# Aosp Runtime

> AOSP Part V — Runtime. Use when reasoning about ART (dex2oat, AOT/JIT, baseline profiles, GC, oat/vdex/odex files, class loaders, JNI bridge) or the Native Bridge (Berberis, Houdini, cross-architecture native code execution, intercepting libc/JNI calls). Chapters 18–19.

- Skill: `aospbooks/aosp-runtime` (Agent Skill)
- Install (CLI): `npx skillmds@latest add aospbooks/aosp-runtime`
- Raw SKILL.md: https://api.skillmd.com/api/skills/aospbooks/aosp-runtime/raw
- Safety review: pending
- Works with: Claude Code, Claude.ai, OpenAI Codex
- Category: Coding & Dev Tools
- Author: aospbooks (https://skillmd.com/u/aospbooks)
- Updated: 2026-09-17
- Page: https://skillmd.com/skills/aospbooks/aosp-runtime

---


# AOSP Part V — Runtime

The Android Runtime (ART) and the binary translation layer that lets
arm-only native code run on x86_64 devices.

## Chapters in this Part

- `18-art-runtime.md` — dex2oat, AOT/JIT, baseline profiles, GC (concurrent copying), oat/vdex/odex files, class loaders, JNI bridge
- `19-native-bridge.md` — cross-architecture native code execution, Houdini → Berberis, intercepting libc/JNI calls, performance trade-offs

## When to load which chapter

- Question mentions ART, dex2oat, AOT, JIT, baseline profiles, GC, oat/vdex/odex, JNI internals → `18-art-runtime.md`
- Question mentions Berberis, Houdini, native bridge, ARM-on-x86, binary translation → `19-native-bridge.md`