gdb/testsuite/gdb.base/step-over-clone.c

   1 /* This testcase is part of GDB, the GNU debugger.
   2
   3    Copyright 2016-2019 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 #define _GNU_SOURCE
  19 #include <stdlib.h>
  20 #include <unistd.h>
  21 #include <sched.h>
  22
  23 static void
  24 marker ()
  25 {}
  26
  27 #define STACK_SIZE 0x1000
  28
  29 static int
  30 clone_fn (void *unused)
  31 {
  32   return 0;
  33 }
  34
  35 int
  36 main (void)
  37 {
  38   int i, pid;
  39   unsigned char *stack[6];
  40
  41   for (i = 0; i < (sizeof (stack) / sizeof (stack[0])); i++)
  42     stack[i] = malloc (STACK_SIZE);
  43
  44   for (i = 0; i < (sizeof (stack) / sizeof (stack[0])); i++)
  45     {
  46       pid = clone (clone_fn, stack[i] + STACK_SIZE, CLONE_FILES | CLONE_VM,
  47                    NULL);
  48     }
  49
  50   for (i = 0; i < (sizeof (stack) / sizeof (stack[0])); i++)
  51     free (stack[i]);
  52
  53   marker ();
  54 }