tracing

strace is a diagnostic, debugging and instructional userspace utility for Linux

Color tracking with OpenCV and Qt Framework

Flowdar is an extensively documented toolset for understanding how computer programs work. In particular, Flowdar helps understand the flow of control and data, and understand resource usage by the application.

tracing system and library calls in linux and macos https://blog.xfbs.net/2018/02/22/tracing-linux-macos/