rust jit wasm webassembly runtime wasi cranelift sandbox wasmtime

History

Adam C. Foltzer 819fad0d9f wiggle: generate offset accessors for structs (#6884 ) Adds methods of the shape `GeneratedStruct::offset_of_<field_name>() -> u32` to allow clients to get the same offsets used in the generated `read` and `write` methods. I don't believe there is currently a way to get these otherwise for applications that wish to selectively read and write to fields. I considered a couple alternatives to this: 1. Add methods like `read_<field_name>` and `write_<field_name>`. The interface to these ends up being awkward because the `GuestType` impls are currently for owned types, so these methods would be forced to either take ownership of the entire struct to write one field, or else silently clone the field. 2. Add `#[repr(C)]` to the generated struct definition so that clients could use tools like `memoffset` to calculate the offset themselves. I didn't want to depend on the witx offsets coinciding with `repr(C)`, though. I extended the Wiggle `records` to exercise these new methods.		1 year ago
..
generate	wiggle: generate offset accessors for structs (#6884)	1 year ago
macro	Dependency gardening for Wasmtime (#6731)	1 year ago
src	Fix typo (#6822)	1 year ago
test-helpers	Remove `maintenance` badges from the Cargo.toml files. (#6286)	2 years ago
tests	wiggle: generate offset accessors for structs (#6884)	1 year ago
Cargo.toml	Remove `maintenance` badges from the Cargo.toml files. (#6286)	2 years ago
LICENSE	[wiggle] Add docs and cargo metadata (#1297)	5 years ago
README.md	Fix link integrating with Wasmtime link (#6376)	2 years ago

README.md

wiggle

Wiggle is a code generator for the host side of a witx interface. It is invoked as a Rust procedural macro.

Wiggle is not specialized to any particular WebAssembly runtime. It is usable in at least Wasmtime and Lucet.

Learning more

Read the docs on docs.rs.

There are child crates for integrating with Wasmtime (this crate), and Lucet.

The wasi-common crate is implemented using Wiggle and the wasmtime-wasi crate integrates wasi-common with the Wasmtime engine.

Andrew Brown wrote a great blog post on using Wiggle with Wasmtime.