sysdeps/pthread/tst-cancel9.c

   1 /* Copyright (C) 2003-2022 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3
   4    The GNU C Library is free software; you can redistribute it and/or
   5    modify it under the terms of the GNU Lesser General Public
   6    License as published by the Free Software Foundation; either
   7    version 2.1 of the License, or (at your option) any later version.
   8
   9    The GNU C Library is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12    Lesser General Public License for more details.
  13
  14    You should have received a copy of the GNU Lesser General Public
  15    License along with the GNU C Library; if not, see
  16    <https://www.gnu.org/licenses/>.  */
  17
  18 #include <fcntl.h>
  19 #include <pthread.h>
  20 #include <stdio.h>
  21 #include <stdlib.h>
  22 #include <string.h>
  23 #include <unistd.h>
  24
  25
  26 static pthread_barrier_t b;
  27
  28
  29 static void
  30 cleanup (void *arg)
  31 {
  32   fputs ("in cleanup\n", stdout);
  33 }
  34
  35
  36 static void *
  37 tf (void *arg)
  38 {
  39   int fd = open ("/dev/null", O_RDWR);
  40   if (fd == -1)
  41     {
  42       puts ("cannot open /dev/null");
  43       exit (1);
  44     }
  45   FILE *fp = fdopen (fd, "w");
  46   if (fp == NULL)
  47     {
  48       puts ("fdopen failed");
  49       exit (1);
  50     }
  51
  52   pthread_cleanup_push (cleanup, NULL);
  53
  54   int e = pthread_barrier_wait (&b);
  55   if (e != 0 && e != PTHREAD_BARRIER_SERIAL_THREAD)
  56     {
  57       puts ("barrier_wait failed");
  58       exit (1);
  59     }
  60
  61   while (1)
  62     /* fprintf() uses write() which is a cancallation point.  */
  63     fprintf (fp, "foo");
  64
  65   pthread_cleanup_pop (0);
  66
  67   return NULL;
  68 }
  69
  70
  71 static int
  72 do_test (void)
  73 {
  74   if (pthread_barrier_init (&b, NULL, 2) != 0)
  75     {
  76       puts ("barrier_init failed");
  77       exit (1);
  78     }
  79
  80   pthread_t th;
  81   if (pthread_create (&th, NULL, tf, NULL) != 0)
  82     {
  83       puts ("create failed");
  84       return 1;
  85     }
  86
  87   int e = pthread_barrier_wait (&b);
  88   if (e != 0 && e != PTHREAD_BARRIER_SERIAL_THREAD)
  89     {
  90       puts ("barrier_wait failed");
  91       exit (1);
  92     }
  93
  94   sleep (1);
  95
  96   puts ("cancel now");
  97
  98   if (pthread_cancel (th) != 0)
  99     {
 100       puts ("cancel failed");
 101       exit (1);
 102     }
 103
 104   puts ("waiting for the child");
 105
 106   void *r;
 107   if (pthread_join (th, &r) != 0)
 108     {
 109       puts ("join failed");
 110       exit (1);
 111     }
 112
 113   if (r != PTHREAD_CANCELED)
 114     {
 115       puts ("thread wasn't canceled");
 116       exit (1);
 117     }
 118
 119   return 0;
 120 }
 121
 122
 123 #define TEST_FUNCTION do_test ()
 124 #include "../test-skeleton.c"