Is CodeLLDB using a custom built LLDB?

[billy1624]

Hey @vadimcn, thank you so much for the tool! It helps me a lot to debug code written in Rust :)

I was comparing the behaviour of the oficial LLDB binary with the LLDB that shipped with CodeLLDB.

I found when calling "thread step-out" command. The behaviour of it is different, the official LLDB will display the return value of a function but the LLDB shipped with CodeLLDB does not.

I cannot find the pipeline in which you build the LLDB from scratch, so I ask here.

Is it intended that the "return value" output / feature is disabled?

[vadimcn]

I didn't change anything about this feature (at least intentionally).
This could be just the difference of the base LLDB versions. Or, it could be that Apple has added something in the Swift-enabled version.

[billy1624]

Hey @vadimcn, thanks for the quick response! Upon some digging I found this repository, https://github.com/vadimcn/llvm-project/tree/codelldb/15.x which is a fork of llvm-project with a Rust plugin in it. Is there a branch for LLVM 16.x version? I'd love to see it, thanks!! :)

[tyt2y3]

If I have to make a (very) wild guess, may be we'd need to implement Language::GetReturnType (or related methods) in the RustLanguage plugin?

https://github.com/llvm/llvm-project/blob/744a968f91f7bb92594a422c1b71f03a47c2415d/lldb/source/Plugins/Language/CPlusPlus/CPlusPlusLanguage.cpp#L298