2c6841041d
* Validate modules while translating This commit is a change to cranelift-wasm to validate each function body as it is translated. Additionally top-level module translation functions will perform module validation. This commit builds on changes in wasmparser to perform module validation interwtwined with parsing and translation. This will be necessary for future wasm features such as module linking where the type behind a function index, for example, can be far away in another module. Additionally this also brings a nice benefit where parsing the binary only happens once (instead of having an up-front serial validation step) and validation can happen in parallel for each function. Most of the changes in this commit are plumbing to make sure everything lines up right. The major functional change here is that module compilation should be faster by validating in parallel (or skipping function validation entirely in the case of a cache hit). Otherwise from a user-facing perspective nothing should be that different. This commit does mean that cranelift's translation now inherently validates the input wasm module. This means that the Spidermonkey integration of cranelift-wasm will also be validating the function as it's being translated with cranelift. The associated PR for wasmparser (bytecodealliance/wasmparser#62) provides the necessary tools to create a `FuncValidator` for Gecko, but this is something I'll want careful review for before landing! * Read function operators until EOF This way we can let the validator take care of any issues with mismatched `end` instructions and/or trailing operators/bytes.
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.
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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.
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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 - 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.