CdsDifferentCompactStrings.java

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/*
 * @test CdsDifferentCompactStrings
 * @summary CDS (class data sharing) requires the same -XX:[+-]CompactStrings
 *          setting between archive creation time and load time.
 * @library /test/lib
 * @modules java.base/jdk.internal.misc
 *          java.management
 */

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

public class CdsDifferentCompactStrings {
    public static void main(String[] args) throws Exception {
        createAndLoadSharedArchive("+", "-");
        createAndLoadSharedArchive("-", "+");
    }

    private static void createAndLoadSharedArchive(String create, String load)
        throws Exception
    {
        String createCompactStringsArgument = "-XX:" + create + "CompactStrings";
        String loadCompactStringsArgument   = "-XX:" + load   + "CompactStrings";

        String filename = "./CdsDifferentCompactStrings" + create + ".jsa";

        ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(
            "-XX:+UnlockDiagnosticVMOptions",
            "-XX:SharedArchiveFile=" + filename,
            "-Xshare:dump",
            createCompactStringsArgument);

        OutputAnalyzer output = new OutputAnalyzer(pb.start());
        output.shouldContain("Loading classes to share");
        output.shouldHaveExitValue(0);

        pb = ProcessTools.createJavaProcessBuilder(
            "-XX:+UnlockDiagnosticVMOptions",
            "-XX:SharedArchiveFile=" + filename,
            "-Xshare:on",
            loadCompactStringsArgument,
            "-version");

        output = new OutputAnalyzer(pb.start());
        try {
            output.shouldContain("The shared archive file's CompactStrings " +
                "setting .* does not equal the current CompactStrings setting");
        } catch (RuntimeException e) {
            output.shouldContain("Unable to use shared archive");
        }
        output.shouldHaveExitValue(1);
    }
}