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/*
 * @test
 * @bug 8278602
 * @summary Lots of classes being unloaded while we try to dump a dynamic archive
 * @requires vm.cds
 * @library /test/lib /test/hotspot/jtreg/runtime/cds/appcds
 *          /test/hotspot/jtreg/runtime/cds/appcds/dynamicArchive/test-classes
 * @build jdk.test.whitebox.WhiteBox
 * @build LotsUnloadApp
 * @run driver jdk.test.lib.helpers.ClassFileInstaller jdk.test.whitebox.WhiteBox
 * @run driver jdk.test.lib.helpers.ClassFileInstaller -jar LotsUnloadApp.jar LotsUnloadApp DefinedAsHiddenKlass
 * @run main/othervm -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI -Xbootclasspath/a:. LotsUnloadTest
 */

// Note: for https://bugs.openjdk.java.net/browse/JDK-8278602, this test case does NOT
// reliably reproduce the problem. Reproduction requires patching ZGC. Please see
// the bug report for instructions.
//
// This test case is included so that it may find a similar bug under stress conditions
// in the CI runs.
import jdk.test.lib.helpers.ClassFileInstaller;

public class LotsUnloadTest extends DynamicArchiveTestBase {
    public static void main(String[] args) throws Exception {
        runTest(LotsUnloadTest::test);
    }

    static void test() throws Exception {
        String topArchiveName = getNewArchiveName();
        String appJar = ClassFileInstaller.getJarPath("LotsUnloadApp.jar");
        String mainClass = "LotsUnloadApp";
        String logging;

        if (Boolean.getBoolean("verbose.LotsUnloadTest")) {
            // class+unload logs may change GC timing and cause the bug to be
            // less reproducible.
            logging = "-Xlog:cds,class+unload";
        } else {
            logging = "-Xlog:cds";
        }

        dump(topArchiveName,
             logging,
             "-Xmx64m", "-Xms32m",
             "-cp", appJar, mainClass)
          .assertNormalExit(output -> {
                output.shouldHaveExitValue(0);
            });

        run(topArchiveName,
            logging,
            "-Xmx64m", "-Xms32m",
            "-cp", appJar, mainClass)
          .assertNormalExit(output -> {
              output.shouldHaveExitValue(0);
            });
    }
}