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Daiki Ueno e70f73211d virtfs file: update cursor position on fd_read (#2070) 
* virtfs file: update cursor position on fd_read

If a handle is backed by InMemoryFile, fd_read (turned into
Handle::read_vectored) doesn't update the cursor position properly and
thus prevents the caller from detecting EOF.

* virtfs file: fd_{pread,pwrite}: update offset in iovec iteration

If multiple iovec's are supplied, fd_pread and fd_pwrite previously
access data at the same offset for each iovec.
2020-07-29 14:19:17 +02:00
..
src
virtfs file: update cursor position on fd_read (#2070)
2020-07-29 14:19:17 +02:00
WASI @ 2b027d91c2
latest wasi submodule has witx 0.8.5, required for the error_types iter
2020-04-06 13:39:29 -07:00
wig
Wasmtime 0.19.0 and Cranelift 0.66.0 (#2027)
2020-07-16 12:46:21 -05:00
winx
Wasmtime 0.19.0 and Cranelift 0.66.0 (#2027)
2020-07-16 12:46:21 -05:00
yanix
Use AsRef<Path> instead of AsRef<OsStr> in yanix functions (#1950)
2020-07-20 10:02:45 -07:00
build.rs
Move back to only one WASI submodule (#1434)
2020-03-30 14:45:23 -05:00
Cargo.toml
Fixes needed for 0.19.0 (#2035)
2020-07-16 17:27:21 -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
Fixes for cargo publish (#1416)
2020-03-26 20:31:12 -07:00

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/test_programs feature enabled:

cargo test --features test-programs/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.