Try enabling (non-incremental) code compaction again.

src/mark-compact.cc

 // 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 791 matching lines @@
         candidate->set_code(shared->code());
       }
 
       // We are in the middle of a GC cycle so the write barrier in the code
       // setter did not record the slot update and we have to do that manually.
       Address slot = candidate->address() + JSFunction::kCodeEntryOffset;
       Code* target = Code::cast(Code::GetObjectFromEntryAddress(slot));
       isolate_->heap()->mark_compact_collector()->
           RecordCodeEntrySlot(slot, target);
 
+      RecordSharedFunctionInfoCodeSlot(shared);
+
       candidate = next_candidate;
     }
 
     jsfunction_candidates_head_ = NULL;
   }
 
 
   void ProcessSharedFunctionInfoCandidates() {
     Code* lazy_compile = isolate_->builtins()->builtin(Builtins::kLazyCompile);
 
     SharedFunctionInfo* candidate = shared_function_info_candidates_head_;
     SharedFunctionInfo* next_candidate;
     while (candidate != NULL) {
       next_candidate = GetNextCandidate(candidate);
       SetNextCandidate(candidate, NULL);
 
       Code* code = candidate->code();
       MarkBit code_mark = Marking::MarkBitFrom(code);
       if (!code_mark.Get()) {
         candidate->set_code(lazy_compile);
       }
 
+      RecordSharedFunctionInfoCodeSlot(candidate);
+
       candidate = next_candidate;
     }
 
     shared_function_info_candidates_head_ = NULL;
   }
 
+  void RecordSharedFunctionInfoCodeSlot(SharedFunctionInfo* shared) {
+    Object** slot = HeapObject::RawField(shared,
+                                         SharedFunctionInfo::kCodeOffset);
+    isolate_->heap()->mark_compact_collector()->
+        RecordSlot(slot, slot, HeapObject::cast(*slot));
+  }
+
   static JSFunction** GetNextCandidateField(JSFunction* candidate) {
     return reinterpret_cast<JSFunction**>(
         candidate->address() + JSFunction::kCodeEntryOffset);
   }
 
   static JSFunction* GetNextCandidate(JSFunction* candidate) {
     return *GetNextCandidateField(candidate);
   }
 
   static void SetNextCandidate(JSFunction* candidate,
@@ skipping 3236 matching lines @@
   while (buffer != NULL) {
     SlotsBuffer* next_buffer = buffer->next();
     DeallocateBuffer(buffer);
     buffer = next_buffer;
   }
   *buffer_address = NULL;
 }
 
 
 } }  // namespace v8::internal