src/share/vm/logging/logOutput.hpp

*** 81,90 ****
--- 81,92 ----
    // Log outputs with rotation capabilities should override this.
    virtual void force_rotate() {
      // Do nothing by default.
    }
  
+   virtual void describe(outputStream *out, size_t index);
+ 
    virtual const char* name() const = 0;
    virtual bool initialize(const char* options, outputStream* errstream) = 0;
    virtual int write(const LogDecorations& decorations, const char* msg) = 0;
    virtual int write(LogMessageBuffer::Iterator msg_iterator) = 0;
  };