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/*******************************************************************************
* Copyright (c) 2000, 2007 QNX Software Systems and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* QNX Software Systems - Initial API and implementation
*******************************************************************************/
package org.eclipse.cdt.debug.mi.core;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.io.Reader;
import org.eclipse.cdt.utils.spawner.ProcessFactory;
import org.eclipse.cdt.utils.spawner.Spawner;
import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.core.runtime.OperationCanceledException;
/**
*/
public class MIProcessAdapter implements MIProcess {
Process fGDBProcess;
private static final int ONE_SECOND = 1000;
public MIProcessAdapter(String[] args, IProgressMonitor monitor) throws IOException {
this(args, 0, monitor);
}
public MIProcessAdapter(String[] args, int launchTimeout, IProgressMonitor monitor) throws IOException {
fGDBProcess = getGDBProcess(args, launchTimeout, monitor);
}
/**
* Do some basic synchronisation, gdb may take some time to load for
* whatever reasons and we need to be able to let the user bailout.
*
* @param args
* @return Process
* @throws IOException
*/
protected Process getGDBProcess(String[] args, int launchTimeout, IProgressMonitor monitor) throws IOException {
final Process pgdb = ProcessFactory.getFactory().exec(args);
Thread syncStartup = new Thread("GDB Start") { //$NON-NLS-1$
public void run() {
try {
String line;
InputStream stream = pgdb.getInputStream();
Reader r = new InputStreamReader(stream);
BufferedReader reader = new BufferedReader(r);
while ((line = reader.readLine()) != null) {
line = line.trim();
//System.out.println("GDB " + line);
if (line.endsWith("(gdb)")) { //$NON-NLS-1$
break;
}
}
} catch (Exception e) {
// Do nothing, ignore the errors
}
}
};
syncStartup.start();
int timepass = 0;
if (launchTimeout <= 0) {
// Simulate we are waiting forever.
launchTimeout = Integer.MAX_VALUE;
}
// To respect the IProgressMonitor we can not use wait/notify
// instead we have to loop and check for the monitor to allow to cancel the thread.
// The monitor is check every 1 second delay;
for (timepass = 0; timepass < launchTimeout; timepass += ONE_SECOND) {
if (syncStartup.isAlive() && !monitor.isCanceled()) {
try {
Thread.sleep(ONE_SECOND);
} catch (InterruptedException e) {
// ignore
}
} else {
break;
}
}
try {
syncStartup.interrupt();
syncStartup.join(ONE_SECOND);
} catch (InterruptedException e) {
// ignore
}
if (monitor.isCanceled()) {
pgdb.destroy();
throw new OperationCanceledException();
} else if (timepass > launchTimeout) {
pgdb.destroy();
String message = MIPlugin.getResourceString("src.GDBDebugger.Error_launch_timeout"); //$NON-NLS-1$
throw new IOException(message);
}
return pgdb;
}
public boolean canInterrupt(MIInferior inferior) {
return fGDBProcess instanceof Spawner;
}
public void interrupt(MIInferior inferior) {
if (fGDBProcess instanceof Spawner) {
Spawner gdbSpawner = (Spawner) fGDBProcess;
gdbSpawner.interrupt();
synchronized (inferior) {
// Allow (5 secs) for the interrupt to propagate.
for (int i = 0; inferior.isRunning() && i < 5; i++) {
try {
inferior.wait(1000);
} catch (InterruptedException e) {
}
}
}
// If we are still running try to drop the sig to the PID
if (inferior.isRunning() && inferior.getInferiorPID() > 0) {
// lets try something else.
interruptInferior(inferior);
}
}
}
/**
* Send an interrupt to the inferior process.
*
* @param inferior
*/
protected void interruptInferior(MIInferior inferior) {
if (fGDBProcess instanceof Spawner) {
Spawner gdbSpawner = (Spawner) fGDBProcess;
gdbSpawner.raise(inferior.getInferiorPID(), gdbSpawner.INT);
synchronized (inferior) {
for (int i = 0; inferior.isRunning() && i < 5; i++) {
try {
inferior.wait(1000);
} catch (InterruptedException e) {
}
}
}
}
}
public int exitValue() {
return fGDBProcess.exitValue();
}
public int waitFor() throws InterruptedException {
return fGDBProcess.waitFor();
}
public void destroy() {
fGDBProcess.destroy();
}
public InputStream getErrorStream() {
return fGDBProcess.getErrorStream();
}
public InputStream getInputStream() {
return fGDBProcess.getInputStream();
}
public OutputStream getOutputStream() {
return fGDBProcess.getOutputStream();
}
}
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