RFR: JDK-8317919: pthread_attr_init handle return value and destroy pthread_attr_t object [v2]

[David Holmes]

On Thu, 12 Oct 2023 14:31:19 GMT, Matthias Baesken <mbaesken at openjdk.org> wrote:

>> Seems we miss on AIX and Linux the handling of pthread_attr_init return value and sometimes in special cases destroying the related pthread_attr_t object.
>
> Matthias Baesken has updated the pull request incrementally with one additional commit since the last revision:
> 
>   add pthread_attr_destroy to SplashCreateThread

Also note that this issue has been raised in the past, regarding the return value of `pthread_attr_init` but there was no need to make any change on Linux. From the manpage:

POSIX.1-2001 documents an ENOMEM error for pthread_attr_init(); on Linux these functions always succeed (but por‐
       table and future-proof applications should nevertheless handle a possible error return).

It is very unlikely that this would ever change so we have not made such a change in the past.

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PR Comment: https://git.openjdk.org/jdk/pull/16147#issuecomment-1763632145