Wasm core dumps and debugging Rust in Cloudflare Workers
Debugging Rust and Wasm with Cloudflare Workers involves a lot of the good old time-consuming and nerve-wracking printf'ing strategy. What if there’s a better way? This blog is about enabling and using Wasm core dumps and how you can easily debug Rust in Cloudflare Workers
WebAssembly (Wasm) is a binary instruction format used for high-performance applications in web and serverless environments. Debugging Wasm with Cloudflare Workers can be challenging, but a proposal for implementing core dumps in WebAssembly has been introduced. Core dumps capture program state during a crash and provide valuable information for post-mortem debugging. A polyfill called wasm-coredump-rewriter can be used to inject core dump functionality into Wasm modules. Cloudflare has also open-sourced the Wasm Coredump Service for collecting and parsing core dumps from projects on Cloudflare Workers.
