RFR: JDK-8321017: Record in JFR that IEEE rounding mode was corrupted by loading a library [v2]

[Andrew Haley]

On Fri, 1 Dec 2023 09:05:22 GMT, Matthias Baesken <mbaesken at openjdk.org> wrote:

>> [JDK-8295159](https://bugs.openjdk.org/browse/JDK-8295159) added some IEEE conformance checks and corrections of the floating point environment on Linux and macOS/BSD, and later some UL logging was added too.
>> However the information is not added to the JFR events, and this should be enhanced.
>> The already existing NativeLibraryLoad event can be used for storing the additional information, because the IEEE conformance check and fenv  get/set  is placed in the HS dlopen_helper , where already the NativeLibraryLoad  event objects are created/commited .
>
> Matthias Baesken has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Adjust macOS coding

I'd be careful about worrying users unnecessarily about this. We fully correct this problem if it happens, so an OpenJDK user is not affected. If we fail to fix the FP environment, the most likely reason is that it was broken before the shared library was loaded.

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PR Comment: https://git.openjdk.org/jdk/pull/16903#issuecomment-1835856491