b98a22e3f9
For every sx-defined '#objc_class', emit a module-init constructor
that registers the class with the Obj-C runtime at module load.
Pattern mirrors the Phase 3.1 emitObjcClassInit companion:
'@llvm.global_ctors' + ORC-JIT main injection.
Constructor body, per cache entry:
super = objc_getClass("<ParentName>") // default NSObject
cls = objc_allocateClassPair(super, "<ClassName>", 0)
objc_registerClassPair(cls)
Parent is read from the foreign_class_decl's '.extends' member;
absent ⇒ NSObject (matches M1.2 A.0 spec). Class-name strings
go through new emitPrivateCString helper that mirrors the
selector-init / class-init shape.
Two new small helpers extracted while we were here:
- lazyDeclareCRuntime — declare-once extern wrapper for Obj-C
runtime APIs.
- appendModuleCtor — append-or-create global_ctors + ORC-JIT
injection, factored out of emitObjcClassInit.
143-objc-class-registration.sx exercises the round-trip on
macOS: after main starts, objc_getClass("SxFoo".ptr) returns
non-null. Runs against the real Obj-C runtime.
142's IR snapshot updated — the constructor + ctors metadata
are now part of the expected shape.
DEFERRED (A.4b): method-IMP registration (class_addMethod with
a C-ABI trampoline that reads __sx_state ivar and calls the sx
body). DEFERRED (A.5+): synthesized +alloc / -dealloc IMPs and
the '__sx_state' ivar setup.
172 example tests pass (+1 from 143). zig build test green.
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