RFR: 8354887: Preserve runtime blobs in AOT code cache [v6]

[Vladimir Kozlov]

On Tue, 13 May 2025 18:03:09 GMT, Ashutosh Mehra <asmehra at openjdk.org> wrote:

>> [8350209](https://bugs.openjdk.org/browse/JDK-8350209) introduced the framework for storing code in aot code cache and used it for caching i2c/c2i adapters.
>> This PR extends the `AOTCodeCache` infrastructure and stores various runtime blobs (shared blobs, C1 and C2 runtime blobs) in the AOT code cache. It adds a new diagnostic flag `AOTStubCaching` to enable/disable the caching of these blobs.
>> `AOTCodeFlags.java` test is extended to cover `AOTStubCaching`.
>
> Ashutosh Mehra has updated the pull request with a new target base due to a merge or a rebase. The pull request now contains 18 commits:
> 
>  - Merge branch 'master' into preserve-runtime-blobs-master
>  - Address Vladimir's comments
>    
>    Signed-off-by: Ashutosh Mehra <asmehra at redhat.com>
>  - Update test to make it more resilient
>    
>    Signed-off-by: Ashutosh Mehra <asmehra at redhat.com>
>  - Remove more unused code
>    
>    Signed-off-by: Ashutosh Mehra <asmehra at redhat.com>
>  - Fix whitespace issue. Remove unused code.
>    
>    Signed-off-by: Ashutosh Mehra <asmehra at redhat.com>
>  - Add test for using AOTCodeCache with different CompressedOops
>    configuration
>    
>    Signed-off-by: Ashutosh Mehra <asmehra at redhat.com>
>  - Add check for compressed oops base address; minor refacotring
>    
>    Signed-off-by: Ashutosh Mehra <asmehra at redhat.com>
>  - Merge branch 'master' into preserve-runtime-blobs-master
>  - Address Vladimir's comments
>    
>    Signed-off-by: Ashutosh Mehra <asmehra at redhat.com>
>  - Remove irrelevant comment
>    
>    Signed-off-by: Ashutosh Mehra <asmehra at redhat.com>
>  - ... and 8 more: https://git.openjdk.org/jdk/compare/d1543429...5d7c3aa0

My testing passed.

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Marked as reviewed by kvn (Reviewer).

PR Review: https://git.openjdk.org/jdk/pull/25019#pullrequestreview-2840581163