1 views collected around this technical thread.
This article examines how ARC‑managed object assignments can produce wild pointers and EXC_BAD_ACCESS crashes in multithreaded iOS apps, explains the underlying reference‑counting steps, demonstrates reproducible demo scenarios, and offers practical mitigation strategies for developers.
This article provides an in‑depth technical overview of the ld64 static linker used in iOS builds, explaining its architecture, how it parses .o, .a and .dylib files, manages symbols, atoms and fixups, resolves undefined references, performs dead‑code stripping, and generates the final executable.
This comprehensive guide explains the inner workings of Apple's ld64 static linker for iOS, covering its historical background, core concepts such as objects, archives, symbols, and fixups, command‑line parameters, execution phases, symbol resolution, dead‑code stripping, optimization passes, output generation, auto‑linking, the -ObjC flag, debugging options, and LTO support.
The article describes how enabling the aggressive size‑optimisation flag -Oz in Clang caused a video component to create numerous GLFramebuffer and CVPixelBuffer objects, leading to OOM crashes, and explains the underlying ARC and Machine Outliner interactions that exposed a compiler bug which was later fixed in LLVM.