--- a/src/share/vm/utilities/ostream.hpp	Wed Oct 16 10:52:41 2013 +0200
+++ b/src/share/vm/utilities/ostream.hpp	Tue Nov 05 17:38:04 2013 -0800
@@ -231,20 +231,24 @@
   void flush() {};
 };
 
-class rotatingFileStream : public fileStream {
+class gcLogFileStream : public fileStream {
  protected:
-  char*  _file_name;
+  const char*  _file_name;
   jlong  _bytes_written;
-  uintx  _cur_file_num;             // current logfile rotation number, from 0 to MaxGCLogFileNumbers-1
+  uintx  _cur_file_num;             // current logfile rotation number, from 0 to NumberOfGCLogFiles-1
  public:
-  rotatingFileStream(const char* file_name);
-  rotatingFileStream(const char* file_name, const char* opentype);
-  rotatingFileStream(FILE* file) : fileStream(file) {}
-  ~rotatingFileStream();
+  gcLogFileStream(const char* file_name);
+  ~gcLogFileStream();
   virtual void write(const char* c, size_t len);
   virtual void rotate_log();
+  void dump_loggc_header();
 };
 
+#ifndef PRODUCT
+// unit test for checking -Xloggc:<filename> parsing result
+void test_loggc_filename();
+#endif
+
 void ostream_init();
 void ostream_init_log();
 void ostream_exit();