version: "1.0.2" name: aosp-native-foundation description: | AOSP Part III — Native Foundation. Use when reasoning about Bionic (Android's libc/libm/libdl) and the dynamic linker, linker namespaces, GWP-ASan / MTE, memory management (jemalloc/scudo, ashmem/memfd, ION/dma-buf, lmkd, PSI), Binder IPC (transactions, parcels, one-copy semantics, AIDL/HIDL/NDK Binder, servicemanager, threadpool, death recipients), the HAL (Treble, HIDL→AIDL HAL migration, vendor/system split, hwservicemanager, VINTF), or the NDK (libandroid, JNI bindings, ABI compatibility). Chapters 7–11. metadata: author: 'utzcoz' version: '2026.06.24' last-updated: '2026-09-12'

AOSP Part III — Native Foundation

The C/C++ layer that everything above sits on: libc, the dynamic linker, memory infrastructure, the IPC backbone (Binder), the vendor/system contract (HAL/Treble), and the NDK that exposes a subset of native APIs to apps.

Chapters in this Part

• 07-bionic-and-linker.md — Bionic libc/libm/libdl, linker64, namespaces, GWP-ASan / MTE, app_process
• 08-memory-management.md — jemalloc/scudo, ashmem/memfd, ION/dma-buf, lmkd, PSI, kswapd, OOM adjustments
• 09-binder-ipc.md — /dev/binder, parcels, transactions, one-copy semantics, AIDL/HIDL/NDK Binder, servicemanager, threadpool, death recipients
• 10-hal.md — Treble, HIDL→AIDL HAL migration, vendor/system partition split, hwservicemanager vs. servicemanager, VINTF
• 11-ndk.md — native APIs exposed to apps, libandroid, JNI bindings, ABI compatibility, sysroot layout

When to load which chapter

• Question mentions libc, linker, namespaces, MTE, GWP-ASan, app_process → 07-bionic-and-linker.md
• Question mentions LMK, jemalloc, scudo, ION, dma-buf, PSI, OOM → 08-memory-management.md
• Question mentions Binder, parcels, AIDL, HIDL, NDK Binder, servicemanager, one-copy → 09-binder-ipc.md
• Question mentions Treble, HAL, VINTF, vendor partition, hwservicemanager → 10-hal.md
• Question mentions NDK, libandroid, JNI, sysroot, ABI → 11-ndk.md