Prepare for radical source tree reorganization.zack/build-layout-experiment

All top-level files and directories are moved into a temporary storage
directory, REORG.TODO, except for files that will certainly still
exist in their current form at top level when we're done (COPYING,
COPYING.LIB, LICENSES, NEWS, README), all old ChangeLog files (which
are moved to the new directory OldChangeLogs, instead), and the
generated file INSTALL (which is just deleted; in the new order, there
will be no generated files checked into version control).

1 files changed, 0 insertions, 59 deletions

diff --git a/sysdeps/unix/sysv/linux/malloc-sysdep.h b/sysdeps/unix/sysv/linux/malloc-sysdep.h
deleted file mode 100644
index 48cf7c157c..0000000000
--- a/sysdeps/unix/sysv/linux/malloc-sysdep.h
+++ /dev/null
@@ -1,59 +0,0 @@
-/* System-specific malloc support functions.  Linux version.
-   Copyright (C) 2012-2017 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/>.  */
-
-#include <fcntl.h>
-#include <not-cancel.h>
-
-/* The Linux kernel overcommits address space by default and if there is not
-   enough memory available, it uses various parameters to decide the process to
-   kill.  It is however possible to disable or curb this overcommit behavior
-   by setting the proc sysctl vm.overcommit_memory to the value '2' and with
-   that, a process is only allowed to use the maximum of a pre-determined
-   fraction of the total address space.  In such a case, we want to make sure
-   that we are judicious with our heap usage as well, and explicitly give away
-   the freed top of the heap to reduce our commit charge.  See the proc(5) man
-   page to know more about overcommit behavior.
-
-   Other than that, we also force an unmap in a secure exec.  */
-static inline bool
-check_may_shrink_heap (void)
-{
-  static int may_shrink_heap = -1;
-
-  if (__builtin_expect (may_shrink_heap >= 0, 1))
-    return may_shrink_heap;
-
-  may_shrink_heap = __libc_enable_secure;
-
-  if (__builtin_expect (may_shrink_heap == 0, 1))
-    {
-      int fd = open_not_cancel_2 ("/proc/sys/vm/overcommit_memory",
-				  O_RDONLY | O_CLOEXEC);
-      if (fd >= 0)
-	{
-	  char val;
-	  ssize_t n = read_not_cancel (fd, &val, 1);
-	  may_shrink_heap = n > 0 && val == '2';
-	  close_not_cancel_no_status (fd);
-	}
-    }
-
-  return may_shrink_heap;
-}
-
-#define HAVE_MREMAP 1