[libcxx-commits] [libcxxabi] [libunwind] [llvm] [WebAssembly] Directly call EH personality function (PR #175202)

[Demetrius Kanios via libcxx-commits]

QuantumSegfault wrote:

> Are you planning to submit patches for this?

I'd be fine with doing the PR, once we figure out the direction (i.e. like this PR was not satisfactory)

> Given that _Unwind_CallPersonality is mostly a wrapper from our libunwind, making it a personality function within the bitcode signature seems a little awkward though. As I said the benefit of having it is we can save some instructions per catch site.

Which is why I'm saying why not merge `_Unwind_CallPersonality` down into `__gxx_wasm_personality_v0`. Make it so personality functions on Wasm take a single pointer to the EH object, and are expected to initialize the landing pad context. We keep the small code size, at the cost of breaking/changing the ABI?

https://github.com/llvm/llvm-project/pull/175202