A DESCRIPTION OF THE REQUEST :
When UseGCLogFileRotation is enabled, VM warning does not report the real path of GC log.

ostream.cpp:

  // gc log file rotation
  if (UseGCLogFileRotation && NumberOfGCLogFiles > 1) {
    char tempbuf[JVM_MAXPATHLEN];
    jio_snprintf(tempbuf, sizeof(tempbuf), "%s.%d" CURRENTAPPX, _file_name, _cur_file_num);
    _file = fopen(tempbuf, "w"); // This is the real path to open.
  } else {
    _file = fopen(_file_name, "w");
  }
  if (_file != NULL) {
    _need_close = true;
    dump_loggc_header();
  } else {
    warning("Cannot open file %s due to %s\n", _file_name, strerror(errno)); // This filename is not real path, when UseGCLogFileRotation is enabled.
    _need_close = false;
  }

JUSTIFICATION :
I started the JVM on Windows Server 2012 R2, I rarely see the below warning log.

Java HotSpot(TM) 64-Bit Server VM warning: Cannot open file C:\<Path To Log>\gc_pid7396_2015-03-23_17-39-17.log due to No such file or directory

But the <Path To Log> is exists, write access is allowed, and there is enough space available.

I want to see the real path to open the GC log.