Files

Andrew Brown 060f12571d wiggle: adapt Wiggle strings for shared use (#5264 )

* wiggle: adapt Wiggle strings for shared use

This is an extension of #5229 for the `&str` and `&mut str` types. As
documented there, we are attempting to maintain Rust guarantees for
slices that Wiggle hands out in the presence of WebAssembly shared
memory, in which case multiple threads could be modifying the underlying
data of the slice.

This change changes the API of `GuestPtr` to return an `Option` which is
`None` when attempting to view the WebAssembly data as a string and the
underlying WebAssembly memory is shared. This reuses the
`UnsafeGuestSlice` structure from #5229 to do so and appropriately marks
the region as borrowed in Wiggle's manual borrow checker. Each original
call site in this project's WASI implementations is fixed up to `expect`
that a non-shared memory is used.  (Note that I can find no uses of
`GuestStrMut` in the WASI implementations).

* wiggle: make `GuestStr*` containers wrappers of `GuestSlice*`

This change makes it possible to reuse the underlying logic in
`UnsafeGuestSlice` and the `GuestSlice*` implementations to continue to
expose the `GuestStr` and `GuestStrMut` types. These types now are
simple wrappers of their `GuestSlice*` variant. The UTF-8 validation
that distinguished `GuestStr*` now lives in the `TryFrom`
implementations for each type.

2022-11-14 22:33:24 +00:00

cap-std-sync

Avoid unconditional getrandom syscall creating a WasiCtx (#5244 )

2022-11-10 13:58:11 -06:00

src

wiggle: adapt Wiggle strings for shared use (#5264 )

2022-11-14 22:33:24 +00:00

tokio

wiggle: make wasmtime a mandatory dep, get rid of own Trap enum (#5137 )

2022-10-27 09:28:10 -07:00

WASI @ 0ba0c5e2e3

Implement sock_accept

2022-01-31 16:25:11 -08:00

build.rs

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

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

Cargo.toml

wiggle: make wasmtime a mandatory dep, get rid of own Trap enum (#5137 )

2022-10-27 09:28:10 -07:00

LICENSE

Initial reorg.

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

README.md

Implement the remaining socket-related WASI functions. (#4776 )

2022-08-26 11:39:51 -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.

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 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