/*
 * Copyright (c) 2015, 2016, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
 * or visit www.oracle.com if you need additional information or have any
 * questions.
 */

import java.util.ArrayList;
import java.util.List;

import sun.jvm.hotspot.HotSpotAgent;
import sun.jvm.hotspot.utilities.SystemDictionaryHelper;
import sun.jvm.hotspot.oops.InstanceKlass;
import sun.jvm.hotspot.debugger.*;
import sun.jvm.hotspot.oops.Method;
import sun.jvm.hotspot.utilities.MethodArray;

import jdk.test.lib.apps.LingeredApp;
import jdk.test.lib.JDKToolLauncher;
import jdk.test.lib.JDKToolFinder;
import jdk.test.lib.Platform;
import jdk.test.lib.process.ProcessTools;
import jdk.test.lib.process.OutputAnalyzer;
import jdk.test.lib.Utils;
import jdk.test.lib.Asserts;

/*
 * @test
 * @library /test/lib
 * @requires os.family != "mac"
 * @modules java.base/jdk.internal.misc
 *          jdk.hotspot.agent/sun.jvm.hotspot
 *          jdk.hotspot.agent/sun.jvm.hotspot.utilities
 *          jdk.hotspot.agent/sun.jvm.hotspot.oops
 *          jdk.hotspot.agent/sun.jvm.hotspot.debugger
 * @run main/othervm TestDefaultMethods
 */

public class TestDefaultMethods {

    private static LingeredAppWithDefaultMethods theApp = null;

    private static void printDefaultMethods(String pid,
                                            String[] instanceKlassNames) {
        HotSpotAgent agent = new HotSpotAgent();
        try {
            agent.attach(Integer.parseInt(pid));
        }
        catch (DebuggerException e) {
            System.out.println(e.getMessage());
            System.err.println("Unable to connect to process ID: " + pid);

            agent.detach();
            e.printStackTrace();
        }

        for (String instanceKlassName : instanceKlassNames) {
            InstanceKlass iKlass = SystemDictionaryHelper.findInstanceKlass(instanceKlassName);
            MethodArray methods = iKlass.getMethods();
            MethodArray defaultMethods = iKlass.getDefaultMethods();
            for (int i = 0; i < methods.length(); i++) {
                Method m = methods.at(i);
                System.out.println("Method: " + m.getName().asString() +
                                   " in instance klass: " + instanceKlassName);
            }
            if (defaultMethods != null) {
                for (int j = 0; j < defaultMethods.length(); j++) {
                    Method dm = defaultMethods.at(j);
                    System.out.println("Default method: " + dm.getName().asString() +
                                       " in instance klass: " + instanceKlassName);
                }
            } else {
                System.out.println("No default methods in " + instanceKlassName);
            }

        }
        agent.detach();
    }

    private static void createAnotherToAttach(
                            String[] instanceKlassNames,
                            long lingeredAppPid) throws Exception {

        String[] toolArgs = {
            "--add-modules=jdk.hotspot.agent",
            "--add-exports=jdk.hotspot.agent/sun.jvm.hotspot=ALL-UNNAMED",
            "--add-exports=jdk.hotspot.agent/sun.jvm.hotspot.utilities=ALL-UNNAMED",
            "--add-exports=jdk.hotspot.agent/sun.jvm.hotspot.oops=ALL-UNNAMED",
            "--add-exports=jdk.hotspot.agent/sun.jvm.hotspot.debugger=ALL-UNNAMED",
            "TestDefaultMethods",
            Long.toString(lingeredAppPid)
        };

        // Start a new process to attach to the lingered app
        ProcessBuilder processBuilder = ProcessTools.createJavaProcessBuilder(toolArgs);
        OutputAnalyzer SAOutput = ProcessTools.executeProcess(processBuilder);
        SAOutput.shouldHaveExitValue(0);
        System.out.println(SAOutput.getOutput());

        SAOutput.shouldContain(
            "Default method: hasScript in instance klass: " + instanceKlassNames[1]);
        SAOutput.shouldContain(
            "No default methods in " + instanceKlassNames[0]);
        SAOutput.shouldContain(
            "Method: hasScript in instance klass: " + instanceKlassNames[0]);
        SAOutput.shouldContain(
            "No default methods in " + instanceKlassNames[2]);
    }

    public static void main (String... args) throws Exception {

        String[] instanceKlassNames = new String[] {
                                          "Language",
                                          "ParselTongue",
                                          "SlytherinSpeak"
                                      };

        if (!Platform.shouldSAAttach()) {
            System.out.println(
               "SA attach not expected to work - test skipped.");
            return;
        }

        if (args == null || args.length == 0) {
            try {
                List<String> vmArgs = new ArrayList<String>();
                vmArgs.add("-XX:+UsePerfData");
                vmArgs.addAll(Utils.getVmOptions());

                theApp = new LingeredAppWithDefaultMethods();
                LingeredApp.startApp(vmArgs, theApp);
                createAnotherToAttach(instanceKlassNames,
                                      theApp.getPid());
            } finally {
                LingeredApp.stopApp(theApp);
            }
        } else {
            printDefaultMethods(args[0], instanceKlassNames);
        }
    }
}