1 /*

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     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

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    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).

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    23 

    24 /**

    25  * @test SharedStringsDedup

    26  * @summary Test -Xshare:auto with shared strings and -XX:+UseStringDeduplication

    27  * @requires vm.cds.archived.java.heap

    28  * @library /test/lib

    29  * @modules java.base/jdk.internal.misc

    30  *          java.management

    31  * @run driver SharedStringsDedup

    32  */

    33 

    34 import jdk.test.lib.cds.CDSTestUtils;

    35 import jdk.test.lib.process.OutputAnalyzer;

    36 import java.io.File;

    37 

    38 // The main purpose is to test the interaction between shared strings

    39 // and -XX:+UseStringDeduplication. We run in -Xshare:auto mode so

    40 // we don't need to worry about CDS archive mapping failure (which

    41 // doesn't happen often so it won't impact coverage).

    42 public class SharedStringsDedup {

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

    44         OutputAnalyzer out =

    45             CDSTestUtils.createArchive();

    46         CDSTestUtils.checkDump(out, "Shared string table stats");

    47         CDSTestUtils.runWithArchiveAndCheck("-XX:+UseStringDeduplication");

    48     }

    49 }