RFR: 8351230: Collections.synchronizedList returns a list that is not thread-safe

[Luca Kellermann]

On Thu, 1 May 2025 19:05:50 GMT, Stuart Marks <smarks at openjdk.org> wrote:

> Collections.synchronizedList() returns a List implementation that doesn't do proper locking. This PR does the following on the synchronized wrapper:
> 
> - overrides and adds locking to SequencedCollection methods;
> - performs instance management of reversed synchronized views;
> - adds test for race conditions and functional tests of synchronized wrappers.

src/java.base/share/classes/java/util/Collections.java line 2837:

> 2835:                 return reversedView;
> 2836:             }
> 2837:         }

`SynchronizedRandomAccessList` overrides `subList`, should it also override `reversed`?

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PR Review Comment: https://git.openjdk.org/jdk/pull/24990#discussion_r2072672563