bneradt opened a new pull request, #12773:
URL: https://github.com/apache/trafficserver/pull/12773
# DO NOT MERGE
Adds bt to crashlog. Testing this with Serris's patch (#12669) since that
currently crashes in the CentOS build.
---
Previously, backtraces only appeared in crash logs when libunwind
(TS_USE_REMOTE_UNWINDING) was available. Without it, the crash log
would say 'Unable to retrieve backtrace' while the backtrace was
only written to stderr (traffic.out).
This change adds an in-process backtrace mechanism that:
- Generates a demangled backtrace from the crashing thread
- Sends it over the existing pipe to traffic_crashlog
- Uses it as a fallback when ServerBacktrace() fails
Changes:
- Add ink_stack_trace_get() to generate demangled backtraces using
abi::__cxa_demangle()
- Modify crash_logger_invoke() to capture and send the backtrace
- Update traffic_crashlog to read and include the in-process backtrace
- Use std::string for cleaner memory management
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