Add support for object pool

runtime/vm/raw_object.cc

 // 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.
 
 #include "vm/raw_object.h"
 
 #include "vm/class_table.h"
 #include "vm/freelist.h"
 #include "vm/isolate.h"
 #include "vm/object.h"
@@ skipping 454 matching lines @@
           reinterpret_cast<RawObject**>(entry_point + offset));
     }
   }
   return Code::InstanceSize(length);
 }
 
 
 intptr_t RawInstructions::VisitInstructionsPointers(
     RawInstructions* raw_obj, ObjectPointerVisitor* visitor) {
   RawInstructions* obj = raw_obj->ptr();
-  visitor->VisitPointer(reinterpret_cast<RawObject**>(&obj->code_));
+  visitor->VisitPointers(raw_obj->from(), raw_obj->to());
   return Instructions::InstanceSize(obj->size_);
 }
 
 
 bool RawInstructions::ContainsPC(RawObject* raw_obj, uword pc) {
   uword tags = raw_obj->ptr()->tags_;
   if (RawObject::ClassIdTag::decode(tags) == kInstructionsCid) {
     RawInstructions* raw_instr = reinterpret_cast<RawInstructions*>(raw_obj);
     uword start_pc =
         reinterpret_cast<uword>(raw_instr->ptr()) + Instructions::HeaderSize();
@@ skipping 521 matching lines @@
 
 intptr_t RawWeakProperty::VisitWeakPropertyPointers(
     RawWeakProperty* raw_obj, ObjectPointerVisitor* visitor) {
   // Make sure that we got here with the tagged pointer as this.
   ASSERT(raw_obj->IsHeapObject());
   visitor->VisitPointers(raw_obj->from(), raw_obj->to());
   return WeakProperty::InstanceSize();
 }
 
 }  // namespace dart