Core Files

on YouTube ↗20m

" summary

Production crashes leave a core file contains full process memory that can be inspected to recover exact JS state; using MDB v8 reconstructs JavaScript stacks reveals function frames and argument values, and cone/find tools report live objects so you can see which constructors hold memory. A demo shows parsed 62,000 JS objects in 4s and 14 in-flight HTTP client requests; LLDB plus a Python extension reproduces source and object inspection on OS X and enables cross‑target debugging for ARM devices.

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" chapters (4)

1. 0:00Start
2. 1:15Post-Mortem Analysis
3. 2:38Debug a Dynamic Language
4. 13:20Debugging Promises

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