mirror of
https://github.com/apple/swift.git
synced 2025-12-14 20:36:38 +01:00
d8abd2fed9
On 32bit platforms there are 7 bits reserved for the unowned retain count. This makes overflow a likely scenario. Implement overflow into the side table. rdar://33495003
36 lines
531 B
Swift
36 lines
531 B
Swift
// RUN: %target-run-simple-swift | %FileCheck %s
|
|
// REQUIRES: executable_test
|
|
|
|
class Owner {
|
|
var children: [Child] = []
|
|
|
|
func addChild(_ c: Child) {
|
|
children.append(c)
|
|
}
|
|
|
|
func removeChildren() {
|
|
children.removeAll()
|
|
}
|
|
|
|
func test() {
|
|
// Overflow of unowned ref count on 32bit.
|
|
for _ in 0 ..< 500 {
|
|
addChild(Child(self))
|
|
}
|
|
removeChildren()
|
|
}
|
|
}
|
|
|
|
class Child {
|
|
unowned var owner: Owner
|
|
|
|
init(_ o: Owner) {
|
|
owner = o
|
|
}
|
|
}
|
|
|
|
let o = Owner()
|
|
o.test()
|
|
print("success")
|
|
// CHECK: success
|