sysdeps/pthread/tst-cancel30.c

   1 /* Check if printf like functions does not disable asynchronous cancellation
   2    mode (BZ#29214).
   3
   4    Copyright (C) 2022-2023 Free Software Foundation, Inc.
   5    This file is part of the GNU C Library.
   6
   7    The GNU C Library is free software; you can redistribute it and/or
   8    modify it under the terms of the GNU Lesser General Public
   9    License as published by the Free Software Foundation; either
  10    version 2.1 of the License, or (at your option) any later version.
  11
  12    The GNU C Library is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15    Lesser General Public License for more details.
  16
  17    You should have received a copy of the GNU Lesser General Public
  18    License along with the GNU C Library; if not, see
  19    <https://www.gnu.org/licenses/>.  */
  20
  21 #include <support/check.h>
  22 #include <support/xstdio.h>
  23 #include <support/xthread.h>
  24 #include <sys/syscall.h>
  25 #include <unistd.h>
  26
  27 static pthread_barrier_t b;
  28
  29 static void *
  30 tf (void *arg)
  31 {
  32   int old;
  33
  34   TEST_COMPARE (pthread_setcanceltype (PTHREAD_CANCEL_ASYNCHRONOUS, NULL), 0);
  35
  36   TEST_COMPARE (pthread_setcanceltype (PTHREAD_CANCEL_ASYNCHRONOUS, &old), 0);
  37   TEST_COMPARE (old, PTHREAD_CANCEL_ASYNCHRONOUS);
  38
  39   /* Check if internal lock cleanup routines restore the cancellation type
  40      correctly.  */
  41   printf ("...\n");
  42   TEST_COMPARE (pthread_setcanceltype (PTHREAD_CANCEL_ASYNCHRONOUS, &old), 0);
  43   TEST_COMPARE (old, PTHREAD_CANCEL_ASYNCHRONOUS);
  44
  45   xpthread_barrier_wait (&b);
  46
  47   /* Wait indefinitely for cancellation, which only works if asynchronous
  48      cancellation is enabled.  */
  49 #ifdef SYS_pause
  50   syscall (SYS_pause);
  51 #elif defined SYS_ppoll || defined SYS_ppoll_time64
  52 # ifndef SYS_ppoll_time64
  53 #  define SYS_ppoll_time64 SYS_ppoll
  54 # endif
  55   syscall (SYS_ppoll_time64, NULL, 0, NULL, NULL);
  56 #else
  57   for (;;);
  58 #endif
  59
  60   return 0;
  61 }
  62
  63 static int
  64 do_test (void)
  65 {
  66   xpthread_barrier_init (&b, NULL, 2);
  67
  68   pthread_t th = xpthread_create (NULL, tf, NULL);
  69
  70   xpthread_barrier_wait (&b);
  71
  72   xpthread_cancel (th);
  73
  74   void *status = xpthread_join (th);
  75   TEST_VERIFY (status == PTHREAD_CANCELED);
  76
  77   return 0;
  78 }
  79
  80 /* There is no need to wait full TIMEOUT if asynchronous is not working.  */
  81 #define TIMEOUT 3
  82 #include <support/test-driver.c>