bool
Driver::HandleIOEvent (const SBEvent &event)
{
bool quit = false;
const uint32_t event_type = event.GetType();
if (event_type & IOChannel::eBroadcastBitHasUserInput)
{
// We got some input (i.e. a command string) from the user; pass it off to the command interpreter for
// handling.
const char *command_string = SBEvent::GetCStringFromEvent(event);
if (command_string == NULL)
command_string = "";
SBCommandReturnObject result;
// We don't want the result to bypass the OutWrite function in IOChannel, as this can result in odd
// output orderings and problems with the prompt.
m_debugger.GetCommandInterpreter().HandleCommand (command_string, result, true);
if (result.GetOutputSize() > 0)
m_io_channel_ap->OutWrite (result.GetOutput(), result.GetOutputSize(), NO_ASYNC);
if (result.GetErrorSize() > 0)
m_io_channel_ap->OutWrite (result.GetError(), result.GetErrorSize(), NO_ASYNC);
// We are done getting and running our command, we can now clear the
// m_waiting_for_command so we can get another one.
m_waiting_for_command = false;
// If our editline input reader is active, it means another input reader
// got pushed onto the input reader and caused us to become deactivated.
// When the input reader above us gets popped, we will get re-activated
// and our prompt will refresh in our callback
if (m_editline_reader.IsActive())
{
ReadyForCommand ();
}
}
else if (event_type & IOChannel::eBroadcastBitUserInterrupt)
{
// This is here to handle control-c interrupts from the user. It has not yet really been implemented.
// TO BE DONE: PROPERLY HANDLE CONTROL-C FROM USER
//m_io_channel_ap->CancelInput();
// Anything else? Send Interrupt to process?
}
else if ((event_type & IOChannel::eBroadcastBitThreadShouldExit) ||
(event_type & IOChannel::eBroadcastBitThreadDidExit))
{
// If the IOChannel thread is trying to go away, then it is definitely
// time to end the debugging session.
quit = true;
}
return quit;
}
void
Driver::ProcessEvent(SBEvent& event)
{
if (!event.GetBroadcaster().IsValid())
return;
uint32_t event_type = event.GetType();
if (event.BroadcasterMatchesRef (*m_io_channel_ap))
{
if ((event_type & IOChannel::eBroadcastBitThreadShouldExit) ||
(event_type & IOChannel::eBroadcastBitThreadDidExit))
{
SetIsDone();
if (event_type & IOChannel::eBroadcastBitThreadDidExit)
iochannel_thread_exited = true;
}
else
{
if (HandleIOEvent (event))
SetIsDone();
}
}
else if (SBProcess::EventIsProcessEvent (event))
{
HandleProcessEvent (event);
}
else if (SBBreakpoint::EventIsBreakpointEvent (event))
{
HandleBreakpointEvent (event);
}
else if (event.BroadcasterMatchesRef (m_interpreter->GetBroadcaster()))
{
// TODO: deprecate the eBroadcastBitQuitCommandReceived event
// now that we have SBCommandInterpreter::SetCommandOverrideCallback()
// that can take over a command
if (event_type & SBCommandInterpreter::eBroadcastBitQuitCommandReceived)
{
SetIsDone();
}
else if (event_type & SBCommandInterpreter::eBroadcastBitAsynchronousErrorData)
{
const char *data = SBEvent::GetCStringFromEvent (event);
m_io_channel_ap->ErrWrite (data, strlen(data), ASYNC);
}
else if (event_type & SBCommandInterpreter::eBroadcastBitAsynchronousOutputData)
{
const char *data = SBEvent::GetCStringFromEvent (event);
m_io_channel_ap->OutWrite (data, strlen(data), ASYNC);
}
}
}
void
SBDebugger::HandleProcessEvent (const SBProcess &process, const SBEvent &event, FILE *out, FILE *err)
{
if (!process.IsValid())
return;
TargetSP target_sp (process.GetTarget().GetSP());
if (!target_sp)
return;
const uint32_t event_type = event.GetType();
char stdio_buffer[1024];
size_t len;
Mutex::Locker api_locker (target_sp->GetAPIMutex());
if (event_type & (Process::eBroadcastBitSTDOUT | Process::eBroadcastBitStateChanged))
{
// Drain stdout when we stop just in case we have any bytes
while ((len = process.GetSTDOUT (stdio_buffer, sizeof (stdio_buffer))) > 0)
if (out != NULL)
::fwrite (stdio_buffer, 1, len, out);
}
if (event_type & (Process::eBroadcastBitSTDERR | Process::eBroadcastBitStateChanged))
{
// Drain stderr when we stop just in case we have any bytes
while ((len = process.GetSTDERR (stdio_buffer, sizeof (stdio_buffer))) > 0)
if (err != NULL)
::fwrite (stdio_buffer, 1, len, err);
}
if (event_type & Process::eBroadcastBitStateChanged)
{
StateType event_state = SBProcess::GetStateFromEvent (event);
if (event_state == eStateInvalid)
return;
bool is_stopped = StateIsStoppedState (event_state);
if (!is_stopped)
process.ReportEventState (event, out);
}
}
void
IOChannel::Run ()
{
SBListener listener("IOChannel::Run");
std::string new_line;
SBBroadcaster interpreter_broadcaster (m_driver->GetDebugger().GetCommandInterpreter().GetBroadcaster());
listener.StartListeningForEvents (interpreter_broadcaster,
SBCommandInterpreter::eBroadcastBitResetPrompt |
SBCommandInterpreter::eBroadcastBitThreadShouldExit |
SBCommandInterpreter::eBroadcastBitQuitCommandReceived);
listener.StartListeningForEvents (*this,
IOChannel::eBroadcastBitThreadShouldExit);
listener.StartListeningForEvents (*m_driver,
Driver::eBroadcastBitReadyForInput |
Driver::eBroadcastBitThreadShouldExit);
// Let anyone know that the IO channel is up and listening and ready for events
BroadcastEventByType (eBroadcastBitThreadDidStart);
bool done = false;
while (!done)
{
SBEvent event;
listener.WaitForEvent (UINT32_MAX, event);
if (!event.IsValid())
continue;
const uint32_t event_type = event.GetType();
if (event.GetBroadcaster().IsValid())
{
if (event.BroadcasterMatchesPtr (m_driver))
{
if (event_type & Driver::eBroadcastBitReadyForInput)
{
std::string line;
if (CommandQueueIsEmpty())
{
if (LibeditGetInput(line) == false)
{
// EOF or some other file error occurred
done = true;
continue;
}
}
else
{
GetCommandFromQueue (line);
}
// TO BE DONE: FIGURE OUT WHICH COMMANDS SHOULD NOT BE REPEATED IF USER PRESSES PLAIN 'RETURN'
// AND TAKE CARE OF THAT HERE.
SBEvent line_event(IOChannel::eBroadcastBitHasUserInput,
line.c_str(),
line.size());
BroadcastEvent (line_event);
}
else if (event_type & Driver::eBroadcastBitThreadShouldExit)
{
done = true;
break;
}
}
else if (event.BroadcasterMatchesRef (interpreter_broadcaster))
{
switch (event_type)
{
case SBCommandInterpreter::eBroadcastBitResetPrompt:
{
const char *new_prompt = SBEvent::GetCStringFromEvent (event);
if (new_prompt)
g_prompt_map[m_edit_line] = new_prompt;
}
break;
case SBCommandInterpreter::eBroadcastBitThreadShouldExit:
case SBCommandInterpreter::eBroadcastBitQuitCommandReceived:
done = true;
break;
}
}
else if (event.BroadcasterMatchesPtr (this))
{
if (event_type & IOChannel::eBroadcastBitThreadShouldExit)
{
done = true;
break;
}
}
}
}
BroadcastEventByType (IOChannel::eBroadcastBitThreadDidExit);
m_driver = NULL;
m_read_thread = NULL;
}
// This function handles events that were broadcast by the process.
void
Driver::HandleProcessEvent (const SBEvent &event)
{
using namespace lldb;
const uint32_t event_type = event.GetType();
if (event_type & SBProcess::eBroadcastBitSTDOUT)
{
// The process has stdout available, get it and write it out to the
// appropriate place.
GetProcessSTDOUT ();
}
else if (event_type & SBProcess::eBroadcastBitSTDERR)
{
// The process has stderr available, get it and write it out to the
// appropriate place.
GetProcessSTDERR ();
}
else if (event_type & SBProcess::eBroadcastBitStateChanged)
{
// Drain all stout and stderr so we don't see any output come after
// we print our prompts
GetProcessSTDOUT ();
GetProcessSTDERR ();
// Something changed in the process; get the event and report the process's current status and location to
// the user.
StateType event_state = SBProcess::GetStateFromEvent (event);
if (event_state == eStateInvalid)
return;
SBProcess process (SBProcess::GetProcessFromEvent (event));
assert (process.IsValid());
switch (event_state)
{
case eStateInvalid:
case eStateUnloaded:
case eStateConnected:
case eStateAttaching:
case eStateLaunching:
case eStateStepping:
case eStateDetached:
{
char message[1024];
int message_len = ::snprintf (message, sizeof(message), "Process %llu %s\n", process.GetProcessID(),
m_debugger.StateAsCString (event_state));
m_io_channel_ap->OutWrite(message, message_len, ASYNC);
}
break;
case eStateRunning:
// Don't be chatty when we run...
break;
case eStateExited:
{
SBCommandReturnObject result;
m_debugger.GetCommandInterpreter().HandleCommand("process status", result, false);
m_io_channel_ap->ErrWrite (result.GetError(), result.GetErrorSize(), ASYNC);
m_io_channel_ap->OutWrite (result.GetOutput(), result.GetOutputSize(), ASYNC);
}
break;
case eStateStopped:
case eStateCrashed:
case eStateSuspended:
// Make sure the program hasn't been auto-restarted:
if (SBProcess::GetRestartedFromEvent (event))
{
// FIXME: Do we want to report this, or would that just be annoyingly chatty?
char message[1024];
int message_len = ::snprintf (message, sizeof(message), "Process %llu stopped and was programmatically restarted.\n",
process.GetProcessID());
m_io_channel_ap->OutWrite(message, message_len, ASYNC);
}
else
{
if (GetDebugger().GetSelectedTarget() == process.GetTarget())
{
SBCommandReturnObject result;
UpdateSelectedThread ();
m_debugger.GetCommandInterpreter().HandleCommand("process status", result, false);
m_io_channel_ap->ErrWrite (result.GetError(), result.GetErrorSize(), ASYNC);
m_io_channel_ap->OutWrite (result.GetOutput(), result.GetOutputSize(), ASYNC);
}
else
{
SBStream out_stream;
uint32_t target_idx = GetDebugger().GetIndexOfTarget(process.GetTarget());
if (target_idx != UINT32_MAX)
out_stream.Printf ("Target %d: (", target_idx);
else
out_stream.Printf ("Target <unknown index>: (");
process.GetTarget().GetDescription (out_stream, eDescriptionLevelBrief);
out_stream.Printf (") stopped.\n");
m_io_channel_ap->OutWrite (out_stream.GetData(), out_stream.GetSize(), ASYNC);
}
}
break;
}
}
}
