rr v4.2.0 Release Notes
Release Date: 2016-03-17 // about 8 years ago-
Chaos mode added to catch hard-to-reproduce bugs.
โ Added support for using kernel ftrace while debugging rr itself.
๐ฒ Rework logging code so that logging can be turned on via RR_LOG environment variable or dynamically.
Reworked robust-futex handling.
โช Work around RDRAND usage in libstdc++3.
๐ Syscall support expanded.
๐ Many bugs fixed, particularly related to Ubuntu 14.04 and 15.10.