diff -r 8e814475a28a -r a7488329ad27 hotspot/src/os/windows/vm/os_windows.cpp
--- a/hotspot/src/os/windows/vm/os_windows.cpp	Tue May 10 03:37:36 2016 +0000
+++ b/hotspot/src/os/windows/vm/os_windows.cpp	Mon May 09 15:46:12 2016 +0200
@@ -4661,6 +4661,14 @@
   }
 }
 
+void os::flockfile(FILE* fp) {
+  _lock_file(fp);
+}
+
+void os::funlockfile(FILE* fp) {
+  _unlock_file(fp);
+}
+
 // This code is a copy of JDK's nonSeekAvailable
 // from src/windows/hpi/src/sys_api_md.c