nptl/tst-signal2.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 <errno.h>
  20 #include <pthread.h>
  21 #include <signal.h>
  22 #include <stdio.h>
  23 #include <stdlib.h>
  24 #include <unistd.h>
  25 #include <sys/mman.h>
  26 #include <sys/wait.h>
  27 #include <string.h>
  28
  29
  30 static sigset_t ss;
  31 static pthread_barrier_t *b;
  32
  33
  34 static void *
  35 tf (void *arg)
  36 {
  37   pthread_barrier_wait (b);
  38
  39   puts ("child: calling sigwait now");
  40
  41   int sig;
  42   int err;
  43   err = sigwait (&ss, &sig);
  44   if (err != 0)
  45     {
  46       printf ("sigwait returned unsuccessfully: %s (%d)\n",
  47               strerror (err), err);
  48       _exit (1);
  49     }
  50
  51   puts ("sigwait returned");
  52
  53   if (sig != SIGINT)
  54     {
  55       printf ("caught signal %d, expected %d (SIGINT)\n", sig, SIGINT);
  56       _exit (1);
  57     }
  58
  59   puts ("child thread terminating now");
  60
  61   return NULL;
  62 }
  63
  64
  65 static void
  66 receiver (void)
  67 {
  68   pthread_t th;
  69
  70   /* Make sure the process doesn't run forever.  */
  71   alarm (10);
  72
  73   sigfillset (&ss);
  74
  75   if (pthread_sigmask (SIG_SETMASK, &ss, NULL) != 0)
  76     {
  77       puts ("1st pthread_sigmask failed");
  78       _exit (1);
  79     }
  80
  81   if (pthread_create (&th, NULL, tf, NULL) != 0)
  82     {
  83       puts ("pthread_create failed");
  84       _exit (1);
  85     }
  86
  87   if (pthread_join (th, NULL) != 0)
  88     {
  89       puts ("thread didn't join");
  90       _exit (1);
  91     }
  92
  93   puts ("join succeeded");
  94
  95   _exit (0);
  96 }
  97
  98
  99 static int
 100 do_test (void)
 101 {
 102   char tmp[] = "/tmp/tst-signal1-XXXXXX";
 103
 104   int fd = mkstemp (tmp);
 105   if (fd == -1)
 106     {
 107       puts ("mkstemp failed");
 108       exit (1);
 109     }
 110
 111   unlink (tmp);
 112
 113   int i;
 114   for (i = 0; i < 20; ++i)
 115     write (fd, "foobar xyzzy", 12);
 116
 117   b = mmap (NULL, sizeof (pthread_barrier_t), PROT_READ | PROT_WRITE,
 118             MAP_SHARED, fd, 0);
 119   if (b == MAP_FAILED)
 120     {
 121       puts ("mmap failed");
 122       exit (1);
 123     }
 124
 125   pthread_barrierattr_t ba;
 126   if (pthread_barrierattr_init (&ba) != 0)
 127     {
 128       puts ("barrierattr_init failed");
 129       exit (1);
 130     }
 131
 132   if (pthread_barrierattr_setpshared (&ba, PTHREAD_PROCESS_SHARED) != 0)
 133     {
 134       puts ("barrierattr_setpshared failed");
 135       exit (1);
 136     }
 137
 138   if (pthread_barrier_init (b, &ba, 2) != 0)
 139     {
 140       puts ("barrier_init failed");
 141       exit (1);
 142     }
 143
 144   if (pthread_barrierattr_destroy (&ba) != 0)
 145     {
 146       puts ("barrierattr_destroy failed");
 147       exit (1);
 148     }
 149
 150   pid_t pid = fork ();
 151   if (pid == -1)
 152     {
 153       puts ("fork failed");
 154       exit (1);
 155     }
 156
 157   if (pid == 0)
 158     receiver ();
 159
 160   pthread_barrier_wait (b);
 161
 162   /* Wait a bit more.  */
 163   struct timespec ts = { .tv_sec = 0, .tv_nsec = 10000000 };
 164   nanosleep (&ts, NULL);
 165
 166   /* Send the signal.  */
 167   puts ("sending the signal now");
 168   kill (pid, SIGINT);
 169
 170   /* Wait for the process to terminate.  */
 171   int status;
 172   if (TEMP_FAILURE_RETRY (waitpid (pid, &status, 0)) != pid)
 173     {
 174       puts ("wrong child reported terminated");
 175       exit (1);
 176     }
 177
 178   if (!WIFEXITED (status))
 179     {
 180       if (WIFSIGNALED (status))
 181         printf ("child exited with signal %d\n", WTERMSIG (status));
 182       else
 183         puts ("child didn't exit normally");
 184       exit (1);
 185     }
 186
 187   if (WEXITSTATUS (status) != 0)
 188     {
 189       printf ("exit status %d != 0\n", WEXITSTATUS (status));
 190       exit (1);
 191     }
 192
 193   return 0;
 194 }
 195
 196 #define TEST_FUNCTION do_test ()
 197 #include "../test-skeleton.c"