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import java.io.File;
import java.util.Arrays;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import jdk.test.lib.Utils;
import jdk.test.lib.apps.LingeredApp;
import jdk.test.lib.JDKToolLauncher;
import jdk.test.lib.process.OutputAnalyzer;
import jdk.test.lib.SA.SATestUtils;
import jtreg.SkippedException;

/**
 * @test
 * @bug 8240990
 * @summary Test clhsdb dumpclass command
 * @requires vm.hasSA
 * @library /test/lib
 * @run driver ClhsdbDumpclass
 */

public class ClhsdbDumpclass {
    static final String APP_DOT_CLASSNAME = LingeredApp.class.getName();
    static final String APP_SLASH_CLASSNAME = APP_DOT_CLASSNAME.replace('.', '/');

    public static void main(String[] args) throws Exception {
        if (SATestUtils.needsPrivileges()) {
            // This test will create a file as root that cannot be easily deleted, so don't run it.
            throw new SkippedException("Cannot run this test on OSX if adding privileges is required.");
        }
        System.out.println("Starting ClhsdbDumpclass test");

        LingeredApp theApp = null;
        try {
            ClhsdbLauncher test = new ClhsdbLauncher();

            theApp = LingeredApp.startApp();
            System.out.println("Started LingeredApp with pid " + theApp.getPid());

            // Run "dumpclass jdk/test/lib/apps/LingeredApp"
            String cmd = "dumpclass " + APP_DOT_CLASSNAME;
            List<String> cmds = List.of(cmd);
            Map<String, List<String>> unExpStrMap = new HashMap<>();
            unExpStrMap.put(cmd, List.of("class not found"));
            test.run(theApp.getPid(), cmds, null, unExpStrMap);
            File classFile = new File(APP_SLASH_CLASSNAME + ".class");
            if (!classFile.exists()) {
                throw new RuntimeException("FAILED: Cannot find dumped .class file");
            }

            // Run javap on the generated class file to make sure it's valid.
            JDKToolLauncher launcher = JDKToolLauncher.createUsingTestJDK("javap");
            launcher.addVMArgs(Utils.getTestJavaOpts());
            // Let javap print additional info, e.g., StackMapTable
            launcher.addToolArg("-verbose");
            launcher.addToolArg(classFile.toString());
            System.out.println("> javap " + classFile.toString());
            List<String> cmdStringList = Arrays.asList(launcher.getCommand());
            ProcessBuilder pb = new ProcessBuilder(cmdStringList);
            Process javap = pb.start();
            OutputAnalyzer out = new OutputAnalyzer(javap);
            javap.waitFor();
            System.out.println(out.getStdout());
            System.err.println(out.getStderr());
            out.shouldHaveExitValue(0);
            out.shouldMatch("public class " + APP_DOT_CLASSNAME);
            // StackMapTable might not be generated for a class
            // containing only methods with sequential control flows.
            // But the class used here (LingeredApp) is not such a case.
            out.shouldContain("StackMapTable:");
            out.shouldContain("BootstrapMethods:");
            out.shouldNotContain("Error:");
        } catch (SkippedException se) {
            throw se;
        } catch (Exception ex) {
            throw new RuntimeException("Test ERROR " + ex, ex);
        } finally {
            LingeredApp.stopApp(theApp);
        }
        System.out.println("Test PASSED");
    }
}