RFR: 8365932: Implementation of JEP 516: Ahead-of-Time Object Caching with Any GC [v7]

[Erik Österlund]

On Thu, 23 Oct 2025 16:06:11 GMT, Ioi Lam <iklam at openjdk.org> wrote:

> > > Given that we know have support for CDS from all GCs is it time to replace all `INCLUDE_CDS_JAVA_HEAP` with just `INCLUDE_CDS`?
> 
> > 
> 
> > I think we could do that indeed. However, I would like that to be a follow-up cleanup, to avoid cluttering more files in this PR.
> 
> 
> 
> We have 
> 
> 
> 
> ```
> 
> #if INCLUDE_CDS && INCLUDE_G1GC && defined(_LP64)
> 
> #define INCLUDE_CDS_JAVA_HEAP 1
> 
> ```
> 
> 
> 
> So we need to make sure it works for 32 bit as well.

Does 32 bit really need CDS at all? Zero surely doesn't; it's 100x slower. Left we have 32 bit ARM which is seemingly on life support. But yeah either way - not  a decision for this PR.

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PR Comment: https://git.openjdk.org/jdk/pull/27732#issuecomment-3438689367