nptl/tst-signal2.c

   1 /* Copyright (C) 2002, 2003 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, write to the Free
  17    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  18    02111-1307 USA.  */
  19
  20 #include <errno.h>
  21 #include <pthread.h>
  22 #include <signal.h>
  23 #include <stdio.h>
  24 #include <stdlib.h>
  25 #include <unistd.h>
  26 #include <sys/mman.h>
  27 #include <sys/wait.h>
  28 #include <string.h>
  29
  30
  31 static sigset_t ss;
  32 static pthread_barrier_t *b;
  33
  34
  35 static void *
  36 tf (void *arg)
  37 {
  38   pthread_barrier_wait (b);
  39
  40   puts ("child: calling sigwait now");
  41
  42   int sig;
  43   int err;
  44   err = sigwait (&ss, &sig);
  45   if (err != 0)
  46     {
  47       printf ("sigwait returned unsuccessfully: %s (%d)\n",
  48               strerror (err), err);
  49       _exit (1);
  50     }
  51
  52   puts ("sigwait returned");
  53
  54   if (sig != SIGINT)
  55     {
  56       printf ("caught signal %d, expected %d (SIGINT)\n", sig, SIGINT);
  57       _exit (1);
  58     }
  59
  60   puts ("child thread terminating now");
  61
  62   return NULL;
  63 }
  64
  65
  66 static void
  67 receiver (void)
  68 {
  69   pthread_t th;
  70
  71   /* Make sure the process doesn't run forever.  */
  72   alarm (10);
  73
  74   sigfillset (&ss);
  75
  76   if (pthread_sigmask (SIG_SETMASK, &ss, NULL) != 0)
  77     {
  78       puts ("1st pthread_sigmask failed");
  79       _exit (1);
  80     }
  81
  82   if (pthread_create (&th, NULL, tf, NULL) != 0)
  83     {
  84       puts ("pthread_create failed");
  85       _exit (1);
  86     }
  87
  88   if (pthread_join (th, NULL) != 0)
  89     {
  90       puts ("thread didn't join");
  91       _exit (1);
  92     }
  93
  94   puts ("join succeeded");
  95
  96   _exit (0);
  97 }
  98
  99
 100 static int
 101 do_test (void)
 102 {
 103   char tmp[] = "/tmp/tst-signal1-XXXXXX";
 104
 105   int fd = mkstemp (tmp);
 106   if (fd == -1)
 107     {
 108       puts ("mkstemp failed");
 109       exit (1);
 110     }
 111
 112   unlink (tmp);
 113
 114   int i;
 115   for (i = 0; i < 20; ++i)
 116     write (fd, "foobar xyzzy", 12);
 117
 118   b = mmap (NULL, sizeof (pthread_barrier_t), PROT_READ | PROT_WRITE,
 119             MAP_SHARED, fd, 0);
 120   if (b == MAP_FAILED)
 121     {
 122       puts ("mmap failed");
 123       exit (1);
 124     }
 125
 126   pthread_barrierattr_t ba;
 127   if (pthread_barrierattr_init (&ba) != 0)
 128     {
 129       puts ("barrierattr_init failed");
 130       exit (1);
 131     }
 132
 133   if (pthread_barrierattr_setpshared (&ba, PTHREAD_PROCESS_SHARED) != 0)
 134     {
 135       puts ("barrierattr_setpshared failed");
 136       exit (1);
 137     }
 138
 139   if (pthread_barrier_init (b, &ba, 2) != 0)
 140     {
 141       puts ("barrier_init failed");
 142       exit (1);
 143     }
 144
 145   if (pthread_barrierattr_destroy (&ba) != 0)
 146     {
 147       puts ("barrierattr_destroy failed");
 148       exit (1);
 149     }
 150
 151   pid_t pid = fork ();
 152   if (pid == -1)
 153     {
 154       puts ("fork failed");
 155       exit (1);
 156     }
 157
 158   if (pid == 0)
 159     receiver ();
 160
 161   pthread_barrier_wait (b);
 162
 163   /* Wait a bit more.  */
 164   struct timespec ts = { .tv_sec = 0, .tv_nsec = 10000000 };
 165   nanosleep (&ts, NULL);
 166
 167   /* Send the signal.  */
 168   puts ("sending the signal now");
 169   kill (pid, SIGINT);
 170
 171   /* Wait for the process to terminate.  */
 172   int status;
 173   if (TEMP_FAILURE_RETRY (waitpid (pid, &status, 0)) != pid)
 174     {
 175       puts ("wrong child reported terminated");
 176       exit (1);
 177     }
 178
 179   if (!WIFEXITED (status))
 180     {
 181       if (WIFSIGNALED (status))
 182         printf ("child exited with signal %d\n", WTERMSIG (status));
 183       else
 184         puts ("child didn't exit normally");
 185       exit (1);
 186     }
 187
 188   if (WEXITSTATUS (status) != 0)
 189     {
 190       printf ("exit status %d != 0\n", WEXITSTATUS (status));
 191       exit (1);
 192     }
 193
 194   return 0;
 195 }
 196
 197 #define TEST_FUNCTION do_test ()
 198 #include "../test-skeleton.c"