1 /*

     2  * Copyright (c) 2019, 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 import java.net.URL;

    25 import java.net.URLClassLoader;

    26 import java.nio.file.Path;

    27 import java.nio.file.Paths;

    28 

    29 /*

    30  * @test

    31  * @bug 8231924 8233091 8233272

    32  * @summary Confirm load (but not link) behavior of Class.forName()

    33  * @library /test/lib

    34  *

    35  * @compile MissingClass.java Container.java

    36  *

    37  * @run driver ClassFileInstaller -jar classes.jar Container Container$1

    38  *

    39  * @run main/othervm NonLinking init

    40  * @run main/othervm NonLinking load

    41  */

    42 /*

    43  * The @compile and '@main ClassFileInstaller' tasks above create a classes.jar

    44  * file containing the .class file for Container, but not MissingClass.

    45  */

    46 

    47 public class NonLinking {

    48     public static void main(String[] args) throws Throwable {

    49         Path jarPath = Paths.get("classes.jar");

    50         URL url = jarPath.toUri().toURL();

    51         URLClassLoader ucl1 = new URLClassLoader("UCL1",

    52                                                  new URL[] { url },

    53                                                  null); // Don't delegate

    54         switch(args[0]) {

    55             case "init":

    56                 try {

    57                     // Trying to initialize Container without MissingClass -> NCDFE

    58                     Class.forName("Container", true, ucl1);

    59                     throw new RuntimeException("Missed expected NoClassDefFoundError");

    60                 } catch (NoClassDefFoundError expected) {

    61                     final String CLASSNAME = "MissingClass";

    62                     Throwable cause = expected.getCause();

    63                     if (!cause.getMessage().contains(CLASSNAME)) {

    64                         throw new RuntimeException("Cause of NoClassDefFoundError does not contain \"" + CLASSNAME + "\"", cause);

    65                     }

    66                 }

    67                 break;

    68             case "load":

    69                 // Loading (but not linking) Container will succeed.

    70                 // Before 8233091, this fails with NCDFE due to linking.

    71                 Class.forName("Container", false, ucl1);

    72                 break;

    73             default:

    74                 throw new RuntimeException("Unknown command: " + args[0]);

    75         }

    76     }

    77 }