This repo will ultimately serve as a library providing a common implementation of WASI hostcalls for re-use in any WASI (and potentially non-WASI) runtimes such as [Wasmtime] and [Lucet].
The library is an adaption of [lucet-wasi] crate from the [Lucet] project, and it is currently based on 40ae1df git revision.
Please note that the library requires Rust compiler version at least 1.36.0.
In our *nix implementation, we currently support the entire [WASI API]
with the exception of socket hostcalls:
- sock_recv
- sock_send
- sock_shutdown
We expect these to be implemented when network access is standardised.
We also currently do not support the proc_raise hostcall, as it is expected to
be dropped entirely from WASI.
In our Windows implementation, we currently support the minimal subset of [WASI API] which allows for running the very basic "Hello world!" style WASM apps. More coming shortly, so stay tuned!
When testing the crate, you may want to enable and run full wasm32 integration testsuite. This
requires wasm32-wasi target installed which can be done as follows using [rustup]
rustup target add wasm32-wasi
Next initiate submodules containing the integration testsuite
git submodule update --init
Now, you should be able to run the integration testsuite by enabling the wasm_tests feature
cargo test --features wasm_tests
Significant parts of our hostcall implementations are derived from the C implementations in
cloudabi-utils. See LICENSE.cloudabi-utils for license information.