Clean up stack-coloring macros.

1 files changed, 29 insertions, 0 deletions

diff --git a/nptl/stack-aliasing.h b/nptl/stack-aliasing.h
new file mode 100644
index 0000000000..526b54e18f
--- /dev/null
+++ b/nptl/stack-aliasing.h
@@ -0,0 +1,29 @@
+/* Define macros for stack address aliasing issues for NPTL.  Stub version.
+   Copyright (C) 2014 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/>.  */
+
+/* This is a number of bytes (less than a page) by which to "color" the
+   starting stack address of new threads.  This number is multiplied by the
+   number of threads created so far and then truncated modulo page size,
+   to get a roughly even distribution of values for different threads.  */
+#define COLORING_INCREMENT      0
+
+/* This is a number of bytes that is an alignment that should be avoided
+   when choosing the exact size of a new thread's stack.  If the size
+   chosen is aligned to this, an extra page will be added to render the
+   size off-aligned.  */
+#define MULTI_PAGE_ALIASING     0