rr 4.0.0-1 (amd64 binary) in ubuntu xenial

 rr allows application executions to be recorded and then replayed
 with gdb as many times as desired.
 .
 This allows intermittent, or complex to reproduce, bugs to be
 captured and then debugged at leisure. Replays are deterministic,
 always identical from one run to another.
 .
 rr is incompatible with ptrace hardening, and currently only supports
 Intel Nehalem, Westmere, Sandy Bridge, Ivy Bridge, Haswell and
 Broadwell CPUs.