grokdump: fix Oddball printing

tools/grokdump.py

 #!/usr/bin/env python
 #
 # Copyright 2012 the V8 project authors. All rights reserved.
 # Redistribution and use in source and binary forms, with or without
 # modification, are permitted provided that the following conditions are
 # met:
 #
 #     * Redistributions of source code must retain the above copyright
 #       notice, this list of conditions and the following disclaimer.
 #     * Redistributions in binary form must reproduce the above
@@ skipping 1120 matching lines @@
   def __init__(self, heap, map, address):
     HeapObject.__init__(self, heap, map, address)
     self.to_string = self.ObjectField(self.ToStringOffset())
     self.kind = self.SmiField(self.KindOffset())
 
   def Print(self, p):
     p.Print(str(self))
 
   def __str__(self):
     if self.to_string:
-      return "Oddball(%08x, <%s>)" % (self.address, self.to_string.GetChars())
+      return "Oddball(%08x, <%s>)" % (self.address, str(self.to_string))
     else:
       kind = "???"
       if 0 <= self.kind < len(Oddball.KINDS):
         kind = Oddball.KINDS[self.kind]
       return "Oddball(%08x, kind=%s)" % (self.address, kind)
 
 
 class FixedArray(HeapObject):
   def LengthOffset(self):
     return self.heap.PointerSize()
@@ skipping 842 matching lines @@
   options, args = parser.parse_args()
   if os.path.exists(options.objdump):
     disasm.OBJDUMP_BIN = options.objdump
     OBJDUMP_BIN = options.objdump
   else:
     print "Cannot find %s, falling back to default objdump" % options.objdump
   if len(args) != 1:
     parser.print_help()
     sys.exit(1)
   AnalyzeMinidump(options, args[0])