* win/tclWin32Dll.c (TclpCheckStackSpace):

* tests/stack.test (stack-3.1): Fix for undetected stack
overflow in TclReExec on Windows. [Bug 947070]

3 files changed, 39 insertions, 3 deletions

diff --git a/ChangeLog b/ChangeLog
index 47bf86f..13d21b4 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,9 @@
+2004-05-03  Kevin Kenny  <kennykb@acm.org>
+
+	* win/tclWin32Dll.c (TclpCheckStackSpace):
+	* tests/stack.test (stack-3.1): Fix for undetected stack
+	overflow in TclReExec on Windows. [Bug 947070]
+	
 2004-05-03  Don Porter  <dgp@users.sourceforge.net>
 
         * library/init.tcl:     Corrected unique prefix matching of
diff --git a/tests/stack.test b/tests/stack.test
index 828352b..f5d849b 100644
--- a/tests/stack.test
+++ b/tests/stack.test
@@ -9,7 +9,7 @@
 # See the file "license.terms" for information on usage and redistribution
 # of this file, and for a DISCLAIMER OF ALL WARRANTIES.
 #
-# RCS: @(#) $Id: stack.test,v 1.15 2002/07/29 00:25:49 msofer Exp $
+# RCS: @(#) $Id: stack.test,v 1.15.2.1 2004/05/03 18:01:36 kennykb Exp $
 
 if {[lsearch [namespace children] ::tcltest] == -1} {
     package require tcltest 2
@@ -55,6 +55,36 @@ test stack-2.1 {maxNestingDepth reached on infinite recursion} {minStack2400} {
     set msg
 } {too many nested evaluations (infinite loop?)}
 
+# Make sure that there is enough stack to run regexp even if we're
+# close to the recursion limit. [Bug 947070]
+
+test stack-3.1 {enough room for regexp near recursion limit} \
+    -constraints { win } \
+    -setup {
+	set ::limit [interp recursionlimit {} 10000]
+	set ::depth 0
+	proc a { max } {
+	    if { [info level] < $max } {
+		set ::depth [info level]
+		a $max
+	    } else {
+		regexp {^ ?} x
+	    }
+	}
+	list [catch { a 10001 }]
+	incr depth -3
+	set depth2 $depth
+    } -body {
+	list [catch { a $::depth } result] \
+	    $result [expr { $::depth2 - $::depth }]
+    } -cleanup {
+	interp recursionlimit {} $::limit
+    } -result {0 1 1}
+
 # cleanup
 ::tcltest::cleanupTests
 return
+
+# Local Variables:
+# mode: tcl
+# End:
diff --git a/win/tclWinInt.h b/win/tclWinInt.h
index ce09ce3..7ff2775 100644
--- a/win/tclWinInt.h
+++ b/win/tclWinInt.h
@@ -8,7 +8,7 @@
  * See the file "license.terms" for information on usage and redistribution
  * of this file, and for a DISCLAIMER OF ALL WARRANTIES.
  *
- * RCS: @(#) $Id: tclWinInt.h,v 1.20.2.2 2004/03/21 20:59:28 hobbs Exp $
+ * RCS: @(#) $Id: tclWinInt.h,v 1.20.2.3 2004/05/03 18:01:37 kennykb Exp $
  */
 
 #ifndef _TCLWININT
@@ -27,7 +27,7 @@
  * to help avoid overflowing the stack in the case of infinite recursion.
  */
 
-#define TCL_WIN_STACK_THRESHOLD 0x2000
+#define TCL_WIN_STACK_THRESHOLD 0x8000
 
 #ifdef BUILD_tcl
 # undef TCL_STORAGE_CLASS