1/* Increase stack size limit if possible. 2 Copyright (C) 2011-2024 Free Software Foundation, Inc. 3 4This file is part of the libiberty library. This library is free 5software; you can redistribute it and/or modify it under the 6terms of the GNU General Public License as published by the 7Free Software Foundation; either version 2, or (at your option) 8any later version. 9 10This library is distributed in the hope that it will be useful, 11but WITHOUT ANY WARRANTY; without even the implied warranty of 12MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13GNU General Public License for more details. 14 15You should have received a copy of the GNU General Public License 16along with GNU CC; see the file COPYING. If not, write to 17the Free Software Foundation, 51 Franklin Street - Fifth Floor, 18Boston, MA 02110-1301, USA. 19 20As a special exception, if you link this library with files 21compiled with a GNU compiler to produce an executable, this does not cause 22the resulting executable to be covered by the GNU General Public License. 23This exception does not however invalidate any other reasons why 24the executable file might be covered by the GNU General Public License. */ 25 26/* 27 28@deftypefn Extension void stack_limit_increase (unsigned long @var{pref}) 29 30Attempt to increase stack size limit to @var{pref} bytes if possible. 31 32@end deftypefn 33 34*/ 35 36#include "config.h" 37#include "ansidecl.h" 38 39#ifdef HAVE_STDINT_H 40#include <stdint.h> 41#endif 42#ifdef HAVE_SYS_RESOURCE_H 43#include <sys/resource.h> 44#endif 45 46void 47stack_limit_increase (unsigned long pref ATTRIBUTE_UNUSED) 48{ 49#if defined(HAVE_SETRLIMIT) && defined(HAVE_GETRLIMIT) \ 50 && defined(RLIMIT_STACK) && defined(RLIM_INFINITY) 51 struct rlimit rlim; 52 if (getrlimit (RLIMIT_STACK, &rlim) == 0 53 && rlim.rlim_cur != RLIM_INFINITY 54 && rlim.rlim_cur < pref 55 && (rlim.rlim_max == RLIM_INFINITY || rlim.rlim_cur < rlim.rlim_max)) 56 { 57 rlim.rlim_cur = pref; 58 if (rlim.rlim_max != RLIM_INFINITY && rlim.rlim_cur > rlim.rlim_max) 59 rlim.rlim_cur = rlim.rlim_max; 60 setrlimit (RLIMIT_STACK, &rlim); 61 } 62#endif 63} 64