src/java.base/share/classes/jdk/internal/access/JavaLangAccess.java

@@ -500,10 +500,22 @@
       * Returns the Thread object for the current platform thread. If the
       * current thread is a virtual thread then this method returns the carrier.
       */
      Thread currentCarrierThread();
  
+     /**
+      * Returns the given virtual thread's carrier or {@code null} if not mounted.
+      * @throws UnsupportedOperationException if the thread is not a virtual thread
+      */
+     Thread getCarrierThread(Thread thread);
+ 
+     /**
+      * Returns the given virtual thread's internal state.
+      * @throws UnsupportedOperationException if the thread is not a virtual thread
+      */
+     int getInternalState(Thread thread);
+ 
      /**
       * Returns the value of the current carrier thread's copy of a thread-local.
       */
      <T> T getCarrierThreadLocal(CarrierThreadLocal<T> local);