nginx-c-module-debugging
nginx.org C Module Debugging Best Practices
Comprehensive debugging guide for nginx C modules, derived from the official nginx development documentation and production debugging experience. Contains 45 rules across 8 categories, prioritized by impact to guide systematic diagnosis of crashes, memory bugs, and behavioral issues in nginx modules.
Companion skills: This skill complements nginx-c-module-best-practices (correctness) and nginx-c-module-perf-reliability (performance). This skill covers debugging and diagnosis.
When to Apply
Reference these guidelines when:
- Diagnosing nginx worker crashes (segfaults, SIGABRT, SIGSEGV)
- Finding memory bugs (use-after-free, leaks, pool corruption, buffer overruns)
- Setting up GDB and core dump analysis for nginx
- Tracing request flow through phases, subrequests, and filter chains
- Instrumenting nginx modules with debug logging and dynamic tracing tools
Rule Categories by Priority
| Priority | Category | Impact | Prefix |
|---|
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