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111
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1 /* Increase stack size limit if possible.
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145
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2 Copyright (C) 2011-2020 Free Software Foundation, Inc.
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111
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3
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4 This file is part of the libiberty library. This library is free
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5 software; you can redistribute it and/or modify it under the
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6 terms of the GNU General Public License as published by the
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7 Free Software Foundation; either version 2, or (at your option)
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8 any later version.
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9
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10 This library is distributed in the hope that it will be useful,
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11 but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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13 GNU General Public License for more details.
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14
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15 You should have received a copy of the GNU General Public License
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16 along with GNU CC; see the file COPYING. If not, write to
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17 the Free Software Foundation, 51 Franklin Street - Fifth Floor,
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18 Boston, MA 02110-1301, USA.
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19
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20 As a special exception, if you link this library with files
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21 compiled with a GNU compiler to produce an executable, this does not cause
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22 the resulting executable to be covered by the GNU General Public License.
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23 This exception does not however invalidate any other reasons why
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24 the executable file might be covered by the GNU General Public License. */
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25
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26 /*
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27
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28 @deftypefn Extension void stack_limit_increase (unsigned long @var{pref})
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29
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30 Attempt to increase stack size limit to @var{pref} bytes if possible.
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31
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32 @end deftypefn
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33
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34 */
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35
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36 #include "config.h"
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37 #include "ansidecl.h"
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38
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39 #ifdef HAVE_STDINT_H
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40 #include <stdint.h>
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41 #endif
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42 #ifdef HAVE_SYS_RESOURCE_H
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43 #include <sys/resource.h>
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44 #endif
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45
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46 void
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47 stack_limit_increase (unsigned long pref ATTRIBUTE_UNUSED)
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48 {
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49 #if defined(HAVE_SETRLIMIT) && defined(HAVE_GETRLIMIT) \
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50 && defined(RLIMIT_STACK) && defined(RLIM_INFINITY)
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51 struct rlimit rlim;
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52 if (getrlimit (RLIMIT_STACK, &rlim) == 0
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53 && rlim.rlim_cur != RLIM_INFINITY
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54 && rlim.rlim_cur < pref
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55 && (rlim.rlim_max == RLIM_INFINITY || rlim.rlim_cur < rlim.rlim_max))
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56 {
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57 rlim.rlim_cur = pref;
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58 if (rlim.rlim_max != RLIM_INFINITY && rlim.rlim_cur > rlim.rlim_max)
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59 rlim.rlim_cur = rlim.rlim_max;
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60 setrlimit (RLIMIT_STACK, &rlim);
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61 }
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62 #endif
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63 }
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