src/java.base/share/classes/java/lang/Shutdown.java

Updates after review: remove status argument completely from beforeHalt

8041626: Shutdown tracing event

 /*
- * Copyright (c) 1999, 2005, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1999, 2018, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
  * under the terms of the GNU General Public License version 2 only, as
  * published by the Free Software Foundation.  Oracle designates this

@@ -128,10 +128,13
                 }
             }
         }
     }
 
+    /* Notify the VM that it's time to halt. */
+    static native void beforeHalt();
+
     /* The halt method is synchronized on the halt lock
      * to avoid corruption of the delete-on-shutdown file list.
      * It invokes the true native halt method.
      */
     static void halt(int status) {

@@ -207,10 +210,11
         }
         synchronized (Shutdown.class) {
             /* Synchronize on the class object, causing any other thread
              * that attempts to initiate shutdown to stall indefinitely
              */
+            beforeHalt();
             sequence();
             halt(status);
         }
     }