1 /* System-specific malloc support functions. Generic version.
2 Copyright (C) 2012-2021 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
7 License as published by the Free Software Foundation; either
8 version 2.1 of the 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; if not, see
17 <https://www.gnu.org/licenses/>. */
18
19 #include <stdbool.h>
20 #include <unistd.h>
21
22 /* Force an unmap when the heap shrinks in a secure exec. This ensures that
23 the old data pages immediately cease to be accessible. */
24 static inline bool
check_may_shrink_heap(void)25 check_may_shrink_heap (void)
26 {
27 return __libc_enable_secure;
28 }
29