/*
* Copyright (c) 1999, 2008, 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. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* 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
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*/
package com.sun.tools.jdi;
import com.sun.tools.jdi.*;
import com.sun.jdi.connect.*;
import com.sun.jdi.connect.spi.*;
import com.sun.jdi.*;
import java.util.Map;
import java.util.StringTokenizer;
import java.util.List;
import java.util.ArrayList;
import java.io.IOException;
import java.io.InterruptedIOException;
abstract class AbstractLauncher extends ConnectorImpl implements LaunchingConnector {
abstract public VirtualMachine
launch(Map<String,? extends Connector.Argument> arguments)
throws IOException,
IllegalConnectorArgumentsException,
VMStartException;
abstract public String name();
abstract public String description();
ThreadGroup grp;
AbstractLauncher() {
super();
grp = Thread.currentThread().getThreadGroup();
ThreadGroup parent = null;
while ((parent = grp.getParent()) != null) {
grp = parent;
}
}
String[] tokenizeCommand(String command, char quote) {
String quoteStr = String.valueOf(quote); // easier to deal with
/*
* Tokenize the command, respecting the given quote character.
*/
StringTokenizer tokenizer = new StringTokenizer(command,
quote + " \t\r\n\f",
true);
String quoted = null;
String pending = null;
List<String> tokenList = new ArrayList<String>();
while (tokenizer.hasMoreTokens()) {
String token = tokenizer.nextToken();
if (quoted != null) {
if (token.equals(quoteStr)) {
tokenList.add(quoted);
quoted = null;
} else {
quoted += token;
}
} else if (pending != null) {
if (token.equals(quoteStr)) {
quoted = pending;
} else if ((token.length() == 1) &&
Character.isWhitespace(token.charAt(0))) {
tokenList.add(pending);
} else {
throw new InternalException("Unexpected token: " + token);
}
pending = null;
} else {
if (token.equals(quoteStr)) {
quoted = "";
} else if ((token.length() == 1) &&
Character.isWhitespace(token.charAt(0))) {
// continue
} else {
pending = token;
}
}
}
/*
* Add final token.
*/
if (pending != null) {
tokenList.add(pending);
}
/*
* An unclosed quote at the end of the command. Do an
* implicit end quote.
*/
if (quoted != null) {
tokenList.add(quoted);
}
String[] tokenArray = new String[tokenList.size()];
for (int i = 0; i < tokenList.size(); i++) {
tokenArray[i] = tokenList.get(i);
}
return tokenArray;
}
protected VirtualMachine launch(String[] commandArray, String address,
TransportService.ListenKey listenKey,
TransportService ts)
throws IOException, VMStartException {
Helper helper = new Helper(commandArray, address, listenKey, ts);
helper.launchAndAccept();
VirtualMachineManager manager =
Bootstrap.virtualMachineManager();
return manager.createVirtualMachine(helper.connection(),
helper.process());
}
/**
* This class simply provides a context for a single launch and
* accept. It provides instance fields that can be used by
* all threads involved. This stuff can't be in the Connector proper
* because the connector is is a singleton and not specific to any
* one launch.
*/
private class Helper {
private final String address;
private TransportService.ListenKey listenKey;
private TransportService ts;
private final String[] commandArray;
private Process process = null;
private Connection connection = null;
private IOException acceptException = null;
private boolean exited = false;
Helper(String[] commandArray, String address, TransportService.ListenKey listenKey,
TransportService ts) {
this.commandArray = commandArray;
this.address = address;
this.listenKey = listenKey;
this.ts = ts;
}
String commandString() {
String str = "";
for (int i = 0; i < commandArray.length; i++) {
if (i > 0) {
str += " ";
}
str += commandArray[i];
}
return str;
}
synchronized void launchAndAccept() throws
IOException, VMStartException {
process = Runtime.getRuntime().exec(commandArray);
Thread acceptingThread = acceptConnection();
Thread monitoringThread = monitorTarget();
try {
while ((connection == null) &&
(acceptException == null) &&
!exited) {
wait();
}
if (exited) {
throw new VMStartException(
"VM initialization failed for: " + commandString(), process);
}
if (acceptException != null) {
// Rethrow the exception in this thread
throw acceptException;
}
} catch (InterruptedException e) {
throw new InterruptedIOException("Interrupted during accept");
} finally {
acceptingThread.interrupt();
monitoringThread.interrupt();
}
}
Process process() {
return process;
}
Connection connection() {
return connection;
}
synchronized void notifyOfExit() {
exited = true;
notify();
}
synchronized void notifyOfConnection(Connection connection) {
this.connection = connection;
notify();
}
synchronized void notifyOfAcceptException(IOException acceptException) {
this.acceptException = acceptException;
notify();
}
Thread monitorTarget() {
Thread thread = new Thread(grp,
"launched target monitor") {
public void run() {
try {
process.waitFor();
/*
* Notify waiting thread of VM error termination
*/
notifyOfExit();
} catch (InterruptedException e) {
// Connection has been established, stop monitoring
}
}
};
thread.setDaemon(true);
thread.start();
return thread;
}
Thread acceptConnection() {
Thread thread = new Thread(grp,
"connection acceptor") {
public void run() {
try {
Connection connection = ts.accept(listenKey, 0, 0);
/*
* Notify waiting thread of connection
*/
notifyOfConnection(connection);
} catch (InterruptedIOException e) {
// VM terminated, stop accepting
} catch (IOException e) {
// Report any other exception to waiting thread
notifyOfAcceptException(e);
}
}
};
thread.setDaemon(true);
thread.start();
return thread;
}
}
}