--- a/src/hotspot/share/gc/shared/collectedHeap.hpp	Fri Aug 23 08:48:23 2019 +0200
+++ b/src/hotspot/share/gc/shared/collectedHeap.hpp	Fri Aug 23 08:48:27 2019 +0200
@@ -254,9 +254,9 @@
   }
   GCCause::Cause gc_cause() { return _gc_cause; }
 
-  virtual oop obj_allocate(Klass* klass, int size, TRAPS);
+  oop obj_allocate(Klass* klass, int size, TRAPS);
   virtual oop array_allocate(Klass* klass, int size, int length, bool do_zero, TRAPS);
-  virtual oop class_allocate(Klass* klass, int size, TRAPS);
+  oop class_allocate(Klass* klass, int size, TRAPS);
 
   // Utilities for turning raw memory into filler objects.
   //

--- a/src/hotspot/share/gc/shared/memAllocator.hpp	Fri Aug 23 08:48:23 2019 +0200
+++ b/src/hotspot/share/gc/shared/memAllocator.hpp	Fri Aug 23 08:48:27 2019 +0200
@@ -61,11 +61,9 @@
   // that must be parseable as an oop by concurrent collectors.
   virtual oop finish(HeapWord* mem) const;
 
-  // Raw memory allocation. This may or may not use TLAB allocations to satisfy the
-  // allocation. A GC implementation may override this function to satisfy the allocation
-  // in any way. But the default is to try a TLAB allocation, and otherwise perform
-  // mem_allocate.
-  virtual HeapWord* mem_allocate(Allocation& allocation) const;
+  // Raw memory allocation. This will try to do a TLAB allocation, and otherwise fall
+  // back to calling CollectedHeap::mem_allocate().
+  HeapWord* mem_allocate(Allocation& allocation) const;
 
   virtual MemRegion obj_memory_range(oop obj) const {
     return MemRegion((HeapWord*)obj, _word_size);