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
62 lines
1.9 KiB
Swift
62 lines
1.9 KiB
Swift
// RUN: %target-run-simple-swift( -parse-as-library -enable-experimental-feature Sensitive -enable-experimental-feature Embedded -wmo -Xfrontend -disable-access-control -runtime-compatibility-version none %target-embedded-posix-shim)
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// RUN: %target-run-simple-swift(-O -parse-as-library -enable-experimental-feature Sensitive -enable-experimental-feature Embedded -wmo -Xfrontend -disable-access-control -runtime-compatibility-version none %target-embedded-posix-shim)
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// RUN: %target-run-simple-swift(-target %module-target-future -parse-as-library -enable-experimental-feature Sensitive -enable-experimental-feature Embedded -wmo -Xfrontend -disable-access-control -runtime-compatibility-version none %target-embedded-posix-shim)
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// REQUIRES: swift_in_compiler
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// REQUIRES: executable_test
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// REQUIRES: optimized_stdlib
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// REQUIRES: OS=macosx || OS=linux-gnu || OS=wasip1
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// REQUIRES: swift_feature_Embedded
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// REQUIRES: swift_feature_Sensitive
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var checkBuffer: UnsafeBufferPointer<UInt32>?
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@inline(never)
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func checkLater<T>(_ t: inout T) {
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withUnsafePointer(to: &t) {
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let size = MemoryLayout<T>.size / MemoryLayout<UInt32>.size
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$0.withMemoryRebound(to: UInt32.self, capacity: size) {
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checkBuffer = UnsafeBufferPointer(start: $0, count: size)
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}
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}
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}
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@inline(never)
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func check() {
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for b in checkBuffer! {
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precondition(b != 0xdeadbeaf)
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}
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}
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@inline(never)
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func testSensitive<T>(_ t: T) {
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do {
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var x: T = t
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checkLater(&x)
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}
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check()
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print(0) // to prevent tail call of `check()`
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}
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@sensitive
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struct SensitiveStruct {
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var a: UInt = 0xdeadbeaf
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var b: UInt = 0xdeadbeaf
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var c: UInt = 0xdeadbeaf
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}
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struct Container<T> {
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var x = 123
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let t: T
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var y = 456
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}
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@main struct Main {
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static func main() {
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testSensitive(SensitiveStruct())
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testSensitive(Optional(SensitiveStruct()))
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testSensitive(Container(t: SensitiveStruct()))
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}
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}
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