1 /*

     2  * Copyright (c) 2015, 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 import java.io.File;

    26 import java.net.URL;

    27 import java.net.URLClassLoader;

    28 import sun.hotspot.WhiteBox;

    29 

    30 public class UnloadUnregisteredLoader {

    31     public static void main(String args[]) throws Exception {

    32         String path = args[0];

    33         URL url = new File(path).toURI().toURL();

    34         URL[] urls = new URL[] {url};

    35         WhiteBox wb = WhiteBox.getWhiteBox();

    36         String className = "CustomLoadee";

    37 

    38         for (int i=0; i<5; i++) {

    39             doit(urls, className, (i == 0));

    40 

    41             ClassUnloadCommon.triggerUnloading();

    42             ClassUnloadCommon.failIf(wb.isClassAlive(className), "should have been unloaded");

    43         }

    44     }

    45 

    46   public static void doit(URL urls[], String className, boolean isFirstTime) throws Exception {

    47         ClassLoader appLoader = UnloadUnregisteredLoader.class.getClassLoader();

    48         URLClassLoader custLoader = new URLClassLoader(urls, appLoader);

    49 

    50         Class klass = custLoader.loadClass(className);

    51         WhiteBox wb = WhiteBox.getWhiteBox();

    52         if (wb.isSharedClass(UnloadUnregisteredLoader.class)) {

    53             if (isFirstTime) {

    54                 // First time: we should be able to load the class from the CDS archive

    55                 if (!wb.isSharedClass(klass)) {

    56                     throw new RuntimeException("wb.isSharedClass(klass) should be true for first time");

    57                 }

    58             } else {

    59                 // Second time:  the class in the CDS archive is not available, because it has not been cleaned

    60                 // up (see bug 8140287), so we must load the class dynamically.

    61                 //

    62                 // FIXME: after 8140287 is fixed, class should be shard regardless of isFirstTime.

    63                 if (wb.isSharedClass(klass)) {

    64                     throw new RuntimeException("wb.isSharedClass(klass) should be false for second time");

    65                 }

    66             }

    67         }

    68     }

    69 }