5953215bac
* Auto-generate shims for old `wasi_unstable` module This commit is effectively just doing what #707 already did, but applying it to the `snapshot_0` module as well. The end result is the same, where we cut down on all the boilerplate in `snapshot_0` and bring it in line with the main `wasi_snapshot_preview1` implementation. The goal here is to make it easier to change the two in tandem since they're both doing the same thing. * Migrate `wasi_common::hostcalls` to a macro This commit migrates the `hostcalls` module to being auto-generated by a macro rather than duplicating a handwritten signature for each wasi syscall. * Auto-generate snapshot_0's `hostcalls` module Similar to the previous commit, but for `snapshot_0` * Delete the `wasi-common-cbindgen` crate This is no longer needed with the hostcalls macro now, we can easily fold the definition of the cbindgen macro into the same crate. * Rustfmt * Fix windows build errors * Rustfmt * Remove now no-longer-necessary code * rustfmt
wasi-common
A Bytecode Alliance project
A library providing a common implementation of WASI hostcalls for re-use in any WASI-enabled runtime.
The wasi-common crate 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 1.37.0.
Supported syscalls
*nix
In our *nix implementation, we currently support the entire WASI API with the exception of socket hostcalls:
sock_recvsock_sendsock_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.
Windows
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!
Development hints
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
Now, you should be able to run the integration testsuite by running cargo test on the
test-programs package with test_programs feature enabled:
cargo test --features test_programs --package test-programs
Third-Party Code
Significant parts of our hostcall implementations are derived from the C implementations in
cloudabi-utils. See LICENSE.cloudabi-utils for license information.