htl/tests/test-5.c

   1 /* Test signals.
   2    Copyright (C) 2000-2021 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   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 #define _GNU_SOURCE
  20
  21 #include <pthread.h>
  22 #include <unistd.h>
  23 #include <stdio.h>
  24 #include <errno.h>
  25 #include <error.h>
  26 #include <assert.h>
  27 #include <sys/resource.h>
  28 #include <sys/wait.h>
  29
  30 void *
  31 thr (void *arg)
  32 {
  33   *(int *) 0 = 0;
  34   return 0;
  35 }
  36
  37 int foobar;
  38
  39 int
  40 main (int argc, char *argv[])
  41 {
  42   error_t err;
  43   pid_t child;
  44
  45   struct rlimit limit;
  46
  47   limit.rlim_cur = 0;
  48   limit.rlim_max = 0;
  49
  50   err = setrlimit (RLIMIT_CORE, &limit);
  51   if (err)
  52     error (1, err, "setrlimit");
  53
  54   child = fork ();
  55   switch (child)
  56     {
  57     case -1:
  58       error (1, errno, "fork");
  59       break;
  60
  61     case 0:
  62       {
  63         pthread_t tid;
  64         void *ret;
  65
  66         err = pthread_create (&tid, 0, thr, 0);
  67         if (err)
  68           error (1, err, "pthread_create");
  69
  70         err = pthread_join (tid, &ret);
  71         assert_perror (err);
  72
  73         /* Should have never returned.  Our parent expects us to fail
  74            thus we succeed and indicate the error.  */
  75         return 0;
  76       }
  77
  78     default:
  79       {
  80         pid_t pid;
  81         int status;
  82
  83         pid = waitpid (child, &status, 0);
  84         printf ("pid = %d; child = %d; status = %d\n", pid, child, status);
  85         assert (pid == child);
  86         assert (status != 0);
  87       }
  88     }
  89
  90   return 0;
  91 }