gdb/testsuite/gdb.base/foll-vfork.c

   1 /* This testcase is part of GDB, the GNU debugger.
   2
   3    Copyright 1997-2024 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
  21 #include <limits.h>
  22 #include <string.h>
  23
  24 int
  25 main (int argc, char ** argv)
  26 {
  27   int  pid;
  28
  29   /* A statement before vfork to make sure a breakpoint on main isn't
  30      set on vfork below.  */
  31   pid = 1 + argc;
  32   pid = vfork (); /* VFORK */
  33   if (pid == 0) {
  34     char prog[PATH_MAX];
  35     int len;
  36
  37     strcpy (prog, argv[0]);
  38     len = strlen (prog);
  39     /* Replace "foll-vfork" with "vforked-prog".  */
  40     memcpy (prog + len - 10, "vforked-prog", 12);
  41     prog[len + 2] = 0;
  42
  43     execlp (prog, prog, (char *) 0);
  44     perror ("exec failed");
  45     _exit (1);
  46   }
  47   else {
  48     const char *volatile s = "I'm the proud parent of child";
  49   }
  50 }