The following free platforms allow you to search and browse AOSP source code with cross-referencing: Android Code Search (cs.android.com)
He patched the Evergreen server in fifteen minutes. Not by rewriting the memory allocator, but by restoring the original cross-reference links that the corporate forks had deliberately broken. The heap stopped leaking. The mesh network hummed back to life—a quiet, ad-hoc constellation of old phones, e-readers, and car dashboards, all talking in the clean, simple protocol of the original AOSP handshake. xref aosp free