RFR: 8359936: StableValues can release the underlying function after complete computation [v4]

[Viktor Klang]

On Mon, 11 Aug 2025 18:08:40 GMT, ExE Boss <duke at openjdk.org> wrote:

>> src/java.base/share/classes/jdk/internal/lang/stable/StableValueImpl.java line 174:
>> 
>>> 172:                     // Reduce the counter and if it reaches zero, clear the reference
>>> 173:                     // to the underlying holder.
>>> 174:                     underlyingHolder.countDown();
>> 
>> Doesn't the code here imply that if the underlying supplier/function etc throws an exception, the underlyingHolder won't get counted down, and will leak?
>
> No, because the stable value doesn’t get set in that case, so the supplier/function will be called again.

@ExE-Boss That seems to presume that 1) it will be called again, and 2) it will eventually produce a non-exception

-------------

PR Review Comment: https://git.openjdk.org/jdk/pull/25878#discussion_r2269207579