--- /dev/null 2016-08-08 10:37:41.412049151 +0200 +++ new/test/gc/class_unloading/TestClassUnloadingDisabled.java 2016-09-01 14:58:00.734371459 +0200 @@ -0,0 +1,118 @@ +/* + * Copyright (c) 2016, Oracle and/or its affiliates. All rights reqserved. + * 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 { +}