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dyld in depth: chained fixups, prebuilt loaders, and dlopen internals
Inside dyld — Loader data structures, the modern chained-fixups format, PrebuiltLoaders in the shared cache, and what dlopen actually does at runtime.
bsddyldloadermach-o
libdispatch internals: how GCD actually dispatches your blocks
Dispatch queues, the workqueue thread pool, voucher adoption, async vs sync — what happens between your dispatch_async call and your block running on a worker thread.
bsdlibdispatchgcdconcurrency