gdb/testsuite/gdb.threads/threads-after-exec.c

   1 /* This testcase is part of GDB, the GNU debugger.
   2
   3    Copyright 2023 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 <pthread.h>
  19 #include <unistd.h>
  20 #include <stdlib.h>
  21 #include <stdio.h>
  22
  23 static char *program_name;
  24
  25 void *
  26 thread_execler (void *arg)
  27 {
  28   /* Exec ourselves again, but with an extra argument, to avoid
  29      infinite recursion.  */
  30   if (execl (program_name, program_name, "1", NULL) == -1)
  31     {
  32       perror ("execl");
  33       abort ();
  34     }
  35
  36   return NULL;
  37 }
  38
  39 int
  40 main (int argc, char **argv)
  41 {
  42   pthread_t thread;
  43
  44   if (argc > 1)
  45     {
  46       /* Getting here via execl.  */
  47       return 0;
  48     }
  49
  50   program_name = argv[0];
  51
  52   pthread_create (&thread, NULL, thread_execler, NULL);
  53   pthread_join (thread, NULL);
  54
  55   return 0;
  56 }