Question about exception handling of wasi function

[unicornt]

Hi, I noticed that wasmer handle error happened in wasi function different from wasmtime. For example, when meeting parameter that is not aligned to 4 in fd_write, wasmtime raises an exception Pointer not aligned to 4 error while wasmer is not.

I checked the specifications of wasi and found that the parameter was required to be aligned.

I'm quite curious about how you think about it.

[theduke]

I believe this currently happens to work on x86 because we don't specifically guard against it, but will fail on ARM architectures.

This working is more of an accident rather than a conscious design decision.