Files

Dan Gohman 47490b4383 Use rsix to make system calls in Wasmtime. (#3355 )

* Use rsix to make system calls in Wasmtime.

`rsix` is a system call wrapper crate that we use in `wasi-common`,
which can provide the following advantages in the rest of Wasmtime:

 - It eliminates some `unsafe` blocks in Wasmtime's code. There's
   still an `unsafe` block in the library, but this way, the `unsafe`
   is factored out and clearly scoped.

 - And, it makes error handling more consistent, factoring out code for
   checking return values and `io::Error::last_os_error()`, and code that
   does `errno::set_errno(0)`.

This doesn't cover *all* system calls; `rsix` doesn't implement
signal-handling APIs, and this doesn't cover calls made through `std` or
crates like `userfaultfd`, `rand`, and `region`.

2021-09-17 15:28:56 -07:00

cap-std-sync

Use rsix to make system calls in Wasmtime. (#3355 )

2021-09-17 15:28:56 -07:00

src

Update to cap-std 0.17.0. (#3198 )

2021-08-17 16:08:03 -07:00

tokio

Use rsix to make system calls in Wasmtime. (#3355 )

2021-09-17 15:28:56 -07:00

WASI @ 5ab83a68d4

update WASI submodule (#3025 )

2021-06-24 14:21:48 -05:00

build.rs

Add "cargo:rerun-if-changed=build.rs" to some build.rs files.

2021-09-16 11:52:21 -07:00

Cargo.toml

Use rsix to make system calls in Wasmtime. (#3355 )

2021-09-17 15:28:56 -07:00

LICENSE

Initial reorg.

2019-11-08 06:35:40 -08:00

README.md

wasi-common no longer contains code derived from cloudabi-utils

2021-01-29 13:28:13 -08:00

README.md

`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_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.

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