1 /* 2 * Copyright (c) 2016, 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 /* 26 * @test LoaderConstraintsTest 27 * @bug 8149996 28 * @modules java.base/jdk.internal.misc 29 * @library /test/lib /runtime/testlibrary classes 30 * @run driver LoaderConstraintsTest 31 */ 32 33 import jdk.test.lib.process.ProcessTools; 34 import jdk.test.lib.process.OutputAnalyzer; 35 import java.lang.ref.WeakReference; 36 import java.lang.reflect.Method; 37 import java.util.ArrayList; 38 import java.util.Collections; 39 import java.util.List; 40 41 public class LoaderConstraintsTest { 42 private static OutputAnalyzer out; 43 private static ProcessBuilder pb; 44 private static class ClassUnloadTestMain { 45 public static void main(String... args) throws Exception { 46 String className = "test.Empty"; 47 ClassLoader cl = ClassUnloadCommon.newClassLoader(); 48 Class<?> c = cl.loadClass(className); 49 cl = null; c = null; 50 ClassUnloadCommon.triggerUnloading(); 51 } 52 } 53 54 // Use the same command-line heap size setting as ../ClassUnload/UnloadTest.java 55 static ProcessBuilder exec(String... args) throws Exception { 56 List<String> argsList = new ArrayList<>(); 57 Collections.addAll(argsList, args); 58 Collections.addAll(argsList, "-Xmn8m"); 59 Collections.addAll(argsList, "-Dtest.classes=" + System.getProperty("test.classes",".")); 60 Collections.addAll(argsList, ClassUnloadTestMain.class.getName()); 61 return ProcessTools.createJavaProcessBuilder(argsList.toArray(new String[argsList.size()])); 62 } 63 64 public static void main(String... args) throws Exception { 65 66 // -XX:+TraceLoaderConstraints 67 pb = exec("-XX:+TraceLoaderConstraints"); 68 out = new OutputAnalyzer(pb.start()); 69 out.getOutput(); 70 out.shouldContain("[class,loader,constraints] adding new constraint for name: java/lang/Class, loader[0]: 'app', loader[1]: 'bootstrap'"); 71 72 // -Xlog:class+loader+constraints=info 73 pb = exec("-Xlog:class+loader+constraints=info"); 74 out = new OutputAnalyzer(pb.start()); 75 out.shouldContain("[class,loader,constraints] adding new constraint for name: java/lang/Class, loader[0]: 'app', loader[1]: 'bootstrap'"); 76 77 // -XX:-TraceLoaderConstraints 78 pb = exec("-XX:-TraceLoaderConstraints"); 79 out = new OutputAnalyzer(pb.start()); 80 out.shouldNotContain("[class,loaderconstraints]"); 81 82 // -Xlog:class+loader+constraints=off 83 pb = exec("-Xlog:class+loader+constraints=off"); 84 out = new OutputAnalyzer(pb.start()); 85 out.shouldNotContain("[class,loader,constraints]"); 86 87 } 88 }