diff -r 9c84227836d4 -r 101c2b6eacbe src/hotspot/os/windows/os_windows.cpp
--- a/src/hotspot/os/windows/os_windows.cpp	Fri Oct 12 10:58:06 2018 +0200
+++ b/src/hotspot/os/windows/os_windows.cpp	Tue Oct 09 16:08:07 2018 +0530
@@ -5254,7 +5254,7 @@
 
 // Run the specified command in a separate process. Return its exit value,
 // or -1 on failure (e.g. can't create a new process).
-int os::fork_and_exec(char* cmd) {
+int os::fork_and_exec(char* cmd, bool use_vfork_if_available) {
   STARTUPINFO si;
   PROCESS_INFORMATION pi;
   DWORD exit_code;