malloc-sysdep.h 1.1 KB

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  1. /* System-specific malloc support functions. Generic version.
  2. Copyright (C) 2012-2019 Free Software Foundation, Inc.
  3. This file is part of the GNU C Library.
  4. The GNU C Library is free software; you can redistribute it and/or
  5. modify it under the terms of the GNU Lesser General Public
  6. License as published by the Free Software Foundation; either
  7. version 2.1 of the License, or (at your option) any later version.
  8. The GNU C Library is distributed in the hope that it will be useful,
  9. but WITHOUT ANY WARRANTY; without even the implied warranty of
  10. MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
  11. Lesser General Public License for more details.
  12. You should have received a copy of the GNU Lesser General Public
  13. License along with the GNU C Library; if not, see
  14. <http://www.gnu.org/licenses/>. */
  15. #include <stdbool.h>
  16. #include <unistd.h>
  17. /* Force an unmap when the heap shrinks in a secure exec. This ensures that
  18. the old data pages immediately cease to be accessible. */
  19. static inline bool
  20. check_may_shrink_heap (void)
  21. {
  22. return __libc_enable_secure;
  23. }