nptl/tst-cancel26.c

   1 /* Check for failure paths handling for cancellation points.
   2    Copyright (C) 2015-2018 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   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    <http://www.gnu.org/licenses/>.  */
  18
  19 #include <errno.h>
  20 #include <pthread.h>
  21 #include <stdio.h>
  22 #include <stdlib.h>
  23 #include <string.h>
  24 #include <unistd.h>
  25
  26 /* Check that the cancel syscall points handles both the errno and return code
  27    correctly for invalid arguments.  */
  28 static void *
  29 tf (void *arg)
  30 {
  31 #ifdef SET_CANCEL_DISABLE
  32   pthread_setcancelstate (PTHREAD_CANCEL_DISABLE, NULL);
  33 #endif
  34
  35   /* This is a cancellation point, but we should not be cancelled.  */
  36   int r = write (-1, 0, 0);
  37
  38   if (r != -1 || errno != EBADF)
  39     {
  40       printf ("error: write returned %d, errno %d\n", r, errno);
  41       exit (1);
  42     }
  43
  44   return NULL;
  45 }
  46
  47 static int
  48 do_test (void)
  49 {
  50   pthread_t th;
  51
  52   if (pthread_create (&th, NULL, tf, NULL) != 0)
  53     {
  54       puts ("error: pthread_create failed");
  55       exit (1);
  56     }
  57
  58   if (pthread_join (th, NULL) != 0)
  59     {
  60       puts ("error: pthread_join failed");
  61       exit (1);
  62     }
  63
  64   return 0;
  65 }
  66
  67 #define TEST_FUNCTION do_test ()
  68 #include "../test-skeleton.c"