c7cd70fcec
This commit removes all import resolution handling from the `wasmtime-jit` crate, instead moving the logic to the `wasmtime` crate. Previously `wasmtime-jit` had a generic `Resolver` trait and would do all the import type matching itself, but with the upcoming module-linking implementation this is going to get much trickier. The goal of this commit is to centralize all meaty "preparation" logic for instantiation into one location, probably the `wasmtime` crate itself. Instantiation will soon involve recursive instantiation and management of alias definitions as well. Having everything in one location, especially with access to `Store` so we can persist instances for safety, will be quite convenient. Additionally the `Resolver` trait isn't really necessary any more since imports are, at the lowest level, provided as a list rather than a map of some kind. More generic resolution functionality is provided via `Linker` or user layers on top of `Instance::new` itself. This makes matching up provided items to expected imports much easier as well. Overall this is largely just moving code around, but most of the code in the previous `resolve_imports` phase can be deleted since a lot of it is handled by surrounding pieces of `wasmtime` as well.
wasmtime
A standalone runtime for WebAssembly
A Bytecode Alliance project
Guide | Contributing | Website | Chat
Installation
The Wasmtime CLI can be installed on Linux and macOS with a small install script:
$ curl https://wasmtime.dev/install.sh -sSf | bash
Windows or otherwise interested users can download installers and binaries directly from the GitHub Releases page.
Example
If you've got the Rust compiler installed then you can take some Rust source code:
fn main() {
println!("Hello, world!");
}
and compile/run it with:
$ rustup target add wasm32-wasi
$ rustc hello.rs --target wasm32-wasi
$ wasmtime hello.wasm
Hello, world!
Features
-
Lightweight. Wasmtime is a standalone runtime for WebAssembly that scales with your needs. It fits on tiny chips as well as makes use of huge servers. Wasmtime can be embedded into almost any application too.
-
Fast. Wasmtime is built on the optimizing Cranelift code generator to quickly generate high-quality machine code at runtime.
-
Configurable. Whether you need to precompile your wasm ahead of time, generate code blazingly fast with Lightbeam, or interpret it at runtime, Wasmtime has you covered for all your wasm-executing needs.
-
WASI. Wasmtime supports a rich set of APIs for interacting with the host environment through the WASI standard.
-
Standards Compliant. Wasmtime passes the official WebAssembly test suite, implements the official C API of wasm, and implements future proposals to WebAssembly as well. Wasmtime developers are intimately engaged with the WebAssembly standards process all along the way too.
Language Support
You can use Wasmtime from a variety of different languages through embeddings of the implementation:
- Rust - the
wasmtimecrate - C - the
wasm.h,wasi.h, andwasmtime.hheaders - Python - the
wasmtimePyPI package - .NET - the
WasmtimeNuGet package - Go - the
wasmtime-gorepository
Documentation
📚 Read the Wasmtime guide here! 📚
The wasmtime guide is the best starting point to learn about what Wasmtime can do for you or help answer your questions about Wasmtime. If you're curious in contributing to Wasmtime, it can also help you do that!.
It's Wasmtime.