diff -r b87dc103bf45 -r 2be326848943 src/share/vm/runtime/os.hpp
--- a/src/share/vm/runtime/os.hpp	Sat Nov 09 20:15:27 2019 +0800
+++ b/src/share/vm/runtime/os.hpp	Sat Nov 09 20:29:45 2019 +0800
@@ -567,8 +567,7 @@
 
   // Reading directories.
   static DIR*           opendir(const char* dirname);
-  static int            readdir_buf_size(const char *path);
-  static struct dirent* readdir(DIR* dirp, dirent* dbuf);
+  static struct dirent* readdir(DIR* dirp);
   static int            closedir(DIR* dirp);
 
   // Dynamic library extension