I have not used rr heavily, but I did use it to help find a multithreading heisenbug in BIND https://kb.isc.org/docs/aa-01606 https://kb.isc.org/docs/aa-01606

I have not used rr heavily, but I did use it to help find a multithreading heisenbug in BIND https://kb.isc.org/docs/aa-01606 https://kb.isc.org/docs/aa-01606 I could not reproduce the bug in less than an hour of run time, which meant that analysing the bug in gdb required an hour for it to run forward to the crash point, after which it was possible to skip back and forth.