--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/jdk.hotspot.agent/share/classes/sun/jvm/hotspot/oops/Array.java	Tue Sep 12 19:03:39 2017 +0200
@@ -0,0 +1,117 @@
+/*
+ * Copyright (c) 2000, 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.oops;
+
+import java.util.*;
+import sun.jvm.hotspot.debugger.*;
+import sun.jvm.hotspot.memory.*;
+import sun.jvm.hotspot.runtime.*;
+import sun.jvm.hotspot.types.*;
+
+// Array is an abstract superclass for TypeArray and ObjArray
+
+public class Array extends Oop {
+  static {
+    VM.registerVMInitializedObserver(new Observer() {
+        public void update(Observable o, Object data) {
+          initialize(VM.getVM().getTypeDataBase());
+        }
+      });
+  }
+
+  Array(OopHandle handle, ObjectHeap heap) {
+    super(handle, heap);
+  }
+
+  private static void initialize(TypeDataBase db) throws WrongTypeException {
+    Type type   = db.lookupType("arrayOopDesc");
+    typeSize    = (int)type.getSize();
+  }
+
+  // Size of the arrayOopDesc
+  private static long headerSize=0;
+  private static long lengthOffsetInBytes=0;
+  private static long typeSize;
+
+  private static long headerSizeInBytes() {
+    if (headerSize != 0) {
+      return headerSize;
+    }
+    if (VM.getVM().isCompressedKlassPointersEnabled()) {
+      headerSize = typeSize;
+    } else {
+      headerSize = VM.getVM().alignUp(typeSize + VM.getVM().getIntSize(),
+                                      VM.getVM().getHeapWordSize());
+    }
+    return headerSize;
+  }
+
+  private static long headerSize(BasicType type) {
+    if (Universe.elementTypeShouldBeAligned(type)) {
+       return alignObjectSize(headerSizeInBytes())/VM.getVM().getHeapWordSize();
+    } else {
+      return headerSizeInBytes()/VM.getVM().getHeapWordSize();
+    }
+  }
+
+  private long lengthOffsetInBytes() {
+    if (lengthOffsetInBytes != 0) {
+      return lengthOffsetInBytes;
+    }
+    if (VM.getVM().isCompressedKlassPointersEnabled()) {
+      lengthOffsetInBytes = typeSize - VM.getVM().getIntSize();
+    } else {
+      lengthOffsetInBytes = typeSize;
+    }
+    return lengthOffsetInBytes;
+  }
+
+  // Accessors for declared fields
+  public long getLength() {
+    boolean isUnsigned = true;
+    return this.getHandle().getCIntegerAt(lengthOffsetInBytes(), VM.getVM().getIntSize(), isUnsigned);
+  }
+
+  public long getObjectSize() {
+    ArrayKlass klass = (ArrayKlass) getKlass();
+    // We have to fetch the length of the array, shift (multiply) it
+    // appropriately, up to wordSize, add the header, and align to
+    // object size.
+    long s = getLength() << klass.getLog2ElementSize();
+    s += klass.getArrayHeaderInBytes();
+    s = Oop.alignObjectSize(s);
+    return s;
+  }
+
+  public static long baseOffsetInBytes(BasicType type) {
+    return headerSize(type) * VM.getVM().getHeapWordSize();
+  }
+
+  public boolean isArray()             { return true; }
+
+  public void iterateFields(OopVisitor visitor, boolean doVMFields) {
+    super.iterateFields(visitor, doVMFields);
+  }
+}