--- /dev/null	2018-05-02 09:10:36.097102948 -0700
+++ new/test/hotspot/jtreg/vmTestbase/nsk/sysdict/share/ChainGen.java	2018-05-11 14:03:50.797561397 -0700
@@ -0,0 +1,141 @@
+/*
+ * Copyright (c) 2002, 2018, 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 nsk.sysdict.share;
+
+import java.io.*;
+
+/**
+ * This tools generates a chain of classes.
+ * For more details, use:
+ * <pre>
+ *     java ChainGen -help
+ * </pre>
+ */
+public class ChainGen {
+    private static final int FATS_HEIGHT = 5;
+    private static final int FATS_WEIGHT = 10000;
+    private static final int LEANS_HEIGHT = 50;
+    private static final int LEANS_WEIGHT = 1;
+
+    private static void explain(Object x) {
+        System.err.println("# " + x);
+    }
+
+    public static void main(String args[]) {
+        if (args.length < 1 || args[0].toLowerCase().startsWith("-h")) {
+            explain("Generates a chain classes extending each other.");
+            explain("");
+            explain("Use:");
+            explain("    java ChainGen $NAME $HEIGHT $WEIGHT");
+            explain("Or:");
+            explain("    java ChainGen \"fats\"");
+            explain("Or:");
+            explain("    java ChainGen \"leans\"");
+            explain("");
+            explain("This creates:");
+            explain("    ${NAME}Info.java class displaying HEIGHT and WEIGHT.");
+            explain("    ${NAME}XXXXXX.java defining classes chain.");
+            explain("");
+            explain("Here:");
+            explain("    HEIGHT and WEIGHT must be positive integers.");
+            explain("    Defaults for \"fats\": HEIGHT is " + FATS_HEIGHT
+                + ", WEIGHT is " + FATS_WEIGHT +".");
+            explain("    Defaults for \"leans\": HEIGHT is " + LEANS_HEIGHT
+                + ", WEIGHT is " + LEANS_WEIGHT +".");
+            System.exit(1);
+        };
+        String name;
+        int height, weight;
+        if (args[0].toLowerCase().equals("fats")) {
+            name   = "Fats";
+            height = FATS_HEIGHT;
+            weight = FATS_WEIGHT;
+        } else if (args[0].toLowerCase().equals("leans")) {
+            name   = "Leans";
+            height = LEANS_HEIGHT;
+            weight = LEANS_WEIGHT;
+        } else {
+            name   = args[0];
+            height = Integer.parseInt(args[1]);
+            weight = Integer.parseInt(args[2]);
+        };
+        try {
+            doit(name, height, weight);
+        } catch (IOException exception) {
+            exception.printStackTrace(System.err);
+            System.exit(1);
+        }
+    }
+
+    private static void doit(String name, int height, int weight)
+        throws FileNotFoundException
+    {
+        // Constants definition:
+        PrintStream info = new PrintStream(
+                new FileOutputStream(new File(name + "Info.java"))
+            );
+        info.println("// This file is generated by: ChainGen.java");
+        info.println("package nsk.sysdict.share;");
+        info.println("public class " + name + "Info {");
+        info.println("    public static final int HEIGHT = " + height + ";");
+        info.println("    private static final int WEIGHT = " + weight + ";");
+        info.println("    public static final String rootName = \"" + name + "\";");
+        info.println("    public static final String[] nodeNames = new String[] {");
+        // Generate a series of fat classes:
+        for (int index=0; index<height; index++) {
+            String suffix = digits(index,6);
+            String className = name + suffix;
+            info.println("        \"" + suffix + "\""
+                + (index+1<height? "," : ""));
+            PrintStream chain = new PrintStream(
+                new FileOutputStream(new File(className + ".java"))
+            );
+            chain.println("// This file is generated by: ChainGen.java");
+            chain.println("package nsk.sysdict.share;");
+            chain.println("class " + className
+                + (index>0? " extends " + name + digits(index-1,6): "")
+                + " {");
+            for (int w=0; w<weight; w++) {
+                String fieldName = "fill_" + className + "_" + digits(w,6);
+                chain.println("    static long " + fieldName + ";");
+            }
+            chain.println("}");
+            chain.close();
+        };
+        //
+        info.println("    };");
+        info.println("}");
+        info.close();
+    }
+
+    /**
+     * Convert <tt>x</tt> to <tt>n</tt>-digits string.
+     */
+    private static String digits(int x, int n) {
+        String s = "" + x;
+        while (s.length() < n)
+            s = "0" + s;
+        return s;
+    }
+}