Roman Volosatovs (Mar 07 2022 at 16:02): Roman Volosatovs (Mar 07 2022 at 16:02):Is there any functionality provided that allows overriding snapshot preview 1 implementation?
I see that the implementation is provided for WasiCtx https://github.com/bytecodealliance/wasmtime/blob/8c9c72caaac6f7a21f031f274c87eb26ac630ca7/crates/wasi-common/src/snapshots/preview_1.rs#L194-L1182
Obvious approach with wrapping WasiCtx into a custom struct implementing the trait and using that context instead does not seem to work, in particular because add_to_linker expects a getter returning a WasiCtx struct https://github.com/bytecodealliance/wasmtime/blob/7a1b7cdf92a644a256a9f4c5c002682e1900d817/crates/wasi/src/lib.rs#L47
linker.func_wrap("wasi_snapshot_preview1"... approach seems to break the runtime, but I have to explore this option more.
Regardless, it would be beneficial to have an implementable trait here.
Would refactoring add_to_linker closure signature return type to use a trait instead be an acceptable way forward?
Any suggestions, ideas?
Roman Volosatovs (Mar 07 2022 at 18:32):Filed https://github.com/bytecodealliance/wasmtime/pull/3895
Last updated: Dec 06 2025 at 06:05 UTC