/*

 * Copyright (c) 2018, 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.gc.g1.G1CollectedHeap;

import sun.jvm.hotspot.gc.g1.HeapRegion;

import sun.jvm.hotspot.HotSpotAgent;

import sun.jvm.hotspot.runtime.VM;

import jdk.test.lib.apps.LingeredApp;

import jdk.test.lib.Asserts;

import jdk.test.lib.Platform;

import jdk.test.lib.process.OutputAnalyzer;

import jdk.test.lib.process.ProcessTools;

import jdk.test.lib.Utils;

/*

 * @test

 * @library /test/lib

 * @requires os.family != "mac"

 * @modules jdk.hotspot.agent/sun.jvm.hotspot

 *          jdk.hotspot.agent/sun.jvm.hotspot.gc.g1

 *          jdk.hotspot.agent/sun.jvm.hotspot.memory

 *          jdk.hotspot.agent/sun.jvm.hotspot.runtime

 * @run main/othervm TestG1HeapRegion

 */

public class TestG1HeapRegion {

    private static LingeredApp theApp = null;

    private static void checkHeapRegion(String pid) throws Exception {

        HotSpotAgent agent = new HotSpotAgent();

        try {

            agent.attach(Integer.parseInt(pid));

            G1CollectedHeap heap = (G1CollectedHeap)VM.getVM().getUniverse().heap();

            HeapRegion hr = heap.hrm().heapRegionIterator().next();

            HeapRegion hrTop = heap.hrm().getByAddress(hr.top());

            Asserts.assertEquals(hr.top(), hrTop.top(),

                                 "Address of HeapRegion does not match.");

        } finally {

            agent.detach();

        }

    }

    private static void createAnotherToAttach(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.gc.g1=ALL-UNNAMED",

            "--add-exports=jdk.hotspot.agent/sun.jvm.hotspot.memory=ALL-UNNAMED",

            "--add-exports=jdk.hotspot.agent/sun.jvm.hotspot.runtime=ALL-UNNAMED",

            "TestG1HeapRegion",

            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());

    }

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

        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.add("-XX:+UseG1GC");

                vmArgs.addAll(Utils.getVmOptions());

                theApp = new LingeredApp();

                LingeredApp.startApp(vmArgs, theApp);

                createAnotherToAttach(theApp.getPid());

            } finally {

                LingeredApp.stopApp(theApp);

            }

        } else {

            checkHeapRegion(args[0]);

        }

    }

}