1 /*
   2  * Copyright (c) 2014, 2017, 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
  27  * @summary If -Djava.system.class.loader=xxx is specified in command-line, disable UseAppCDS
  28  * @requires vm.cds
  29  * @library /test/lib
  30  * @modules java.base/jdk.internal.misc
  31  *      jdk.jartool/sun.tools.jar
  32  * @compile test-classes/TestClassLoader.java
  33  * @compile test-classes/ReportMyLoader.java
  34  * @compile test-classes/TrySwitchMyLoader.java
  35  * @run main SpecifySysLoaderProp
  36  */
  37 
  38 import java.io.*;
  39 import jdk.test.lib.process.OutputAnalyzer;
  40 
  41 public class SpecifySysLoaderProp {
  42 
  43   public static void main(String[] args) throws Exception {
  44     JarBuilder.build("sysloader", "TestClassLoader", "ReportMyLoader", "TrySwitchMyLoader");
  45 
  46     String jarFileName = "sysloader.jar";
  47     String appJar = TestCommon.getTestJar(jarFileName);
  48     TestCommon.testDump(appJar, TestCommon.list("ReportMyLoader"));
  49     String warning = "VM warning: UseAppCDS is disabled because the java.system.class.loader property is specified";
  50 
  51 
  52     // (0) Baseline. Do not specify -Djava.system.class.loader
  53     //     The test class should be loaded from archive
  54     TestCommon.run(
  55         "-verbose:class",
  56         "-cp", appJar,
  57         "ReportMyLoader")
  58       .assertNormalExit("[class,load] ReportMyLoader source: shared objects file",
  59                         "ReportMyLoader's loader = jdk.internal.loader.ClassLoaders$AppClassLoader@");
  60 
  61     // (1) Try to execute the archive with -Djava.system.class.loader=no.such.Klass,
  62     //     it should fail
  63     TestCommon.run(
  64         "-cp", appJar,
  65         "-Djava.system.class.loader=no.such.Klass",
  66         "ReportMyLoader")
  67       .assertAbnormalExit(output -> {
  68           output.shouldContain(warning);
  69           output.shouldContain("ClassNotFoundException: no.such.Klass");
  70         });
  71 
  72     // (2) Try to execute the archive with -Djava.system.class.loader=TestClassLoader,
  73     //     it should run, but AppCDS should be disabled
  74     TestCommon.run(
  75         "-verbose:class",
  76         "-cp", appJar,
  77         "-Djava.system.class.loader=TestClassLoader",
  78         "ReportMyLoader")
  79       .assertNormalExit("ReportMyLoader's loader = jdk.internal.loader.ClassLoaders$AppClassLoader@", //<-this is still printed because TestClassLoader simply delegates to Launcher$AppLoader, but ...
  80              "TestClassLoader.called = true", //<-but this proves that TestClassLoader was indeed called.
  81              "TestClassLoader: loadClass(\"ReportMyLoader\",") //<- this also proves that TestClassLoader was indeed called.
  82       .assertNormalExit(output -> {
  83         output.shouldMatch(".class,load. TestClassLoader source: file:");
  84         output.shouldMatch(".class,load. ReportMyLoader source: file:.*" + jarFileName);
  85         });
  86 
  87     // (3) Try to change the java.system.class.loader programmatically after
  88     //     the app's main method is executed. This should have no effect in terms of
  89     //     changing or switching the actual system class loader that's already in use.
  90     TestCommon.run(
  91         "-verbose:class",
  92         "-cp", appJar,
  93         "TrySwitchMyLoader")
  94       .assertNormalExit("[class,load] ReportMyLoader source: shared objects file",
  95              "TrySwitchMyLoader's loader = jdk.internal.loader.ClassLoaders$AppClassLoader@",
  96              "ReportMyLoader's loader = jdk.internal.loader.ClassLoaders$AppClassLoader@",
  97              "TestClassLoader.called = false");
  98   }
  99 }