/test/com/sun/jdi/ExclusiveBind.java
Java | 171 lines | 96 code | 20 blank | 55 comment | 16 complexity | 1caca1e0c48bc82dab6253105b852364 MD5 | raw file
- /*
- * Copyright (c) 2003, 2006, 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;
- String arch = System.getProperty("os.arch");
- String osname = System.getProperty("os.name");
- if (osname.equals("SunOS") && arch.equals("sparcv9")) {
- exe += "sparcv9/java";
- } else if (osname.equals("SunOS") && arch.equals("amd64")) {
- exe += "amd64/java";
- } else {
- exe += "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");
- }
- }
- }