1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
|
// RUN: %empty-directory(%t)
// RUN: %target-build-swift -enable-experimental-feature IsolatedDeinit -plugin-path %swift-plugin-dir -target %target-future-triple -parse-stdlib %import-libdispatch %s -o %t/a.out
// RUN: %target-codesign %t/a.out
// RUN: %env-SWIFT_IS_CURRENT_EXECUTOR_LEGACY_MODE_OVERRIDE=swift6 %target-run %t/a.out
// REQUIRES: libdispatch
// REQUIRES: executable_test
// REQUIRES: concurrency
// REQUIRES: concurrency_runtime
// UNSUPPORTED: back_deployment_runtime
// REQUIRES: swift_feature_IsolatedDeinit
import Swift
import _Concurrency
import Dispatch
import StdlibUnittest
@_silgen_name("swift_task_isCurrentExecutor")
private func isCurrentExecutor(_ executor: Builtin.Executor) -> Bool
private func isCurrentExecutor(_ executor: UnownedSerialExecutor) -> Bool {
isCurrentExecutor(unsafeBitCast(executor, to: Builtin.Executor.self))
}
extension DispatchGroup {
func enter(_ count: Int) {
for _ in 0..<count {
self.enter()
}
}
}
@available(SwiftStdlib 5.1, *)
struct TL {
@TaskLocal
static var number: Int = 0
}
func checkTaskLocalStack() {
TL.$number.withValue(-999) {
expectEqual(-999, TL.number)
}
}
actor ActorNoOp {
let expectedNumber: Int
let group: DispatchGroup
let probe: Probe
init(expectedNumber: Int, group: DispatchGroup) {
self.expectedNumber = expectedNumber
self.group = group
self.probe = Probe(expectedNumber: expectedNumber, group: group)
self.probe.probeExpectedExecutor = self.unownedExecutor
}
isolated deinit {
expectTrue(isCurrentExecutor(self.unownedExecutor))
expectEqual(expectedNumber, TL.number)
checkTaskLocalStack()
group.leave()
}
}
actor ProxyActor: Actor {
private let impl: ActorNoOp
init(expectedNumber: Int, group: DispatchGroup) {
self.impl = ActorNoOp(expectedNumber: expectedNumber, group: group)
}
isolated deinit {}
nonisolated var unownedExecutor: UnownedSerialExecutor {
return impl.unownedExecutor
}
}
@globalActor actor AnotherActor: GlobalActor {
static let shared = AnotherActor()
func performTesting(_ work: @Sendable () -> Void) {
work()
}
}
class Probe {
var probeExpectedExecutor: UnownedSerialExecutor
let probeExpectedNumber: Int
let probeGroup: DispatchGroup
init(expectedNumber: Int, group: DispatchGroup) {
self.probeExpectedExecutor = AnotherActor.shared.unownedExecutor
self.probeExpectedNumber = expectedNumber
self.probeGroup = group
group.enter()
}
deinit {
expectTrue(isCurrentExecutor(probeExpectedExecutor))
expectEqual(probeExpectedNumber, TL.number)
checkTaskLocalStack()
probeGroup.leave()
}
}
class ClassNoOp: Probe {
let expectedNumber: Int
let group: DispatchGroup
let probe: Probe
override init(expectedNumber: Int, group: DispatchGroup) {
self.expectedNumber = expectedNumber
self.group = group
self.probe = Probe(expectedNumber: expectedNumber, group: group)
super.init(expectedNumber: expectedNumber, group: group)
}
@AnotherActor
deinit {
expectTrue(isCurrentExecutor(AnotherActor.shared.unownedExecutor))
expectEqual(expectedNumber, TL.number)
checkTaskLocalStack()
group.leave()
}
}
let tests = TestSuite("Isolated Deinit")
if #available(SwiftStdlib 5.1, *) {
tests.test("class sync fast path") {
let group = DispatchGroup()
group.enter(1)
Task {
// FIXME: isolated deinit should be clearing task locals
await TL.$number.withValue(42) {
await AnotherActor.shared.performTesting {
_ = ClassNoOp(expectedNumber: 0, group: group)
}
}
}
group.wait()
}
tests.test("class sync slow path") {
let group = DispatchGroup()
group.enter(1)
Task {
TL.$number.withValue(99) {
_ = ClassNoOp(expectedNumber: 0, group: group)
}
}
group.wait()
}
tests.test("actor sync fast path") {
let group = DispatchGroup()
group.enter(1)
Task {
// FIXME: isolated deinit should be clearing task locals
TL.$number.withValue(99) {
// Despite last release happening not on the actor itself,
// this is still a fast path due to optimisation for deallocating actors.
_ = ActorNoOp(expectedNumber: 0, group: group)
}
}
group.wait()
}
tests.test("actor sync slow path") {
let group = DispatchGroup()
group.enter(1)
Task {
TL.$number.withValue(99) {
// Using ProxyActor breaks optimization
_ = ProxyActor(expectedNumber: 0, group: group)
}
}
group.wait()
}
tests.test("no TLs") {
let group = DispatchGroup()
group.enter(2)
Task {
_ = ActorNoOp(expectedNumber: 0, group: group)
_ = ClassNoOp(expectedNumber: 0, group: group)
}
group.wait()
}
}
runAllTests()
|
