1 /*

     2  * Copyright (c) 2018, 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 

    25 import sun.hotspot.WhiteBox;

    26 

    27 //

    28 // Help test archived box cache consistency.

    29 //

    30 // Takes two arguments:

    31 // 0: the expected maximum value expected to be archived

    32 // 1: if the values are expected to be retrieved from the archive or not

    33 //    (only applies to IntegerCache; other caches should always be mapped

    34 //    from archive)

    35 //

    36 public class CheckIntegerCacheApp {

    37     static WhiteBox wb;

    38 

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

    40         wb = WhiteBox.getWhiteBox();

    41 

    42         if (!wb.areOpenArchiveHeapObjectsMapped()) {

    43             System.out.println("This may happen during normal operation. Test Skipped.");

    44             return;

    45         }

    46 

    47         if (args.length != 2) {

    48             throw new RuntimeException(

    49                     "FAILED. Incorrect argument length: " + args.length);

    50         }

    51 

    52         boolean archivedExpected = Boolean.parseBoolean(args[1]);

    53 

    54         // Base JLS compliance check

    55         for (int i = -128; i <= 127; i++) {

    56             if (Integer.valueOf(i) != Integer.valueOf(i)) {

    57                 throw new RuntimeException(

    58                         "FAILED. All values in range [-128, 127] should be interned in cache: " + i);

    59             }

    60             if (Byte.valueOf((byte)i) != Byte.valueOf((byte)i)) {

    61                 throw new RuntimeException(

    62                         "FAILED. All Byte values in range [-128, 127] should be interned in cache: " + (byte)i);

    63             }

    64             if (Short.valueOf((short)i) != Short.valueOf((short)i)) {

    65                 throw new RuntimeException(

    66                         "FAILED. All Short values in range [-128, 127] should be interned in cache: " + (byte)i);

    67             }

    68             if (Long.valueOf(i) != Long.valueOf(i)) {

    69                 throw new RuntimeException(

    70                         "FAILED. All Long values in range [-128, 127] should be interned in cache: " + i);

    71             }

    72             checkArchivedAsExpected(archivedExpected, Integer.valueOf(i));

    73             checkArchivedAsExpected(true, Byte.valueOf((byte)i));

    74             checkArchivedAsExpected(true, Short.valueOf((short)i));

    75             checkArchivedAsExpected(true, Long.valueOf(i));

    76 

    77             // Character cache only values 0 through 127

    78             if (i >= 0) {

    79                 if (Character.valueOf((char)i) != Character.valueOf((char)i)) {

    80                     throw new RuntimeException(

    81                             "FAILED. All Character values in range [0, 127] should be interned in cache: " + i);

    82                 }

    83                 checkArchivedAsExpected(true, Character.valueOf((char)i));

    84             }

    85         }

    86 

    87         int high = Integer.parseInt(args[0]);

    88         if (Integer.valueOf(high) != Integer.valueOf(high)) {

    89             throw new RuntimeException(

    90                     "FAILED. Value expected to be retrieved from cache: " + high);

    91         }

    92         checkArchivedAsExpected(archivedExpected, Integer.valueOf(high));

    93 

    94         if (Integer.valueOf(high + 1) == Integer.valueOf(high + 1)) {

    95             throw new RuntimeException(

    96                     "FAILED. Value not expected to be retrieved from cache: " + high);

    97         }

    98         checkArchivedAsExpected(false, Integer.valueOf(high + 1));

    99         checkArchivedAsExpected(false, Short.valueOf((short)128));

   100         checkArchivedAsExpected(false, Long.valueOf(128));

   101         checkArchivedAsExpected(false, Character.valueOf((char)128));

   102     }

   103 

   104     private static void checkArchivedAsExpected(boolean archivedExpected, Object value) {

   105         if (archivedExpected) {

   106             if (!wb.isShared(value)) {

   107                 throw new RuntimeException(

   108                         "FAILED. Value expected to be archived: " + value +

   109                         " of type " + value.getClass().getName());

   110             }

   111         } else {

   112             if (wb.isShared(value)) {

   113                 throw new RuntimeException(

   114                         "FAILED. Value not expected to be archived: " + value +

   115                         " of type " + value.getClass().getName());

   116             }

   117         }

   118     }

   119 }