1 files changed, 25 insertions, 0 deletions
diff --git a/sysdeps/generic/malloc-sysdep.h b/sysdeps/generic/malloc-sysdep.h
new file mode 100644
index 0000000000..bbc48c04f0
--- /dev/null
+++ b/sysdeps/generic/malloc-sysdep.h
@@ -0,0 +1,25 @@
+/* System-specific malloc support functions.  Generic version.
+   Copyright (C) 2012 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.  */
+
+/* Force an unmap when the heap shrinks in a secure exec.  This ensures that
+   the old data pages immediately cease to be accessible.  */
+static inline bool
+check_may_shrink_heap (void)
+{
+  return __libc_enable_secure;
+}