[lworld] RFR: 8366093: [lworld] Add preview mode to C++ classloader [v2]

[David Beaumont]

On Tue, 21 Oct 2025 18:21:40 GMT, Roger Riggs <rriggs at openjdk.org> wrote:

>> David Beaumont has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   Reorganising to catch preview-only cases
>
> src/hotspot/share/classfile/classLoader.cpp line 1522:
> 
>> 1520:   if (jimage_exists()) {
>> 1521:     jimage_init(enable_preview);
>> 1522:   }
> 
> This silently ignores enable_preview if there there is no open image. 
> Is it only the exploded build that will not have an open image?
> Should there be an assert on the false branch of  `jimage_exists`?

Interesting question. I'll have a think.

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PR Review Comment: https://git.openjdk.org/valhalla/pull/1618#discussion_r2455229688