--- old/src/hotspot/share/gc/shared/collectedHeap.hpp	2018-10-18 14:45:43.830139774 +0200
+++ new/src/hotspot/share/gc/shared/collectedHeap.hpp	2018-10-18 14:45:43.508125948 +0200
@@ -110,9 +110,6 @@
  protected:
   bool _is_gc_active;
 
-  // Used for filler objects (static, but initialized in ctor).
-  static size_t _filler_array_max_size;
-
   unsigned int _total_collections;          // ... started
   unsigned int _total_full_collections;     // ... started
   NOT_PRODUCT(volatile size_t _promotion_failure_alot_count;)
@@ -147,19 +144,6 @@
   virtual HeapWord* mem_allocate(size_t size,
                                  bool* gc_overhead_limit_was_exceeded) = 0;
 
-  // Filler object utilities.
-  static inline size_t filler_array_hdr_size();
-  static inline size_t filler_array_min_size();
-
-  DEBUG_ONLY(static void fill_args_check(HeapWord* start, size_t words);)
-  DEBUG_ONLY(static void zap_filler_array(HeapWord* start, size_t words, bool zap = true);)
-
-  // Fill with a single array; caller must ensure filler_array_min_size() <=
-  // words <= filler_array_max_size().
-  static inline void fill_with_array(HeapWord* start, size_t words, bool zap = true);
-
-  // Fill with a single object (either an int array or a java.lang.Object).
-  static inline void fill_with_object_impl(HeapWord* start, size_t words, bool zap = true);
 
   virtual void trace_heap(GCWhen::Type when, const GCTracer* tracer);
 
@@ -179,10 +163,6 @@
     Z
   };
 
-  static inline size_t filler_array_max_size() {
-    return _filler_array_max_size;
-  }
-
   virtual Name kind() const = 0;
 
   virtual const char* name() const = 0;
@@ -287,31 +267,6 @@
   virtual oop array_allocate(Klass* klass, int size, int length, bool do_zero, TRAPS);
   virtual oop class_allocate(Klass* klass, int size, TRAPS);
 
-  // Utilities for turning raw memory into filler objects.
-  //
-  // min_fill_size() is the smallest region that can be filled.
-  // fill_with_objects() can fill arbitrary-sized regions of the heap using
-  // multiple objects.  fill_with_object() is for regions known to be smaller
-  // than the largest array of integers; it uses a single object to fill the
-  // region and has slightly less overhead.
-  static size_t min_fill_size() {
-    return size_t(align_object_size(oopDesc::header_size()));
-  }
-
-  static void fill_with_objects(HeapWord* start, size_t words, bool zap = true);
-
-  static void fill_with_object(HeapWord* start, size_t words, bool zap = true);
-  static void fill_with_object(MemRegion region, bool zap = true) {
-    fill_with_object(region.start(), region.word_size(), zap);
-  }
-  static void fill_with_object(HeapWord* start, HeapWord* end, bool zap = true) {
-    fill_with_object(start, pointer_delta(end, start), zap);
-  }
-
-  virtual void fill_with_dummy_object(HeapWord* start, HeapWord* end, bool zap);
-  virtual size_t min_dummy_object_size() const;
-  size_t tlab_alloc_reserve() const;
-
   // Return the address "addr" aligned by "alignment_in_bytes" if such
   // an address is below "end".  Return NULL otherwise.
   inline static HeapWord* align_allocation_or_fail(HeapWord* addr,