/*

 * Copyright (c) 2004, 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.

 */

/* @test

 * @bug 4997445

 * @summary Test that with server=y, when VM runs to System.exit() no error happens

 * @library /test/lib

 * @modules java.management

 *          jdk.jdi

 * @build VMConnection RunToExit Exit0

 * @run driver RunToExit

 */

import java.net.ServerSocket;

import com.sun.jdi.Bootstrap;

import com.sun.jdi.VirtualMachine;

import com.sun.jdi.event.*;

import com.sun.jdi.connect.Connector;

import com.sun.jdi.connect.AttachingConnector;

import java.net.ConnectException;

import java.util.Map;

import java.util.List;

import java.util.Iterator;

import java.util.concurrent.TimeUnit;

import java.util.stream.Collectors;

import jdk.test.lib.process.ProcessTools;

public class RunToExit {

    /* Increment this when ERROR: seen */

    static volatile int error_seen = 0;

    static volatile boolean ready = false;

    /*

     * Find a connector by name

     */

    private static Connector findConnector(String name) {

        List connectors = Bootstrap.virtualMachineManager().allConnectors();

        Iterator iter = connectors.iterator();

        while (iter.hasNext()) {

            Connector connector = (Connector)iter.next();

            if (connector.name().equals(name)) {

                return connector;

            }

        }

        return null;

    }

    /*

     * Launch a server debuggee with the given address

     */

    private static Process launch(String address, String class_name) throws Exception {

        String args[] = new String[]{

            "-agentlib:jdwp=transport=dt_socket,server=y,suspend=y,address="

                + address,

            class_name

        };

        args = VMConnection.insertDebuggeeVMOptions(args);

        ProcessBuilder launcher = ProcessTools.createJavaProcessBuilder(args);

        System.out.println(launcher.command().stream().collect(Collectors.joining(" ", "Starting: ", "")));

        Process p = ProcessTools.startProcess(

            class_name,

            launcher,

            RunToExit::checkForError,

            RunToExit::isTransportListening,

            0,

            TimeUnit.NANOSECONDS

        );

        return p;

    }

    private static boolean isTransportListening(String line) {

        return line.startsWith("Listening for transport dt_socket");

    }

    private static void checkForError(String line) {

        if (line.contains("ERROR:")) {

            error_seen++;

        }

    }

    /*

     * - pick a TCP port

     * - Launch a server debuggee: server=y,suspend=y,address=${port}

     * - run it to VM death

     * - verify we saw no error

     */

    public static void main(String args[]) throws Exception {

        // find a free port

        ServerSocket ss = new ServerSocket(0);

        int port = ss.getLocalPort();

        ss.close();

        String address = String.valueOf(port);

        // launch the server debuggee

        Process process = launch(address, "Exit0");

        // attach to server debuggee and resume it so it can exit

        AttachingConnector conn = (AttachingConnector)findConnector("com.sun.jdi.SocketAttach");

        Map conn_args = conn.defaultArguments();

        Connector.IntegerArgument port_arg =

            (Connector.IntegerArgument)conn_args.get("port");

        port_arg.setValue(port);

        System.out.println("Connection arguments: " + conn_args);

        VirtualMachine vm = null;

        while (vm == null) {

            try {

                vm = conn.attach(conn_args);

            } catch (ConnectException e) {

                e.printStackTrace(System.out);

                System.out.println("--- Debugee not ready. Retrying in 500ms. ---");

                Thread.sleep(500);

            }

        }

        // The first event is always a VMStartEvent, and it is always in

        // an EventSet by itself.  Wait for it.

        EventSet evtSet = vm.eventQueue().remove();

        for (Event event: evtSet) {

            if (event instanceof VMStartEvent) {

                break;

            }

            throw new RuntimeException("Test failed - debuggee did not start properly");

        }

        vm.eventRequestManager().deleteAllBreakpoints();

        vm.resume();

        int exitCode = process.waitFor();

        // if the server debuggee ran cleanly, we assume we were clean

        if (exitCode == 0 && error_seen == 0) {

            System.out.println("Test passed - server debuggee cleanly terminated");

        } else {

            throw new RuntimeException("Test failed - server debuggee generated an error when it terminated, " +

                "exit code was " + exitCode + ", " + error_seen + " error(s) seen in debugee output.");

        }

    }

}