src/share/vm/classfile/javaClasses.hpp

*** 979,988 ****
--- 979,1016 ----
  
    static int conversion_offset_in_bytes()       { return _conversion_offset; }
  };
  
  
+ // A simple class that maintains an invocation count
+ class java_lang_invoke_CountingMethodHandle: public java_lang_invoke_MethodHandle {
+   friend class JavaClasses;
+ 
+  private:
+   static int _vmcount_offset;
+   static void compute_offsets();
+ 
+  public:
+   // Accessors
+   static int            vmcount(oop mh);
+   static void       set_vmcount(oop mh, int count);
+ 
+   // Testers
+   static bool is_subclass(klassOop klass) {
+     return SystemDictionary::CountingMethodHandle_klass() != NULL &&
+       Klass::cast(klass)->is_subclass_of(SystemDictionary::CountingMethodHandle_klass());
+   }
+   static bool is_instance(oop obj) {
+     return obj != NULL && is_subclass(obj->klass());
+   }
+ 
+   // Accessors for code generation:
+   static int vmcount_offset_in_bytes()          { return _vmcount_offset; }
+ };
+ 
+ 
+ 
  // Interface to java.lang.invoke.MemberName objects
  // (These are a private interface for Java code to query the class hierarchy.)
  
  class java_lang_invoke_MemberName: AllStatic {
    friend class JavaClasses;