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1b1d5ed020
Call `swift_clearSensitive` after destroying or taking "sensitive" struct types. Also, support calling C-functions with "sensitive" parameters or return values. In SIL, sensitive types are address-only and so are sensitive parameters/return values. Though, (small) sensitive C-structs are passed directly to/from C-functions. We need re-abstract such parameter and return values for C-functions.
60 lines
1.7 KiB
Swift
60 lines
1.7 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)
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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)
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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)
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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
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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 = 0xdeadbeaf
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var b = 0xdeadbeaf
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var c = 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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