src/java.base/share/classes/sun/nio/ch/NativeThreadSet.java

*** 41,11 ***
      /**
       * Adds the current native thread to this set, returning its index so that
       * it can efficiently be removed later.
       */
      int add() {
!         long th = NativeThread.currentNativeThread();
          // 0 and -1 are treated as placeholders, not real thread handles
          if (th == 0)
              th = -1;
          synchronized (this) {
              int start = 0;
--- 41,11 ---
      /**
       * Adds the current native thread to this set, returning its index so that
       * it can efficiently be removed later.
       */
      int add() {
!         long th = NativeThread.current();
          // 0 and -1 are treated as placeholders, not real thread handles
          if (th == 0)
              th = -1;
          synchronized (this) {
              int start = 0;

*** 73,11 ***
      /**
       * Removes the thread at the give index.
       */
      void remove(int i) {
          synchronized (this) {
!             assert (elts[i] == NativeThread.currentNativeThread()) || (elts[i] == -1);
              elts[i] = 0;
              used--;
              if (used == 0 && waitingToEmpty)
                  notifyAll();
          }
--- 73,11 ---
      /**
       * Removes the thread at the give index.
       */
      void remove(int i) {
          synchronized (this) {
!             assert (elts[i] == NativeThread.current()) || (elts[i] == -1);
              elts[i] = 0;
              used--;
              if (used == 0 && waitingToEmpty)
                  notifyAll();
          }