 #define ITERS 10000
  34 #define COUNT 100
  35
  36 typedef void *(*thr_func) (void *);
  37
  38 pthread_mutex_t mutex;
  39 pthread_cond_t cond;
  40
  41 void cleanup (void *u)
  42 {
  43   /* pthread_cond_wait should always return with the mutex locked.  */
  44   if (pthread_mutex_unlock (&mutex))
  45     abort ();
  46 }
  47
  48 void *
  49 signaller (void *u)
  50 {
  51   int i, ret = 0;
  52   void *tret = NULL;
  53
  54   for (i = 0; i < ITERS; i++)
  55     {
  56       if ((ret = pthread_mutex_lock (&mutex)) != 0)
  57         {
  58           tret = (void *)1;
  59           printf ("signaller:mutex_lock failed: %s\n", strerror (ret));
  60           goto out;
  61         }
  62       if ((ret = pthread_cond_signal (&cond)) != 0)
  63         {
  64           tret = (void *)1;
  65           printf ("signaller:signal failed: %s\n", strerror (ret));
  66           goto unlock_out;
  67         }
  68       if ((ret = pthread_mutex_unlock (&mutex)) != 0)
  69         {
  70           tret = (void *)1;
  71           printf ("signaller:mutex_unlock failed: %s\n", strerror (ret));
  72           goto out;
  73         }
  74       pthread_testcancel ();
  75     }
  76
  77 out:
  78   return tret;
  79
  80 unlock_out:
  81   if ((ret = pthread_mutex_unlock (&mutex)) != 0)
  82     printf ("signaller:mutex_unlock[2] failed: %s\n", strerror (ret));
  83   goto out;
  84 }
  85
  86 void *
  87 waiter (void *u)
  88 {
  89   int i, ret = 0;
  90   void *tret = NULL;
  91   int seq = (uintptr_t) u;
  92
  93   for (i = 0; i < ITERS / NUM; i++)
  94     {
  95       if ((ret = pthread_mutex_lock (&mutex)) != 0)
  96         {
  97           tret = (void *) (uintptr_t) 1;
  98           printf ("waiter[%u]:mutex_lock failed: %s\n", seq, strerror (ret));
  99           goto out;
 100         }
 101       pthread_cleanup_push (cleanup, NULL);
 102
 103       if ((ret = pthread_cond_wait (&cond, &mutex)) != 0)
 104         {
 105           tret = (void *) (uintptr_t) 1;
 106           printf ("waiter[%u]:wait failed: %s\n", seq, strerror (ret));
 107           goto unlock_out;
 108         }
 109
 110       if ((ret = pthread_mutex_unlock (&mutex)) != 0)
 111         {
 112           tret = (void *) (uintptr_t) 1;
 113           printf ("waiter[%u]:mutex_unlock failed: %s\n", seq, strerror (ret));
 114           goto out;
 115         }
 116       pthread_cleanup_pop (0);
 117     }
 118
 119 out:
 120   puts ("waiter tests done");
 121   return tret;
 122
 123 unlock_out:
 124   if ((ret = pthread_mutex_unlock (&mutex)) != 0)
 125     printf ("waiter:mutex_unlock[2] failed: %s\n", strerror (ret));
 126   goto out;
 127 }
 128
 129 void *
 130 timed_waiter (void *u)
 131 {
 132   int i, ret;
 133   void *tret = NULL;
 134   int seq = (uintptr_t) u;
 135
 136   for (i = 0; i < ITERS / NUM; i++)
 137     {
 138       struct timespec ts;
 139
 140       if ((ret = clock_gettime(CLOCK_REALTIME, &ts)) != 0)
 141         {
 142           tret = (void *) (uintptr_t) 1;
 143           printf ("%u:clock_gettime failed: %s\n", seq, strerror (errno));
 144           goto out;
 145         }
 146       ts.tv_sec += 20;
 147
 148       if ((ret = pthread_mutex_lock (&mutex)) != 0)
 149         {
 150           tret = (void *) (uintptr_t) 1;
 151           printf ("waiter[%u]:mutex_lock failed: %s\n", seq, strerror (ret));
 152           goto out;
 153         }
 154       pthread_cleanup_push (cleanup, NULL);
 155
 156       /* We should not time out either.  */
 157       if ((ret = pthread_cond_timedwait (&cond, &mutex, &ts)) != 0)
 158         {
 159           tret = (void *) (uintptr_t) 1;
 160           printf ("waiter[%u]:timedwait failed: %s\n", seq, strerror (ret));
 161           goto unlock_out;
 162         }
 163       if ((ret = pthread_mutex_unlock (&mutex)) != 0)
 164         {
 165           tret = (void *) (uintptr_t) 1;
 166           printf ("waiter[%u]:mutex_unlock failed: %s\n", seq, strerror (ret));
 167           goto out;
 168         }
 169       pthread_cleanup_pop (0);
 170     }
 171
 172 out:
 173   puts ("timed_waiter tests done");
 174   return tret;
 175
 176 unlock_out:
 177   if ((ret = pthread_mutex_unlock (&mutex)) != 0)
 178     printf ("waiter[%u]:mutex_unlock[2] failed: %s\n", seq, strerror (ret));
 179   goto out;
 180 }
 181
 182 int
 183 do_test_wait (thr_func f)
 184 {
 185   pthread_t w[NUM];
 186   pthread_t s;
 187   pthread_mutexattr_t attr;
 188   int i, j, ret = 0;
 189   void *thr_ret;
 190
 191   for (i = 0; i < COUNT; i++)
 192     {
 193       if ((ret = pthread_mutexattr_init (&attr)) != 0)
 194         {
 195           printf ("mutexattr_init failed: %s\n", strerror (ret));
 196           goto out;
 197         }
 198
 199       if ((ret = pthread_mutexattr_setprotocol (&attr,
 200                                                 PTHREAD_PRIO_INHERIT)) != 0)
 201         {
 202           printf ("mutexattr_setprotocol failed: %s\n", strerror (ret));
 203           goto out;
 204         }
 205
 206       if ((ret = pthread_cond_init (&cond, NULL)) != 0)
 207         {
 208           printf ("cond_init failed: %s\n", strerror (ret));
 209           goto out;
 210         }
 211
 212       if ((ret = pthread_mutex_init (&mutex, &attr)) != 0)
 213         {
 214           printf ("mutex_init failed: %s\n", strerror (ret));
 215           goto out;
 216         }
 217
 218       for (j = 0; j < NUM; j++)
 219         if ((ret = pthread_create (&w[j], NULL,
 220                                    f, (void *) (uintptr_t) j)) != 0)
 221           {
 222             printf ("waiter[%d]: create failed: %s\n", j, strerror (ret));
 223             goto out;
 224           }
 225
 226       if ((ret = pthread_create (&s, NULL, signaller, NULL)) != 0)
 227         {
 228           printf ("signaller: create failed: %s\n", strerror (ret));
 229           goto out;
 230         }
 231
 232       for (j = 0; j < NUM; j++)
 233         {
 234           pthread_cancel (w[j]);
 235
 236           if ((ret = pthread_join (w[j], &thr_ret)) != 0)
 237             {
 238               printf ("waiter[%d]: join failed: %s\n", j, strerror (ret));
 239               goto out;
 240             }
 241
 242           if (thr_ret != NULL && thr_ret != PTHREAD_CANCELED)
 243             {
 244               ret = 1;
 245               goto out;
 246             }
 247         }
 248
 249       /* The signalling thread could have ended before it was cancelled.  */
 250       pthread_cancel (s);
 251
 252       if ((ret = pthread_join (s, &thr_ret)) != 0)
 253         {
 254           printf ("signaller: join failed: %s\n", strerror (ret));
 255           goto out;
 256         }
 257
 258       if (thr_ret != NULL && thr_ret != PTHREAD_CANCELED)
 259         {
 260           ret = 1;
 261           goto out;
 262         }
 263     }
 264
 265 out:
 266   return ret;
 267 }
 268
 269 int
 270 do_test (int argc, char **argv)
 271 {
 272   int ret = do_test_wait (waiter);
 273
 274   if (ret)
 275     return ret;
 276
 277   return do_test_wait (timed_waiter);
 278 }
 279
 280 #define TIMEOUT 5
 281 #include "../test-skeleton.c"