IPC Debugger chat

Subv07/01/2019
Anybody feels like working on an IPC debugger for citra? It should help out a lot with debugging LLE module interactions

B3N3007/02/2019
can you define what it should do (maybe write some stories). So we can just write small changes one at at time till the debugger is fully functional?

Subv07/02/2019
it should basically be a Qt widget that logs every single IPC request and its respective reply
selecting a request should tell me:
- The Process that initiated it
- The thread that initiated it
- The target session
- Whether it's a request or a reply
- Whether the target is HLE or not
- The command header
- The response code if a reply (Or maybe we simply dump the whole IPC packet from the buffer according to the header?)
It should also highlight those requests that didn't return RESULT_SUCCESS
it should highlight unhandled requests if the target is HLE
(in the future maybe let us place breakpoints so that we can break on a specific request being made, but that's way more ambitious and not something i'd consider 'easy')

B3N3007/02/2019
my idea was if we split it down into small simple task that can get added a single PR it's way easier to get it done and you probably get more devs to work on it
All in all what you want doesn't sound difficult but it involves ui so I'm out :stuck_out_tongue:

Subv07/02/2019
the only sane split i can see here is separating the core implementation ( a "recorder"-like feature) from the presentation logic in Qt (a subscriber model)
something similar to how the PICA recorders work

B3N3007/02/2019
you could still spilt it into HLE/LLE request/response parts

Subv07/02/2019
the core emits "events" with the required information, and the frontend subscribes to those events to present them in the UI
@B3N30 eh, i'm not sure about that
the core part isn't even hard to do, just hook SendSyncRequest / ReplyAndReceive for LLE, and SendSyncRequest / SendSyncRequest for HLE
i would do it myself but my laptop is broken

B3N3007/02/2019
like I said I can do the core part but not the ui

BreadFish6407/03/2019
sigh
How frequent are IPC requests? Like multiple per second?

wwylele / 白疾風07/03/2019
I'd bet 100 per second

B3N3007/03/2019
i think we need to specify some filter for that debugger

BreadFish6407/03/2019
Yeah

B3N3007/03/2019
usually the ones you are interested in aren't that frequent

BreadFish6407/03/2019
Well I'm away from home for 6 more days
I could try to throw something together when I'm back