--- a/src/hotspot/share/gc/shared/collectedHeap.hpp	Fri Oct 13 14:02:01 2017 +0200
+++ b/src/hotspot/share/gc/shared/collectedHeap.hpp	Fri Oct 13 15:08:56 2017 +0200
@@ -289,10 +289,6 @@
     return p == NULL || is_in_closed_subset(p);
   }
 
-  // An object is scavengable if its location may move during a scavenge.
-  // (A scavenge is a GC which is not a full GC.)
-  virtual bool is_scavengable(const void *p) = 0;
-
   void set_gc_cause(GCCause::Cause v) {
      if (UsePerfData) {
        _gc_lastcause = _gc_cause;
@@ -570,10 +566,14 @@
   void print_heap_before_gc();
   void print_heap_after_gc();
 
+  // An object is scavengable if its location may move during a scavenge.
+  // (A scavenge is a GC which is not a full GC.)
+  virtual bool is_scavengable(oop obj) = 0;
   // Registering and unregistering an nmethod (compiled code) with the heap.
   // Override with specific mechanism for each specialized heap type.
-  virtual void register_nmethod(nmethod* nm);
-  virtual void unregister_nmethod(nmethod* nm);
+  virtual void register_nmethod(nmethod* nm) {}
+  virtual void unregister_nmethod(nmethod* nm) {}
+  virtual void verify_nmethod(nmethod* nmethod) {}
 
   void trace_heap_before_gc(const GCTracer* gc_tracer);
   void trace_heap_after_gc(const GCTracer* gc_tracer);