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      1 /* This testcase is part of GDB, the GNU debugger.
      2 
      3    Copyright 2019-2024 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 #include <string.h>
     22 #include <stdlib.h>
     23 
     24 static char *program_name;
     25 
     26 static void *
     27 f (void *arg)
     28 {
     29   int res = vfork ();
     30 
     31   if (res == -1)
     32     {
     33       perror ("vfork");
     34       return NULL;
     35     }
     36   else if (res == 0)
     37     {
     38       /* Child.  */
     39       execl (program_name, program_name, "1", NULL);
     40       perror ("exec");
     41       abort ();
     42     }
     43   else
     44     {
     45       /* Parent.  */
     46       return NULL;
     47     }
     48 }
     49 
     50 int
     51 main (int argc, char **argv)
     52 {
     53   pthread_t tid;
     54 
     55   if (argc > 1)
     56     {
     57       /* Getting here via execl.  */
     58       return 0;
     59     }
     60 
     61   program_name = argv[0];
     62 
     63   pthread_create (&tid, NULL, f, NULL);
     64   pthread_join (tid, NULL);
     65   return 0;
     66 }
     67