Introduce splaytree.KeyNotFoundError and use it for reporting...

tools/tickprocessor.py

 # Copyright 2008 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
 #       copyright notice, this list of conditions and the following
 #       disclaimer in the documentation and/or other materials provided
@@ skipping 217 matching lines @@
       assembler = self.assemblers.pop(addr)
     else:
       assembler = None
     self.js_entries.Insert(addr, JSCodeEntry(addr, name, type, size, assembler))
 
   def ProcessCodeMove(self, from_addr, to_addr):
     try:
       removed_node = self.js_entries.Remove(from_addr)
       removed_node.value.SetStartAddress(to_addr);
       self.js_entries.Insert(to_addr, removed_node.value)
-    except 'KeyNotFound':
+    except splaytree.KeyNotFoundError:
       print('Code move event for unknown code: 0x%x' % from_addr)
 
   def ProcessCodeDelete(self, from_addr):
     try:
       removed_node = self.js_entries.Remove(from_addr)
       self.deleted_code.append(removed_node.value)
-    except 'KeyNotFound':
+    except splaytree.KeyNotFoundError:
       print('Code delete event for unknown code: 0x%x' % from_addr)
 
   def ProcessBeginCodeRegion(self, id, assm, start, name):
     if not assm in self.pending_assemblers:
       self.pending_assemblers[assm] = Assembler()
     assembler = self.pending_assemblers[assm]
     assembler.pending_regions[id] = CodeRegion(start, name)
 
   def ProcessEndCodeRegion(self, id, assm, end):
     assm = self.pending_assemblers[assm]
@@ skipping 200 matching lines @@
         'req_opts': self.GetRequiredArgsNames()
     })
     sys.exit(2)
 
   def RunLogfileProcessing(self, tick_processor):
     tick_processor.ProcessLogfile(self.log_file, self.state, self.ignore_unknown, self.separate_ic)
 
 
 if __name__ == '__main__':
   sys.exit('You probably want to run windows-tick-processor.py or linux-tick-processor.py.')