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R&R is a regular part of the publication process, together with “in process”, “in review”, “accepted with revisions” and “in press” ( Rocco, 2011 ). It presents itself in many ways and should be faced as an ordinary part of the researcher’s life.
Set breakpoints and data watchpoints and quickly reverse-execute to where they were hit. rr works on real applications and is used by many developers to fix real bugs. It makes debugging hard bugs much easier, but also speeds up debugging of easy bugs. Low overhead compared to other similar tools, especially on mostly-single-threaded workloads
rr records a group of Linux user-space processes and captures all inputs to those processes from the kernel, plus any nondeterministic CPU effects performed by those processes (of which there are very few). rr replay guarantees that execution preserves instruction-level control flow and memory and register contents.