--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/test/hotspot/jtreg/runtime/cds/appcds/customLoader/test-classes/HelloUnload.java	Mon Jul 29 10:34:20 2019 -0400
@@ -0,0 +1,106 @@
+/*
+ * 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.
+ *
+ */
+
+import java.io.File;
+import java.net.URL;
+import java.net.URLClassLoader;
+import sun.hotspot.WhiteBox;
+
+public class HelloUnload {
+    private static String className = "CustomLoadee";
+
+    public static void main(String args[]) throws Exception {
+        if (args.length != 3) {
+            throw new RuntimeException("Unexpected number of arguments: expected 3, actual " + args.length);
+        }
+
+        String path = args[0];
+        URL url = new File(path).toURI().toURL();
+        URL[] urls = new URL[] {url};
+        System.out.println(path);
+        System.out.println(url);
+
+        // unload the custom class loader
+        boolean doUnload = false;
+        if (args[1].equals("true")) {
+            doUnload = true;
+        } else if (args[1].equals("false")) {
+            doUnload = false;
+        } else {
+            throw new RuntimeException("args[1] can only be either \"true\" or \"false\", actual " + args[1]);
+        }
+
+        // should the CustomLoadee class be in the shared archive
+        boolean inArchive = false;
+        if (args[2].equals("true")) {
+            inArchive = true;
+        } else if (args[2].equals("false")) {
+            inArchive = false;
+        } else {
+            throw new RuntimeException("args[2] can only be either \"true\" or \"false\", actual " + args[1]);
+        }
+
+        URLClassLoader urlClassLoader =
+            new URLClassLoader("HelloClassLoader", urls, null);
+        Class c = Class.forName(className, true, urlClassLoader);
+        System.out.println(c);
+        System.out.println(c.getClassLoader());
+        Object o = c.newInstance();
+
+        // [1] Check that CustomLoadee is defined by the correct loader
+        if (c.getClassLoader() != urlClassLoader) {
+            throw new RuntimeException("c.getClassLoader() == " + c.getClassLoader() +
+                                       ", expected == " + urlClassLoader);
+        }
+
+        // [2] Check that CustomLoadee is loaded from shared archive.
+        WhiteBox wb = WhiteBox.getWhiteBox();
+        if(wb.isSharedClass(HelloUnload.class)) {
+            if (inArchive && !wb.isSharedClass(c)) {
+                throw new RuntimeException("wb.isSharedClass(c) should be true");
+            }
+        }
+
+        ClassUnloadCommon.failIf(!wb.isClassAlive(className), "should be live here");
+
+        if (doUnload) {
+            String loaderName = urlClassLoader.getName();
+            int loadedRefcount = wb.getSymbolRefcount(loaderName);
+            System.out.println("Refcount of symbol " + loaderName + " is " + loadedRefcount);
+
+            urlClassLoader = null; c = null; o = null;
+            ClassUnloadCommon.triggerUnloading();
+            System.out.println("Is CustomLoadee alive? " + wb.isClassAlive(className));
+            ClassUnloadCommon.failIf(wb.isClassAlive(className), "should have been unloaded");
+
+            int unloadedRefcount = wb.getSymbolRefcount(loaderName);
+            System.out.println("Refcount of symbol " + loaderName + " is " + unloadedRefcount);
+
+            // refcount of a permanent symbol will not be decremented
+            if (loadedRefcount != 65535) {
+                ClassUnloadCommon.failIf(unloadedRefcount != (loadedRefcount - 1), "Refcount must be decremented");
+            }
+        }
+    }
+}