mirror of
https://github.com/apple/swift.git
synced 2026-06-20 15:42:51 +02:00
Doug Gregor
ae1e3d0865
The new library, swiftEmbeddedPlatformPOSIX, implements all of the _swift_XYZ functions needed to support Embedded Swift as shims on top of a POSIX system that provides posix_memalign, free, putchar, and so on. This offers an easier way to bridge between the prior ad hoc requirements of Embedded Swift and the newer platform abstraction layer. Part of rdar://164057124
124 lines
3.7 KiB
Swift
124 lines
3.7 KiB
Swift
// RUN: %empty-directory(%t)
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// RUN: %target-swift-frontend %s -parse-as-library -enable-experimental-feature Embedded -c -o %t/main.o
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// RUN: %target-clang %target-clang-resource-dir-opt %t/main.o %target-embedded-posix-shim -o %t/a.out -dead_strip -Xlinker %swift_obj_root/lib/swift/embedded/%module-target-triple/libswiftUnicodeDataTables.a
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// RUN: %target-run %t/a.out | %FileCheck %s
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// REQUIRES: swift_in_compiler
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// REQUIRES: executable_test
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// REQUIRES: OS=macosx || OS=wasip1
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// REQUIRES: optimized_stdlib
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// REQUIRES: swift_feature_Embedded
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enum ExpectedDeconstruction {
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case scratchIfAvailable
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case interiorPointer
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case extraAllocation
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}
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func expectDeconstruct(
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_ str: String,
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_ expectDeconstruct: ExpectedDeconstruction,
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showFrame: Bool = true,
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file: String = #file, line: UInt = #line
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) {
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let expectBytes = Array(str.utf8)
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_ = Array<UInt8>(unsafeUninitializedCapacity: 16) {
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buffer, initializedCount in
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// Deconstruct with a provided scratch space
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// WS == with scratch, N == nil
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let scratch = UnsafeMutableRawBufferPointer(buffer)
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let (ownerWS, ptrWS, lengthWS, usedScratchWS, allocatedMemoryWS)
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: (_ConvertedObject?, UnsafePointer<UInt8>, Int, Bool, Bool)
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= str._deconstructUTF8(scratch: scratch)
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let (ownerN, ptrN, lengthN, usedScratchN, allocatedMemoryN)
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: (_ConvertedObject?, UnsafePointer<UInt8>, Int, Bool, Bool)
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= str._deconstructUTF8(scratch: nil)
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let rawBytesWS = UnsafeRawBufferPointer(start: ptrWS, count: lengthWS)
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let rawBytesN = UnsafeRawBufferPointer(start: ptrN, count: lengthN)
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precondition(expectBytes.elementsEqual(rawBytesWS))
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precondition(rawBytesWS.elementsEqual(rawBytesN))
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switch expectDeconstruct {
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case .scratchIfAvailable:
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precondition(ownerWS == nil)
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precondition(ownerN != nil)
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precondition(UnsafeRawPointer(scratch.baseAddress) == rawBytesWS.baseAddress)
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precondition(UnsafeRawPointer(scratch.baseAddress) != rawBytesN.baseAddress)
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precondition(lengthWS < scratch.count)
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precondition(lengthN < scratch.count)
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precondition(usedScratchWS)
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precondition(!usedScratchN)
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precondition(!allocatedMemoryWS)
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precondition(allocatedMemoryN)
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case .interiorPointer:
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// TODO: owner == (immortal ? nil : StringObject.largeAddress)
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precondition(str.isContiguousUTF8)
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var copy = str
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copy.withUTF8 {
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precondition($0.baseAddress == ptrWS)
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precondition($0.baseAddress == ptrN)
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precondition($0.count == lengthWS)
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precondition($0.count == lengthN)
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}
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precondition(!usedScratchWS)
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precondition(!usedScratchN)
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precondition(!allocatedMemoryWS)
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precondition(!allocatedMemoryN)
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case .extraAllocation:
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precondition(!str.isContiguousUTF8)
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precondition(ownerWS != nil)
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precondition(ownerN != nil)
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precondition(!usedScratchWS)
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precondition(!usedScratchN)
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precondition(allocatedMemoryWS)
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precondition(allocatedMemoryN)
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}
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}
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}
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@inline(never)
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func id<T>(_ a: T) -> T { a }
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func testDeconstruct() {
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let smallASCII = "abcd"
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#if _pointerBitWidth(_32) && os(watchOS)
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let smallUTF8 = "ジッパ"
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#elseif _pointerBitWidth(_32)
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let smallUTF8 = "ジッ"
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#else
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let smallUTF8 = "ジッパー"
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#endif
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let large = "the quick fox jumped over the lazy brown dog"
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var largeMortal = large
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largeMortal.append(id("🧟♀️"))
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largeMortal.append(id(largeMortal.last!))
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expectDeconstruct(smallASCII, .scratchIfAvailable)
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expectDeconstruct(smallUTF8, .scratchIfAvailable)
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expectDeconstruct(large, .interiorPointer)
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expectDeconstruct(largeMortal, .interiorPointer)
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}
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@main
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struct Main {
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static func main() {
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testDeconstruct()
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// CHECK: Success!
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print("Success!")
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}
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}
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