96 lines
3.8 KiB
Java
96 lines
3.8 KiB
Java
/*
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* Copyright (c) 2018, 2022, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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/*
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* @test UnloadInterfaceTest
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* @requires vm.opt.final.ClassUnloading
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* @modules java.base/jdk.internal.misc
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* @library /test/lib
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* @compile test/Interface.java
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* @compile test/ImplementorClass.java
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* @build jdk.test.whitebox.WhiteBox
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* @run driver jdk.test.lib.helpers.ClassFileInstaller jdk.test.whitebox.WhiteBox
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* @run main/othervm -Xbootclasspath/a:. -Xmn8m -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI -Xlog:class+unload=trace UnloadInterfaceTest
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*/
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import jdk.test.whitebox.WhiteBox;
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import test.Interface;
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import java.lang.ClassLoader;
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import jdk.test.lib.classloader.ClassUnloadCommon;
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/**
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* Test that verifies that class unloaded removes the implementor from its the interface that it implements
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* via logging.
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* [1.364s][info][class,unload] unloading class test.ImplementorClass 0x00000008000a2840
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* [1.366s][trace][class,unload] unlinking class (subclass): test.ImplementorClass
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* [1.366s][trace][class,unload] unlinking class (implementor): test.ImplementorClass
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*/
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public class UnloadInterfaceTest {
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private static String className = "test.ImplementorClass";
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private static String interfaceName = "test.Interface";
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static class LoaderToUnload extends ClassLoader {
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ClassLoader myParent;
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public Class loadClass(String name) throws ClassNotFoundException {
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if (name.contains(className)) {
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System.out.println("className found " + className);
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byte[] data = ClassUnloadCommon.getClassData(name);
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return defineClass(name, data, 0, data.length);
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} else {
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return myParent.loadClass(name);
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}
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}
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public LoaderToUnload(ClassLoader parent) {
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super();
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myParent = parent;
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}
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}
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public static void main(String... args) throws Exception {
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run();
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}
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private static void run() throws Exception {
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final WhiteBox wb = WhiteBox.getWhiteBox();
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ClassUnloadCommon.failIf(wb.isClassAlive(className), "is not expected to be alive yet");
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// Load interface Class with one class loader.
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ClassLoader icl = ClassUnloadCommon.newClassLoader();
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Class<?> ic = icl.loadClass(interfaceName);
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ClassLoader cl = new LoaderToUnload(icl);
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Class<?> c = cl.loadClass(className);
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Object o = c.newInstance();
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ClassUnloadCommon.failIf(!wb.isClassAlive(className), "should be live here");
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ClassUnloadCommon.failIf(!wb.isClassAlive(interfaceName), "should be live here");
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cl = null; c = null; o = null;
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ClassUnloadCommon.triggerUnloading();
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ClassUnloadCommon.failIf(wb.isClassAlive(className), "should have been unloaded");
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ClassUnloadCommon.failIf(!wb.isClassAlive(interfaceName), "should be live here");
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System.out.println("We still have Interface referenced" + ic);
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}
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}
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