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 *

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 * published by the Free Software Foundation.

 *

 * This code is distributed in the hope that it will be useful, but WITHOUT

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 * 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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 */

/* @test

 * @bug 6306165 6432567

 * @summary Check that a bad handshake doesn't cause a debuggee to abort

 * @library /lib/testlibrary

 *

 * @build VMConnection BadHandshakeTest Exit0

 * @run main BadHandshakeTest

 *

 */

import java.net.Socket;

import java.net.InetAddress;

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;

import java.util.concurrent.TimeUnit;

import java.util.concurrent.atomic.AtomicBoolean;

import jdk.testlibrary.Utils;

import jdk.testlibrary.ProcessTools;

public class BadHandshakeTest {

    /*

     * 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 = VMConnection.insertDebuggeeVMOptions(new String[] {

            "-agentlib:jdwp=transport=dt_socket" +

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

            class_name

        });

        ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(args);

        final AtomicBoolean success = new AtomicBoolean();

        Process p = ProcessTools.startProcess(

            class_name,

            pb,

            (line) -> {

                // 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.

                success.set(line.contains("Listening for transport dt_socket at address:"));

                return true;

            },

            TimeUnit.MILLISECONDS

        );

        return success.get() ? p : null;

    }

    /*

     * - 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 {

        int port = Utils.getFreePort();

        String address = String.valueOf(port);

        // launch the server debuggee

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

        if (process == null) {

            throw new RuntimeException("Unable to start debugee");

        }

        // Connect to the debuggee and handshake with garbage

        Socket s = new Socket(InetAddress.getLocalHost(), port);

        s.getOutputStream().write("Here's a poke in the eye".getBytes("UTF-8"));

        s.close();

        // Re-connect and to a partial handshake - don't disconnect

        s = new Socket(InetAddress.getLocalHost(), port);

        s.getOutputStream().write("JDWP-".getBytes("UTF-8"));

        // 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();

        process.waitFor();

    }

}