011d2e1faa
* Refactor away the `Instantiator` type in Wasmtime This internal type in Wasmtime was primarily used for the module linking proposal to handle instantiation of many instances and refactor out the sync and async parts to minimize duplication. With the removal of the module linking proposal, however, this type isn't really necessary any longer. In working to implement the component model proposal I was looking already to refactor this and I figured it'd be good to land that ahead of time on `main` separate of other refactorings. This commit removes the `Instantiator` type in the `instance` module. The type was already private to Wasmtime so this shouldn't have any impact on consumers. This allows simplifying various code paths to avoid another abstraction. The meat of instantiation is moved to `Instance::new_raw` which should be reusable for the component model as well. One bug is actually fixed in this commit as well where `Linker::instantiate` and `InstancePre::instantiate` failed to check that async support was disabled on a store. This means that they could have led to a panic if used with an async store and a start function called an async import (or an async resource limiter yielded). A few tests were updated with this. * Review comments
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, 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.
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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 or usewasmtimeConan package - C++ - the
wasmtime-cpprepository or usewasmtime-cppConan package - 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.