Tools and Techniques to Debug an Embedded Linux System
Talkat Embedded Linux Conference @ Open Source Summit North America 2022 · on Wednesday, 2022-06-22· at 13:45· Griffin Hall (Level 2), JW Marriott Austin, 110 E 2nd Street Austin, TX 78701·
summary
Booting a tiny board over NFS and injecting bugs yields concrete recipes: recover kernel oops by using vmlinux plus addr2line to map the crash address to a source line, inspect user-space crashes by enabling core dumps with ulimit and opening the core with gdb tui, trace a 4s LED delay to an intentional msleep using ftrace/trace-cmd/kernelshark, find a netcat bind error by running strace to reveal the wrong sockaddr parameter, and use gdb + gdbserver or perf uprobes for live stepping and function-level tracing.
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chapters (14)
- 0:00Start
- 3:08Presentation
- 8:07Understanding the Problem
- 10:43Resource Leakage
- 11:52Categories of Tools and Techniques
- 12:35Tracing Profiling
- 13:19Interactive Debugging
- 13:44Debugging Frameworks
- 14:19Post-Mortem Analysis
- 15:47Kernel Ops Message Crashing the Kernel
- 25:21Tui
- 28:40F Trace
- 31:56Trace Cmd
- 39:03Gdb
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