| /* |
| * Copyright (c) 2016, 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. |
| */ |
| |
| /* |
| * @test |
| * @key gc |
| * @bug 8114823 |
| * @requires vm.gc == null |
| * @requires vm.opt.ExplicitGCInvokesConcurrent != true |
| * @requires vm.opt.ClassUnloading != true |
| * @library /test/lib |
| * @modules java.base/jdk.internal.misc |
| * java.management |
| * @build sun.hotspot.WhiteBox |
| * @run main ClassFileInstaller sun.hotspot.WhiteBox |
| * sun.hotspot.WhiteBox$WhiteBoxPermission |
| * |
| * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI |
| * -XX:-ClassUnloading -XX:+UseG1GC TestClassUnloadingDisabled |
| * |
| * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI |
| * -XX:-ClassUnloading -XX:+UseSerialGC TestClassUnloadingDisabled |
| * |
| * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI |
| * -XX:-ClassUnloading -XX:+UseParallelGC TestClassUnloadingDisabled |
| * |
| * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI |
| * -XX:-ClassUnloading -XX:+UseConcMarkSweepGC TestClassUnloadingDisabled |
| */ |
| |
| import java.io.File; |
| import java.io.IOException; |
| import java.nio.file.Files; |
| import java.nio.file.Path; |
| import java.nio.file.Paths; |
| |
| import sun.hotspot.WhiteBox; |
| |
| import static jdk.test.lib.Asserts.*; |
| |
| public class TestClassUnloadingDisabled { |
| public static void main(String args[]) throws Exception { |
| final WhiteBox wb = WhiteBox.getWhiteBox(); |
| // Fetch the dir where the test class and the class |
| // to be loaded resides. |
| String classDir = TestClassUnloadingDisabled.class.getProtectionDomain().getCodeSource().getLocation().getPath(); |
| String className = "ClassToLoadUnload"; |
| |
| assertFalse(wb.isClassAlive(className), "Should not be loaded yet"); |
| |
| // The NoPDClassLoader handles loading classes in the test directory |
| // and loads them without a protection domain, which in some cases |
| // keeps the class live regardless of marking state. |
| NoPDClassLoader nopd = new NoPDClassLoader(classDir); |
| nopd.loadClass(className); |
| |
| assertTrue(wb.isClassAlive(className), "Class should be loaded"); |
| |
| // Clear the class-loader, class and object references to make |
| // class unloading possible. |
| nopd = null; |
| |
| System.gc(); |
| assertTrue(wb.isClassAlive(className), "Class should not have ben unloaded"); |
| } |
| } |
| |
| class NoPDClassLoader extends ClassLoader { |
| String path; |
| |
| NoPDClassLoader(String path) { |
| this.path = path; |
| } |
| |
| public Class<?> loadClass(String name) throws ClassNotFoundException { |
| byte[] cls = null; |
| File f = new File(path,name + ".class"); |
| |
| // Delegate class loading if class not present in the given |
| // directory. |
| if (!f.exists()) { |
| return super.loadClass(name); |
| } |
| |
| try { |
| Path path = Paths.get(f.getAbsolutePath()); |
| cls = Files.readAllBytes(path); |
| } catch (IOException e) { |
| throw new ClassNotFoundException(name); |
| } |
| |
| // Define class with no protection domain and resolve it. |
| return defineClass(name, cls, 0, cls.length, null); |
| } |
| } |
| |
| class ClassToLoadUnload { |
| } |