nptl/tst-cancel9.c

   1 /* Copyright (C) 2003-2020 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3    Contributed by Ulrich Drepper <drepper@redhat.com>, 2003.
   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    <https://www.gnu.org/licenses/>.  */
  18
  19 #include <fcntl.h>
  20 #include <pthread.h>
  21 #include <stdio.h>
  22 #include <stdlib.h>
  23 #include <string.h>
  24 #include <unistd.h>
  25
  26
  27 static pthread_barrier_t b;
  28
  29
  30 static void
  31 cleanup (void *arg)
  32 {
  33   fputs ("in cleanup\n", stdout);
  34 }
  35
  36
  37 static void *
  38 tf (void *arg)
  39 {
  40   int fd = open ("/dev/null", O_RDWR);
  41   if (fd == -1)
  42     {
  43       puts ("cannot open /dev/null");
  44       exit (1);
  45     }
  46   FILE *fp = fdopen (fd, "w");
  47   if (fp == NULL)
  48     {
  49       puts ("fdopen failed");
  50       exit (1);
  51     }
  52
  53   pthread_cleanup_push (cleanup, NULL);
  54
  55   int e = pthread_barrier_wait (&b);
  56   if (e != 0 && e != PTHREAD_BARRIER_SERIAL_THREAD)
  57     {
  58       puts ("barrier_wait failed");
  59       exit (1);
  60     }
  61
  62   while (1)
  63     /* fprintf() uses write() which is a cancallation point.  */
  64     fprintf (fp, "foo");
  65
  66   pthread_cleanup_pop (0);
  67
  68   return NULL;
  69 }
  70
  71
  72 static int
  73 do_test (void)
  74 {
  75   if (pthread_barrier_init (&b, NULL, 2) != 0)
  76     {
  77       puts ("barrier_init failed");
  78       exit (1);
  79     }
  80
  81   pthread_t th;
  82   if (pthread_create (&th, NULL, tf, NULL) != 0)
  83     {
  84       puts ("create failed");
  85       return 1;
  86     }
  87
  88   int e = pthread_barrier_wait (&b);
  89   if (e != 0 && e != PTHREAD_BARRIER_SERIAL_THREAD)
  90     {
  91       puts ("barrier_wait failed");
  92       exit (1);
  93     }
  94
  95   sleep (1);
  96
  97   puts ("cancel now");
  98
  99   if (pthread_cancel (th) != 0)
 100     {
 101       puts ("cancel failed");
 102       exit (1);
 103     }
 104
 105   puts ("waiting for the child");
 106
 107   void *r;
 108   if (pthread_join (th, &r) != 0)
 109     {
 110       puts ("join failed");
 111       exit (1);
 112     }
 113
 114   if (r != PTHREAD_CANCELED)
 115     {
 116       puts ("thread wasn't canceled");
 117       exit (1);
 118     }
 119
 120   return 0;
 121 }
 122
 123
 124 #define TEST_FUNCTION do_test ()
 125 #include "../test-skeleton.c"