RFR: 8377895: Create sizeof_auto, to reduce narrowing conversions [v2]

[Leo Korinth]

On Tue, 17 Feb 2026 13:05:53 GMT, Kim Barrett <kbarrett at openjdk.org> wrote:

>> Leo Korinth has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   Fix test for platforms that can not handle unsigned max sizes
>
> src/hotspot/share/utilities/globalDefinitions.hpp line 171:
> 
>> 169: #endif  // _LP64
>> 170: 
>> 171: // Use this instead of sizeof() if you want your expression not to be of type size_t
> 
> Needs a better description, about what it actually does.

How about: returns the size (in bytes) of T in an unsigned type that is as small as possible.

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PR Review Comment: https://git.openjdk.org/jdk/pull/29716#discussion_r2817454126