mirror of
https://github.com/apple/swift.git
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0ec13f9a90
Remove dependency on macros from compiler and stdlib build when bootstrapping the compiler without Swift available.
261 lines
9.4 KiB
Swift
261 lines
9.4 KiB
Swift
//===----------------------------------------------------------------------===//
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//
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// This source file is part of the Swift.org open source project
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//
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// Copyright (c) 2014 - 2017 Apple Inc. and the Swift project authors
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// Licensed under Apache License v2.0 with Runtime Library Exception
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//
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// See https://swift.org/LICENSE.txt for license information
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// See https://swift.org/CONTRIBUTORS.txt for the list of Swift project authors
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//
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//===----------------------------------------------------------------------===//
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import SwiftShims
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/// Returns 1 if the running OS version is greater than or equal to
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/// major.minor.patchVersion and 0 otherwise.
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///
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/// This is a magic entry point known to the compiler. It is called in
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/// generated code for API availability checking.
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///
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/// This is marked @_transparent on iOS to work around broken availability
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/// checking for iOS apps running on macOS (rdar://83378814). libswiftCore uses
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/// the macOS platform identifier for its version check in that scenario,
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/// causing all queries to return true. When this function is inlined into the
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/// caller, the compiler embeds the correct platform identifier in the client
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/// code, and we get the right answer.
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///
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/// @_transparent breaks the optimizer's ability to remove availability checks
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/// that are unnecessary due to the current deployment target. We call through
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/// to the _stdlib_isOSVersionAtLeast_AEIC function below to work around this,
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/// as the optimizer is able to perform this optimization for a
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/// @_alwaysEmitIntoClient function. We can't use @_alwaysEmitIntoClient
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/// directly on this call because it would break ABI for existing apps.
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///
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/// `@_transparent` breaks the interpreter mode on macOS, as it creates a direct
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/// reference to ___isPlatformVersionAtLeast from compiler-rt, and the
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/// interpreter doesn't currently know how to load symbols from compiler-rt.
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/// Since `@_transparent` is only necessary for iOS apps, we only apply it on
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/// iOS, not any other which would inherit/remap iOS availability.
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#if os(iOS) && !os(visionOS)
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@_effects(readnone)
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@_transparent
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@_noLocks
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public func _stdlib_isOSVersionAtLeast(
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_ major: Builtin.Word,
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_ minor: Builtin.Word,
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_ patch: Builtin.Word
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) -> Builtin.Int1 {
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return _stdlib_isOSVersionAtLeast_AEIC(major, minor, patch)
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}
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#else
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@_semantics("availability.osversion")
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@_effects(readnone)
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@_unavailableInEmbedded
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#if hasFeature(Macros)
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@_noLocks
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#endif
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public func _stdlib_isOSVersionAtLeast(
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_ major: Builtin.Word,
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_ minor: Builtin.Word,
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_ patch: Builtin.Word
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) -> Builtin.Int1 {
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return _stdlib_isOSVersionAtLeast_AEIC(major, minor, patch)
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}
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#endif
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@_semantics("availability.osversion")
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@_effects(readnone)
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@_alwaysEmitIntoClient
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#if hasFeature(Macros)
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@_noLocks
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#endif
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public func _stdlib_isOSVersionAtLeast_AEIC(
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_ major: Builtin.Word,
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_ minor: Builtin.Word,
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_ patch: Builtin.Word
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) -> Builtin.Int1 {
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#if (os(macOS) || os(iOS) || os(tvOS) || os(watchOS) || os(visionOS)) && SWIFT_RUNTIME_OS_VERSIONING
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if Int(major) == 9999 {
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return true._value
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}
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let queryVersion = (Int(major), Int(minor), Int(patch))
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let major32 = Int32(truncatingIfNeeded:Int(queryVersion.0))
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let minor32 = Int32(truncatingIfNeeded:Int(queryVersion.1))
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let patch32 = Int32(truncatingIfNeeded:Int(queryVersion.2))
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// Defer to a builtin that calls clang's version checking builtin from
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// compiler-rt.
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let result32 = Int32(Builtin.targetOSVersionAtLeast(major32._value,
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minor32._value,
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patch32._value))
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return (result32 != (0 as Int32))._value
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#else
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// FIXME: As yet, there is no obvious versioning standard for platforms other
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// than Darwin-based OSes, so we just assume false for now.
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// rdar://problem/18881232
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return false._value
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#endif
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}
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// Performs an availability check in macCatalyst code to support back
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// deployment. This entry point takes in a variant OS version
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// (i.e, an iOS version).
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//
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// This is not inlinable because we
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// don't want to inline the messy implementation details of the
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// compiler-rt support into apps and expose those as ABI surface.
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//
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// This is a magic entry point known to the compiler. It is called in
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// generated code for API availability checking.
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#if (os(macOS) || os(iOS) && targetEnvironment(macCatalyst)) && SWIFT_RUNTIME_OS_VERSIONING
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@_semantics("availability.osversion")
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@_effects(readnone)
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@available(macOS 10.15, iOS 13.0, *)
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#if hasFeature(Macros)
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@_noLocks
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#endif
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public func _stdlib_isVariantOSVersionAtLeast(
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_ major: Builtin.Word,
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_ minor: Builtin.Word,
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_ patch: Builtin.Word
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) -> Builtin.Int1 {
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if Int(major) == 9999 {
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return true._value
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}
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let queryVersion = (Int(major), Int(minor), Int(patch))
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let major32 = Int32(truncatingIfNeeded:Int(queryVersion.0))
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let minor32 = Int32(truncatingIfNeeded:Int(queryVersion.1))
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let patch32 = Int32(truncatingIfNeeded:Int(queryVersion.2))
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// Defer to a builtin that calls clang's version checking builtin from
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// compiler-rt.
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let result32 = Int32(Builtin.targetVariantOSVersionAtLeast(major32._value,
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minor32._value,
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patch32._value))
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return (result32 != (0 as Int32))._value
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}
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#endif
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// Performs an availability check in zippered code to support back
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// deployment. This entry point takes in both a primary OS version
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// (i.e., a macOS version) and a variant OS version (i.e, an iOS version).
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//
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// In a normal macOS process it will return 1 if the running OS version is
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// greater than or equal to major.minor.patchVersion and 0 otherwise. For an
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// macCatalyst process it will return 1 if the running macCatalyst version is greater
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// than or equal to the passed-in variant version.
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//
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// Unlike _stdlib_isOSVersionAtLeast, this is not inlinable because we
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// don't want to inline the messy implementation details of the
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// compiler-rt support into apps and expose those as ABI surface.
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//
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// This is a magic entry point known to the compiler. It is called in
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// generated code for API availability checking.
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#if (os(macOS) || os(iOS) && targetEnvironment(macCatalyst)) && SWIFT_RUNTIME_OS_VERSIONING
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@_semantics("availability.osversion")
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@_effects(readnone)
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@_unavailableInEmbedded
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#if hasFeature(Macros)
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@_noLocks
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#endif
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public func _stdlib_isOSVersionAtLeastOrVariantVersionAtLeast(
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_ major: Builtin.Word,
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_ minor: Builtin.Word,
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_ patch: Builtin.Word,
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_ variantMajor: Builtin.Word,
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_ variantMinor: Builtin.Word,
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_ variantPatch: Builtin.Word
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) -> Builtin.Int1 {
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if Int(major) == 9999 {
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return true._value
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}
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let queryVersion = (Int(major), Int(minor), Int(patch))
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let queryVariantVersion =
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(Int(variantMajor), Int(variantMinor), Int(variantPatch))
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let major32 = UInt32(truncatingIfNeeded:Int(queryVersion.0))
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let minor32 = UInt32(truncatingIfNeeded:Int(queryVersion.1))
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let patch32 = UInt32(truncatingIfNeeded:Int(queryVersion.2))
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let variantMajor32 = UInt32(truncatingIfNeeded:Int(queryVariantVersion.0))
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let variantMinor32 = UInt32(truncatingIfNeeded:Int(queryVariantVersion.1))
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let variantPatch32 = UInt32(truncatingIfNeeded:Int(queryVariantVersion.2))
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// Defer to a builtin that calls clang's version checking builtin from
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// compiler-rt.
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let result32 = Int32(Builtin.targetOSVersionOrVariantOSVersionAtLeast(
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major32._value, minor32._value, patch32._value,
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variantMajor32._value, variantMinor32._value, variantPatch32._value))
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return (result32 != (0 as UInt32))._value
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}
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#endif
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public typealias _SwiftStdlibVersion = SwiftShims._SwiftStdlibVersion
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/// Return true if the main executable was linked with an SDK version
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/// corresponding to the given Swift Stdlib release, or later. Otherwise, return
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/// false.
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///
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/// This is useful to maintain compatibility with older binaries after a
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/// behavioral change in the stdlib.
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///
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/// This function must not be called from inlinable code.
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@inline(__always)
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@_unavailableInEmbedded
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internal func _isExecutableLinkedOnOrAfter(
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_ stdlibVersion: _SwiftStdlibVersion
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) -> Bool {
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#if SWIFT_RUNTIME_OS_VERSIONING
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return _swift_stdlib_isExecutableLinkedOnOrAfter(stdlibVersion)
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#else
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return true
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#endif
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}
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extension _SwiftStdlibVersion {
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@_alwaysEmitIntoClient
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public static var v5_6_0: Self { Self(_value: 0x050600) }
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@_alwaysEmitIntoClient
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public static var v5_7_0: Self { Self(_value: 0x050700) }
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// Note: As of now, there is no bincompat level defined for the versions
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// below. If you need to use one of these in a call to
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// `_isExecutableLinkedOnOrAfter`, then you'll need to define the
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// corresponding version in the runtime.
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@_alwaysEmitIntoClient
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public static var v5_8_0: Self { Self(_value: 0x050800) }
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@_alwaysEmitIntoClient
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public static var v5_9_0: Self { Self(_value: 0x050900) }
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@_alwaysEmitIntoClient
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public static var v5_10_0: Self { Self(_value: 0x050A00) }
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@_alwaysEmitIntoClient
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public static var v6_0_0: Self { Self(_value: 0x060000) }
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@_alwaysEmitIntoClient
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public static var v6_1_0: Self { Self(_value: 0x060100) }
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@_alwaysEmitIntoClient
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public static var v6_2_0: Self { Self(_value: 0x060200) }
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@available(SwiftStdlib 5.7, *)
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public static var current: Self { .v6_2_0 }
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}
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@available(SwiftStdlib 5.7, *)
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@_unavailableInEmbedded
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extension _SwiftStdlibVersion: CustomStringConvertible {
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@available(SwiftStdlib 5.7, *)
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public var description: String {
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let major = _value >> 16
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let minor = (_value >> 8) & 0xFF
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let patch = _value & 0xFF
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return "\(major).\(minor).\(patch)"
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}
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}
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