sysdeps/pthread/tst-signal2.c

   1 /* Copyright (C) 2002-2023 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 <signal.h>
  21 #include <stdio.h>
  22 #include <stdlib.h>
  23 #include <unistd.h>
  24 #include <sys/mman.h>
  25 #include <sys/wait.h>
  26 #include <string.h>
  27
  28
  29 static sigset_t ss;
  30 static pthread_barrier_t *b;
  31
  32
  33 static void *
  34 tf (void *arg)
  35 {
  36   pthread_barrier_wait (b);
  37
  38   puts ("child: calling sigwait now");
  39
  40   int sig;
  41   int err;
  42   err = sigwait (&ss, &sig);
  43   if (err != 0)
  44     {
  45       printf ("sigwait returned unsuccessfully: %s (%d)\n",
  46               strerror (err), err);
  47       _exit (1);
  48     }
  49
  50   puts ("sigwait returned");
  51
  52   if (sig != SIGINT)
  53     {
  54       printf ("caught signal %d, expected %d (SIGINT)\n", sig, SIGINT);
  55       _exit (1);
  56     }
  57
  58   puts ("child thread terminating now");
  59
  60   return NULL;
  61 }
  62
  63
  64 static void
  65 receiver (void)
  66 {
  67   pthread_t th;
  68
  69   /* Make sure the process doesn't run forever.  */
  70   alarm (10);
  71
  72   sigfillset (&ss);
  73
  74   if (pthread_sigmask (SIG_SETMASK, &ss, NULL) != 0)
  75     {
  76       puts ("1st pthread_sigmask failed");
  77       _exit (1);
  78     }
  79
  80   if (pthread_create (&th, NULL, tf, NULL) != 0)
  81     {
  82       puts ("pthread_create failed");
  83       _exit (1);
  84     }
  85
  86   if (pthread_join (th, NULL) != 0)
  87     {
  88       puts ("thread didn't join");
  89       _exit (1);
  90     }
  91
  92   puts ("join succeeded");
  93
  94   _exit (0);
  95 }
  96
  97
  98 static int
  99 do_test (void)
 100 {
 101   char tmp[] = "/tmp/tst-signal1-XXXXXX";
 102
 103   int fd = mkstemp (tmp);
 104   if (fd == -1)
 105     {
 106       puts ("mkstemp failed");
 107       exit (1);
 108     }
 109
 110   unlink (tmp);
 111
 112   int i;
 113   for (i = 0; i < 20; ++i)
 114     write (fd, "foobar xyzzy", 12);
 115
 116   b = mmap (NULL, sizeof (pthread_barrier_t), PROT_READ | PROT_WRITE,
 117             MAP_SHARED, fd, 0);
 118   if (b == MAP_FAILED)
 119     {
 120       puts ("mmap failed");
 121       exit (1);
 122     }
 123
 124   pthread_barrierattr_t ba;
 125   if (pthread_barrierattr_init (&ba) != 0)
 126     {
 127       puts ("barrierattr_init failed");
 128       exit (1);
 129     }
 130
 131   if (pthread_barrierattr_setpshared (&ba, PTHREAD_PROCESS_SHARED) != 0)
 132     {
 133       puts ("barrierattr_setpshared failed");
 134       exit (1);
 135     }
 136
 137   if (pthread_barrier_init (b, &ba, 2) != 0)
 138     {
 139       puts ("barrier_init failed");
 140       exit (1);
 141     }
 142
 143   if (pthread_barrierattr_destroy (&ba) != 0)
 144     {
 145       puts ("barrierattr_destroy failed");
 146       exit (1);
 147     }
 148
 149   pid_t pid = fork ();
 150   if (pid == -1)
 151     {
 152       puts ("fork failed");
 153       exit (1);
 154     }
 155
 156   if (pid == 0)
 157     receiver ();
 158
 159   pthread_barrier_wait (b);
 160
 161   /* Wait a bit more.  */
 162   struct timespec ts = { .tv_sec = 0, .tv_nsec = 10000000 };
 163   nanosleep (&ts, NULL);
 164
 165   /* Send the signal.  */
 166   puts ("sending the signal now");
 167   kill (pid, SIGINT);
 168
 169   /* Wait for the process to terminate.  */
 170   int status;
 171   if (TEMP_FAILURE_RETRY (waitpid (pid, &status, 0)) != pid)
 172     {
 173       puts ("wrong child reported terminated");
 174       exit (1);
 175     }
 176
 177   if (!WIFEXITED (status))
 178     {
 179       if (WIFSIGNALED (status))
 180         printf ("child exited with signal %d\n", WTERMSIG (status));
 181       else
 182         puts ("child didn't exit normally");
 183       exit (1);
 184     }
 185
 186   if (WEXITSTATUS (status) != 0)
 187     {
 188       printf ("exit status %d != 0\n", WEXITSTATUS (status));
 189       exit (1);
 190     }
 191
 192   return 0;
 193 }
 194
 195 #define TEST_FUNCTION do_test ()
 196 #include "../test-skeleton.c"