tests/test-malloca.c

   1 /* Test of safe automatic memory allocation.
   2    Copyright (C) 2005, 2007, 2009-2024 Free Software Foundation, Inc.
   3
   4    This program is free software: you can redistribute it and/or modify
   5    it under the terms of the GNU General Public License as published by
   6    the Free Software Foundation, either version 3 of the License, or
   7    (at your option) any later version.
   8
   9    This program is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12    GNU General Public License for more details.
  13
  14    You should have received a copy of the GNU General Public License
  15    along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
  16
  17 /* Written by Bruno Haible <bruno@clisp.org>, 2005.  */
  18
  19 #include <config.h>
  20
  21 #include "malloca.h"
  22
  23 #include <stdlib.h>
  24
  25 static void
  26 do_allocation (int n)
  27 {
  28   void *volatile ptr = malloca (n);
  29   freea (ptr);
  30   safe_alloca (n);
  31 }
  32
  33 void (*func) (int) = do_allocation;
  34
  35 int
  36 main ()
  37 {
  38   int i;
  39
  40   /* This slows down malloc a lot.  */
  41   unsetenv ("MALLOC_PERTURB_");
  42
  43   /* Repeat a lot of times, to make sure there's no memory leak.  */
  44   for (i = 0; i < 50000; i++)
  45     {
  46       /* Try various values.
  47          n = 0 gave a crash on Alpha with gcc-2.5.8.
  48          Some versions of Mac OS X have a stack size limit of 512 KB.  */
  49       func (34);
  50       func (134);
  51       func (399);
  52       func (510823);
  53       func (129321);
  54       func (0);
  55       func (4070);
  56       func (4095);
  57       func (1);
  58       func (16582);
  59     }
  60
  61   return 0;
  62 }