1 /* Test of optional automatic memory allocation. 2 Copyright (C) 2005, 2007, 2009-2021 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 do_allocation (int n) /* */ 27 { 28 void *volatile ptr = alloca (n); 29 (void) ptr; 30 } 31 32 void (*func) (int) = do_allocation; 33 34 #endif 35 36 int 37 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 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 func (34); 49 func (134); 50 func (399); 51 func (510823); 52 func (129321); 53 func (0); 54 func (4070); 55 func (4095); 56 func (1); 57 func (16582); 58 } 59 #endif 60 61 return 0; 62 }