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[Ada] Fix stack usage for windows-64

Message ID 20110927094829.GA6252@adacore.com
State New
Headers show

Commit Message

Arnaud Charlet Sept. 27, 2011, 9:48 a.m. UTC 
According to some experiments, the guard area size is 16KB on Windows 64.
(Stack size must be a multiple of the allocation granularity - 64KB - to
 get better guard size estimation).
No OS independant testcase.

Tested on x86_64-pc-linux-gnu, committed on trunk

2011-09-27  Tristan Gingold  <gingold@adacore.com>

	* s-tassta.adb (Task_Wrapper): Increase Guard_Page_Size value for
	windows 64.
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Patch

Index: s-tassta.adb
===================================================================
--- s-tassta.adb	(revision 179247)
+++ s-tassta.adb	(working copy)
@@ -1164,7 +1164,7 @@ 
 
       if System.Stack_Usage.Is_Enabled then
          declare
-            Guard_Page_Size : constant := 12 * 1024;
+            Guard_Page_Size : constant := 16 * 1024;
             --  Part of the stack used as a guard page. This is an OS dependent
             --  value, so we need to use the maximum. This value is only used
             --  when the stack address is known, that is currently Windows.