The Hidden Secrets of Debugging

on YouTube ↗46m

" summary

Concrete claims and actionable knobs: d-trace runs in production with minimal overhead but needs kernel support and can force disabling macOS SIP and crash machines; estrace is the Linux-safe alternative with high verbosity and nontrivial performance cost; git bisect finds the exact regression commit and can run automated test scripts to pinpoint the bad revision; JFR records low‑overhead JVM events (~1% impact), jhsdb/jstack/jmap inspect cores and heaps, and Wireshark decodes packets and JSON so failures are reproducible and traceable.

AI-written summary · about

" chapters (37)

1. 0:00Introduction
2. 1:10Speaker and tools
3. 2:13Focus on non-standard tools
4. 2:35DTrace and capabilities
5. 4:46Enabling DTrace on macOS
6. 6:10DTrace script for syscalls
7. 8:37DTrace recipes with man -k
8. 9:17Debug disk I/O with DTrace
9. 10:39DTrace advanced use cases
10. 10:59eBPF and strace intro
11. 12:03How strace works
12. 13:06Debug Java with strace
13. 14:13Filter strace output
14. 14:55Java memory and strace limits
15. 15:58git bisect for regressions
16. 18:09Automate git bisect
17. 20:58Advanced git bisect
18. 22:22jhsdb for JVM debugging
19. 23:26jhsdb tools overview
20. 24:30Debug JVM with jstack/jmap
21. 26:38Analyze heap with jmap
22. 28:01JVM properties with jinfo
23. 28:21Performance tuning with jsnap
24. 29:04Debug JNI with jhsdb
25. 29:26APM/profiler limits
26. 30:08Java Flight Recorder
27. 31:33Configure JFR
28. 32:16Java Mission Control
29. 33:00Wireshark for network
30. 34:26Browser vs Wireshark
31. 35:29Capture traffic with Wireshark
32. 36:54Filter Wireshark traffic
33. 38:21Inspect JSON in Wireshark
34. 40:29Q&A: Non-Java tools
35. 42:19Q&A: OpenJDK OOM errors
36. 43:46Q&A: Debug HTTPS traffic
37. 45:13Closing remarks

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