--- /dev/null	2017-07-07 09:32:03.000000000 -0700
+++ new/src/jdk.internal.vm.compiler/share/classes/org.graalvm.compiler.debug/src/org/graalvm/compiler/debug/CounterKeyImpl.java	2017-07-07 09:32:03.000000000 -0700
@@ -0,0 +1,65 @@
+/*
+ * Copyright (c) 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 org.graalvm.compiler.debug;
+
+import org.graalvm.util.Pair;
+
+class CounterKeyImpl extends AbstractKey implements CounterKey {
+
+    CounterKeyImpl(String format, Object arg1, Object arg2) {
+        super(format, arg1, arg2);
+    }
+
+    @Override
+    public void increment(DebugContext debug) {
+        add(debug, 1);
+    }
+
+    @Override
+    public Pair<String, String> toCSVFormat(long value) {
+        return Pair.create(String.valueOf(value), "");
+    }
+
+    @Override
+    public String toHumanReadableFormat(long value) {
+        return Long.toString(value);
+    }
+
+    @Override
+    public void add(DebugContext debug, long value) {
+        if (debug.isCounterEnabled(this)) {
+            addToCurrentValue(debug, value);
+        }
+    }
+
+    @Override
+    public boolean isEnabled(DebugContext debug) {
+        return debug.isCounterEnabled(this);
+    }
+
+    @Override
+    public CounterKey doc(String doc) {
+        setDoc(doc);
+        return this;
+    }
+}