Line data    Source code

       1             : /* Test of optional automatic memory allocation.
       2             :    Copyright (C) 2005, 2007, 2009-2020 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>, 2007.  */
      18             : 
      19             : #include <config.h>
      20             : 
      21             : #include <alloca.h>
      22             : 
      23             : #if HAVE_ALLOCA
      24             : 
      25             : static void
      26     1000000 : do_allocation (int n)
      27             : {
      28     1000000 :   void *ptr = alloca (n);
      29             :   (void) ptr;
      30     1000000 : }
      31             : 
      32             : void (*func) (int) = do_allocation;
      33             : 
      34             : #endif
      35             : 
      36             : int
      37           1 : main ()
      38             : {
      39             : #if HAVE_ALLOCA
      40             :   int i;
      41             : 
      42             :   /* Repeat a lot of times, to make sure there's no memory leak.  */
      43      100001 :   for (i = 0; i < 100000; i++)
      44             :     {
      45             :       /* Try various values.
      46             :          n = 0 gave a crash on Alpha with gcc-2.5.8.
      47             :          Some versions of Mac OS X have a stack size limit of 512 KB.  */
      48      100000 :       func (34);
      49      100000 :       func (134);
      50      100000 :       func (399);
      51      100000 :       func (510823);
      52      100000 :       func (129321);
      53      100000 :       func (0);
      54      100000 :       func (4070);
      55      100000 :       func (4095);
      56      100000 :       func (1);
      57      100000 :       func (16582);
      58             :     }
      59             : #endif
      60             : 
      61           1 :   return 0;
      62             : }