sysdeps/pthread/tst-cancel1.c

   1 /* Copyright (C) 2002-2020 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3    Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
   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 <pthread.h>
  20 #include <signal.h>
  21 #include <stdio.h>
  22 #include <stdlib.h>
  23 #include <string.h>
  24
  25
  26 static pthread_mutex_t m1 = PTHREAD_MUTEX_INITIALIZER;
  27 static pthread_mutex_t m2 = PTHREAD_MUTEX_INITIALIZER;
  28
  29 static int cntr;
  30
  31
  32 static void
  33 cleanup (void *arg)
  34 {
  35   if (arg != (void *) 42l)
  36     cntr = 42;
  37   else
  38     cntr = 1;
  39 }
  40
  41
  42 static void *
  43 tf (void *arg)
  44 {
  45   /* Ignore all signals.  This must not have any effect on delivering
  46      the cancellation signal.  */
  47   sigset_t ss;
  48
  49   sigfillset (&ss);
  50
  51   if (pthread_sigmask (SIG_BLOCK, &ss, NULL) != 0)
  52     {
  53       puts ("pthread_sigmask failed");
  54       exit (1);
  55     }
  56
  57   pthread_cleanup_push (cleanup, (void *) 42l);
  58
  59   int err = pthread_setcanceltype (PTHREAD_CANCEL_ASYNCHRONOUS, NULL);
  60   if (err != 0)
  61     {
  62       printf ("setcanceltype failed: %s\n", strerror (err));
  63       exit (1);
  64     }
  65   /* The following code is not standard compliant: the mutex functions
  66      must not be called with asynchronous cancellation enabled.  */
  67
  68   err = pthread_mutex_unlock (&m2);
  69   if (err != 0)
  70     {
  71       printf ("child: mutex_unlock failed: %s\n", strerror (err));
  72       exit (1);
  73     }
  74
  75   err = pthread_mutex_lock (&m1);
  76   if (err != 0)
  77     {
  78       printf ("child: 1st mutex_lock failed: %s\n", strerror (err));
  79       exit (1);
  80     }
  81
  82   /* We should never come here.  */
  83
  84   pthread_cleanup_pop (0);
  85
  86   return NULL;
  87 }
  88
  89
  90 static int
  91 do_test (void)
  92 {
  93   int err;
  94   pthread_t th;
  95   int result = 0;
  96   void *retval;
  97
  98   /* Get the mutexes.  */
  99   err = pthread_mutex_lock (&m1);
 100   if (err != 0)
 101     {
 102       printf ("parent: 1st mutex_lock failed: %s\n", strerror (err));
 103       return 1;
 104     }
 105   err = pthread_mutex_lock (&m2);
 106   if (err != 0)
 107     {
 108       printf ("parent: 2nd mutex_lock failed: %s\n", strerror (err));
 109       return 1;
 110     }
 111
 112   err = pthread_create (&th, NULL, tf, NULL);
 113   if (err != 0)
 114     {
 115       printf ("create failed: %s\n", strerror (err));
 116       return 1;
 117     }
 118
 119   err = pthread_mutex_lock (&m2);
 120   if (err != 0)
 121     {
 122       printf ("parent: 3rd mutex_lock failed: %s\n", strerror (err));
 123       return 1;
 124     }
 125
 126   err = pthread_cancel (th);
 127   if (err != 0)
 128     {
 129       printf ("cancel failed: %s\n", strerror (err));
 130       return 1;
 131     }
 132
 133   err = pthread_join (th, &retval);
 134   if (err != 0)
 135     {
 136       printf ("join failed: %s\n", strerror (err));
 137       return 1;
 138     }
 139
 140   if (retval != PTHREAD_CANCELED)
 141     {
 142       printf ("wrong return value: %p\n", retval);
 143       result = 1;
 144     }
 145
 146   if (cntr == 42)
 147     {
 148       puts ("cleanup handler called with wrong argument");
 149       result = 1;
 150     }
 151   else if (cntr != 1)
 152     {
 153       puts ("cleanup handling not called");
 154       result = 1;
 155     }
 156
 157   return result;
 158 }
 159
 160
 161 #define TEST_FUNCTION do_test ()
 162 #include "../test-skeleton.c"