1 /*

     2  * Copyright (c) 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  * @test

    26  * @bug 8179950

    27  * @build CustomLoader InitSystemLoaderTest

    28  * @run main/othervm -Djava.system.class.loader=CustomLoader InitSystemLoaderTest

    29  * @summary Test custom system loader initialization and verify their ancestors

    30  */

    31 

    32 public class InitSystemLoaderTest {

    33     public static void main(String... args) {

    34         // check that system class loader is the custom loader

    35         ClassLoader loader = ClassLoader.getSystemClassLoader();

    36         if (loader != CustomLoader.INSTANCE) {

    37             throw new RuntimeException("Expected custom loader: "

    38                 + CustomLoader.INSTANCE + " got: " + loader);

    39         }

    40 

    41         // parent of the custom loader should be builtin system class loader

    42         ClassLoader builtinSystemLoader = loader.getParent();

    43         ClassLoader grandparent = builtinSystemLoader.getParent();

    44         if (grandparent != ClassLoader.getPlatformClassLoader()) {

    45             throw new RuntimeException("Expected class loader ancestor: "

    46                 + ClassLoader.getPlatformClassLoader() + " got: " + grandparent);

    47         }

    48     }

    49 }