--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/truffle/com.oracle.truffle.object/src/com/oracle/truffle/object/DebugCounter.java	Mon Aug 17 10:44:54 2015 +0200
@@ -0,0 +1,67 @@
+/*
+ * Copyright (c) 2014, 2014, 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 com.oracle.truffle.object;
+
+import java.io.*;
+import java.util.*;
+import java.util.concurrent.atomic.*;
+
+public final class DebugCounter {
+    private static final ArrayList<DebugCounter> allCounters = new ArrayList<>();
+
+    private final String name;
+    private final AtomicLong value;
+
+    private DebugCounter(String name) {
+        this.name = name;
+        this.value = new AtomicLong();
+        allCounters.add(this);
+    }
+
+    public static DebugCounter create(String name) {
+        return new DebugCounter(name);
+    }
+
+    public long get() {
+        return value.get();
+    }
+
+    public void inc() {
+        value.incrementAndGet();
+    }
+
+    @Override
+    public String toString() {
+        return name + ": " + value;
+    }
+
+    public static void dumpCounters() {
+        dumpCounters(System.out);
+    }
+
+    public static void dumpCounters(PrintStream out) {
+        for (DebugCounter counter : allCounters) {
+            out.println(counter);
+        }
+    }
+}