--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test/hotspot/jtreg/runtime/appcds/cdsutils/DynamicDumpHelper.java	Fri May 17 08:29:55 2019 -0700
@@ -0,0 +1,61 @@
+/*
+ * Copyright (c) 2019, 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 cdsutils;
+
+import java.io.BufferedReader;
+import java.io.File;
+import java.io.FileReader;
+
+/**
+ * This class is used to simulate -Xshare:dump with -XX:ArchiveClassesAtExit.
+ * It loads all classes specified in a classlist file. See patchJarForDynamicDump()
+ * in ../TestCommon.java for details.
+ */
+public class DynamicDumpHelper {
+    public static void main(String args[]) throws Throwable {
+        File file = new File(args[0]);
+
+        System.out.println("Loading classes to share...");
+        try (BufferedReader br = new BufferedReader(new FileReader(file))) {
+            String line;
+            while ((line = br.readLine()) != null) {
+                //System.out.println("Loading class: " + line);
+                line = line.replace('/', '.');
+                try {
+                    Class.forName(line);
+                } catch (java.lang.ClassNotFoundException ex) {
+                    try {
+                        Class.forName(line, true, null);
+                    } catch (java.lang.ClassNotFoundException cnfe) {
+                        System.out.println("Preload Warning: Cannot find " + line.replace('.', '/'));
+                    }
+                } catch (Throwable t) {
+                    System.out.println("Error: failed to load \"" + line + "\": " + t);
+                }
+            }
+        }
+        System.out.println("Loading classes to share: done.");
+    }
+}