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wasmtime/crates/wasi-common
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Dan Gohman d4fd229e5e Reorganize wasi-misc-tests. (#575) 
* Reorganize wasi-misc-tests.

Move wasi-misc-tests out of wasi-common, to break a dependency cycle;
previously, wasmtime-* depended on wasi-common, but wasi-common
dev-dependended on wasmtime-*.

Now, wasi-common no longer dev-depends on wasmtime-*; instead, the
tests are in their own crate which depends on wasi-common and on
wasmtime-*.

Also, rename wasi-misc-tests to wasi-tests for simplicity.

This also removes the "wasm_tests" feature; it's replaced by the
"test-programs" feature.

* Update the CI script to use the new feature name.

* Update the CI script to use the new feature name in one more place.

* Change a `write!` to a `writeln!`.
2019-11-15 08:03:43 -08:00
..
src
Update repository URLs for the Bytecode Alliance. (#550)
2019-11-12 09:18:59 -08:00
WASI @ 8a968f2667
General Cargo.toml cleanup. (#529)
2019-11-08 17:22:37 -06:00
wasi-common-cbindgen
Update repository URLs for the Bytecode Alliance. (#550)
2019-11-12 09:18:59 -08:00
wig
Update repository URLs for the Bytecode Alliance. (#550)
2019-11-12 09:18:59 -08:00
winx
Update repository URLs for the Bytecode Alliance. (#550)
2019-11-12 09:18:59 -08:00
Cargo.toml
Reorganize wasi-misc-tests. (#575)
2019-11-15 08:03:43 -08:00
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
Update repository URLs for the Bytecode Alliance. (#550)
2019-11-12 09:18:59 -08:00

README.md

wasi-common

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

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

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.