jdk-24/hotspot/test/runtime/CDSCompressedKPtrs/XShareAuto.java

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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 * 2 along with this work; if not, write to the Free Software Foundation,
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/*
 * @test
 * @bug 8005933
 * @summary Test that -Xshare:auto uses CDS when explicitly specified with -server.
 * @library /test/lib
 * @modules java.base/jdk.internal.misc
 *          java.management
 * @run main XShareAuto
 */

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

public class XShareAuto {
    public static void main(String[] args) throws Exception {
        ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(
            "-server", "-XX:+UnlockDiagnosticVMOptions",
            "-XX:SharedArchiveFile=./XShareAuto.jsa", "-Xshare:dump");
        OutputAnalyzer output = new OutputAnalyzer(pb.start());
        output.shouldContain("Loading classes to share");
        output.shouldHaveExitValue(0);

        pb = ProcessTools.createJavaProcessBuilder(
            "-server", "-XX:+UnlockDiagnosticVMOptions",
            "-XX:SharedArchiveFile=./XShareAuto.jsa", "-version");
        output = new OutputAnalyzer(pb.start());
        // We asked for server but it could be aliased to something else
        if (output.getOutput().contains("Server VM")) {
            // In server case we don't expect to see sharing flag
            output.shouldNotContain("sharing");
            output.shouldHaveExitValue(0);
        }
        else {
            System.out.println("Skipping test - no Server VM available");
            return;
        }

        pb = ProcessTools.createJavaProcessBuilder(
            "-server", "-Xshare:auto", "-XX:+UnlockDiagnosticVMOptions",
            "-XX:SharedArchiveFile=./XShareAuto.jsa", "-XX:+PrintSharedSpaces", "-version");
        output = new OutputAnalyzer(pb.start());
        try {
            output.shouldContain("sharing");
        } catch (RuntimeException e) {
            // if sharing failed due to ASLR or similar reasons,
            // check whether sharing was attempted at all (UseSharedSpaces)
            output.shouldContain("UseSharedSpaces:");
            output.shouldNotContain("Unable to map %s");
        }
        output.shouldHaveExitValue(0);
    }
}