source: kBuild/trunk/src/grep/gnulib-tests/test-malloca.c@ 3532

/* Test of safe automatic memory allocation.
   Copyright (C) 2005, 2007, 2009-2021 Free Software Foundation, Inc.

   This program is free software: you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 3 of the License, or
   (at your option) any later version.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */

/* Written by Bruno Haible <[email protected]>, 2005.  */

#include <config.h>

#include "malloca.h"

#include <stdlib.h>

static void
do_allocation (int n)
{
  void *volatile ptr = malloca (n);
  freea (ptr);
  safe_alloca (n);
}

void (*func) (int) = do_allocation;

int
main ()
{
  int i;

  /* This slows down malloc a lot.  */
  unsetenv ("MALLOC_PERTURB_");

  /* Repeat a lot of times, to make sure there's no memory leak.  */
  for (i = 0; i < 50000; i++)
    {
      /* Try various values.
         n = 0 gave a crash on Alpha with gcc-2.5.8.
         Some versions of Mac OS X have a stack size limit of 512 KB.  */
      func (34);
      func (134);
      func (399);
      func (510823);
      func (129321);
      func (0);
      func (4070);
      func (4095);
      func (1);
      func (16582);
    }

  return 0;
}