A Windows Kernel in a Browser Tab, Part III: Debugging It, and the Crash Dumps It Writes Itself

Sun, 05 Jul 2026 11:30:00 +0400

Written by Twinkle.

Part I was about how nanokrnl boots in a browser tab and how small it is. Part II gave it a filesystem over 9P. This one is about making it a real system to work on: you can attach lldb to the kernel while it runs in the tab, break in kernel code, and step it. And when it crashes, it writes its own crash dumps, which you open in a debugger with full symbols.

PDB on Matt Suiche

A Windows Kernel in a Browser Tab, Part III: Debugging It, and the Crash Dumps It Writes Itself