Annotate all of the `Unsafe*` types and `unsafe` functions in the standard
library (including concurrency, synchronization, etc.) as `@unsafe`. Add a
few tests to ensure that we detect uses of these types in clients that
have disabled unsafe code.
add_swift_target_library was missing pieces for passing sources and
flags to the static SDK build. As a result, the static SDK was missing
pieces (specifically Mutex).
Also adding the Musl import to the Linux Mutex implementation.
- when compiling embedded cross compile target standard libraries, include AVR
- add 16-bit pointer as a conditional compilation condition and get the void pointer size right for gyb sources
- attempt to fix clang importer not importing __swift_intptr_t correctly on 16 bit platforms
- changed the unit test target to avr-none-none-elf to match the cmake build
[AVR] got the standard library compiling in a somewhat restricted form:
General
- updated the Embedded Runtime
- tweaked CTypes.swift to fix clang import on 16 bit platforms
Strings
- as discussed in https://forums.swift.org/t/stringguts-stringobject-internals-how-to-layout-on-16-bit-platforms/73130, I went for just using the same basic layout in 16 bit as 32 bit but with 16 bit pointers/ints... the conversation is ongoing, I think something more efficient is possible but at least this compiles and will probably work (inefficiently)
Unicode
- the huge arrays of unicode stuff in UnicodeStubs would not compile, so I skipped it for AVR for now.
Synchronization
- disabled building the Synchronization library on AVR for now. It's arguable if it adds value on this platform anyway.
Use of atomics instructions requires the support of threads proposal and
it's not widely supported yet. So we should enable actual atomic
operations only when targeting wasm32-uknown-wasip1-threads.
This change fixes the following build error happening on Wasm:
```
error: referencing instance method '_wait(expected:)' on 'Atomic' requires the types '_MutexHandle.State' and 'UInt32' be equivalent
```
[stdlib] Pull back @_aeic on pointer → integer conversions
[stdlib] UnsafeMutablePointer.allocate: Fix thinko
[stdlib] Disable support for noncopyable pointees on some pointer operations
We have to temporarily pull back support for noncopyable pointees for UnsafeMutablePointer.initialize(to:), .moveInitialize, .moveUpdate, as the builtins they’re calling are no longer accepting such types.
These will return following a builtin audit.
[stdlib] Remove workarounds for certain builtins not supporting noncopyable use
https://github.com/apple/swift/pull/71733 fixed this!
[stdlib] Update FIXME
[stdlib] UnsafePointer: Update Swift version numbers
[stdlib] UnsafePointer: Actually hide legacy ABI
[stdlib] Remove workaround for U[M]BP.withMemoryRebound
This entails passing a linker flags to Apple linkers when the standard
library is not meant for inclusion in such cache.
For this to have effect on every library, propagate link flags when
building _Concurrency and Observation.
This is needed for Apple internal configurations.
Addresses rdar://120653968
