nptl/stack-aliasing.h

   1 /* Define macros for stack address aliasing issues for NPTL.  Stub version.
   2    Copyright (C) 2014 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, see
  17    <http://www.gnu.org/licenses/>.  */
  18
  19 /* This is a number of bytes (less than a page) by which to "color" the
  20    starting stack address of new threads.  This number is multiplied by the
  21    number of threads created so far and then truncated modulo page size,
  22    to get a roughly even distribution of values for different threads.  */
  23 #define COLORING_INCREMENT      0
  24
  25 /* This is a number of bytes that is an alignment that should be avoided
  26    when choosing the exact size of a new thread's stack.  If the size
  27    chosen is aligned to this, an extra page will be added to render the
  28    size off-aligned.  */
  29 #define MULTI_PAGE_ALIASING     0