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Pat Hickey bc1a11435e wiggle: emit a metadata module containing witx document (#1387) 
* wiggle: emit a metadata module containing witx document

* wiggle: put metadata module behind a wiggle_metadata feature

* wasi-common: add wiggle_metadata feature and optional witx dep

* refactor according to alex's advice

* wasi-common: make snapshots pub

* wasi-common: i do need a wiggle_metadata feature to be available

* Tweak features and such

* wiggle: fix tests by passing metadata flag to wiggle-runtime

* wiggle: need to move wiggle-runtime to a non-dev dependency

so that the feature resolves for external users of the crates

Co-authored-by: Alex Crichton <alex@alexcrichton.com>
2020-03-25 14:57:44 -05:00
..
src
wiggle: emit a metadata module containing witx document (#1387)
2020-03-25 14:57:44 -05:00
wig
Add a wasmtime::Linker type (#1384)
2020-03-23 21:02:31 -05:00
winx
[wasi-common]: winx now returns io::Error directly (#1243)
2020-03-09 10:32:01 +01:00
yanix
[wasi-common]: add armv7 support to wasi-common (#1269)
2020-03-10 19:18:59 +01:00
Cargo.toml
wiggle: emit a metadata module containing witx document (#1387)
2020-03-25 14:57:44 -05:00
LICENSE
Initial reorg.
2019-11-08 06:35:40 -08:00
LICENSE.cloudabi-utils
Initial reorg.
2019-11-08 06:35:40 -08:00
README.md
Miscelaneous docs updates and fixes. (#1249)
2020-03-08 16:11:17 +01:00

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.

Crates.io version Download docs.rs docs

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 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.