WebAssembly Debugging with LLDB & WAMR

This post describes how to debug WebAssembly code running under the WebAssembly Micro Runtime (WAMR) on macOS. WAMR is a lightweight WebAssembly runtime designed for embedded and IoT applications, but its simplicity and debugging support make it well suited for general development. Building the WebAssembly Micro Runtime We have to build the runtime with debugging support. Start by cloning the wasm-micro-runtime repository and optionally checkout a specific release. $ git clone git@github....

August 6, 2025

WebAssembly Debugging

WebAssembly (Wasm) is a low-level binary instruction format. It was originally created to run in the browser, but has gained traction in many non-browser environments as well. Debugging WebAssembly applications presents unique challenges compared to traditional native code debugging. Unlike native executables that run directly on the processor, WebAssembly code executes within a virtual machine that abstracts away the underlying hardware. This abstraction, while providing portability and security benefits, complicates the debugging process because debuggers cannot rely on standard debugging techniques....

July 29, 2025