/*
* 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");
}
}
}