RFR: 8366272: The os::xxx APIs do not manage errno correctly [v6]

[Anton Artemov]

On Mon, 8 Dec 2025 16:17:41 GMT, Anton Artemov <aartemov at openjdk.org> wrote:

>> Hi, please consider the following changes:
>> 
>> In this PR the handling of `errno` is improved by inspection of the codebase and fixing potential overwrites of `errno` by other methods. Potential overwrites are addressed using `ErrnoPreserver` functionality where necessary. 
>> 
>> Tested in tiers 1 - 5.
>
> Anton Artemov has updated the pull request with a new target base due to a merge or a rebase. The incremental webrev excludes the unrelated changes brought in by the merge/rebase. The pull request contains six additional commits since the last revision:
> 
>  - Merge remote-tracking branch 'origin/master' into JDK-8366272-the-os-xxx-api-do-not-manage-errno-correctly
>  - 8366272: Fixed whitespaces.
>  - 8366272: Addressed reviewer's comments.
>  - 8366272: Addressed reviewer's comments.
>  - Merge remote-tracking branch 'origin/master' into JDK-8366272-the-os-xxx-api-do-not-manage-errno-correctly
>  - 8366272: Improved errno management in os:xxx methods

Thanks for reviews, let's

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PR Comment: https://git.openjdk.org/jdk/pull/28086#issuecomment-3631413025