/*

 * Copyright 2004-2006 Sun Microsystems, Inc.  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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,

 * CA 95054 USA or visit www.sun.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

 *

 * @build VMConnection RunToExit Exit0

 * @run main RunToExit

 */

import java.io.InputStream;

import java.io.IOException;

import java.io.File;

import java.io.BufferedInputStream;

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.util.Map;

import java.util.List;

import java.util.Iterator;

public class RunToExit {

    /* Increment this when ERROR: seen */

    static int error_seen = 0;

    static volatile boolean ready = false;

    /*

     * Helper class to direct process output to a StringBuffer

     */

    static class IOHandler implements Runnable {

        private String              name;

        private BufferedInputStream in;

        private StringBuffer        buffer;

        IOHandler(String name, InputStream in) {

            this.name = name;

            this.in = new BufferedInputStream(in);

            this.buffer = new StringBuffer();

        }

        static void handle(String name, InputStream in) {

            IOHandler handler = new IOHandler(name, in);

            Thread thr = new Thread(handler);

            thr.setDaemon(true);

            thr.start();

        }

        public void run() {

            try {

                byte b[] = new byte[100];

                for (;;) {

                    int n = in.read(b, 0, 100);

                    // The first thing that will get read is

                    //    Listening for transport dt_socket at address: xxxxx

                    // which shows the debuggee is ready to accept connections.

                    ready = true;

                    if (n < 0) {

                        break;

                    }

                    buffer.append(new String(b, 0, n));

                }

            } catch (IOException ioe) { }

            String str = buffer.toString();

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

                error_seen++;

            }

            System.out.println(name + ": " + str);

        }

    }

    /*

     * 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 IOException {

        String exe =   System.getProperty("java.home")

                     + File.separator + "bin" + File.separator;

        String arch = System.getProperty("os.arch");

        if (arch.equals("sparcv9")) {

            exe += "sparcv9/java";

        } else {

            exe += "java";

        }

        String cmd = exe + " " + VMConnection.getDebuggeeVMOptions() +

            " -agentlib:jdwp=transport=dt_socket" +

            ",server=y" + ",suspend=y" + ",address=" + address +

            " " + class_name;

        System.out.println("Starting: " + cmd);

        Process p = Runtime.getRuntime().exec(cmd);

        IOHandler.handle("Input Stream", p.getInputStream());

        IOHandler.handle("Error Stream", p.getErrorStream());

        return p;

    }

    /*

     * - 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");

        // wait for the debugge to be ready

        while (!ready) {

            try {

                Thread.sleep(1000);

            } catch(Exception ee) {

                throw ee;

            }

        }

        // 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);

        VirtualMachine vm = conn.attach(conn_args);

        // 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");

        }

    }

}