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 ClassLoadUnloadTest
  27  * @bug 8142506
  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 ClassLoadUnloadTest
  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 ClassLoadUnloadTest {
  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     static void checkFor(String... outputStrings) throws Exception {
  56         out = new OutputAnalyzer(pb.start());
  57         for (String s: outputStrings) {
  58             out.shouldContain(s);
  59         }
  60         out.shouldHaveExitValue(0);
  61     }
  62 
  63     static void checkAbsent(String... outputStrings) throws Exception {
  64         out = new OutputAnalyzer(pb.start());
  65         for (String s: outputStrings) {
  66             out.shouldNotContain(s);
  67         }
  68         out.shouldHaveExitValue(0);
  69     }
  70 
  71     // Use the same command-line heap size setting as ../ClassUnload/UnloadTest.java
  72     static ProcessBuilder exec(String... args) throws Exception {
  73         List<String> argsList = new ArrayList<>();
  74         Collections.addAll(argsList, args);
  75         Collections.addAll(argsList, "-Xmn8m");
  76         Collections.addAll(argsList, "-Dtest.classes=" + System.getProperty("test.classes","."));
  77         Collections.addAll(argsList, ClassUnloadTestMain.class.getName());
  78         return ProcessTools.createJavaProcessBuilder(argsList.toArray(new String[argsList.size()]));
  79     }
  80 
  81     public static void main(String... args) throws Exception {
  82 
  83         //  -Xlog:class+unload=info
  84         pb = exec("-Xlog:class+unload=info");
  85         checkFor("[class,unload]", "unloading class");
  86 
  87         //  -Xlog:class+unload=off
  88         pb = exec("-Xlog:class+unload=off");
  89         checkAbsent("[class,unload]");
  90 
  91         //  -XX:+TraceClassUnloading
  92         pb = exec("-XX:+TraceClassUnloading");
  93         checkFor("[class,unload]", "unloading class");
  94 
  95         //  -XX:-TraceClassUnloading
  96         pb = exec("-XX:-TraceClassUnloading");
  97         checkAbsent("[class,unload]");
  98 
  99         //  -Xlog:class+load=info
 100         pb = exec("-Xlog:class+load=info");
 101         checkFor("[class,load]", "java.lang.Object", "source:");
 102 
 103         //  -Xlog:class+load=debug
 104         pb = exec("-Xlog:class+load=debug");
 105         checkFor("[class,load]", "java.lang.Object", "source:", "klass:", "super:", "loader:", "bytes:");
 106 
 107         //  -Xlog:class+load=off
 108         pb = exec("-Xlog:class+load=off");
 109         checkAbsent("[class,load]");
 110 
 111         //  -XX:+TraceClassLoading
 112         pb = exec("-XX:+TraceClassLoading");
 113         checkFor("[class,load]", "java.lang.Object", "source:");
 114 
 115         //  -XX:-TraceClassLoading
 116         pb = exec("-XX:-TraceClassLoading");
 117         checkAbsent("[class,load]");
 118 
 119         //  -verbose:class
 120         pb = exec("-verbose:class");
 121         checkFor("[class,load]", "java.lang.Object", "source:");
 122         checkFor("[class,unload]", "unloading class");
 123 
 124         //  -Xlog:class+loader+data=trace
 125         pb = exec("-Xlog:class+loader+data=trace");
 126         checkFor("[class,loader,data]", "create class loader data");
 127 
 128     }
 129 }