--- /dev/null 2019-10-31 12:50:31.827000000 -0700 +++ new/test/hotspot/jtreg/runtime/cds/appcds/dynamicArchive/test-classes/LinkClassApp.java 2020-02-26 18:40:12.256194780 -0800 @@ -0,0 +1,52 @@ +/* + * Copyright (c) 2020, 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. + */ + +class Parent { + int get() {return 1;} +} + +class Child extends Parent { + int get() {return 2;} +} + +class LinkClassApp { + public static void main(String args[]) { + if (args.length > 0 && args[0].equals("run")) { + System.out.println("test() = " + test()); + } else { + // Executed during dynamic dumping. + System.out.println("Test.class is initialized."); + System.out.println("Parent.class and Child.class are loaded when Test.class is verified,"); + System.out.println("but these two classes are not linked"); + } + } + + static int test() { + // Verification of Test.test() would load Child and Parent, and create a verification constraint that + // Child must be a subtype of Parent. + // + // Child and Parent are not linked until Test.test() is actually executed. + Parent x = new Child(); + return x.get(); + } +}