Rr 3.0 Released with x86-64 Support

As I previously had no idea what Rr is, I googled it a bit.

So for others: It's a tool to record executable execution and play it back later for debugging purposes.

http://rr-project.org/ http://rr-project.org/rr.html

As someone that works in R I find this fact funny that a language uses the name Rr. I can't image the pain of using Google to find an answer. I thought search Google with R was bad enough. R is also now 3.1 so that actually might hurt even more.

The rr-dev mailing list has this comment[0] from roc:

I expect rr 4.0 will be either ARM support or gdb reverse execution, whichever one is done first.

[0] https://mail.mozilla.org/pipermail/rr-dev/2014-December/0002...

How does this compare to reversible debugging in GDB? I guess it addresses the increased overhead (some say 1000x) that UndoDB tries to fix.

This sounds excellent, I'm looking forward to the next opportunity to give it a spin. The process tree aspect is particularly cool.

Awesome!