--- a/test/lib/sun/hotspot/WhiteBox.java	Sat Nov 11 01:21:09 2017 +0100
+++ b/test/lib/sun/hotspot/WhiteBox.java	Thu Aug 31 10:00:28 2017 +0200
@@ -531,6 +531,9 @@
   public native int addCompilerDirective(String compDirect);
   public native void removeCompilerDirective(int count);
 
+  // Handshakes
+  public native int handshakeWalkStack(Thread t, boolean all_threads);
+
   // Returns true on linux if library has the noexecstack flag set.
   public native boolean checkLibSpecifiesNoexecstack(String libfilename);
 }