[pypy-svn] r71290 - pypy/branch/debug-vref/pypy/rpython/lltypesystem

[arigo at codespeak.net]

Author: arigo
Date: Thu Feb 18 15:46:35 2010
New Revision: 71290

Modified:
   pypy/branch/debug-vref/pypy/rpython/lltypesystem/rclass.py
Log:
Add a negative number (-42) in the first word of vtables.


Modified: pypy/branch/debug-vref/pypy/rpython/lltypesystem/rclass.py
==============================================================================
--- pypy/branch/debug-vref/pypy/rpython/lltypesystem/rclass.py	(original)
+++ pypy/branch/debug-vref/pypy/rpython/lltypesystem/rclass.py	Thu Feb 18 15:46:35 2010
@@ -62,6 +62,7 @@
                            'typeptr': True})
 OBJECTPTR = Ptr(OBJECT)
 OBJECT_VTABLE.become(Struct('object_vtable',
+                            ('debug_minusfortytwo', Signed),
                             #('parenttypeptr', CLASSTYPE),
                             ('subclassrange_min', Signed),
                             ('subclassrange_max', Signed),
@@ -184,6 +185,7 @@
         given subclass."""
         if self.classdef is None:
             # initialize the 'subclassrange_*' and 'name' fields
+            vtable.debug_minusfortytwo = -42
             if rsubcls.classdef is not None:
                 #vtable.parenttypeptr = rsubcls.rbase.getvtable()
                 vtable.subclassrange_min = rsubcls.classdef.minid