Have the Concurrency runtime register a struct containing pointers to all of its type descriptors with standard manglings. Then have the runtime use that struct to quickly look up those types, instead of using the standard, slower type lookup code.
rdar://109783861
For now this has SWIFT_RUNTIME_LIBRARY_VISIBILITY, but in the
future we might want to make it public so that IRGen can use it
to build packs out of concrete types.
This adds a bunch of new code but once I finish refactoring the other
demangling stuff, I should be able to remove
- gatherWrittenGenericArgs()
- _gatherGenericParameters()
- SubstGenericParametersFromWrittenArgs
We crash in ResolveAsSymbolicReference::operator() when a symbolic reference targets a missing symbol. We usually have very little information about what was missing when this happens. Instead of crashing, explicitly check for NULL and fatal error in that case, including information about the location of the symbolic reference that it came from.
If the replaced symbol goes away in the original library, the
replacement key in the replacement descriptor will be null. Handle this
by ignoring the replacement entry rather than crashing.
rdar://103307821
Upgrade the old mangling from a list of argument types to a
list of requiremnets. For now, only same-type requirements
may actually be mangled since those are all that are available
to the surface language.
Reconstruction of existential types now consists of demangling (a list of)
base protocol(s), decoding the constraints, and converting the same-type
constraints back into a list of arguments.
rdar://96088707
Implement casting to and from extended existentials. This is done by slightly generalizing the conditional conformances checking infrastructure.
Unfortunately, casts for reference types and metatypes are unsound because IRGen is peepholing all non-opaque existential conversions with a helper. I’ll disable that in a follow-up.
rdar://92197049
Moved all the threading code to one place. Added explicit support for
Darwin, Linux, Pthreads, C11 threads and Win32 threads, including new
implementations of Once for Linux, Pthreads, C11 and Win32.
rdar://90776105
The operator new/delete overrides aren't working out due to inconsistent inlining of std::string creation/deletion. We can end up creating one with the global new but destroying it with our local delete. If they aren't compatible, this crashes.
Instead, avoid problematic new/delete activity coming from lookup of ObjC class names. Names passed to getObjCClassByMangledName must either have a standard mangled name prefix, start with a digit (for unprefixed mangled names) or use the convenience dot syntax. Check for those up front and immediately reject anything else. This has the added bonus of failing more quickly for non-Swift names.
rdar://93863030
Moved all the threading code to one place. Added explicit support for
Darwin, Linux, Pthreads, C11 threads and Win32 threads, including new
implementations of Once for Linux, Pthreads, C11 and Win32.
rdar://90776105
Add requirements to the Builder concept to construct generic signatures and substitution maps. Then introduce a `subst` requirement that uses the substitution map to call through to the builder's notion of type (ref) substitution.
This infrastructure is sufficient to model the notion of a RuntimeGenericSignature.
Apply a blanket pass of including `new` for the placement new allocation
and namespacing the call to the global placement new allocator. This
should repair the Android ARMv7 builds.
When SWIFT_COMPACT_ABSOLUTE_FUNCTION_POINTER is enabled, relative direct
pointers whose pointees are functions will be turned into absolute
pointer at compile-time.
