Xref Aosp — Fixed

在 ActivityManager.java 的源码页面中，找到声明 native 关键字的函数。在官方的 cs.android.com 上，你可以直接 Ctrl+Click 或点击函数名，系统会提供跳转链接，直接指向 android_util_Process.cpp 中的 JNI 实现。

[Application Layer] -> Context.getSystemService() │ ▼ [Framework Layer] -> Binder IPC Interface │ ▼ [Native C++ Layer] -> JNI Execution / Native Daemon │ ▼ [Kernel Space] -> System Drivers (ioctl) xref aosp

Compare how a specific file has changed across different Android versions (e.g., from Android 10 to Android 14/15/16). 在 ActivityManager

: There it was. A legacy "TODO" comment from 2014, left by a developer who had long since moved on. A race condition hidden in plain sight, invisible to standard compilers but laid bare by the interconnected web of the cross-reference. A race condition hidden in plain sight, invisible

The best resource to understand and master this tool is the official Google documentation: . Why this is the "Good Article" you need: