nptl/tst-join7mod.c

   1 /* Verify that TLS access in separate thread in a dlopened library does not
   2    deadlock - the module.
   3    Copyright (C) 2015-2017 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 <stdio.h>
  21 #include <string.h>
  22 #include <pthread.h>
  23 #include <atomic.h>
  24
  25 static pthread_t th;
  26 static int running = 1;
  27
  28 static void *
  29 test_run (void *p)
  30 {
  31   while (atomic_load_relaxed (&running))
  32     printf ("Test running\n");
  33   printf ("Test finished\n");
  34   return NULL;
  35 }
  36
  37 static void __attribute__ ((constructor))
  38 do_init (void)
  39 {
  40   int ret = pthread_create (&th, NULL, test_run, NULL);
  41
  42   if (ret != 0)
  43     {
  44       printf ("failed to create thread: %s (%d)\n", strerror (ret), ret);
  45       exit (1);
  46     }
  47 }
  48
  49 static void __attribute__ ((destructor))
  50 do_end (void)
  51 {
  52   atomic_store_relaxed (&running, 0);
  53   int ret = pthread_join (th, NULL);
  54
  55   if (ret != 0)
  56     {
  57       printf ("pthread_join: %s(%d)\n", strerror (ret), ret);
  58       exit (1);
  59     }
  60
  61   printf ("Thread joined\n");
  62 }