RFR: 8354887: Preserve runtime blobs in AOT code cache [v2]

Wed May 7 15:40:16 UTC 2025

On Wed, 7 May 2025 15:31:35 GMT, Andrew Dinn <adinn at openjdk.org> wrote:

>> @adinn Do you remember why we commented `UseCompatibleCompressedOops` setting?:
>> https://github.com/openjdk/leyden/commit/478f86f9cd6df6b92c037c83d0540b9c5fe97e5c
>> 
>> It is still not enabled - how we are not crashing in premain?
>
> @vnkozlov Ergonomics comes into play. It is set to true in cdsConfig.cpp if CacheDataStore != nullptr.

@adinn in premain it is commented out -
https://github.com/openjdk/leyden/blob/f09d2f7724c628c90df51eacb16b33fee710ed1a/src/hotspot/share/cds/cdsConfig.cpp#L790

#ifdef _LP64
  // FLAG_SET_ERGO_IF_DEFAULT(UseCompatibleCompressedOops, true); // FIXME @iklam - merge with mainline - UseCompatibleCompressedOops
#endif

I don't see any other place it is set.

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PR Comment: https://git.openjdk.org/jdk/pull/25019#issuecomment-2859083913