src/hotspot/share/gc/shared/cardTableBarrierSet.hpp

@@ -81,14 +81,12 @@
  
    // Operations on arrays, or general regions (e.g., for "clone") may be
    // optimized by some barriers.
  
    // Below length is the # array elements being written
-   virtual void write_ref_array_pre(oop* dst, size_t length,
-                                    bool dest_uninitialized) {}
-   virtual void write_ref_array_pre(narrowOop* dst, size_t length,
-                                    bool dest_uninitialized) {}
+   virtual void write_ref_array_pre(oop* dst, size_t length) {}
+   virtual void write_ref_array_pre(narrowOop* dst, size_t length) {}
    // Below count is the # array elements being written, starting
    // at the address "start", which may not necessarily be HeapWord-aligned
    inline void write_ref_array(HeapWord* start, size_t count);
  
    CardTable* card_table() { return _card_table.load_relaxed(); }

@@ -121,10 +119,15 @@
  
      template <typename T>
      static OopCopyResult oop_arraycopy_in_heap(arrayOop src_obj, size_t src_offset_in_bytes, T* src_raw,
                                                 arrayOop dst_obj, size_t dst_offset_in_bytes, T* dst_raw,
                                                 size_t length);
+   private:
+     // Failing checkcast or check null during copy, still needs barrier
+     template <typename T>
+     static inline void oop_arraycopy_partial_barrier(BarrierSetT *bs, T* dst_raw, T* p);
+   public:
  
      static void clone_in_heap(oop src, oop dst, size_t size);
  
      static void oop_store_in_heap_at(oop base, ptrdiff_t offset, oop value) {
        oop_store_in_heap(AccessInternal::oop_field_addr<decorators>(base, offset), value);

@@ -135,10 +138,13 @@
      }
  
      static oop oop_atomic_cmpxchg_in_heap_at(oop base, ptrdiff_t offset, oop compare_value, oop new_value) {
        return oop_atomic_cmpxchg_in_heap(AccessInternal::oop_field_addr<decorators>(base, offset), compare_value, new_value);
      }
+ 
+     static void value_copy_in_heap(const ValuePayload& src, const ValuePayload& dst);
+     static void value_store_null_in_heap(const ValuePayload& dst);
    };
  };
  
  template<>
  struct BarrierSet::GetName<CardTableBarrierSet> {