Firefox Developers Introduce RR C/C++ Debugger
Written by Michael Larabel in Mozilla on 26 March 2014 at 11:54 AM EDT. 4 Comments
Mozilla
Mozilla developers working on the Firefox web-browser have introduced a new debugger they developed when working on the browser itself.

RR is the new project and isn't a web-debugger but was developed in the process of debugging Firefox issues. RR is short for record and replay, two strengths of this debugger compared to other debuggers. RR is aimed at C/C++ debugging of Firefox on Linux at the moment. While RR is being improved upon, it's not yet recommended for general purpose C/C++ debugging outside of Firefox on large projects. RR lets the developer use GDB to debug during the replay process, of a record captured by RR of a series of program sequences.

The RR project site explains, "rr aspires to be your primary debugging tool, replacing — well, enhancing — gdb. You record a failure once, then debug the recording, deterministically, as many times as you want. Every time the same execution is replayed."

Other details on RR can be found via this blog post by Robert O'Callahan.
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Michael Larabel is the principal author of Phoronix.com and founded the web-site in 2004 with a focus on enriching the Linux hardware experience and being the largest web-site devoted to Linux hardware reviews, particularly for products relevant to Linux gamers and enthusiasts but also commonly reviewing servers/workstations and embedded Linux devices. Michael has written more than 10,000 articles covering the state of Linux hardware support, Linux performance, graphics hardware drivers, and other topics. Michael is also the lead developer of the Phoronix Test Suite, Phoromatic, and OpenBenchmarking.org automated testing software. He can be followed via Twitter or contacted via MichaelLarabel.com.

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