search for: __objc_selref

...00 has been updated. The new version contains a MachOPlatform implementation that demonstrates how Platforms and ObjectLinkingLayer::Plugins can work together to implement platform specific initialization. In this case, the MachOPlatform installs a plugin that scans objects for __objc_classlist and __objc_selref sections and uses them to register JIT'd code with the Objective-C runtime. This allows LLJIT instances (and the lli command line tool) to run IR compiled from Objective-C and Swift sources. Discussion on the review is ongoing (thanks especially to Stefan Granitz for his review comments!) but...

...the other hand, MachOPlatform implements a scheme that mimics the behavior of the Darwin dynamic loader, dyld: By installing an ObjectLinkingLayer::Plugin, the MachOPlatform can scan all objects as they are materialized to discover known special sections (E.g. __mod_init_func, __objc_classlist, and __objc_selref), then handle them according the usual platform rules (__mod_init_func pointers are executed, Objective-C classes and selectors are registered with the Objective-C runtime). While this system is still very new, it is far enough along that the lli command line tool, when run with the -jit-mode=orc-...