--- old/src/jdk.hotspot.agent/share/classes/sun/jvm/hotspot/memory/PlaceholderEntry.java	2017-07-17 11:20:06.962414769 -0400
+++ /dev/null	2017-06-11 15:38:07.778000227 -0400
@@ -1,75 +0,0 @@
-/*
- * Copyright (c) 2003, 2012, 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.
- *
- * This code is distributed in the hope that it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
- * version 2 for more details (a copy is included in the LICENSE file that
- * accompanied this code).
- *
- * You should have received a copy of the GNU General Public License version
- * 2 along with this work; if not, write to the Free Software Foundation,
- * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
- *
- * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
- * or visit www.oracle.com if you need additional information or have any
- * questions.
- *
- */
-
-package sun.jvm.hotspot.memory;
-
-import java.util.*;
-import sun.jvm.hotspot.classfile.ClassLoaderData;
-import sun.jvm.hotspot.debugger.*;
-import sun.jvm.hotspot.oops.*;
-import sun.jvm.hotspot.types.*;
-import sun.jvm.hotspot.runtime.*;
-import sun.jvm.hotspot.utilities.*;
-
-public class PlaceholderEntry extends sun.jvm.hotspot.utilities.HashtableEntry {
-  static {
-    VM.registerVMInitializedObserver(new Observer() {
-        public void update(Observable o, Object data) {
-          initialize(VM.getVM().getTypeDataBase());
-        }
-      });
-  }
-
-  private static synchronized void initialize(TypeDataBase db) {
-    Type type = db.lookupType("PlaceholderEntry");
-    loaderDataField = type.getAddressField("_loader_data");
-  }
-
-  // Field
-  private static AddressField loaderDataField;
-
-  // Accessor
-  public Oop loader() {
-    return loaderData().getClassLoader();
-  }
-
-  public ClassLoaderData loaderData() {
-    return ClassLoaderData.instantiateWrapperFor(loaderDataField.getValue(addr));
-  }
-
-  public PlaceholderEntry(Address addr) {
-    super(addr);
-  }
-
-  public Symbol klass() {
-    return Symbol.create(literalValue());
-  }
-
-  /* covariant return type :-(
-  public PlaceholderEntry next() {
-    return (PlaceholderEntry) super.next();
-  }
-  For now, let the caller cast it ..
-  */
-}