--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/src/java.management/share/classes/sun/management/counter/perf/PerfLongCounter.java	Tue Sep 12 19:03:39 2017 +0200
@@ -0,0 +1,67 @@
+/*
+ * Copyright (c) 2003, 2004, 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
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * 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.management.counter.perf;
+
+import sun.management.counter.*;
+import java.nio.LongBuffer;
+import java.nio.ReadOnlyBufferException;
+
+public class PerfLongCounter extends AbstractCounter
+       implements LongCounter {
+
+    LongBuffer lb;
+
+    // package private
+    PerfLongCounter(String name, Units u, Variability v, int flags,
+                    LongBuffer lb) {
+        super(name, u, v, flags);
+        this.lb = lb;
+    }
+
+    public Object getValue() {
+        return Long.valueOf(lb.get(0));
+    }
+
+    /**
+     * Get the value of this Long performance counter
+     */
+    public long longValue() {
+        return lb.get(0);
+    }
+
+    /**
+     * Serialize as a snapshot object.
+     */
+    protected Object writeReplace() throws java.io.ObjectStreamException {
+        return new LongCounterSnapshot(getName(),
+                                       getUnits(),
+                                       getVariability(),
+                                       getFlags(),
+                                       longValue());
+    }
+
+    private static final long serialVersionUID = 857711729279242948L;
+}