Support compaction for code space pages.

src/incremental-marking.h

 // Copyright 2011 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 102 matching lines @@
   }
 
   static void RecordWriteFromCode(HeapObject* obj,
                                   Object* value,
                                   Isolate* isolate);
 
   static void RecordWriteForEvacuationFromCode(HeapObject* obj,
                                                Object** slot,
                                                Isolate* isolate);
 
+  inline bool BaseRecordWrite(HeapObject* obj, Object** slot, Object* value);
+
+
   inline void RecordWrite(HeapObject* obj, Object** slot, Object* value);
-  inline void RecordWriteOf(HeapObject* value);
+  inline void RecordWriteIntoCode(HeapObject* obj,
+                                  RelocInfo* rinfo,
+                                  Object* value);
+  void RecordCodeTargetPatch(Address pc, HeapObject* value);
+  void RecordWriteOfCodeEntry(JSFunction* host, Object** slot, Code* value);
+
   inline void RecordWrites(HeapObject* obj);
 
   inline void BlackToGreyAndUnshift(HeapObject* obj, MarkBit mark_bit);
 
   inline void WhiteToGreyAndPush(HeapObject* obj, MarkBit mark_bit);
 
   inline void WhiteToGrey(HeapObject* obj, MarkBit mark_bit);
 
   // Does white->black or grey->grey
   inline bool MarkBlackOrKeepGrey(MarkBit mark_bit) {
@@ skipping 98 matching lines @@
   bool should_hurry_;
   int allocation_marking_factor_;
   intptr_t allocated_;
 
   DISALLOW_IMPLICIT_CONSTRUCTORS(IncrementalMarking);
 };
 
 } }  // namespace v8::internal
 
 #endif  // V8_INCREMENTAL_MARKING_H_