feat(runtime-c-api) Implement wasmer_trap
#1133
Conversation
The new `wasmer_import_trap` allows a host function to fail properly with the Wasmer trapping API.
Hywan
added
🎉 enhancement
|
Ready for a review! |
There was a problem hiding this comment.
Looks good! Just a few small nit-picks:
The naming of wasmer_import_trap is a little confusing to me, it sounds like it could give you the handle of something that traps that you could use in your import_object. Not sure what else to call it, though and not a huge issue. wasmer_trap may make more sense, it sounds more like a command to me.
| .do_early_trap(Box::new(error_message)); // never returns | ||
|
|
||
| #[allow(unreachable_code)] | ||
| wasmer_result_t::WASMER_OK |
There was a problem hiding this comment.
Perhaps we should panic here? Seems like a small thing, not sure what best practice is here
There was a problem hiding this comment.
cbindgen doesn't generate a C bindgen for a Rust function with ! as returned type.
Since I need to error before calling do_early_trap, I've decided to return a wasmer_result_t. And in the best scenario, I return WASMER_OK, even if it's unreachable. I'll add more documentation to explain.
lib/runtime-core/src/backend.rs
Outdated
| @@ -219,10 +219,11 @@ pub trait RunnableModule: Send + Sync { | |||
| } | |||
|
|
|||
| /// A wasm trampoline contains the necessary data to dynamically call an exported wasm function. | |||
| /// Given a particular signature index, we are returned a trampoline that is matched with that | |||
| /// Given a particular signature index, we are returning a trampoline that is matched with that | |||
There was a problem hiding this comment.
I prefer returned to returning here;
, we return a trampoline... is probably best though.
There was a problem hiding this comment.
I thought it was an English typo.
There was a problem hiding this comment.
I believe it's grammatically correct and called the "passive voice", it's often discouraged in English though because it takes more words and ends up being less specific. For example, I generally prefer direct writing like, "This function takes a function signature and returns a corresponding trampoline".
|
Go for |
Hywan
changed the title
wasmer_import_trapwasmer_trap
|
bors r+ |
1133: feat(runtime-c-api) Implement `wasmer_trap` r=Hywan a=Hywan Idea is to provide an API to get fallible host function by calling `wasmer_trap` to run the Wasmer trapping API. This is probably the easiest solution to not break the existing API, and not add a lot of complexity in the code. Co-authored-by: Ivan Enderlin <[email protected]>
Build succeeded
|
Address wasmerio/wasmer-go#58.
Idea is to provide an API to get fallible host function by calling
wasmer_trapto run the Wasmer trapping API.This is probably the easiest solution to not break the existing API, and not add a lot of complexity in the code.