--- old/src/share/vm/oops/constMethod.hpp	2017-06-29 15:57:40.088526250 -0700
+++ new/src/share/vm/oops/constMethod.hpp	2017-06-29 15:57:39.908519330 -0700
@@ -368,6 +368,10 @@
 
   int size() const                    { return _constMethod_size;}
   void set_constMethod_size(int size)     { _constMethod_size = size; }
+
+  // ConstMethods should be stored in the read-only region of CDS archive.
+  static bool is_read_only_by_default() { return true; }
+
 #if INCLUDE_SERVICES
   void collect_statistics(KlassSizeStats *sz) const;
 #endif
@@ -528,6 +532,8 @@
   bool is_klass() const { return false; }
   DEBUG_ONLY(bool on_stack() { return false; })
 
+  void metaspace_pointers_do(MetaspaceClosure* it);
+  MetaspaceObj::Type type() const { return ConstMethodType; }
 private:
   // Since the size of the compressed line number table is unknown, the
   // offsets of the other variable sized sections are computed backwards