[X-ray] How to trace into intrumented runtime lib with xray

Hi all,

Thanks for open-sourcing Xray. It is awesome.
I am using Xray to trace the function calls in a binary and I got the log.
However, I found the function calls in the runtime libs used by the binary were not recorded (I also instrumented this lib).
I am wondering how can I trace a particular runtime lib which is used by the tested binary?

Best regards,
Feng