--- a/src/java.base/share/classes/java/lang/System.java	Thu Jan 31 09:01:10 2019 +0000
+++ b/src/java.base/share/classes/java/lang/System.java	Tue Feb 05 18:53:19 2019 +0000
@@ -2172,6 +2172,12 @@
             public void blockedOn(Interruptible b) {
                 Thread.blockedOn(b);
             }
+            public void setNativeTid(long tid) {
+                Thread.setNativeTid(tid);
+            }
+            public long nativeTid() {
+                return Thread.nativeTid();
+            }
             public void registerShutdownHook(int slot, boolean registerShutdownInProgress, Runnable hook) {
                 Shutdown.add(slot, registerShutdownInProgress, hook);
             }