test/jdk/com/sun/jdi/JdwpAttachTest.java
author amenkov
Thu, 31 Oct 2019 14:23:06 -0700
changeset 58876 1a8d65e71a66
parent 54884 8a6093c186a6
permissions -rw-r--r--
8224159: JDWP IPv6 scope support Reviewed-by: sspitsyn, cjplummer
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/*
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 * Copyright (c) 2019, Oracle and/or its affiliates. All rights reserved.
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 *
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 * This code is free software; you can redistribute it and/or modify it
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 * under the terms of the GNU General Public License version 2 only, as
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 * published by the Free Software Foundation.
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 *
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 * This code is distributed in the hope that it will be useful, but WITHOUT
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 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
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 * version 2 for more details (a copy is included in the LICENSE file that
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 * accompanied this code).
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 *
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 * You should have received a copy of the GNU General Public License version
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 * 2 along with this work; if not, write to the Free Software Foundation,
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 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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 *
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 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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 * or visit www.oracle.com if you need additional information or have any
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 * questions.
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 */
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import com.sun.jdi.Bootstrap;
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import com.sun.jdi.VirtualMachine;
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import com.sun.jdi.connect.Connector;
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import com.sun.jdi.connect.ListeningConnector;
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import jdk.test.lib.apps.LingeredApp;
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import java.net.Inet4Address;
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import java.net.Inet6Address;
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import java.net.InetAddress;
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import java.net.NetworkInterface;
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import java.net.SocketException;
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import java.net.UnknownHostException;
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import java.util.Arrays;
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import java.util.Enumeration;
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import java.util.Iterator;
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import java.util.LinkedList;
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import java.util.List;
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import java.util.Map;
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import java.util.concurrent.Callable;
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import java.util.concurrent.ExecutorService;
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import java.util.concurrent.Executors;
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/*
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 * @test
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 * @bug 8184770
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 * @summary Tests for JDWP agent attach functionality (including IPv6 support)
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 * @library /test/lib
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 *
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 * @build HelloWorld JdwpAttachTest
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 * @run main/othervm JdwpAttachTest
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 */
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public class JdwpAttachTest {
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    private static final boolean IsWindows = System.getProperty("os.name").toLowerCase().contains("windows");
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    // Set to true to perform testing of attach from wrong address (expected to fail).
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    // It's off by default as it caused significant test time increase\
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    // (tests <number_of_addresses> * <number_of_addresses> cases, each case fails by timeout).
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    private static boolean testFailedAttach = false;
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    public static void main(String[] args) throws Exception {
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        List<InetAddress> addresses = getAddresses();
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        boolean ipv4EnclosedTested = false;
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        boolean ipv6EnclosedTested = false;
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        for (InetAddress addr: addresses) {
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            if (testFailedAttach) {
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                for (InetAddress connectAddr : addresses) {
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                    attachTest(addr.getHostAddress(), connectAddr.getHostAddress(), addr.equals(connectAddr));
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                }
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            } else {
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                attachTest(addr.getHostAddress(), addr.getHostAddress(), true);
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            }
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            // listening on "*" should accept connections from all addresses
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            attachTest("*", addr.getHostAddress(), true);
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            // also test that addresses enclosed in square brackets are supported.
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            if (addr instanceof Inet4Address && !ipv4EnclosedTested) {
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                attachTest("[" + addr.getHostAddress() + "]", "[" + addr.getHostAddress() + "]", true);
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                ipv4EnclosedTested = true;
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            }
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            if (addr instanceof Inet6Address && !ipv6EnclosedTested) {
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                attachTest("[" + addr.getHostAddress() + "]", "[" + addr.getHostAddress() + "]", true);
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                ipv6EnclosedTested = true;
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            }
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        }
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        // by using "localhost" or empty hostname
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        // we should be able to attach to both IPv4 and IPv6 addresses (127.0.0.1 & ::1)
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        InetAddress localAddresses[] = InetAddress.getAllByName("localhost");
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        for (int i = 0; i < localAddresses.length; i++) {
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            attachTest(localAddresses[i].getHostAddress(), "", true);
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        }
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    }
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    private static void attachTest(String listenAddress, String connectAddress, boolean expectedResult)
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            throws Exception {
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        log("\nTest: listen on '" + listenAddress + "', attach to '" + connectAddress + "'");
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        log("  Starting listening at " + listenAddress);
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        ListeningConnector connector = getListenConnector();
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        Map<String, Connector.Argument> args = connector.defaultArguments();
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        setConnectorArg(args, "localAddress", listenAddress);
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        setConnectorArg(args, "port", "0");
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        String actualAddress = connector.startListening(args);
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        String actualPort = actualAddress.substring(actualAddress.lastIndexOf(':') + 1);
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        String port = args.get("port").value();
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        // port from connector.startListening must be the same as values from arguments
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        if (!port.equals(actualPort)) {
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            throw new RuntimeException("values from connector.startListening (" + actualPort
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                    + " is not equal to values from arguments (" + port + ")");
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        }
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        log("  Listening port: " + port);
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        log("  Attaching from " + connectAddress);
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        try {
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            ExecutorService executor = Executors.newSingleThreadExecutor();
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            executor.submit((Callable<Exception>)() -> {
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                VirtualMachine vm = connector.accept(args);
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                vm.dispose();
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                return null;
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            });
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            executor.shutdown();
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            try {
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                LingeredApp debuggee = LingeredApp.startApp(
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                        Arrays.asList("-agentlib:jdwp=transport=dt_socket"
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                                + ",address=" + connectAddress + ":" + port
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                                + ",server=n,suspend=n"
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                                // if failure is expected set small timeout (default is 20 sec)
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                                + (!expectedResult ? ",timeout=1000" : "")));
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                debuggee.stopApp();
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                if (expectedResult) {
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                    log("OK: attached as expected");
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                } else {
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                    throw new RuntimeException("ERROR: LingeredApp.startApp was able to attach");
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                }
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            } catch (Exception ex) {
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                if (expectedResult) {
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                    throw new RuntimeException("ERROR: LingeredApp.startApp was able to attach");
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                } else {
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                    log("OK: failed to attach as expected");
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                }
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            }
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        } finally {
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            connector.stopListening(args);
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        }
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    }
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    private static void addAddr(List<InetAddress> list, InetAddress addr) {
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        log(" - (" + addr.getClass().getSimpleName() + ") " + addr.getHostAddress());
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        list.add(addr);
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    }
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    private static List<InetAddress> getAddresses() {
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        List<InetAddress> result = new LinkedList<>();
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        try {
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            Enumeration<NetworkInterface> networkInterfaces = NetworkInterface.getNetworkInterfaces();
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            while (networkInterfaces.hasMoreElements()) {
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                NetworkInterface iface = networkInterfaces.nextElement();
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                try {
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                    if (iface.isUp()) {
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                        Enumeration<InetAddress> addresses = iface.getInetAddresses();
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                        while (addresses.hasMoreElements()) {
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                            InetAddress addr = addresses.nextElement();
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                            // Java reports link local addresses with symbolic scope,
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                            // but on Windows java.net.NetworkInterface generates its own scope names
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                            // which are incompatible with native Windows routines.
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                            // So on Windows test only addresses with numeric scope.
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                            // On other platforms test both symbolic and numeric scopes.
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                            if (addr instanceof Inet6Address) {
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                                Inet6Address addr6 = (Inet6Address)addr;
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                                NetworkInterface scopeIface = addr6.getScopedInterface();
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                                if (scopeIface != null && scopeIface.getName() != null) {
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                                    // On some test machines VPN creates link local addresses
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                                    // which we cannot connect to.
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                                    // Skip them.
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                                    if (scopeIface.isPointToPoint()) {
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                                        continue;
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                                    }
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                                    try {
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                                        // the same address with numeric scope
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                                        addAddr(result, Inet6Address.getByAddress(null, addr6.getAddress(), addr6.getScopeId()));
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                                    } catch (UnknownHostException e) {
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                                        // cannot happen!
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                                        throw new RuntimeException("Unexpected", e);
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                                    }
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                                    if (IsWindows) {
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                                        // don't add addresses with symbolic scope
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                                        continue;
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                                    }
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                                }
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                            }
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                            addAddr(result, addr);
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                        }
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                    }
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                } catch (SocketException e) {
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                    log("Interface " + iface.getDisplayName() + ": failed to get addresses");
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                }
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            }
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        } catch (SocketException e) {
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            log("Interface enumeration error: " + e);
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        }
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        return result;
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    }
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    private static String LISTEN_CONNECTOR = "com.sun.jdi.SocketListen";
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    private static ListeningConnector getListenConnector() {
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        return (ListeningConnector)getConnector(LISTEN_CONNECTOR);
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    }
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    private static Connector getConnector(String name) {
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        List<Connector> connectors = Bootstrap.virtualMachineManager().allConnectors();
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        for (Iterator<Connector> iter = connectors.iterator(); iter.hasNext(); ) {
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            Connector connector = iter.next();
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            if (connector.name().equalsIgnoreCase(name)) {
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                return connector;
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            }
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        }
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        throw new IllegalArgumentException("Connector " + name + " not found");
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    }
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    private static void setConnectorArg(Map<String, Connector.Argument> args, String name, String value) {
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        Connector.Argument arg = args.get(name);
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        if (arg == null) {
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            throw new IllegalArgumentException("Argument " + name + " is not defined");
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        }
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        arg.setValue(value);
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    }
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    private static long startTime = System.currentTimeMillis();
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    private static void log(Object o) {
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        long time = System.currentTimeMillis() - startTime;
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        System.out.println(String.format("[%7.3f] %s", (time / 1000f), String.valueOf(o)));
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    }
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}