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linux-kernel-module-cheat/record-and-replay.md
2017-11-09 21:03:12 +00:00

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# Record and replay
QEMU supports deterministic record and replay by saving external inputs, which would be awesome to understand the kernel, as you would be able to examine a single run as many times as you would like.
Unfortunately it is not working in the current QEMU: <https://stackoverflow.com/questions/46970215/how-to-use-qemus-deterministic-record-and-replay-feature-for-a-linux-kernel-boo>
Alternatively, [`mozilla/rr`](https://github.com/mozilla/rr) claims it is able to run QEMU: but using it would require you to step through QEMU code itself. Likely doable, but do you really want to?