186   static inline void fill_with_array(HeapWord* start, size_t words, bool zap = true);
 187 
 188   // Fill with a single object (either an int array or a java.lang.Object).
 189   static inline void fill_with_object_impl(HeapWord* start, size_t words, bool zap = true);
 190 
 191   virtual void trace_heap(GCWhen::Type when, const GCTracer* tracer);
 192 
 193   // Verification functions
 194   virtual void check_for_bad_heap_word_value(HeapWord* addr, size_t size)
 195     PRODUCT_RETURN;
 196   virtual void check_for_non_bad_heap_word_value(HeapWord* addr, size_t size)
 197     PRODUCT_RETURN;
 198   debug_only(static void check_for_valid_allocation_state();)
 199 
 200  public:
 201   enum Name {
 202     None,
 203     Serial,
 204     Parallel,
 205     CMS,
 206     G1

 207   };
 208 
 209   static inline size_t filler_array_max_size() {
 210     return _filler_array_max_size;
 211   }
 212 
 213   virtual Name kind() const = 0;
 214 
 215   virtual const char* name() const = 0;
 216 
 217   /**
 218    * Returns JNI error code JNI_ENOMEM if memory could not be allocated,
 219    * and JNI_OK on success.
 220    */
 221   virtual jint initialize() = 0;
 222 
 223   // In many heaps, there will be a need to perform some initialization activities
 224   // after the Universe is fully formed, but before general heap allocation is allowed.
 225   // This is the correct place to place such initialization methods.
 226   virtual void post_initialize();

 186   static inline void fill_with_array(HeapWord* start, size_t words, bool zap = true);
 187 
 188   // Fill with a single object (either an int array or a java.lang.Object).
 189   static inline void fill_with_object_impl(HeapWord* start, size_t words, bool zap = true);
 190 
 191   virtual void trace_heap(GCWhen::Type when, const GCTracer* tracer);
 192 
 193   // Verification functions
 194   virtual void check_for_bad_heap_word_value(HeapWord* addr, size_t size)
 195     PRODUCT_RETURN;
 196   virtual void check_for_non_bad_heap_word_value(HeapWord* addr, size_t size)
 197     PRODUCT_RETURN;
 198   debug_only(static void check_for_valid_allocation_state();)
 199 
 200  public:
 201   enum Name {
 202     None,
 203     Serial,
 204     Parallel,
 205     CMS,
 206     G1,
 207     Epsilon,
 208   };
 209 
 210   static inline size_t filler_array_max_size() {
 211     return _filler_array_max_size;
 212   }
 213 
 214   virtual Name kind() const = 0;
 215 
 216   virtual const char* name() const = 0;
 217 
 218   /**
 219    * Returns JNI error code JNI_ENOMEM if memory could not be allocated,
 220    * and JNI_OK on success.
 221    */
 222   virtual jint initialize() = 0;
 223 
 224   // In many heaps, there will be a need to perform some initialization activities
 225   // after the Universe is fully formed, but before general heap allocation is allowed.
 226   // This is the correct place to place such initialization methods.
 227   virtual void post_initialize();