| /* |
| * Copyright (c) 2003, 2013, 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 4531526 |
| * @summary Test that more than one debuggee cannot bind to same port |
| * at the same time. |
| * |
| * @build VMConnection ExclusiveBind HelloWorld |
| * @run main ExclusiveBind |
| */ |
| import java.io.InputStream; |
| import java.io.IOException; |
| import java.io.File; |
| import java.net.ServerSocket; |
| import com.sun.jdi.Bootstrap; |
| import com.sun.jdi.VirtualMachine; |
| 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 ExclusiveBind { |
| |
| /* |
| * Helper class to direct process output to the parent |
| * System.out |
| */ |
| static class IOHandler implements Runnable { |
| InputStream in; |
| |
| IOHandler(InputStream in) { |
| this.in = in; |
| } |
| |
| static void handle(InputStream in) { |
| IOHandler handler = new IOHandler(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); |
| if (n < 0) return; |
| for (int i=0; i<n; i++) { |
| System.out.print((char)b[i]); |
| } |
| } |
| } catch (IOException ioe) { } |
| } |
| |
| } |
| |
| /* |
| * 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 (in server mode) a debuggee with the given address and |
| * suspend mode. |
| */ |
| private static Process launch(String address, boolean suspend, String class_name) throws IOException { |
| String exe = System.getProperty("java.home") + File.separator + "bin" + |
| File.separator + "java"; |
| String cmd = exe + " " + VMConnection.getDebuggeeVMOptions() + |
| " -agentlib:jdwp=transport=dt_socket,server=y,suspend="; |
| if (suspend) { |
| cmd += "y"; |
| } else { |
| cmd += "n"; |
| } |
| cmd += ",address=" + address + " " + class_name; |
| |
| System.out.println("Starting: " + cmd); |
| |
| Process p = Runtime.getRuntime().exec(cmd); |
| IOHandler.handle(p.getInputStream()); |
| IOHandler.handle(p.getErrorStream()); |
| |
| return p; |
| } |
| |
| /* |
| * - pick a TCP port |
| * - Launch a debuggee in server=y,suspend=y,address=${port} |
| * - Launch a second debuggee in server=y,suspend=n with the same port |
| * - Second debuggee should fail with an error (address already in use) |
| * - For clean-up we attach to the first debuggee and resume it. |
| */ |
| 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 first debuggee |
| Process process1 = launch(address, true, "HelloWorld"); |
| |
| // give first debuggee time to suspend |
| Thread.currentThread().sleep(5000); |
| |
| // launch a second debuggee with the same address |
| Process process2 = launch(address, false, "HelloWorld"); |
| |
| // get exit status from second debuggee |
| int exitCode = process2.waitFor(); |
| |
| // clean-up - attach to first debuggee and resume it |
| 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); |
| vm.resume(); |
| |
| // if the second debuggee ran to completion then we've got a problem |
| if (exitCode == 0) { |
| throw new RuntimeException("Test failed - second debuggee didn't fail to bind"); |
| } else { |
| System.out.println("Test passed - second debuggee correctly failed to bind"); |
| } |
| } |
| } |