25 lines
828 B
Swift
25 lines
828 B
Swift
import Darwin
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import Foundation
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import Testing
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@Suite(.serialized)
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struct CoverageDumpTests {
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@Test func periodicallyFlushCoverage() async {
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guard ProcessInfo.processInfo.environment["LLVM_PROFILE_FILE"] != nil else { return }
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guard let writeProfile = resolveProfileWriteFile() else { return }
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let deadline = Date().addingTimeInterval(4)
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while Date() < deadline {
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_ = writeProfile()
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try? await Task.sleep(nanoseconds: 250_000_000)
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}
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}
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}
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private typealias ProfileWriteFn = @convention(c) () -> Int32
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private func resolveProfileWriteFile() -> ProfileWriteFn? {
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let symbol = dlsym(UnsafeMutableRawPointer(bitPattern: -2), "__llvm_profile_write_file")
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guard let symbol else { return nil }
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return unsafeBitCast(symbol, to: ProfileWriteFn.self)
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}
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