--- a/src/java.base/share/classes/jdk/internal/access/JavaLangAccess.java	Thu Jan 31 09:01:10 2019 +0000
+++ b/src/java.base/share/classes/jdk/internal/access/JavaLangAccess.java	Tue Feb 05 18:53:19 2019 +0000
@@ -107,6 +107,16 @@
     void blockedOn(Interruptible b);
 
     /**
+     * Set the current thread's native ID
+     */
+    void setNativeTid(long tid);
+
+    /**
+     * Returns the current thread's native ID
+     */
+    long nativeTid();
+
+    /**
      * Registers a shutdown hook.
      *
      * It is expected that this method with registerShutdownInProgress=true