--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/hotspot/test/serviceability/dcmd/gc/ClassHistogramTest.java	Fri Jan 30 20:00:57 2015 +0100
@@ -0,0 +1,89 @@
+/*
+ * Copyright (c) 2015, 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.
+ */
+
+import org.testng.annotations.Test;
+
+import java.util.regex.Pattern;
+
+import com.oracle.java.testlibrary.OutputAnalyzer;
+import com.oracle.java.testlibrary.dcmd.CommandExecutor;
+import com.oracle.java.testlibrary.dcmd.JMXExecutor;
+
+/*
+ * @test
+ * @summary Test of diagnostic command GC.class_histogram
+ * @library /testlibrary
+ * @build com.oracle.java.testlibrary.*
+ * @build com.oracle.java.testlibrary.dcmd.*
+ * @run testng ClassHistogramTest
+ */
+public class ClassHistogramTest {
+    public static class TestClass {}
+    public static TestClass[] instances = new TestClass[1024];
+    protected String classHistogramArgs = "";
+
+    static {
+        for (int i = 0; i < instances.length; ++i) {
+            instances[i] = new TestClass();
+        }
+    }
+
+    public void run(CommandExecutor executor) {
+        OutputAnalyzer output = executor.execute("GC.class_histogram " + classHistogramArgs);
+
+        /*
+         * example output:
+         *   num     #instances         #bytes  class name
+         *  ----------------------------------------------
+         *     1:          1647        1133752  [B
+         *     2:          6198         383168  [C
+         *     3:          1464         165744  java.lang.Class
+         *     4:          6151         147624  java.lang.String
+         *     5:          2304          73728  java.util.concurrent.ConcurrentHashMap$Node
+         *     6:          1199          64280  [Ljava.lang.Object;
+         * ...
+         */
+
+        /* Require at least one java.lang.Class */
+        output.shouldMatch("^\\s+\\d+:\\s+\\d+\\s+\\d+\\s+java.lang.Class\\s*$");
+
+        /* Require at least one java.lang.String */
+        output.shouldMatch("^\\s+\\d+:\\s+\\d+\\s+\\d+\\s+java.lang.String\\s*$");
+
+        /* Require at least one java.lang.Object */
+        output.shouldMatch("^\\s+\\d+:\\s+\\d+\\s+\\d+\\s+java.lang.Object\\s*$");
+
+        /* Require at exactly one TestClass[] */
+        output.shouldMatch("^\\s+\\d+:\\s+1\\s+\\d+\\s+" +
+                Pattern.quote(TestClass[].class.getName()) + "\\s*$");
+
+        /* Require at exactly 1024 TestClass */
+        output.shouldMatch("^\\s+\\d+:\\s+1024\\s+\\d+\\s+" +
+                Pattern.quote(TestClass.class.getName()) + "\\s*$");
+    }
+
+    @Test
+    public void jmx() {
+        run(new JMXExecutor());
+    }
+}