[Performance Analysis] print stderr if exists by lichao127 · Pull Request #8600 · osquery/osquery
This pull request adds a print of stderr if it exists during performance analysis. This improves the readability of the performance analysis output.
For example, without printing stderr, the output will look like this:
$ sudo -E python ./tools/analysis/profile.py --query 'SELECT * FROM system_info;' Profiling query: SELECT * FROM system_info; U:3 C:3 M:3 F:3 D:3 manual (1/1): utilization: -1 cpu_time: -1 memory: -1 fds: -1 duration: -1
With stderr printing:
Profiling query: SELECT * FROM system_info; Error: E0417 14:42:06.650187 3823731 virtual_table.cpp:1052] Exception while executing table system_info: Cannot get database value: host_uuid_v3 Query failed (1): Cannot get database value: host_uuid_v3 U:3 C:3 M:3 F:3 D:3 manual (1/1): utilization: -1 cpu_time: -1 memory: -1 fds: -1 duration: -1
Osquery doc reference: https://osquery.readthedocs.io/en/stable/deployment/performance-safety/#understanding-the-output-from-profilepy
Related issue: #8538