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 }