RFR: 8359707: Add classfile modification code to RedefineClassHelper [v6]

[Coleen Phillimore]

On Fri, 27 Jun 2025 04:21:01 GMT, David Holmes <dholmes at openjdk.org> wrote:

>>> the lambda just copies everything over as-is.
>> ..
>>> But be aware this code does not change the class name use anywhere in the code, descriptors, handles, annotation, etc..., just the class name itself.
>> 
>> @coleenp don't we need to class name to be changed everywhere it appears in the classfile? Or do we know these classes are trivial enough that there is only a single occurrence of the name (and everything else is symbolic via the constant pool) ?
>
> And `replaceAllStrings` is incorrectly named in that case.

I think if we add less trivial classes to be redefined, we might need to upgrade this to the ClassRemapper.  For now this only renames the classfile.  I've renamed the method.

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PR Review Comment: https://git.openjdk.org/jdk/pull/25857#discussion_r2171711787