/*

 * Copyright (c) 2017, 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

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 */

import sun.hotspot.code.Compiler;

import java.util.ArrayList;

import java.util.List;

import java.io.IOException;

import java.util.stream.Collectors;

import java.io.OutputStream;

import jdk.test.lib.apps.LingeredApp;

import jdk.test.lib.JDKToolLauncher;

import jdk.test.lib.Platform;

import jdk.test.lib.process.OutputAnalyzer;

/*

 * @test

 * @summary Test the 'universe' command of jhsdb clhsdb.

 * @bug 8190307

 * @library /test/lib

 * @build jdk.test.lib.apps.*

 * @build sun.hotspot.WhiteBox

 * @run driver ClassFileInstaller sun.hotspot.WhiteBox sun.hotspot.WhiteBox$WhiteBoxPermission

 * @run main/othervm -XX:+UnlockDiagnosticVMOptions -XX:+WhiteBoxAPI -Xbootclasspath/a:. TestUniverse

 */

public class TestUniverse {

    private static void testClhsdbForUniverse(long lingeredAppPid,

                                              String gc) throws Exception {

        Process p;

        JDKToolLauncher launcher = JDKToolLauncher.createUsingTestJDK("jhsdb");

        launcher.addToolArg("clhsdb");

        launcher.addToolArg("--pid");

        launcher.addToolArg(Long.toString(lingeredAppPid));

        ProcessBuilder pb = new ProcessBuilder();

        pb.command(launcher.getCommand());

        System.out.println(

            pb.command().stream().collect(Collectors.joining(" ")));

        try {

            p = pb.start();

        } catch (Exception attachE) {

            throw new Error("Couldn't start jhsdb or attach to LingeredApp : " + attachE);

        }

        // Issue the 'universe' command at the clhsdb prompt.

        OutputStream input = p.getOutputStream();

        try {

            input.write("universe\n".getBytes());

            input.write("quit\n".getBytes());

            input.flush();

        } catch (IOException ioe) {

            throw new Error("Problem issuing the 'universe' command ", ioe);

        }

        OutputAnalyzer output = new OutputAnalyzer(p);

        try {

            p.waitFor();

        } catch (InterruptedException ie) {

            p.destroyForcibly();

            throw new Error("Problem awaiting the child process: " + ie, ie);

        }

        output.shouldHaveExitValue(0);

        System.out.println(output.getOutput());

        output.shouldContain("Heap Parameters");

        if (gc.contains("G1GC")) {

            output.shouldContain("garbage-first heap");

            output.shouldContain("region size");

            output.shouldContain("G1 Young Generation:");

            output.shouldContain("regions  =");

        }

        if (gc.contains("UseConcMarkSweepGC")) {

            output.shouldContain("Gen 1: concurrent mark-sweep generation");

        }

        if (gc.contains("UseSerialGC")) {

            output.shouldContain("Gen 1:   old");

        }

        if (gc.contains("UseParallelGC")) {

            output.shouldContain("ParallelScavengeHeap");

            output.shouldContain("PSYoungGen");

            output.shouldContain("eden");

        }

        if (gc.contains("UseEpsilonGC")) {

            output.shouldContain("Epsilon heap");

            output.shouldContain("reserved");

            output.shouldContain("committed");

            output.shouldContain("used");

        }

    }

    public static void test(String gc) throws Exception {

        LingeredApp app = null;

        try {

            List<String> vmArgs = new ArrayList<String>();

            vmArgs.add("-XX:+UnlockExperimentalVMOptions"); // unlock experimental GCs

            vmArgs.add(gc);

            app = LingeredApp.startApp(vmArgs);

            System.out.println ("Started LingeredApp with the GC option " + gc +

                                " and pid " + app.getPid());

            testClhsdbForUniverse(app.getPid(), gc);

        } finally {

            LingeredApp.stopApp(app);

        }

    }

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

        if (!Platform.shouldSAAttach()) {

            System.out.println(

               "SA attach not expected to work - test skipped.");

            return;

        }

        try {

            test("-XX:+UseG1GC");

            test("-XX:+UseParallelGC");

            test("-XX:+UseSerialGC");

            if (!Compiler.isGraalEnabled()) { // Graal does not support CMS

              test("-XX:+UseConcMarkSweepGC");

            }

            test("-XX:+UseEpsilonGC");

        } catch (Exception e) {

            throw new Error("Test failed with " + e);

        }

    }

}