When the ObjC runtime indicates that it supports lazy realization, avoid forcing realization of classes while setting them up. This saves time and memory for classes that never touch the parts of the ObjC runtime that trigger realization
rdar://136102084
* Add non-inout `_withUnprotectedUnsafePointer`
For withUnsafePointer we have both an inout and a borrowing form, allowing it to be used with immutable values. Add a parallel form for the unprotected variant.
* Update LifetimeManager.swift
The Apple SDKs have been providing the Darwin overlay since macOS 10.14.4, iOS 12.2, et al. More recently the SDK version has diverged from the Swift version making them incompatible. Stop building the overlay from Swift. Once the SDK overlays aren't being built, the clang overlays need to be built in testing.
rdar://115192929
`_mangledTypeName()` returns the Swift-mangled typename of a given type. This PR extends it to take non-copyable types as well.
Related to our use case in Swift Testing, but not to the PR directly: #69146#69147#71112
Resolves rdar://134278607.
If you're using Rosetta 2, there are ARM64 threads in your process as
well, which the backtracer skips. Unfortunately doing that messed up
the crashing thread index, so the backtracer might have crashed or
told you that a different thread was crashing than the one you
thought.
This only affects running x86-64 code on an Apple Silicon Mac.
rdar://135787913
The `swift-backtracing` module is an executable rather than a library so it
should have no reason to use the deprecated `@_implementationOnly import` over
`internal import`.
The `_SwiftConcurrencyShims` module was imported `@_implementationOnly` which
was causing warnings to be emitted during the stdlib build. The module
currently serves no purpose; the only declaration it contains is a defunct
`_SwiftContext` struct which is not referenced by anything. The module needs to
continue to exist for source compatibility, though, since it is part of the
toolchain and imported publicly from other modules.
The Apple SDKs have been providing the Darwin overlay since macOS 10.14.4, iOS 12.2, et al. More recently the SDK version has diverged from the Swift version making them incompatible. Stop building the overlay from Swift. Once the SDK overlays aren't being built, the clang overlays need to be built in testing.
%target-swift-emit-pcm doesn't use the sdk, but %target-swift-frontend does, which will cause them to have a mismatch with "builtin headers belong to system modules, and _Builtin_ modules are ignored for cstdlib headers" aka LANGOPT(BuiltinHeadersInSystemModules) aka -fbuiltin-headers-in-system-modules.
rdar://115192929
The Concurrency runtime calculates deadlines for scheduling itself
using `swift_get_time()`; unfortunately, on Windows that was using
`QueryPerformanceCounter()`, while Dispatch uses
`QueryInterruptTimePrecise()`. The problem with that is that the two do
not necessarily correspond *at all*. In general
`QueryPerformanceCounter()` may be using any of a number of hardware
timers depending on the machine on which we're running.
In the VM I was testing on, the two differed by 20ms, but the worst case
is that they are completely unrelated, in which case `Task.sleep()` will
wait essentially a random amount of time.
rdar://135413803
Fields containing metatypes with no possible subtypes are thin i.e. they have no storage. There is only one possible value they can have: the corresponding type. Mirror attempted to copy the nonexistent field value from the nonexistent storage, producing garbage. Instead, special-case thin metatypes and copy the instance type out of the metatype metadata rather than trying to copy it from the field.
rdar://108280543
The current implementation creates a non-natural loop and none of the SIL and
LLVM loop passes will work for such loops. We have to find a way to fix this in
SIL. Until then, rewrite so we get a natural loop in SIL.
This function is an implementation detail of the runtime, not something that
clients of the _Concurrency library should be able to directly name. Make it
`@usableFromInline internal` instead of `public` so that it remains as ABI but
doesn't show up in auto-complete or documentation.
Some requirement machine work
Rename requirement to Value
Rename more things to Value
Fix integer checking for requirement
some docs and parser changes
Minor fixes
This is a follow-up after the change that enabled Cxx and CxxStdlib overlays on macCatalyst: https://github.com/swiftlang/swift/pull/74994.
The compiler relies on the presence of these shim libraries in the toolchain.
rdar://135275773
