Add support for object pool

runtime/vm/debugger.h

 // Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 #ifndef VM_DEBUGGER_H_
 #define VM_DEBUGGER_H_
 
 #include "include/dart_debugger_api.h"
 
 #include "vm/object.h"
@@ skipping 77 matching lines @@
   void set_next(CodeBreakpoint* value) { next_ = value; }
   CodeBreakpoint* next() const { return this->next_; }
   intptr_t pc_desc_index() const { return pc_desc_index_; }
 
   void PatchCode();
   void RestoreCode();
   void PatchFunctionReturn();
   void RestoreFunctionReturn();
 
   RawFunction* function_;
+  const Code& code_;

[srdjan, 2013/02/15 21:24:27]

Remove function_ use RawCode* instead Code.

[regis, 2013/02/15 22:51:31]

The purpose of the member code_ was to cache the Code object in order to prevent
repeated allocation of handles.
Since handles cannot be used here, caching is not useful. Field is removed.

   intptr_t pc_desc_index_;
   intptr_t token_pos_;
   uword pc_;
   intptr_t line_number_;
   bool is_enabled_;
 
   SourceBreakpoint* src_bpt_;
   CodeBreakpoint* next_;
 
   PcDescriptors::Kind breakpoint_kind_;
@@ skipping 274 matching lines @@
   static EventHandler* event_handler_;
 
   friend class SourceBreakpoint;
   DISALLOW_COPY_AND_ASSIGN(Debugger);
 };
 
 
 }  // namespace dart
 
 #endif  // VM_DEBUGGER_H_