# rr-debugger/rr

Record and Replay Framework

Repository: https://github.com/rr-debugger/rr
Canonical: https://ross.abutalabs.com/products/rr
Homepage: http://rr-project.org/
Language: C++
License: NOASSERTION
License Family: other
Topics: debugger, gdb, reverse-execution, linux
Last push: 2026-08-16T23:05:58+00:00

## Health v2 (maintenance only)
Score: 67/100 (v2, computed 2026-09-03T02:20:16.233290+00:00)
- activity 98, release rhythm 8, longevity 100
- inputs: {"age_days": 5487, "days_push": 17, "days_rel": 566, "gap_med": null, "n_releases_24m": 1}
- flags: no_license
- formula: round(0.45*activity + 0.35*rhythm + 0.20*longevity); archived -> min(score, 10)

## Adoption (not part of the score)
Stars 10630, forks 663 (observed 2026-08-28T04:10:43.604026+00:00)

## What it is
rr is a lightweight record-and-replay framework for Linux that captures the full execution of applications (process and thread trees) and replays it deterministically. It extends gdb with efficient reverse-execution, letting developers debug recorded failures repeatedly with breakpoints and data watchpoints.

## Use cases
- debug an intermittent crash by recording it once and replaying deterministically
- reverse-execute under gdb to find where memory was corrupted
- reproduce a race condition reliably using chaos mode
- debug multi-process workloads including containers
- share compact execution traces between machines for collaborative debugging

## When to choose
- you debug C/C++ programs on Linux with hard-to-reproduce bugs
- you need deterministic replay and reverse execution with gdb integration
- you want low-overhead recording of single-threaded or multi-threaded workloads

## When to avoid
- you need a debugger on Windows or macOS
- your CPU lacks Intel Nehalem+, supported AMD Zen, or AArch64 performance counters
- you run on Xen or a VM without hardware performance counter virtualization

## Facets
- artifact type: cli-tool
- maturity: active
- function: testing, developer-tools, reverse-engineering
- domain: developer-tools, operating-systems
- platform: cli
- tags: record-and-replay, reverse-execution, gdb, deterministic-debugging, debugger, debugging, linux

## Member repositories
- rr-debugger/rr (main) score 67

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:10:43.604026+00:00.
- Health v2: computed from the inputs above; adoption is never an input.
- Inferred fields (summary, facets, guidance): AI-extracted, prompt v1, taxonomy v1, on 2026-08-29T17:18:27.387614+00:00, confidence not recorded.
  - readme: https://github.com/rr-debugger/rr (fetched 2026-08-28T04:10:43.604026+00:00, sha 0e0405ea1c7f)
  - homepage: http://rr-project.org/ (fetched 2026-08-29T08:17:25.296886+00:00, sha da51168b08f4)
- Data as of 2026-08-30T08:39:29.467469+00:00.