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/lib 30 * @build jdk.test.lib.Utils 31 * jdk.test.lib.util.JarUtils 32 * @build ClassForName ProtectionDomainCacheTest 33 * @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 34 */ 35 36 import java.net.URL; 37 import java.net.URLClassLoader; 38 import java.nio.file.FileSystems; 39 import java.nio.file.Files; 40 import java.nio.file.Path; 41 import java.nio.file.Paths; 42 import java.util.List; 43 import jdk.test.lib.Utils; 44 import jdk.test.lib.util.JarUtils; 45 46 /* 47 * Create .jar, load ClassForName from .jar using a URLClassLoader 48 */ 49 public class ProtectionDomainCacheTest { 50 private static final long TIMEOUT = (long)(5000.0 * Utils.TIMEOUT_FACTOR); 51 private static final String TESTCLASSES = System.getProperty("test.classes", "."); 52 private static final String CLASSFILENAME = "ClassForName.class"; 53 54 // Use a new classloader to load the ClassForName class. 55 public static void loadAndRun(Path jarFilePath) 56 throws Exception { 57 ClassLoader classLoader = new URLClassLoader( 58 new URL[]{jarFilePath.toUri().toURL()}) { 59 @Override public String toString() { return "LeakedClassLoader"; } 60 }; 61 62 Class<?> loadClass = Class.forName("ClassForName", true, classLoader); 63 loadClass.newInstance(); 64 65 System.out.println("returning : " + classLoader); 66 } 67 68 public static void main(final String[] args) throws Exception { 69 // Create a temporary .jar file containing ClassForName.class 70 Path testClassesDir = Paths.get(TESTCLASSES); 71 Path jarFilePath = Files.createTempFile("cfn", ".jar"); 72 JarUtils.createJarFile(jarFilePath, testClassesDir, CLASSFILENAME); 73 jarFilePath.toFile().deleteOnExit(); 74 75 // Remove the ClassForName.class file that jtreg built, to make sure 76 // we're loading from the tmp .jar 77 Path classFile = FileSystems.getDefault().getPath(TESTCLASSES, 78 CLASSFILENAME); 79 Files.delete(classFile); 80 81 loadAndRun(jarFilePath); 82 83 // Give the GC a chance to unload protection domains 84 for (int i = 0; i < 100; i++) { 85 System.gc(); 86 } 87 System.out.println("All Classloaders and protection domain cache entries successfully unloaded"); 88 } 89 }