lh | 9ed821d | 2023-04-07 01:36:19 -0700 | [diff] [blame^] | 1 | /* Determine whether block of given size can be allocated on the stack or not. |
| 2 | Copyright (C) 2002-2015 Free Software Foundation, Inc. |
| 3 | This file is part of the GNU C Library. |
| 4 | |
| 5 | The GNU C Library is free software; you can redistribute it and/or |
| 6 | modify it under the terms of the GNU Lesser General Public License as |
| 7 | published by the Free Software Foundation; either version 2.1 of the |
| 8 | License, or (at your option) any later version. |
| 9 | |
| 10 | The GNU C Library is distributed in the hope that it will be useful, |
| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 13 | Lesser General Public License for more details. |
| 14 | |
| 15 | You should have received a copy of the GNU Lesser General Public |
| 16 | License along with the GNU C Library; see the file COPYING.LIB. If |
| 17 | not, see <http://www.gnu.org/licenses/>. */ |
| 18 | |
| 19 | #include <alloca.h> |
| 20 | #include <stdlib.h> |
| 21 | #include <sys/param.h> |
| 22 | #include <pthreadP.h> |
| 23 | |
| 24 | |
| 25 | int |
| 26 | __libc_alloca_cutoff (size_t size) |
| 27 | { |
| 28 | return size <= (MIN (__MAX_ALLOCA_CUTOFF, |
| 29 | THREAD_GETMEM (THREAD_SELF, stackblock_size) / 4 |
| 30 | /* The main thread, before the thread library is |
| 31 | initialized, has zero in the stackblock_size |
| 32 | element. Since it is the main thread we can |
| 33 | assume the maximum available stack space. */ |
| 34 | ?: __MAX_ALLOCA_CUTOFF * 4)); |
| 35 | } |
| 36 | libc_hidden_def (__libc_alloca_cutoff) |