diff -r 7d5a286cdf89 -r f1ebd584cdf3 hotspot/src/share/vm/runtime/globals.hpp
--- a/hotspot/src/share/vm/runtime/globals.hpp	Wed Apr 26 10:26:39 2017 +0200
+++ b/hotspot/src/share/vm/runtime/globals.hpp	Wed Apr 26 13:20:23 2017 +0200
@@ -186,6 +186,7 @@
   void* _addr;
   NOT_PRODUCT(const char* _doc;)
   Flags _flags;
+  size_t _name_len;
 
   // points to all Flags static array
   static Flag* flags;
@@ -247,6 +248,8 @@
   Flags get_origin();
   void set_origin(Flags origin);
 
+  size_t get_name_length();
+
   bool is_default();
   bool is_ergonomic();
   bool is_command_line();