1 /* 2 * Copyright (c) 2016, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 */ 23 24 import java.beans.BeanInfo; 25 import java.beans.Introspector; 26 import java.beans.MethodDescriptor; 27 import java.io.File; 28 import java.net.URL; 29 import java.net.URLClassLoader; 30 import java.nio.file.Files; 31 import java.nio.file.Path; 32 import java.nio.file.Paths; 33 import java.nio.file.StandardCopyOption; 34 import java.util.Arrays; 35 36 /** 37 * @test 38 * @bug 8159696 39 * @library /javax/swing/regtesthelpers 40 * @compile ./stub/Stub.java 41 * @run main/othervm -mx32M UnloadClassBeanInfo 42 */ 43 public class UnloadClassBeanInfo { 44 45 private static URLClassLoader loader; 46 47 public static void main(final String[] args) throws Exception { 48 Class cl = getStub(); 49 System.out.println("cl.getClassLoader() = " + cl.getClassLoader()); 50 final BeanInfo beanInfo = Introspector.getBeanInfo(cl, Object.class); 51 MethodDescriptor[] mds = beanInfo.getMethodDescriptors(); 52 System.out.println("mds = " + Arrays.toString(mds)); 53 loader.close(); 54 loader=null; 55 cl=null; 56 Util.generateOOME(); 57 mds = beanInfo.getMethodDescriptors(); 58 System.out.println("mds = " + Arrays.toString(mds)); 59 } 60 61 /** 62 * The Stub class is compiled by jtreg, but we want to move it so it is not 63 * on the application classpath. We want to load it through a separate 64 * classloader. 65 */ 66 static Class<?> getStub() throws Exception { 67 final String testclasses = System.getProperty("test.classes"); 68 final File subdir = new File(testclasses, "stub"); 69 subdir.mkdir(); 70 71 final Path src = Paths.get(testclasses, "Stub.class"); 72 final Path dest = subdir.toPath().resolve("Stub.class"); 73 Files.move(src, dest, StandardCopyOption.REPLACE_EXISTING); 74 75 loader = new URLClassLoader(new URL[]{subdir.toURL()}); 76 return Class.forName("Stub", true, loader); 77 } 78 }