1 /*

     2  * Copyright (c) 2015, 2018, 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  * @summary Check to make sure that shared strings in the bootstrap CDS archive

    27  *          are actually shared

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

    29  * @library /test/lib

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

    31  *          java.management

    32  * @build SharedStringsWb sun.hotspot.WhiteBox

    33  * @run driver ClassFileInstaller -jar whitebox.jar sun.hotspot.WhiteBox

    34  * @run driver SharedStrings

    35  */

    36 

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

    38 import jdk.test.lib.process.ProcessTools;

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

    40 

    41 public class SharedStrings {

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

    43         // Note: This is a basic sanity test for Shared Strings feature.

    44         // This also serves as a reference on how to use this feature,

    45         // hence the command lines are spelled out instead of using the

    46         // test utils methods.

    47         ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(

    48             "-XX:+UnlockDiagnosticVMOptions",

    49             "-XX:SharedArchiveFile=./SharedStrings.jsa",

    50             "-Xlog:cds,cds+hashtables",

    51             // Needed for bootclasspath match, for CDS to work with WhiteBox API

    52             "-Xbootclasspath/a:" + ClassFileInstaller.getJarPath("whitebox.jar"),

    53             "-Xshare:dump");

    54 

    55         OutputAnalyzer out = CDSTestUtils.executeAndLog(pb, "dump");

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

    57 

    58 

    59         pb = ProcessTools.createJavaProcessBuilder(

    60                 "-XX:+UnlockDiagnosticVMOptions",

    61                 "-XX:SharedArchiveFile=./SharedStrings.jsa",

    62                 // needed for access to white box test API

    63                 "-Xbootclasspath/a:" + ClassFileInstaller.getJarPath("whitebox.jar"),

    64                 "-XX:+UnlockDiagnosticVMOptions", "-XX:+WhiteBoxAPI",

    65                 "-Xshare:on", "-showversion", "SharedStringsWb");

    66 

    67         out = CDSTestUtils.executeAndLog(pb, "exec");

    68         CDSTestUtils.checkExec(out);

    69     }

    70 }