1 /* 2 * Copyright (c) 2018, 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 /* 25 * @test 26 * @bug 8151486 27 * @summary Call Class.forName() on the system classloader from a class loaded 28 * from a custom classloader, using the current class's protection domain. 29 * @library /test/jdk/lib/testlibrary 30 * @build jdk.testlibrary.Utils JarUtils 31 * @build ClassForName ProtectionDomainCacheTest 32 * @run main/othervm/policy=test.policy -XX:+UnlockDiagnosticVMOptions -XX:VerifySubSet=dictionary -XX:+VerifyAfterGC -Xlog:gc+verify=debug,protectiondomain=trace,class+unload:gc.log -Djava.security.manager ProtectionDomainCacheTest 33 */ 34 35 import java.net.URL; 36 import java.net.URLClassLoader; 37 import java.nio.file.FileSystems; 38 import java.nio.file.Files; 39 import java.nio.file.Path; 40 import java.nio.file.Paths; 41 import java.util.List; 42 import jdk.testlibrary.Utils; 43 44 /* 45 * Create .jar, load ClassForName from .jar using a URLClassLoader 46 */ 47 public class ProtectionDomainCacheTest { 48 private static final long TIMEOUT = (long)(5000.0 * Utils.TIMEOUT_FACTOR); 49 private static final String TESTCLASSES = System.getProperty("test.classes", "."); 50 private static final String CLASSFILENAME = "ClassForName.class"; 51 52 // Use a new classloader to load the ClassForName class. 53 public static void loadAndRun(Path jarFilePath) 54 throws Exception { 55 ClassLoader classLoader = new URLClassLoader( 56 new URL[]{jarFilePath.toUri().toURL()}) { 57 @Override public String toString() { return "LeakedClassLoader"; } 58 }; 59 60 Class<?> loadClass = Class.forName("ClassForName", true, classLoader); 61 loadClass.newInstance(); 62 63 System.out.println("returning : " + classLoader); 64 } 65 66 public static void main(final String[] args) throws Exception { 67 // Create a temporary .jar file containing ClassForName.class 68 Path testClassesDir = Paths.get(TESTCLASSES); 69 Path jarFilePath = Files.createTempFile("cfn", ".jar"); 70 JarUtils.createJarFile(jarFilePath, testClassesDir, CLASSFILENAME); 71 jarFilePath.toFile().deleteOnExit(); 72 73 // Remove the ClassForName.class file that jtreg built, to make sure 74 // we're loading from the tmp .jar 75 Path classFile = FileSystems.getDefault().getPath(TESTCLASSES, 76 CLASSFILENAME); 77 Files.delete(classFile); 78 79 loadAndRun(jarFilePath); 80 81 // Give the GC a chance to unload protection domains 82 for (int i = 0; i < 100; i++) { 83 System.gc(); 84 } 85 System.out.println("All Classloaders and protection domain cache entries successfully unloaded"); 86 } 87 }