Hi Jason,
This is brilliant! 
When we’ll have segmented address spaces in LLDB maybe it will be possible to add support for WebAssembly debugging. My patch (https://reviews.llvm.org/D78801) was blocked by my inability to manage addresses for different Wasm modules in a clean (or at least acceptably clean) way.
Looking forward to this implementation, let me know if I can help in any way!
Thanks!
– Paolo Severini