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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

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 *

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 * version 2 for more details (a copy is included in the LICENSE file that

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 *

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 * 2 along with this work; if not, write to the Free Software Foundation,

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 */

 * @test

 * @summary Check to make sure that shared strings in the bootstrap CDS archive

 *          are actually shared

 * Feature support: G1GC only, compressed oops/kptrs, 64-bit os, not on windows

 * @requires (sun.arch.data.model != "32") & (os.family != "windows")

 * @requires (vm.opt.UseCompressedOops == null) | (vm.opt.UseCompressedOops == true)

 * @requires vm.gc.G1

 * @library /test/lib

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

 *          java.management

 * @build SharedStringsWb sun.hotspot.WhiteBox

 * @run main ClassFileInstaller -jar whitebox.jar sun.hotspot.WhiteBox

 * @run main SharedStrings

 */

import jdk.test.lib.cds.CDSTestUtils;

import jdk.test.lib.process.ProcessTools;

import jdk.test.lib.process.OutputAnalyzer;

public class SharedStrings {

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

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

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

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

        // test utils methods.

        ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(

            "-XX:+UnlockDiagnosticVMOptions",

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

            "-XX:+UseG1GC",

            "-XX:+UseCompressedOops",

            "-Xlog:cds,cds+hashtables",

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

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

            "-Xshare:dump");

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

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

        pb = ProcessTools.createJavaProcessBuilder(

                "-XX:+UnlockDiagnosticVMOptions",

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

                // these are required modes for shared strings

                "-XX:+UseCompressedOops", "-XX:+UseG1GC",

                // needed for access to white box test API

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

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

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

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

        CDSTestUtils.checkExec(out);

    }

}