Stream: git-wasmtime

Topic: wasmtime / issue #6191 WASI strace feature request

Wasmtime GitHub notifications bot (Apr 10 2023 at 16:12):

TerrorJack opened issue #6191:

Thanks for filing a feature request! Please fill out the TODOs below.

Feature

It would be very nice if wasmtime has a WASI strace feature, which logs all WASI syscalls.

Benefit

This feature improves observability of wasm modules being executed, and it's quite useful to debug the wasm module when things go wrong.

Implementation

Likely a CLI option, and some modification to the wasmtime-wasi crate.

Alternatives

Some third-party rust program that uses the wasmtime crate and implements the strace middleware there.

Wasmtime GitHub notifications bot (Apr 10 2023 at 16:21):

abrown commented on issue #6191:

I've used the RUST_LOG environment variable for this in the past.

Wasmtime GitHub notifications bot (Apr 10 2023 at 16:33):

TerrorJack commented on issue #6191:

Ah I didn't read the documentation clearly! There's already RUST_LOG=wasi_common=trace. Thanks a lot for reminding me @abrown!

Wasmtime GitHub notifications bot (Apr 10 2023 at 16:33):

TerrorJack closed issue #6191:

Thanks for filing a feature request! Please fill out the TODOs below.

Feature

It would be very nice if wasmtime has a WASI strace feature, which logs all WASI syscalls.

Benefit

This feature improves observability of wasm modules being executed, and it's quite useful to debug the wasm module when things go wrong.

Implementation

Likely a CLI option, and some modification to the wasmtime-wasi crate.

Alternatives

Some third-party rust program that uses the wasmtime crate and implements the strace middleware there.

Last updated: Dec 06 2025 at 06:05 UTC