RFR: 8352437: Support --add-exports with -XX:+AOTClassLinking

[Alan Bateman]

On Thu, 20 Mar 2025 04:46:21 GMT, Ioi Lam <iklam at openjdk.org> wrote:

> `-XX:+AOTClassLinking` requires the CDS archived full module graph (FMG).
> 
> - Before this PR, when  `--add-export` is specified,  FMG is disabled, so AOT caches created with `-XX:+AOTClassLinking` cannot be loaded.
> - After this PR, if the exact same `--add-export` flags as specified across the training/assembly/production phases, the FMG can be used, so we can use so AOT caches created with `-XX:+AOTClassLinking`.
> 
> The change itself is straight-forward: just remember the `--add-export` flags specified during AOT cache creation, and check the exact same ones are used during the production run.
> 
> I did a fair amount of refactoring to change the "exact options specified" checks in modules.cpp, so more such options can be easily added in the future (we need to handle `--add-reads` and `--add-opens` in future RFEs).
> 
> (Note: this PR depends on #24122 )

Is the motivation tests or code that is making use of JDK internals? No objection to the change of course, I'm curious why we are doing this.

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PR Comment: https://git.openjdk.org/jdk/pull/24124#issuecomment-2747329517