sysdeps/pthread/tst-cancel16.c

   1 /* Copyright (C) 2003-2023 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 <errno.h>
  19 #include <pthread.h>
  20 #include <stdio.h>
  21 #include <stdlib.h>
  22 #include <string.h>
  23 #include <unistd.h>
  24 #include <sys/mman.h>
  25 #include <sys/wait.h>
  26
  27
  28 static pthread_barrier_t b2;
  29 static int fd;
  30 static int called;
  31
  32
  33 static void
  34 cl (void *arg)
  35 {
  36   called = 1;
  37 }
  38
  39
  40 static void *
  41 tf (void *arg)
  42 {
  43   int r = pthread_barrier_wait (&b2);
  44   if (r != 0 && r != PTHREAD_BARRIER_SERIAL_THREAD)
  45     {
  46       puts ("child thread: barrier_wait failed");
  47       exit (1);
  48     }
  49
  50   pthread_cleanup_push (cl, NULL);
  51
  52   /* This call should never return.  */
  53   if (lockf (fd, F_LOCK, 0))
  54     {
  55       puts ("child thread: lockf failed");
  56       exit (1);
  57     }
  58
  59   pthread_cleanup_pop (0);
  60
  61   return NULL;
  62 }
  63
  64
  65 static int
  66 do_test (void)
  67 {
  68   char fname[] = "/tmp/cancel16XXXXXX";
  69   fd = mkstemp (fname);
  70   if (fd == -1)
  71     {
  72       puts ("mkstemp failed");
  73       return 1;
  74     }
  75   unlink (fname);
  76
  77   char mem[sizeof (pthread_barrier_t)];
  78   memset (mem, '\0', sizeof (mem));
  79   if (TEMP_FAILURE_RETRY (pwrite (fd, mem, sizeof (mem), 0)) != sizeof (mem))
  80     {
  81       puts ("pwrite failed");
  82       return 1;
  83     }
  84
  85   void *p = mmap (NULL, sizeof (mem), PROT_READ|PROT_WRITE, MAP_SHARED, fd, 0);
  86   if (p == MAP_FAILED)
  87     {
  88       puts ("mmap failed");
  89       return 1;
  90     }
  91   pthread_barrier_t *b = (pthread_barrier_t *) p;
  92
  93   pthread_barrierattr_t ba;
  94   if (pthread_barrierattr_init (&ba) != 0)
  95     {
  96       puts ("barrierattr_init failed");
  97       return 1;
  98     }
  99   if (pthread_barrierattr_setpshared (&ba, 1) != 0)
 100     {
 101       puts ("barrierattr_setshared failed");
 102       return 1;
 103     }
 104
 105   if (pthread_barrier_init (b, &ba, 2) != 0)
 106     {
 107       puts ("1st barrier_init failed");
 108       return 1;
 109     }
 110   if (pthread_barrierattr_destroy (&ba) != 0)
 111     {
 112       puts ("barrier_destroy failed");
 113       return 1;
 114     }
 115
 116   pid_t pid = fork ();
 117   if (pid == 0)
 118     {
 119       /* Child.  Lock the file and wait.  */
 120       if (lockf (fd, F_LOCK, 0) != 0)
 121         {
 122           puts ("child process: lockf failed");
 123           _exit (1);
 124         }
 125
 126       int r = pthread_barrier_wait (b);
 127       if (r != 0 && r != PTHREAD_BARRIER_SERIAL_THREAD)
 128         {
 129           puts ("child process: 1st barrier_wait failed");
 130           _exit (1);
 131         }
 132
 133       /* Make sure the process dies.  */
 134       alarm (5);
 135
 136       r = pthread_barrier_wait (b);
 137       if (r != 0 && r != PTHREAD_BARRIER_SERIAL_THREAD)
 138         {
 139           puts ("child process: 2nd barrier_wait failed");
 140           _exit (1);
 141         }
 142
 143       _exit (0);
 144     }
 145   if (pid == -1)
 146     {
 147       puts ("fork failed");
 148       return 1;
 149     }
 150
 151   int r = pthread_barrier_wait (b);
 152   if (r != 0 && r != PTHREAD_BARRIER_SERIAL_THREAD)
 153     {
 154       puts ("main: 1st barrier_wait failed");
 155       _exit (1);
 156     }
 157
 158   if (pthread_barrier_init (&b2, NULL, 2) != 0)
 159     {
 160       puts ("2nd barrier_init failed");
 161       return 1;
 162     }
 163
 164   pthread_t th;
 165   if (pthread_create (&th, NULL, tf, NULL) != 0)
 166     {
 167       puts ("create failed");
 168       return 1;
 169     }
 170
 171   r = pthread_barrier_wait (&b2);
 172   if (r != 0 && r != PTHREAD_BARRIER_SERIAL_THREAD)
 173     {
 174       puts ("main: 2nd barrier_wait failed");
 175       return 1;
 176     }
 177
 178   /* Delay.  */
 179   sleep (1);
 180
 181   if (pthread_cancel (th) != 0)
 182     {
 183       puts ("cancel failed");
 184       return 1;
 185     }
 186
 187   void *result;
 188   if (pthread_join (th, &result) != 0)
 189     {
 190       puts ("join failed");
 191       return 1;
 192     }
 193   if (result != PTHREAD_CANCELED)
 194     {
 195       puts ("thread not canceled");
 196       return 1;
 197     }
 198   if (called == 0)
 199     {
 200       puts ("cleanup handler not called");
 201       return 1;
 202     }
 203
 204   r = pthread_barrier_wait (b);
 205   if (r != 0 && r != PTHREAD_BARRIER_SERIAL_THREAD)
 206     {
 207       puts ("main: 3rd barrier_wait failed");
 208       return 1;
 209     }
 210
 211   int status;
 212   if (TEMP_FAILURE_RETRY (waitpid (pid, &status, 0)) != pid)
 213     {
 214       puts ("waitpid failed");
 215       return 1;
 216     }
 217   if (WEXITSTATUS (status) != 0)
 218     {
 219       printf ("child process exits with %d\n", WEXITSTATUS (status));
 220       return 1;
 221     }
 222
 223   if (lockf (fd, F_LOCK, 0) != 0)
 224     {
 225       puts ("main: lockf failed");
 226       return 1;
 227     }
 228
 229   return 0;
 230 }
 231
 232 #define TEST_FUNCTION do_test ()
 233 #include "../test-skeleton.c"