*** old/src/share/vm/runtime/thread.hpp	Tue Oct 28 14:49:24 2014
--- new/src/share/vm/runtime/thread.hpp	Tue Oct 28 14:49:24 2014

*** 1765,1774 ****
--- 1765,1777 ----
    void set_scanned_nmethod(nmethod* nm) {
      assert(_scanned_nmethod == NULL || nm == NULL, "should reset to NULL before writing a new value");
      _scanned_nmethod = nm;
    }
  
+   // Hide sweeper thread from external view.
+   bool is_hidden_from_external_view() const { return true; }
+ 
    bool is_Code_cache_sweeper_thread() const { return true; }
    // GC support
    // Apply "f->do_oop" to all root oops in "this".
    // Apply "cf->do_code_blob" (if !NULL) to all code blobs active in frames
    void oops_do(OopClosure* f, CLDClosure* cld_f, CodeBlobClosure* cf);