Writing an Immutable WASM VM
The article describes the process and design decisions behind building an immutable WebAssembly (WASM) virtual machine. It explores how immutability constraints affect the implementation of WASM execution, including memory management, instruction processing, and the trade-offs involved in making the VM deterministic and verifiable.
Background
- **WASM (WebAssembly)** is a low-level, portable binary instruction format designed to run safely in browsers and other environments. It is widely used for near-native performance, sandboxed execution, and language interoperability (e.g., running C++ or Rust code in a web app).