| Continuous Integration | Test Coverage | Documentation | Crates.io |
|---|---|---|---|
Wasmi - WebAssembly (Wasm) Interpreter
Wasmi is an efficient and lightweight WebAssembly interpreter with a focus on constrained and embedded systems.
Security Audits
Wasmi is suitable for safety critical use cases and has been audited several times already.
| Wasmi Version(s) | Auditor | Contractor | Report |
|---|---|---|---|
0.36.0-0.38.0 |
Runtime Verification Inc. | Stellar Development Foundation | |
0.31.0 |
SRLabs | Parity Technologies |
Distinct Features
- Simple, correct and deterministic execution of WebAssembly.
- Low-overhead and cross-platform WebAssembly runtime for embedded environments.
- Compiler/JIT bomb resisting translation.
- Loosely mirrors the Wasmtime API.
- 100% WebAssembly spec testsuite compliance.
- Built-in support for fuel metering.
- Supports the official Wasm C-API.
Docs
- 📖 Usage Guide: learn how to use the Wasmi API properly.
- 🛠️ Development Guide: learn how to develop for Wasmi.
- ✨ Crate Features: learn about
wasmicrate features.
WebAssembly Features
| WebAssembly Proposal | WebAssembly Proposal | |||||
|---|---|---|---|---|---|---|
| ✅ | mutable-global |
≥ 0.14.0 |
✅ | custom-page-sizes |
≥ 0.41.0 |
|
| ✅ | saturating-float-to-int |
≥ 0.14.0 |
✅ | memory64 |
≥ 0.41.0 |
|
| ✅ | sign-extension |
≥ 0.14.0 |
✅ | wide-arithmetic |
≥ 0.42.0 |
|
| ✅ | multi-value |
≥ 0.14.0 |
✅ | simd |
≥ 0.43.0 |
|
| ✅ | bulk-memory |
≥ 0.24.0 |
✅ | relaxed-simd |
≥ 0.44.0 |
|
| ✅ | reference-types |
≥ 0.24.0 |
📅 | function-references |
Tracking Issue | |
| ✅ | tail-calls |
≥ 0.28.0 |
📅 | gc |
Tracking Issue | |
| ✅ | extended-const |
≥ 0.29.0 |
📅 | threads |
Tracking Issue | |
| ✅ | multi-memory |
≥ 0.37.0 |
📅 | exception-handling |
Tracking Issue |
| Embeddings | ||
|---|---|---|
| ✅ | WASI | WASI (wasip1) support via the wasmi_wasi crate. |
| ✅ | C-API | Official Wasm C-API support via the wasmi_c_api_impl crate. |
Used by
If you want your project on this list please inform me about you project and how Wasmi is used.
Sponsors
Special thanks to the past and present sponsors of the Wasmi project.
Supported Platforms
Wasmi supports a wide variety of architectures and platforms.
- Fore more details see this list of supported platforms for Rust.
- Wasmi supports
no_stdembedded environments, thus not requiring the standard library (std).
License
Licensed under either of
- Apache License, Version 2.0, (LICENSE-APACHE or https://www.apache.org/licenses/LICENSE-2.0)
- MIT license (LICENSE-MIT or https://opensource.org/licenses/MIT)
at your option.
Contribution
Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion in the work by you, as defined in the Apache-2.0 license, shall be dual licensed as above, without any additional terms or conditions.