Qt data formatting

[maziac]

Hi,

I have taken CodeLLDB into use and it's working pretty good (and compared to gdb really fast).

I can also inspect data. There is only one problem:
The application I am debugging is a Qt application and I am not able to look into the Qt data structures.

One thing I tried was to take the python from qtcreator and made lldb load it in "initCommands".
But still I can't look into the data structures.

Any advise how this can be achieved.

[vadimcn]

Sorry, I've no idea what "python from qtcreator" is... Are those LLDB data formatters? That should have worked. CodeLLDB uses a fairly normal LLDB underneath.

[maziac]

Yes, lldb data formatters.
Is there something special in the lldb included in CodeLLDB?
I had to use an external lldb-10 because the CodeLLDB internal lldb was crashing on startup.

[vadimcn]

Is there something special in the lldb included in CodeLLDB?

Mostly things for better Rust support, otherwise it's pretty stock.

CodeLLDB internal lldb was crashing on startup.

Could you please be more specific?

[maziac]

The crash was similar to this one here #514
(but on Linux).

But that it is not what I'm after. My problem is the data formatting.

[maziac]

I was able to solve the problem. For anyone who might run into something similar:
The problem was that the qt formatters require pygdbmi to be installed.
(I had to compile/install it myself; didn't find it for python3).

Then with Qt's lldbbridge.py it is possible to look at least into the QString and get a little information (e.g. size of QVector) for other structures.

Then I tried the qt.py (need to be updated to python3) from KDevelop with a little more luck: I can view QMap/QVector internals now, but for some reason QString is not working for me.

Anyhow, all of this is not CodeLLDB related.

[alex-tdrn]

Hi, I found this repo and it seems to work quite well for QVector and QString, but not really for QMap. Maybe you can use it as a starting point, or combine it with your solution.

Hope it helps ✌️

[maziac]

Yes, it helps. Thanks.