nptl/tst-cancel16.c

   1 /* Copyright (C) 2003-2018 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    <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 #include <sys/mman.h>
  26 #include <sys/wait.h>
  27
  28
  29 static pthread_barrier_t b2;
  30 static int fd;
  31 static int called;
  32
  33
  34 static void
  35 cl (void *arg)
  36 {
  37   called = 1;
  38 }
  39
  40
  41 static void *
  42 tf (void *arg)
  43 {
  44   int r = pthread_barrier_wait (&b2);
  45   if (r != 0 && r != PTHREAD_BARRIER_SERIAL_THREAD)
  46     {
  47       puts ("child thread: barrier_wait failed");
  48       exit (1);
  49     }
  50
  51   pthread_cleanup_push (cl, NULL);
  52
  53   /* This call should never return.  */
  54   (void) lockf (fd, F_LOCK, 0);
  55
  56   pthread_cleanup_pop (0);
  57
  58   return NULL;
  59 }
  60
  61
  62 static int
  63 do_test (void)
  64 {
  65   char fname[] = "/tmp/cancel16XXXXXX";
  66   fd = mkstemp (fname);
  67   if (fd == -1)
  68     {
  69       puts ("mkstemp failed");
  70       return 1;
  71     }
  72   unlink (fname);
  73
  74   char mem[sizeof (pthread_barrier_t)];
  75   memset (mem, '\0', sizeof (mem));
  76   if (TEMP_FAILURE_RETRY (pwrite (fd, mem, sizeof (mem), 0)) != sizeof (mem))
  77     {
  78       puts ("pwrite failed");
  79       return 1;
  80     }
  81
  82   void *p = mmap (NULL, sizeof (mem), PROT_READ|PROT_WRITE, MAP_SHARED, fd, 0);
  83   if (p == MAP_FAILED)
  84     {
  85       puts ("mmap failed");
  86       return 1;
  87     }
  88   pthread_barrier_t *b = (pthread_barrier_t *) p;
  89
  90   pthread_barrierattr_t ba;
  91   if (pthread_barrierattr_init (&ba) != 0)
  92     {
  93       puts ("barrierattr_init failed");
  94       return 1;
  95     }
  96   if (pthread_barrierattr_setpshared (&ba, 1) != 0)
  97     {
  98       puts ("barrierattr_setshared failed");
  99       return 1;
 100     }
 101
 102   if (pthread_barrier_init (b, &ba, 2) != 0)
 103     {
 104       puts ("1st barrier_init failed");
 105       return 1;
 106     }
 107   if (pthread_barrierattr_destroy (&ba) != 0)
 108     {
 109       puts ("barrier_destroy failed");
 110       return 1;
 111     }
 112
 113   pid_t pid = fork ();
 114   if (pid == 0)
 115     {
 116       /* Child.  Lock the file and wait.  */
 117       if (lockf (fd, F_LOCK, 0) != 0)
 118         {
 119           puts ("child process: lockf failed");
 120           _exit (1);
 121         }
 122
 123       int r = pthread_barrier_wait (b);
 124       if (r != 0 && r != PTHREAD_BARRIER_SERIAL_THREAD)
 125         {
 126           puts ("child process: 1st barrier_wait failed");
 127           _exit (1);
 128         }
 129
 130       /* Make sure the process dies.  */
 131       alarm (5);
 132
 133       r = pthread_barrier_wait (b);
 134       if (r != 0 && r != PTHREAD_BARRIER_SERIAL_THREAD)
 135         {
 136           puts ("child process: 2nd barrier_wait failed");
 137           _exit (1);
 138         }
 139
 140       _exit (0);
 141     }
 142   if (pid == -1)
 143     {
 144       puts ("fork failed");
 145       return 1;
 146     }
 147
 148   int r = pthread_barrier_wait (b);
 149   if (r != 0 && r != PTHREAD_BARRIER_SERIAL_THREAD)
 150     {
 151       puts ("main: 1st barrier_wait failed");
 152       _exit (1);
 153     }
 154
 155   if (pthread_barrier_init (&b2, NULL, 2) != 0)
 156     {
 157       puts ("2nd barrier_init failed");
 158       return 1;
 159     }
 160
 161   pthread_t th;
 162   if (pthread_create (&th, NULL, tf, NULL) != 0)
 163     {
 164       puts ("create failed");
 165       return 1;
 166     }
 167
 168   r = pthread_barrier_wait (&b2);
 169   if (r != 0 && r != PTHREAD_BARRIER_SERIAL_THREAD)
 170     {
 171       puts ("main: 2nd barrier_wait failed");
 172       return 1;
 173     }
 174
 175   /* Delay.  */
 176   sleep (1);
 177
 178   if (pthread_cancel (th) != 0)
 179     {
 180       puts ("cancel failed");
 181       return 1;
 182     }
 183
 184   void *result;
 185   if (pthread_join (th, &result) != 0)
 186     {
 187       puts ("join failed");
 188       return 1;
 189     }
 190   if (result != PTHREAD_CANCELED)
 191     {
 192       puts ("thread not canceled");
 193       return 1;
 194     }
 195   if (called == 0)
 196     {
 197       puts ("cleanup handler not called");
 198       return 1;
 199     }
 200
 201   r = pthread_barrier_wait (b);
 202   if (r != 0 && r != PTHREAD_BARRIER_SERIAL_THREAD)
 203     {
 204       puts ("main: 3rd barrier_wait failed");
 205       return 1;
 206     }
 207
 208   int status;
 209   if (TEMP_FAILURE_RETRY (waitpid (pid, &status, 0)) != pid)
 210     {
 211       puts ("waitpid failed");
 212       return 1;
 213     }
 214   if (WEXITSTATUS (status) != 0)
 215     {
 216       printf ("child process exits with %d\n", WEXITSTATUS (status));
 217       return 1;
 218     }
 219
 220   if (lockf (fd, F_LOCK, 0) != 0)
 221     {
 222       puts ("main: lockf failed");
 223       return 1;
 224     }
 225
 226   return 0;
 227 }
 228
 229 #define TEST_FUNCTION do_test ()
 230 #include "../test-skeleton.c"