test/hotspot/jtreg/serviceability/sa/CDSJMapClstats.java

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/**
 * @test
 * @bug 8204308
 * @summary Test the jhsdb jmap -clstats command with CDS enabled
 * @requires vm.hasSAandCanAttach & vm.cds
 * @library /test/lib
 * @run main/othervm/timeout=2400 CDSJMapClstats
 */

import java.util.List;
import java.util.Arrays;
import java.util.stream.Collectors;
import jdk.test.lib.cds.CDSTestUtils;
import jdk.test.lib.cds.CDSOptions;
import jdk.test.lib.apps.LingeredApp;
import jdk.test.lib.process.OutputAnalyzer;
import jdk.test.lib.process.ProcessTools;
import jdk.test.lib.JDKToolLauncher;

public class CDSJMapClstats {

    private static void runClstats(long lingeredAppPid) throws Exception {

        JDKToolLauncher launcher = JDKToolLauncher.createUsingTestJDK("jhsdb");
        launcher.addToolArg("jmap");
        launcher.addToolArg("--clstats");
        launcher.addToolArg("--pid");
        launcher.addToolArg(Long.toString(lingeredAppPid));

        ProcessBuilder processBuilder = new ProcessBuilder();
        processBuilder.command(launcher.getCommand());
        System.out.println(
            processBuilder.command().stream().collect(Collectors.joining(" ")));

        OutputAnalyzer SAOutput = ProcessTools.executeProcess(processBuilder);
        System.out.println(SAOutput.getOutput());
        SAOutput.shouldHaveExitValue(0);
        SAOutput.shouldContain("BootClassLoader");
    }


    public static void main(String[] args) throws Exception {
        System.out.println("Starting CDSJMapClstats test");
        String sharedArchiveName = "ArchiveForCDSJMapClstats.jsa";
        LingeredApp theApp = null;

        try {
            CDSOptions opts = (new CDSOptions()).setArchiveName(sharedArchiveName);
            CDSTestUtils.createArchiveAndCheck(opts);

            List<String> vmArgs = Arrays.asList(
                "-XX:+UnlockDiagnosticVMOptions",
                "-XX:SharedArchiveFile=" + sharedArchiveName,
                "-Xshare:auto");
            theApp = LingeredApp.startApp(vmArgs);
            System.out.println("Started LingeredApp with pid " + theApp.getPid());
            runClstats(theApp.getPid());
        } catch (Exception ex) {
            throw new RuntimeException("Test ERROR " + ex, ex);
        } finally {
            LingeredApp.stopApp(theApp);
        }
        System.out.println("Test PASSED");
    }
}