[5.0][runtime] Register a hook for class name lookup from libobjc (#20650) #20894
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…ng#20650) libobjc needs to look up classes by name. Some Swift classes, such as instantiated generics and their subclasses, are created only on demand. Now a by-name lookup from libobjc counts as a demand for those classes. rdar://problem/27808571
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@swift-ci please test |
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@apple/swift5-branch-managers Not critical for convergence. This change does not affect ABI directly. It fixes a new regression introduced by resilience, and a related long-standing bug. |
bob-wilson
approved these changes
Dec 5, 2018
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libobjc needs to look up classes by name. Some Swift classes, such as
instantiated generics and their subclasses, are created only on demand.
Now a by-name lookup from libobjc counts as a demand for those classes.
rdar://problem/27808571