1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/test/gc/class_unloading/TestClassUnloadingDisabled.java Fri Jul 20 03:07:49 2018 -0400
1.3 @@ -0,0 +1,116 @@
1.4 +/*
1.5 + * Copyright (c) 2018, Oracle and/or its affiliates. All rights reserved.
1.6 + * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
1.7 + *
1.8 + * This code is free software; you can redistribute it and/or modify it
1.9 + * under the terms of the GNU General Public License version 2 only, as
1.10 + * published by the Free Software Foundation.
1.11 + *
1.12 + * This code is distributed in the hope that it will be useful, but WITHOUT
1.13 + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
1.14 + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
1.15 + * version 2 for more details (a copy is included in the LICENSE file that
1.16 + * accompanied this code).
1.17 + *
1.18 + * You should have received a copy of the GNU General Public License version
1.19 + * 2 along with this work; if not, write to the Free Software Foundation,
1.20 + * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
1.21 + *
1.22 + * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
1.23 + * or visit www.oracle.com if you need additional information or have any
1.24 + * questions.
1.25 + */
1.26 +
1.27 +/*
1.28 + * @test
1.29 + * @key gc
1.30 + * @bug 8114823
1.31 + * @requires vm.gc == null
1.32 + * @requires vm.opt.ExplicitGCInvokesConcurrent != true
1.33 + * @requires vm.opt.ClassUnloading != true
1.34 + * @library /testlibrary /testlibrary/whitebox
1.35 + * @build sun.hotspot.WhiteBox
1.36 + * @run main ClassFileInstaller sun.hotspot.WhiteBox
1.37 + * sun.hotspot.WhiteBox$WhiteBoxPermission
1.38 + *
1.39 + * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI
1.40 + * -XX:-ClassUnloading -XX:+UseG1GC TestClassUnloadingDisabled
1.41 + *
1.42 + * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI
1.43 + * -XX:-ClassUnloading -XX:+UseSerialGC TestClassUnloadingDisabled
1.44 + *
1.45 + * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI
1.46 + * -XX:-ClassUnloading -XX:+UseParallelGC TestClassUnloadingDisabled
1.47 + *
1.48 + * @run main/othervm -Xbootclasspath/a:. -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI
1.49 + * -XX:-ClassUnloading -XX:+UseConcMarkSweepGC TestClassUnloadingDisabled
1.50 + */
1.51 +
1.52 +import java.io.File;
1.53 +import java.io.IOException;
1.54 +import java.nio.file.Files;
1.55 +import java.nio.file.Path;
1.56 +import java.nio.file.Paths;
1.57 +
1.58 +import sun.hotspot.WhiteBox;
1.59 +
1.60 +import com.oracle.java.testlibrary.Asserts;
1.61 +
1.62 +public class TestClassUnloadingDisabled {
1.63 + public static void main(String args[]) throws Exception {
1.64 + final WhiteBox wb = WhiteBox.getWhiteBox();
1.65 + // Fetch the dir where the test class and the class
1.66 + // to be loaded resides.
1.67 + String classDir = TestClassUnloadingDisabled.class.getProtectionDomain().getCodeSource().getLocation().getPath();
1.68 + String className = "ClassToLoadUnload";
1.69 +
1.70 + Asserts.assertFalse(wb.isClassAlive(className), "Should not be loaded yet");
1.71 +
1.72 + // The NoPDClassLoader handles loading classes in the test directory
1.73 + // and loads them without a protection domain, which in some cases
1.74 + // keeps the class live regardless of marking state.
1.75 + NoPDClassLoader nopd = new NoPDClassLoader(classDir);
1.76 + nopd.loadClass(className);
1.77 +
1.78 + Asserts.assertTrue(wb.isClassAlive(className), "Class should be loaded");
1.79 +
1.80 + // Clear the class-loader, class and object references to make
1.81 + // class unloading possible.
1.82 + nopd = null;
1.83 +
1.84 + System.gc();
1.85 + Asserts.assertTrue(wb.isClassAlive(className), "Class should not have ben unloaded");
1.86 + }
1.87 +}
1.88 +
1.89 +class NoPDClassLoader extends ClassLoader {
1.90 + String path;
1.91 +
1.92 + NoPDClassLoader(String path) {
1.93 + this.path = path;
1.94 + }
1.95 +
1.96 + public Class<?> loadClass(String name) throws ClassNotFoundException {
1.97 + byte[] cls = null;
1.98 + File f = new File(path,name + ".class");
1.99 +
1.100 + // Delegate class loading if class not present in the given
1.101 + // directory.
1.102 + if (!f.exists()) {
1.103 + return super.loadClass(name);
1.104 + }
1.105 +
1.106 + try {
1.107 + Path path = Paths.get(f.getAbsolutePath());
1.108 + cls = Files.readAllBytes(path);
1.109 + } catch (IOException e) {
1.110 + throw new ClassNotFoundException(name);
1.111 + }
1.112 +
1.113 + // Define class with no protection domain and resolve it.
1.114 + return defineClass(name, cls, 0, cls.length, null);
1.115 + }
1.116 +}
1.117 +
1.118 +class ClassToLoadUnload {
1.119 +}
