--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/jdk.hotspot.agent/share/classes/sun/jvm/hotspot/runtime/vmSymbols.java	Tue Sep 12 19:03:39 2017 +0200
@@ -0,0 +1,61 @@
+/*
+ * Copyright (c) 2011, 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.runtime;
+
+import java.io.*;
+import java.util.*;
+import sun.jvm.hotspot.debugger.*;
+import sun.jvm.hotspot.memory.*;
+import sun.jvm.hotspot.oops.*;
+import sun.jvm.hotspot.runtime.*;
+import sun.jvm.hotspot.types.*;
+import sun.jvm.hotspot.utilities.*;
+
+
+public class vmSymbols {
+  static {
+    VM.registerVMInitializedObserver(new Observer() {
+        public void update(Observable o, Object data) {
+          initialize(VM.getVM().getTypeDataBase());
+        }
+      });
+  }
+
+  private static Address symbolsAddress;
+  private static int FIRST_SID;
+  private static int SID_LIMIT;
+
+  private static synchronized void initialize(TypeDataBase db) throws WrongTypeException {
+    Type type            = db.lookupType("vmSymbols");
+    symbolsAddress       = type.getAddressField("_symbols[0]").getStaticFieldAddress();
+    FIRST_SID            = db.lookupIntConstant("vmSymbols::FIRST_SID");
+    SID_LIMIT            = db.lookupIntConstant("vmSymbols::SID_LIMIT");
+  }
+
+  public static Symbol symbolAt(int id) {
+    if (id < FIRST_SID || id >= SID_LIMIT) throw new IndexOutOfBoundsException("bad SID " + id);
+    return Symbol.create(symbolsAddress.getAddressAt(id * VM.getVM().getAddressSize()));
+  }
+}