--- old/src/hotspot/share/gc/g1/g1CollectedHeap.hpp	2018-04-23 13:45:31.840436898 +0200
+++ new/src/hotspot/share/gc/g1/g1CollectedHeap.hpp	2018-04-23 13:45:31.496423327 +0200
@@ -420,7 +420,9 @@
   //   humongous allocation requests should go to mem_allocate() which
   //   will satisfy them with a special path.
 
-  virtual HeapWord* allocate_new_tlab(size_t word_size);
+  virtual HeapWord* allocate_new_tlab(size_t min_word_size,
+                                      size_t desired_word_size,
+                                      size_t* actual_word_size);
 
   virtual HeapWord* mem_allocate(size_t word_size,
                                  bool*  gc_overhead_limit_was_exceeded);
@@ -428,7 +430,10 @@
   // First-level mutator allocation attempt: try to allocate out of
   // the mutator alloc region without taking the Heap_lock. This
   // should only be used for non-humongous allocations.
-  inline HeapWord* attempt_allocation(size_t word_size);
+  inline HeapWord* attempt_allocation(size_t min_word_size,
+                                      size_t desired_word_size,
+                                      size_t* actual_word_size);
+
 
   // Second-level mutator allocation attempt: take the Heap_lock and
   // retry the allocation attempt, potentially scheduling a GC