/*

 * Copyright (c) 2017, 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.

 *

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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;

import jdk.test.lib.Utils;

/*

 * @test

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

 * @bug 8190307

 * @library /test/lib

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

 * @run main/othervm TestIntConstant

 */

public class TestIntConstant {

    private static void testClhsdbForIntConstant(

                        long lingeredAppPid,

                        String commandString,

                        String[] expectedOutputStrings) 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());

        pb.redirectError(ProcessBuilder.Redirect.INHERIT);

        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 'intConstant' inputs at the clhsdb prompt.

        OutputStream input = p.getOutputStream();

        try {

            input.write((commandString + "\n").getBytes());

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

            input.flush();

        } catch (IOException ioe) {

            throw new Error("Problem issuing the intConstant command: " +

                            commandString + ioe);

        }

        OutputAnalyzer output = new OutputAnalyzer(p);

        System.out.println("Awaiting process completion");

        try {

            p.waitFor();

        } catch (InterruptedException ie) {

            p.destroyForcibly();

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

        }

        output.shouldHaveExitValue(0);

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

        for (String expectedOutputString: expectedOutputStrings) {

            output.shouldContain(expectedOutputString);

        }

    }

    public static void testIntConstant() throws Exception {

        LingeredApp app = null;

        try {

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

            vmArgs.addAll(Utils.getVmOptions());

            app = LingeredApp.startApp(vmArgs);

            System.out.println ("Started LingeredApp with pid " + app.getPid());

            // Strings to check for in the output of 'intConstant'. The

            // 'intConstant' command prints out entries from the

            // 'gHotSpotVMIntConstants', which is a table of integer constants,

            // with names and the values derived from enums and #define preprocessor

            // macros in hotspot.

            String[] defaultOutputStrings =

                {"CollectedHeap::G1CollectedHeap 2",

                 "RUNNABLE 2",

                 "Deoptimization::Reason_class_check 4",

                 "InstanceKlass::_misc_is_anonymous 32",

                 "Generation::ParNew 1",

                 "_thread_uninitialized 0"};

            String[] tempConstantString = {"intConstant _temp_constant 45"};

            testClhsdbForIntConstant(app.getPid(), "intConstant", defaultOutputStrings);

            testClhsdbForIntConstant(

                app.getPid(),

                "intConstant _temp_constant 45\nintConstant _temp_constant",

                tempConstantString);

          } 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 {

            testIntConstant();

        } catch (Exception e) {

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

        }

    }

}