Writing A Wasm Runtime In Rust

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2024-04-27 03:30:02

With a Runtime environment, Wasm binaries can be executed not only in browsers but also on the server-side. For example, Wasm can be adopted in an application's plugin system or utilized in serverless application development.

The interest in Wasm, which is expected to continue to grow, is likely shared by many who are curious about its operation principles. In this document, after introducing Wasm and explaining its use cases, we aim to understand the operational principles by implementing a small Runtime from scratch using Rust to output Hello World.

Even though understanding a small Runtime may require some effort, we will explain each aspect step by step, so let's proceed together without rushing.

By the way, the Runtime to be implemented adheres to the specifications of version 1 (specification). The specification may be challenging to read, but for those interested, we encourage you to continue implementing based on the explanations provided in this document.

The manuscript of this document is available in this repository, so if you find any confusing parts or strange explanations, please submit a pull request.