[Lldb-commits] [PATCH] D78978: [LLDB] Add support for WebAssembly debugging

Wed Jan 6 16:22:08 PST 2021

paolosev added a comment.

In D78978#2481358 <https://reviews.llvm.org/D78978#2481358>, @vwzm228 wrote:

> Is there any progress about such patch and D78801 <https://reviews.llvm.org/D78801>？
>
> I have implemented the debugging feature in our Wasm VM based on  https://reviews.llvm.org/D78801, and it already work to attach, set breakpoint, step, show variable value, backtrace...
>
> I am not sure if I need to change LLDB part to this one, or keep using D78801 <https://reviews.llvm.org/D78801>.
>
> But if both patches wont be merged, I have to maintain a private LLDB version....

Unfortunately I have not received any more feedback for this patch, or the alternative version D78801 <https://reviews.llvm.org/D78801>, so I assumed it won't move forward :(
Meanwhile, I have created a personal fork (https://github.com/paolosevMSFT/llvm-project/tree/WasmDbg).

I still think that it would be very useful to add support for Wasm debugging to LLDB. Especially in scenarios where Wasm is not used as part of a web app, but server side (node.js) or running on micro runtime for IoT devices.
I know that there is the problem that LLDB does not support segmented address spaces, and so this patch requires a couple of tiny but smelly changes to core code.
>From the mailing list I seem to remember that somebody was working to add support for segmented addresses, but I don't know what is the current state of the initiative.

I'd be happy to keep working on this, please let me know what I could do to progress toward an acceptable solution.

Repository:
  rG LLVM Github Monorepo

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https://reviews.llvm.org/D78978