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Tech riderRev. 20 Sept 2026

rr

Ch 245.6of 27 Debuggers
  1. 1Runs onLinux
  2. 2CostsNot stated by the maker
  3. 3Supported languagesC, C++, Go
  4. 4Target platformsLinux
  5. 5Time-travel debuggingYes
4 lines stated Written from the maker's own pages: rr-project.org
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The rr homepage

Overview

rr is ranked #24 of 27 in debuggers on Specifiction. It runs on Linux.

Compared on debuggers

Supported languages
C, C++, Gorr-project.org
Target platforms
Linuxrr-project.org
Time-travel debugging
Yesrr-project.org

Facts

Purpose
rr records application executions and replays them deterministically for debugging.rr-project.org · 4 Oct 2026
Reverse execution
rr supports reverse execution under gdb, including reverse execution to breakpoints and data watchpoints.rr-project.org · 4 Oct 2026
Workloads
rr can record and replay multi-process workloads, including entire containers.rr-project.org · 4 Oct 2026
Trace portability
The site describes rr traces as durable, compact, and portable between machines.rr-project.org · 4 Oct 2026
Supported applications
The site lists Firefox, Chrome, QEMU, LibreOffice, and Go programs as examples of supported application types.rr-project.org · 4 Oct 2026
IDE integrations
The IDE guide lists Visual Studio Code, CLion, QtCreator, Eclipse, Emacs GUD/gdb-mi, NeoVim, gdbgui, and Seer as known to work with rr.github.com · 4 Oct 2026
GDB interface
rr implements the standard gdb server interface and can also present the gdb command-line interface.github.com · 4 Oct 2026
Installation
The site provides Fedora and Ubuntu package installation instructions and recommends building from source if packages do not work.rr-project.org · 4 Oct 2026
Hardware requirements
The repository lists supported Intel Nehalem-or-later, certain AMD Zen-or-later, and certain AArch64 CPUs, including Apple Silicon M-series.github.com · 4 Oct 2026
Kernel requirement
The repository lists Linux kernel 4.7 or later as a system requirement.github.com · 4 Oct 2026
Limitations
rr emulates a single-core machine, cannot record processes sharing memory with processes outside the recording tree, and does not support every system call.rr-project.org · 4 Oct 2026
Community support
The site directs users to the mailing list and #rr on chat.mozilla.org for questions.rr-project.org · 4 Oct 2026
Development
The repository says rr originated at Mozilla and development is sponsored by Pernosco.github.com · 4 Oct 2026

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Where it ranks on Specifiction

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Sources