Fix for issue 3071: A zombie AlloctionSite must clear pointer fields.

src/objects-inl.h

 // 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
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 1296 matching lines @@
   set_memento_create_count(Smi::FromInt(0));
   set_memento_found_count(Smi::FromInt(0));
   set_pretenure_decision(Smi::FromInt(0));
   set_dependent_code(DependentCode::cast(GetHeap()->empty_fixed_array()),
                      SKIP_WRITE_BARRIER);
 }
 
 
 void AllocationSite::MarkZombie() {
   ASSERT(!IsZombie());
+  Initialize();
   set_pretenure_decision(Smi::FromInt(kZombie));
-  // Clear all non-smi fields
-  set_transition_info(Smi::FromInt(0));
-  set_dependent_code(DependentCode::cast(GetHeap()->empty_fixed_array()),
-                     SKIP_WRITE_BARRIER);
 }
 
 
 // Heuristic: We only need to create allocation site info if the boilerplate
 // elements kind is the initial elements kind.
 AllocationSiteMode AllocationSite::GetMode(
     ElementsKind boilerplate_elements_kind) {
   if (FLAG_track_allocation_sites &&
       IsFastSmiElementsKind(boilerplate_elements_kind)) {
     return TRACK_ALLOCATION_SITE;
@@ skipping 5148 matching lines @@
 #undef WRITE_UINT32_FIELD
 #undef READ_SHORT_FIELD
 #undef WRITE_SHORT_FIELD
 #undef READ_BYTE_FIELD
 #undef WRITE_BYTE_FIELD
 
 
 } }  // namespace v8::internal
 
 #endif  // V8_OBJECTS_INL_H_