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authorRoland McGrath <roland@hack.frob.com>2014-06-20 19:50:16 -0700
committerRoland McGrath <roland@hack.frob.com>2014-06-20 19:50:16 -0700
commit93a6d0820430bfe3d09695a1376c07abf6d2214f (patch)
tree9c807deb1d686bd2e6ff3874f27f9e668a9ed810 /nptl
parentbc4a86fa214fe78f568f6959f29a53d3927a809e (diff)
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Clean up stack-coloring macros.
Diffstat (limited to 'nptl')
-rw-r--r--nptl/allocatestack.c1
-rw-r--r--nptl/stack-aliasing.h29
2 files changed, 30 insertions, 0 deletions
diff --git a/nptl/allocatestack.c b/nptl/allocatestack.c
index d0d155c056..9095ef430d 100644
--- a/nptl/allocatestack.c
+++ b/nptl/allocatestack.c
@@ -30,6 +30,7 @@
#include <list.h>
#include <lowlevellock.h>
#include <kernel-features.h>
+#include <stack-aliasing.h>
#ifndef NEED_SEPARATE_REGISTER_STACK
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