Backport: BaseSocketChannel flushNow IONotificationState changes (#2954) #2981
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### Motivation: We could previously hit an assert do to a re-entrancy issue where channel and buffered write state could change during a call-out leading to invalid state. ### Modifications: The decision on whether or not we should be registered for future writes is now taken after the call outs to `fireChannelWritabilityChanged` and `fireChannelReadComplete`. The new registration state is set to `.unregister` if the channel is not open or if there are now flushed pending writes. ### Result: Scope for re-entrancy crashes is reduced. Co-authored-by: Cory Benfield <lukasa@apple.com> (cherry picked from commit fdc3a31)
FranzBusch
approved these changes
Nov 21, 2024
Lukasa
merged commit 7bb2d55
into
apple:sendable-backport-branch
42 of 44 checks passed
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Motivation:
We could previously hit an assert do to a re-entrancy issue where channel and buffered write state could change during a call-out leading to invalid state.
Modifications:
The decision on whether or not we should be registered for future writes is now taken after the call outs to
fireChannelWritabilityChangedandfireChannelReadComplete. The new registration state is set to.unregisterif the channel is not open or if there are now flushed pending writes.Result:
Scope for re-entrancy crashes is reduced.
Co-authored-by: Cory Benfield lukasa@apple.com
(cherry picked from commit fdc3a31)