490d49a768
* Adjust dependency directives between crates This commit is a preparation for the release process for Wasmtime. The specific changes here are to delineate which crates are "public", and all version requirements on non-public crates will now be done with `=A.B.C` version requirements instead of today's `A.B.C` version requirements. The purpose for doing this is to assist with patch releases that might happen in the future. Patch releases of wasmtime are already required to not break the APIs of "public" crates, but no such guarantee is given about "internal" crates. This means that a patch release runs the risk, for example, of breaking an internal API. In doing so though we would also need to release a new major version of the internal crate, but we wouldn't have a great hole in the number scheme of major versions to do so. By using `=A.B.C` requirements for internal crates it means we can safely ignore strict semver-compatibility between releases of internal crates for patch releases, since the only consumers of the crate will be the corresponding patch release of the `wasmtime` crate itself (or other public crates). The `publish.rs` script has been updated with a check to verify that dependencies on internal crates are all specified with an `=` dependency, and dependnecies on all public crates are without a `=` dependency. This will hopefully make it so we don't have to worry about what to use where, we just let CI tell us what to do. Using this modification all version dependency declarations have been updated. Note that some crates were adjusted to simply remove their `version` requirement in cases such as the crate wasn't published anyway (`publish = false` was specified) or it's in the `dev-dependencies` section which doesn't need version specifiers for path dependencies. * Switch to normal sever deps for cranelift dependencies These crates will now all be considered "public" where in patch releases they will be guaranteed to not have breaking changes.
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/test_programs feature enabled:
cargo test --features test-programs/test_programs --package test-programs