1 /* 2 * Copyright (c) 2016, 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 /testlibrary /runtime/testlibrary 30 * @library classes 31 * @build ClassUnloadCommon test.Empty jdk.test.lib.* jdk.test.lib.OutputAnalyzer jdk.test.lib.ProcessTools 32 * @run driver LoaderConstraintsTest 33 */ 34 35 import jdk.test.lib.*; 36 import java.lang.ref.WeakReference; 37 import java.lang.reflect.Method; 38 import java.util.ArrayList; 39 import java.util.Collections; 40 import java.util.List; 41 42 public class LoaderConstraintsTest { 43 private static OutputAnalyzer out; 44 private static ProcessBuilder pb; 45 private static class ClassUnloadTestMain { 46 public static void main(String... args) throws Exception { 47 String className = "test.Empty"; 48 ClassLoader cl = ClassUnloadCommon.newClassLoader(); 49 Class<?> c = cl.loadClass(className); 50 cl = null; c = null; 51 ClassUnloadCommon.triggerUnloading(); 52 } 53 } 54 55 // Use the same command-line heap size setting as ../ClassUnload/UnloadTest.java 56 static ProcessBuilder exec(String... args) throws Exception { 57 List<String> argsList = new ArrayList<>(); 58 Collections.addAll(argsList, args); 59 Collections.addAll(argsList, "-Xmn8m"); 60 Collections.addAll(argsList, "-Dtest.classes=" + System.getProperty("test.classes",".")); 61 Collections.addAll(argsList, ClassUnloadTestMain.class.getName()); 62 return ProcessTools.createJavaProcessBuilder(argsList.toArray(new String[argsList.size()])); 63 } 64 65 public static void main(String... args) throws Exception { 66 67 // -XX:+TraceLoaderConstraints 68 pb = exec("-XX:+TraceLoaderConstraints"); 69 out = new OutputAnalyzer(pb.start()); 70 out.getOutput(); 71 out.shouldContain("[class,loader,constraints] adding new constraint for name: java/lang/Class, loader[0]: jdk/internal/loader/ClassLoaders$AppClassLoader, loader[1]: <bootloader>"); 72 73 // -Xlog:class+loader+constraints=info 74 pb = exec("-Xlog:class+loader+constraints=info"); 75 out = new OutputAnalyzer(pb.start()); 76 out.shouldContain("[class,loader,constraints] adding new constraint for name: java/lang/Class, loader[0]: jdk/internal/loader/ClassLoaders$AppClassLoader, loader[1]: <bootloader>"); 77 78 // -XX:-TraceLoaderConstraints 79 pb = exec("-XX:-TraceLoaderConstraints"); 80 out = new OutputAnalyzer(pb.start()); 81 out.shouldNotContain("[class,loaderconstraints]"); 82 83 // -Xlog:class+loader+constraints=off 84 pb = exec("-Xlog:class+loader+constraints=off"); 85 out = new OutputAnalyzer(pb.start()); 86 out.shouldNotContain("[class,loader,constraints]"); 87 88 } 89 }