Xcode 16: why debug app for simulator contains additional App.dylib executable?

Generated on 9/26/2024

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In Xcode 16, the presence of an additional App.dylib executable when debugging an app for the simulator is related to improvements in the build and debugging process. Xcode 16 introduces explicit modules, which enhance parallelism, diagnostics, and debugging speed. These modules allow the debugger to reuse build outputs, leading to faster debugging sessions. The App.dylib might be part of these improvements, as it could be used to facilitate the debugging process by providing necessary symbols and modules in a more efficient manner.

For more details on these improvements, you can refer to the session What’s new in Xcode 16 (08:35) where the build process and debugging enhancements are discussed.

What’s new in Xcode 16

What’s new in Xcode 16

Discover the latest productivity and performance improvements in Xcode 16. Learn about enhancements to code completion, diagnostics, and Xcode Previews. Find out more about updates in builds and explore improvements in debugging and Instruments.

Demystify explicitly built modules

Demystify explicitly built modules

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Platforms State of the Union

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Run, Break, Inspect: Explore effective debugging in LLDB

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What’s new in Swift

What’s new in Swift

Join us for an update on Swift. We’ll briefly go through a history of Swift over the past decade, and show you how the community has grown through workgroups, expanded the package ecosystem, and increased platform support. We’ll introduce you to a new language mode that achieves data-race safety by default, and a language subset that lets you run Swift on highly constrained systems. We’ll also explore some language updates including noncopyable types, typed throws, and improved C++ interoperability.