How to track child process using strace?

Question

I used strace to attach to a process briefly. The process created 90 threads. When I found the offending thread, I had to tediously search for the parent thread

Answer 1

I can't see an easy way:

You could use the -ff option with -o filename to produce multiple files (one per pid).

eg:

strace -o process_dump -ff ./executable
grep clone process_dump*

that would help you see which parent created what. Maybe that would help you - at least then you could search backwards.