Support weak heap references in the ConstantPool to support IsWeakObjectInOptimizedCode objects.

src/objects.cc

 // Copyright 2013 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 9453 matching lines @@
 
 void ConstantPoolArray::ConstantPoolIterateBody(ObjectVisitor* v) {
   for (int i = 0; i < count_of_code_ptr_entries(); i++) {
     int index = first_code_ptr_index() + i;
     v->VisitCodeEntry(reinterpret_cast<Address>(RawFieldOfElementAt(index)));
   }
   for (int i = 0; i < count_of_heap_ptr_entries(); i++) {
     int index = first_heap_ptr_index() + i;
     v->VisitPointer(RawFieldOfElementAt(index));
   }
+  for (int i = 0; i < count_of_weak_ptr_entries(); i++) {
+    int index = first_weak_ptr_index() + i;
+    v->VisitPointer(RawFieldOfElementAt(index));
+  }
 }
 
 
 void JSFunction::JSFunctionIterateBody(int object_size, ObjectVisitor* v) {
   // Iterate over all fields in the body but take care in dealing with
   // the code entry.
   IteratePointers(v, kPropertiesOffset, kCodeEntryOffset);
   v->VisitCodeEntry(this->address() + kCodeEntryOffset);
   IteratePointers(v, kCodeEntryOffset + kPointerSize, object_size);
 }
@@ skipping 7008 matching lines @@
 #define ERROR_MESSAGES_TEXTS(C, T) T,
   static const char* error_messages_[] = {
       ERROR_MESSAGES_LIST(ERROR_MESSAGES_TEXTS)
   };
 #undef ERROR_MESSAGES_TEXTS
   return error_messages_[reason];
 }
 
 
 } }  // namespace v8::internal