gdb/testsuite/gdb.threads/vfork-follow-child-exit.c

   1 /* This testcase is part of GDB, the GNU debugger.
   2
   3    Copyright 2019-2020 Free Software Foundation, Inc.
   4
   5    This program is free software; you can redistribute it and/or modify
   6    it under the terms of the GNU General Public License as published by
   7    the Free Software Foundation; either version 3 of the License, or
   8    (at your option) any later version.
   9
  10    This program 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
  13    GNU General Public License for more details.
  14
  15    You should have received a copy of the GNU General Public License
  16    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  17
  18 #include <stdio.h>
  19 #include <unistd.h>
  20 #include <pthread.h>
  21
  22 static void *
  23 f (void *arg)
  24 {
  25   int res = vfork ();
  26
  27   if (res == -1)
  28     {
  29       perror ("vfork");
  30       return NULL;
  31     }
  32   else if (res == 0)
  33     {
  34       /* Child.  */
  35       _exit (0);
  36     }
  37   else
  38     {
  39       /* Parent.  */
  40       return NULL;
  41     }
  42 }
  43
  44 int
  45 main (void)
  46 {
  47   pthread_t tid;
  48
  49   pthread_create (&tid, NULL, f, NULL);
  50   pthread_join (tid, NULL);
  51   return 0;
  52 }