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 sun.hotspot.WhiteBox;

    25 

    26 /**

    27  * This is a generic test app for testing if classes are loaded from the CDS archive

    28  * or not (without having to parse -Xlog:class+load, or writing your own WhiteBox apps).

    29  * Usage:

    30  *     [1] Create an archive with WhiteBox enabled.

    31  *     [2] Run this app with arguments such as

    32  *             "assertShared:java.lang.Object"

    33  *             "assertNotShared:NotSharedClassName"

    34  *

    35  * We can probably add other kinds of simple tests as well ....

    36  *

    37  * FIXME: enhance WB API to check if a particular archive has failed. So you can say

    38  *        assertShared:0,java.lang.Object

    39  * to assert that java.lang.Object is shared from archive #0 (i.e., base archive).

    40  */

    41 public class GenericTestApp {

    42     private static final WhiteBox wb = WhiteBox.getWhiteBox();

    43 

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

    45         System.out.println("GenericTestApp started. WhiteBox = " + wb);

    46         System.out.println("cdsMemoryMappingFailed() = " + cdsMemoryMappingFailed());

    47 

    48         for (String s : args) {

    49             Class c;

    50             if ((c = getClass(s, "assertShared:")) != null) {

    51                 assertShared(c);

    52             }

    53             else if ((c = getClass(s, "assertNotShared:")) != null) {

    54                 assertNotShared(c);

    55             }

    56             else {

    57                 throw new RuntimeException("Unknown option: " + s);

    58             }

    59             System.out.println("passed: " + s);

    60         }

    61     }

    62 

    63     private static Class getClass(String s, String prefix) throws Exception {

    64         if (s.startsWith(prefix)) {

    65             return Class.forName(s.substring(prefix.length()));

    66         } else {

    67             return null;

    68         }

    69     }

    70 

    71     private static boolean cdsMemoryMappingFailed() {

    72         return wb.cdsMemoryMappingFailed();

    73     }

    74 

    75     private static void assertShared(Class klass) {

    76         if (!cdsMemoryMappingFailed()) {

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

    78                 throw new RuntimeException("Class should be shared but is not: " + klass);

    79             }

    80         } else {

    81             // FIXME -- need to throw jtreg.SkippedException

    82             System.out.println("Cannot test for wb.isSharedClass(" + klass + ") because CDS mapping has failed");

    83         }

    84     }

    85 

    86     private static void assertNotShared(Class klass) {

    87         if (wb.isSharedClass(klass)) {

    88             throw new RuntimeException("Class should be shared but is not: " + klass);

    89         }

    90     }

    91 }