* cygthread.cc (cygthread::terminate_thread): Only try to free

	thread stack on systems not freeing it by themselves.
	* wincap.h (wincaps::terminate_thread_frees_stack): New element.
	* wincap.cc: Implement above element throughout.

1 files changed, 13 insertions, 10 deletions

diff --git a/winsup/cygwin/cygthread.cc b/winsup/cygwin/cygthread.cc
index 9e4ce62ac..325b7e879 100644
--- a/winsup/cygwin/cygthread.cc
+++ b/winsup/cygwin/cygthread.cc
@@ -1,7 +1,7 @@
 /* cygthread.cc
 
    Copyright 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2008, 2009,
-   2010, 2011, 2012 Red Hat, Inc.
+   2010, 2011, 2012, 2013 Red Hat, Inc.
 
 This software is a copyrighted work licensed under the terms of the
 Cygwin license.  Please consult the file "CYGWIN_LICENSE" for
@@ -313,15 +313,18 @@ cygthread::terminate_thread ()
   if (ev && !(terminated = !IsEventSignalled (ev)))
     ResetEvent (ev);
 
-  MEMORY_BASIC_INFORMATION m;
-  memset (&m, 0, sizeof (m));
-  VirtualQuery (stack_ptr, &m, sizeof m);
-
-  if (!m.RegionSize)
-    system_printf ("m.RegionSize 0?  stack_ptr %p", stack_ptr);
-  else if (!VirtualFree (m.AllocationBase, 0, MEM_RELEASE))
-    debug_printf ("VirtualFree of allocation base %p<%p> failed, %E",
-		   stack_ptr, m.AllocationBase);
+  if (!wincap.terminate_thread_frees_stack ())
+    {
+      MEMORY_BASIC_INFORMATION m;
+      memset (&m, 0, sizeof (m));
+      VirtualQuery (stack_ptr, &m, sizeof m);
+
+      if (!m.RegionSize)
+	system_printf ("m.RegionSize 0?  stack_ptr %p", stack_ptr);
+      else if (!VirtualFree (m.AllocationBase, 0, MEM_RELEASE))
+	debug_printf ("VirtualFree of allocation base %p<%p> failed, %E",
+		       stack_ptr, m.AllocationBase);
+    }
 
   if (is_freerange)
     free (this);