diff -r 15e026239a6c -r fcdb8e7ead8f src/jdk.hotspot.agent/share/classes/sun/jvm/hotspot/gc/cms/ConcurrentMarkSweepGeneration.java
--- a/src/jdk.hotspot.agent/share/classes/sun/jvm/hotspot/gc/cms/ConcurrentMarkSweepGeneration.java	Fri Nov 08 14:54:17 2019 +0000
+++ /dev/null	Thu Jan 01 00:00:00 1970 +0000
@@ -1,85 +0,0 @@
-/*
- * Copyright (c) 2003, 2019, 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.gc.cms;
-
-import java.io.*;
-import java.util.*;
-import sun.jvm.hotspot.debugger.*;
-import sun.jvm.hotspot.gc.shared.*;
-import sun.jvm.hotspot.runtime.*;
-import sun.jvm.hotspot.types.*;
-
-public class ConcurrentMarkSweepGeneration extends CardGeneration {
-  private static AddressField cmsSpaceField;
-
-  public ConcurrentMarkSweepGeneration(Address addr) {
-    super(addr);
-  }
-
-  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("ConcurrentMarkSweepGeneration");
-    cmsSpaceField = type.getAddressField("_cmsSpace");
-  }
-
-  // Accessing space
-  public CompactibleFreeListSpace cmsSpace() {
-    return (CompactibleFreeListSpace) VMObjectFactory.newObject(
-                                 CompactibleFreeListSpace.class,
-                                 cmsSpaceField.getValue(addr));
-  }
-
-  public long capacity()                { return cmsSpace().capacity(); }
-  public long used()                    { return cmsSpace().used(); }
-  public long free()                    { return cmsSpace().free(); }
-  public long contiguousAvailable()     { throw new RuntimeException("not yet implemented"); }
-  public boolean contains(Address p)    { return cmsSpace().contains(p); }
-  public void spaceIterate(SpaceClosure blk, boolean usedOnly) {
-     blk.doSpace(cmsSpace());
-  }
-  public void liveRegionsIterate(LiveRegionsClosure closure) {
-      closure.doLiveRegions(cmsSpace());
-  }
-
-  public Generation.Name kind() {
-    return Generation.Name.CONCURRENT_MARK_SWEEP;
-  }
-
-  public String name() {
-    return "concurrent mark-sweep generation";
-  }
-
-  public void printOn(PrintStream tty) {
-    tty.println(name());
-    cmsSpace().printOn(tty);
-  }
-}