# DynamoRIO/dynamorio

Dynamic Instrumentation Tool Platform

Repository: https://github.com/DynamoRIO/dynamorio
Canonical: https://ross.abutalabs.com/products/dynamorio
Language: C
License: NOASSERTION
License Family: other
Topics: dynamorio, instrumentation, linux, windows, profiling, analysis-framework, toolkit, cache-simulator, simulator, binary-analysis
Last push: 2026-08-26T22:29:51+00:00

## Health v2 (maintenance only)
Score: 95/100 (v2, computed 2026-09-03T02:39:23.370411+00:00)
- activity 99, release rhythm 87, longevity 100
- inputs: {"age_days": 4297, "days_push": 7, "days_rel": 11, "gap_med": 6, "n_releases_24m": 108}
- 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 3146, forks 622 (observed 2026-08-28T04:07:45.995741+00:00)

## What it is
DynamoRIO is a runtime code manipulation system that supports arbitrary code transformations on executing programs, with a powerful instruction manipulation library for IA-32, AMD64, ARM, and AArch64. It serves as a platform for building dynamic tools such as profilers, fuzzers, memory debuggers, and cache simulators on unmodified applications.

## Use cases
- instrument a program at runtime for profiling
- fuzz Windows binaries with code coverage feedback
- simulate CPU caches and TLBs from instruction traces
- trace memory addresses and function calls of an application
- detect memory errors in unmodified binaries
- analyze opcode mixes and reuse distances of a workload

## When to choose
- you need fine-grained dynamic binary instrumentation on x86, ARM, or AArch64
- you want to build custom program analysis or profiling tools
- you need to instrument unmodified applications on Windows, Linux, or Android
- you need an instrumentation engine for a fuzzer like WinAFL

## When to avoid
- you only need simple static analysis of binaries
- you want source-level instrumentation rather than binary-level
- you need macOS support, which is still in progress
- you need a lightweight sampling profiler without deep instrumentation

## Facets
- artifact type: framework
- maturity: active
- function: benchmarking, fuzzing, reverse-engineering, simulation, tracing
- domain: developer-tools, performance, security, operating-systems
- platform: windows, cpp, c
- tags: dynamic-binary-instrumentation, binary-analysis, code-coverage, cache-simulator, memory-debugging, runtime-code-manipulation, instrumentation, linux, android

## Member repositories
- DynamoRIO/dynamorio (main) score 95

## Provenance
- Observed fields: from GitHub, fetched 2026-08-28T04:07:45.995741+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 2026-08-30T07:25:57.131823+00:00, confidence not recorded.
  - readme: https://github.com/DynamoRIO/dynamorio (fetched 2026-08-28T04:07:45.995741+00:00, sha 007f1a2569a0)
- Data as of 2026-08-30T08:39:29.467469+00:00.