-- --
-- B o d y --
-- --
--- Copyright (C) 1995-2001 Free Software Foundation, Inc. --
+-- Copyright (C) 1995-2009, Free Software Foundation, Inc. --
-- --
-- GNAT is free software; you can redistribute it and/or modify it under --
-- terms of the GNU General Public License as published by the Free Soft- --
--- ware Foundation; either version 2, or (at your option) any later ver- --
+-- ware Foundation; either version 3, or (at your option) any later ver- --
-- sion. GNAT is distributed in the hope that it will be useful, but WITH- --
-- OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY --
--- or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License --
--- for more details. You should have received a copy of the GNU General --
--- Public License distributed with GNAT; see file COPYING. If not, write --
--- to the Free Software Foundation, 51 Franklin Street, Fifth Floor, --
--- Boston, MA 02110-1301, USA. --
+-- or FITNESS FOR A PARTICULAR PURPOSE. --
-- --
--- As a special exception, if other files instantiate generics from this --
--- unit, or you link this unit with other files to produce an executable, --
--- this unit does not by itself cause the resulting executable to be --
--- covered by the GNU General Public License. This exception does not --
--- however invalidate any other reasons why the executable file might be --
--- covered by the GNU Public License. --
+-- As a special exception under Section 7 of GPL version 3, you are granted --
+-- additional permissions described in the GCC Runtime Library Exception, --
+-- version 3.1, as published by the Free Software Foundation. --
+-- --
+-- You should have received a copy of the GNU General Public License and --
+-- a copy of the GCC Runtime Library Exception along with this program; --
+-- see the files COPYING3 and COPYING.RUNTIME respectively. If not, see --
+-- <http://www.gnu.org/licenses/>. --
-- --
-- GNAT was originally developed by the GNAT team at New York University. --
-- Extensive contributions were provided by Ada Core Technologies Inc. --
-- --
------------------------------------------------------------------------------
+-- This is the default (used on all native platforms) version of this package
+
+pragma Compiler_Unit;
+
package body System.Parameters is
-------------------------
begin
if Size = Unspecified_Size then
return Default_Stack_Size;
-
elsif Size < Minimum_Stack_Size then
return Minimum_Stack_Size;
-
else
return Size;
end if;
------------------------
function Default_Stack_Size return Size_Type is
+ Default_Stack_Size : Integer;
+ pragma Import (C, Default_Stack_Size, "__gl_default_stack_size");
begin
- return 20 * 1024;
+ if Default_Stack_Size = -1 then
+ return 2 * 1024 * 1024;
+ else
+ return Size_Type (Default_Stack_Size);
+ end if;
end Default_Stack_Size;
------------------------
function Minimum_Stack_Size return Size_Type is
begin
- return 8 * 1024;
+ -- 12K is required for stack-checking to work reliably on most platforms
+ -- when using the GCC scheme to propagate an exception in the ZCX case.
+ -- 16K is the value of PTHREAD_STACK_MIN under Linux, so is a reasonable
+ -- default.
+
+ return 16 * 1024;
end Minimum_Stack_Size;
end System.Parameters;
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