rr debbugger

[Aurélien Aptel]

Hi,

There is a group of people at mozilla working on a very interesting
project, the rr debugger. It allows you to record the non-deterministic
parts of a program run (syscall results) and replay them
deterministicly. This means you can finally use breakpoints without
trigerring timeouts on the client side. You can also reverse-debug:
start from the crash and go backward.

It wasn't working on smbd but after opening a couple of issues and
working on one I was able to use it. Other syscall might have to be
implemented depending on what you try to run.

http://rr-project.org/

You might want to pull from here to get an extra quotactl syscall
implemented:

https://github.com/aaptel/rr.git on the branch quotactl-xgetqstat

Cheers,

-- 
Aurélien Aptel / SUSE Labs Samba Team
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