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c0674b7ef8
The lit feature `objc_interop` is used as a proxy for the availability of libdispatch and Foundation. Although we don't support Obj-C on non-Apple platforms, we support libdispatch and Foundation. Let's break up `objc_interop` into finer-grained categories so we can run more tests on non-Apple platforms. This patch adds lit features `libdispatch` and `foundation` (currently only enabled on Apple platforms) and removes the `objc_interop` dependency from libdispatch tests.
104 lines
2.2 KiB
Swift
104 lines
2.2 KiB
Swift
// RUN: %target-run-simple-swift
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// REQUIRES: executable_test
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// REQUIRES: stress_test
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// REQUIRES: libdispatch
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import StdlibUnittest
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import Dispatch
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let iterations = 200_000
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class Thing {}
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class WBox<T: AnyObject> {
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weak var wref: T?
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init(_ ref: T) { self.wref = ref }
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init() { self.wref = nil }
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}
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let WeakReferenceRaceTests = TestSuite("WeakReferenceRaceTests")
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func forwardOptional<T>(_ t: T!) -> T {
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return t!
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}
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WeakReferenceRaceTests.test("class instance property [SR-192] (copy)") {
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let q = DispatchQueue(label: "", attributes: .concurrent)
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// Capture a weak reference via its container object
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// "https://bugs.swift.org/browse/SR-192"
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for i in 1...iterations {
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let box = WBox(Thing())
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let closure = {
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let nbox = WBox<Thing>()
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nbox.wref = box.wref
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_blackHole(nbox)
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}
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q.async(execute: closure)
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q.async(execute: closure)
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}
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q.async(flags: .barrier) {}
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}
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WeakReferenceRaceTests.test("class instance property [SR-192] (load)") {
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let q = DispatchQueue(label: "", attributes: .concurrent)
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// Capture a weak reference via its container object
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// "https://bugs.swift.org/browse/SR-192"
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for i in 1...iterations {
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let box = WBox(Thing())
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let closure = {
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if let ref = box.wref {
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_blackHole(ref)
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}
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}
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q.async(execute: closure)
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q.async(execute: closure)
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}
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q.async(flags: .barrier) {}
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}
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WeakReferenceRaceTests.test("direct capture (copy)") {
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let q = DispatchQueue(label: "", attributes: .concurrent)
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// Capture a weak reference directly in multiple closures
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for i in 1...iterations {
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weak var wref = Thing()
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let closure = {
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let nbox = WBox<Thing>()
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nbox.wref = wref
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_blackHole(nbox)
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}
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q.async(execute: closure)
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q.async(execute: closure)
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}
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q.async(flags: .barrier) {}
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}
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WeakReferenceRaceTests.test("direct capture (load)") {
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let q = DispatchQueue(label: "", attributes: .concurrent)
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// Capture a weak reference directly in multiple closures
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for i in 1...iterations {
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weak var wref = Thing()
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let closure = {
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if let ref = wref {
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_blackHole(ref)
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}
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}
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q.async(execute: closure)
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q.async(execute: closure)
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}
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q.async(flags: .barrier) {}
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}
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runAllTests()
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