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//===----------------------------------------------------------------------===//
//
// This source file is part of the SwiftNIO open source project
//
// Copyright (c) 2020-2021 Apple Inc. and the SwiftNIO project authors
// Licensed under Apache License v2.0
//
// See LICENSE.txt for license information
// See CONTRIBUTORS.txt for the list of SwiftNIO project authors
//
// SPDX-License-Identifier: Apache-2.0
//
//===----------------------------------------------------------------------===//
#if !canImport(Darwin) || os(macOS)
import Dispatch
import NIOCore
import NIOPosix
fileprivate let group = MultiThreadedEventLoopGroup(numberOfThreads: 2)
struct EventLoopCrashTests {
let testMultiThreadedELGCrashesOnZeroThreads = CrashTest(
regex: "Precondition failed: numberOfThreads must be positive"
) {
try? MultiThreadedEventLoopGroup(numberOfThreads: 0).syncShutdownGracefully()
}
let testWaitCrashesWhenOnEL = CrashTest(
regex: #"Precondition failed: BUG DETECTED: wait\(\) must not be called when on an EventLoop"#
) {
let promise = group.next().makePromise(of: Void.self)
try? group.next().submit {
try? promise.futureResult.wait()
}.wait()
}
let testAssertInEventLoop = CrashTest(
regex: "Precondition failed"
) {
group.next().assertInEventLoop(file: "DUMMY", line: 42)
}
let testPreconditionInEventLoop = CrashTest(
regex: "Precondition failed"
) {
group.next().preconditionInEventLoop(file: "DUMMY", line: 42)
}
let testAssertNotInEventLoop = CrashTest(
regex: "Precondition failed"
) {
let el = group.next()
try? el.submit {
el.assertNotInEventLoop(file: "DUMMY", line: 42)
}.wait()
}
let testPreconditionNotInEventLoop = CrashTest(
regex: "Precondition failed"
) {
let el = group.next()
try? el.submit {
el.preconditionNotInEventLoop(file: "DUMMY", line: 42)
}.wait()
}
let testSchedulingEndlesslyInELShutdown = CrashTest(
regex: #"Precondition failed: EventLoop SelectableEventLoop \{ .* \} didn't quiesce after 1000 ticks."#
) {
let group = MultiThreadedEventLoopGroup.init(numberOfThreads: 1)
defer {
try? group.syncShutdownGracefully()
exit(4)
}
let el = group.next()
el.scheduleTask(in: .hours(7)) {
// Will never happen.
exit(1)
}.futureResult.whenFailure { error in
guard case .some(.shutdown) = error as? EventLoopError else {
exit(2)
}
func f() {
el.scheduleTask(in: .nanoseconds(0)) { [f /* to make 5.1 compiler not crash */] in
f()
}.futureResult.whenFailure { [f /* to make 5.1 compiler not crash */] error in
guard case .some(.shutdown) = error as? EventLoopError else {
exit(3)
}
f()
}
}
f()
}
}
let testLeakingAPromiseCrashes = CrashTest(
regex: #"Fatal error: leaking promise created at"#
) {
@inline(never)
func leaker() {
_ = group.next().makePromise(of: Void.self)
}
leaker()
for el in group.makeIterator() {
try! el.submit {}.wait()
}
}
let testUsingTheSingletonGroupWhenDisabled = CrashTest(
regex: #"Fatal error: Cannot create global singleton MultiThreadedEventLoopGroup because the global singletons"#
) {
NIOSingletons.singletonsEnabledSuggestion = false
try? NIOSingletons.posixEventLoopGroup.next().submit {}.wait()
}
let testUsingTheSingletonBlockingPoolWhenDisabled = CrashTest(
regex: #"Fatal error: Cannot create global singleton NIOThreadPool because the global singletons have been"#
) {
let group = MultiThreadedEventLoopGroup(numberOfThreads: 1)
defer {
try? group.syncShutdownGracefully()
}
NIOSingletons.singletonsEnabledSuggestion = false
try? NIOSingletons.posixBlockingThreadPool.runIfActive(eventLoop: group.next(), {}).wait()
}
let testDisablingSingletonsEnabledValueTwice = CrashTest(
regex: #"Fatal error: Bug in user code: Global singleton enabled suggestion has been changed after"#
) {
NIOSingletons.singletonsEnabledSuggestion = false
NIOSingletons.singletonsEnabledSuggestion = false
}
let testEnablingSingletonsEnabledValueTwice = CrashTest(
regex: #"Fatal error: Bug in user code: Global singleton enabled suggestion has been changed after"#
) {
NIOSingletons.singletonsEnabledSuggestion = true
NIOSingletons.singletonsEnabledSuggestion = true
}
let testEnablingThenDisablingSingletonsEnabledValue = CrashTest(
regex: #"Fatal error: Bug in user code: Global singleton enabled suggestion has been changed after"#
) {
NIOSingletons.singletonsEnabledSuggestion = true
NIOSingletons.singletonsEnabledSuggestion = false
}
let testSettingTheSingletonEnabledValueAfterUse = CrashTest(
regex: #"Fatal error: Bug in user code: Global singleton enabled suggestion has been changed after"#
) {
try? MultiThreadedEventLoopGroup.singleton.next().submit({}).wait()
NIOSingletons.singletonsEnabledSuggestion = true
}
let testSettingTheSuggestedSingletonGroupCountTwice = CrashTest(
regex: #"Fatal error: Bug in user code: Global singleton suggested loop/thread count has been changed after"#
) {
NIOSingletons.groupLoopCountSuggestion = 17
NIOSingletons.groupLoopCountSuggestion = 17
}
let testSettingTheSuggestedSingletonGroupChangeAfterUse = CrashTest(
regex: #"Fatal error: Bug in user code: Global singleton suggested loop/thread count has been changed after"#
) {
try? MultiThreadedEventLoopGroup.singleton.next().submit({}).wait()
NIOSingletons.groupLoopCountSuggestion = 17
}
let testSettingTheSuggestedSingletonGroupLoopCountToZero = CrashTest(
regex: #"Precondition failed: illegal value: needs to be strictly positive"#
) {
NIOSingletons.groupLoopCountSuggestion = 0
}
let testSettingTheSuggestedSingletonGroupLoopCountToANegativeValue = CrashTest(
regex: #"Precondition failed: illegal value: needs to be strictly positive"#
) {
NIOSingletons.groupLoopCountSuggestion = -1
}
#if compiler(>=5.9) && swift(<5.11) // We only support Concurrency executor take-over on 5.9-5.10, as versions greater than 5.10 have not been properly tested.
let testInstallingSingletonMTELGAsConcurrencyExecutorWorksButOnlyOnce = CrashTest(
regex: #"Fatal error: Must be called only once"#
) {
guard NIOSingletons.unsafeTryInstallSingletonPosixEventLoopGroupAsConcurrencyGlobalExecutor() else {
print("Installation failed, that's unexpected -> let's not crash")
return
}
// Yes, this pattern is bad abuse but this is a crash test, we don't mind.
let semaphoreAbuse = DispatchSemaphore(value: 0)
if #available(macOS 14.0, iOS 17.0, watchOS 10.0, tvOS 17.0, *) {
Task {
precondition(MultiThreadedEventLoopGroup.currentEventLoop != nil)
try await Task.sleep(nanoseconds: 123)
precondition(MultiThreadedEventLoopGroup.currentEventLoop != nil)
semaphoreAbuse.signal()
}
} else {
semaphoreAbuse.signal()
}
semaphoreAbuse.wait()
print("Okay, worked")
// This should crash
_ = NIOSingletons.unsafeTryInstallSingletonPosixEventLoopGroupAsConcurrencyGlobalExecutor()
}
#endif // compiler(>=5.9) && swift(<5.11)
}
#endif // !canImport(Darwin) || os(macOS)
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