/**
* This method does the necessary work to setup the input/output streams for the inferior process,
* by either preparing the PTY to be used, or by simply leaving the PTY null, which indicates that
* the input/output streams of the CLI should be used instead; this decision is based on the type
* of session.
*/
@Execute
public void stepInitializeInputOutput(final RequestMonitor rm) {
if (fBackend.getSessionType() == SessionType.REMOTE && !fBackend.getIsAttachSession()) {
// Remote non-attach sessions don't support multi-process and therefore will not
// start new processes. Those sessions will only start the one process, which should
// not have a console, because it's output is handled by GDB server.
fPty = null;
rm.done();
} else {
// Every other type of session that can get to this code, is starting a new process
// and requires a pty for it.
try {
fPty = new PTY();
// Tell GDB to use this PTY
fCommandControl.queueCommand(
fCommandFactory.createMIInferiorTTYSet(
(IMIContainerDMContext) getContainerContext(), fPty.getSlaveName()),
new ImmediateDataRequestMonitor<MIInfo>(rm) {
@Override
protected void handleFailure() {
// We were not able to tell GDB to use the PTY
// so we won't use it at all.
fPty = null;
rm.done();
}
});
} catch (IOException e) {
fPty = null;
rm.done();
}
}
}
/**
* This method indicates if we should use the -exec-continue command instead of the -exec-run
* command. This method can be overridden to allow for customization.
*/
protected boolean useContinueCommand() {
// Note that restart does not apply to remote sessions
IGDBBackend backend = fTracker.getService(IGDBBackend.class);
if (backend == null) {
return false;
}
// When doing remote non-attach debugging, we use -exec-continue instead of -exec-run
// For remote attach, if we get here it is that we are starting a new process
// (multi-process), so we want to use -exec-run
return backend.getSessionType() == SessionType.REMOTE && !backend.getIsAttachSession();
}
/**
* If we are dealing with a remote debugging session, connect to the target.
*
* @since 4.0
*/
@Execute
public void stepRemoteConnection(RequestMonitor rm) {
// If we are dealing with a non-attach remote session, it is now time to connect
// to the remote side. Note that this is the 'target remote' case
// and not the 'target extended-remote' case (remote attach session)
// This step is actually global for GDB. However, we have to do it after
// we have specified the executable, so we have to do it here.
// It is safe to do it here because a 'target remote' does not support
// multi-process so this step will not be executed more than once.
if (fBackend.getSessionType() == SessionType.REMOTE && !fBackend.getIsAttachSession()) {
boolean isTcpConnection =
CDebugUtils.getAttribute(
fAttributes, IGDBLaunchConfigurationConstants.ATTR_REMOTE_TCP, false);
if (isTcpConnection) {
String remoteTcpHost =
CDebugUtils.getAttribute(
fAttributes, IGDBLaunchConfigurationConstants.ATTR_HOST, INVALID);
String remoteTcpPort =
CDebugUtils.getAttribute(
fAttributes, IGDBLaunchConfigurationConstants.ATTR_PORT, INVALID);
fCommandControl.queueCommand(
fCommandFactory.createMITargetSelect(
fCommandControl.getContext(), remoteTcpHost, remoteTcpPort, false),
new DataRequestMonitor<MIInfo>(ImmediateExecutor.getInstance(), rm));
} else {
String serialDevice =
CDebugUtils.getAttribute(
fAttributes, IGDBLaunchConfigurationConstants.ATTR_DEV, INVALID);
fCommandControl.queueCommand(
fCommandFactory.createMITargetSelect(fCommandControl.getContext(), serialDevice, false),
new DataRequestMonitor<MIInfo>(ImmediateExecutor.getInstance(), rm));
}
} else {
rm.done();
}
}