Integrated: Store AOT code in cached code region of AOT cache

[Ashutosh Mehra]

On Tue, 11 Feb 2025 22:15:24 GMT, Ashutosh Mehra <asmehra at openjdk.org> wrote:

> This PR stores AOT code in the cached code region of AOT Cache.
> 
> Some things worth pointing out:
> 1. Before this patch: the AOT code is first generated in a temporary buffer. After all the code is generated, this temporary buffer is copied into second buffer (allocated in native heap) for multiple reasons. This second buffer is then stored in the file as is. With this patch the second buffer is now allocated in the cached code region which is part of the AOT cache. So now the cached code region contains the permanent oops table (which already exists before this patch) and the AOT code+data.
> 2. I have removed `_jvm_version_offset` from the SCCHeader. AOT Cache already stores VM identifier which should cover it.
> ~3. I have to remove the code that maps cached code region to CodeCache because the contents in cached code region are not CodeBlobs. The cached code region can be mapped to any random address.~
> 4. I have replaced references to "Startup Code Cache" with "AOT Code Cache" or "AOT Code".

This pull request has now been integrated.

Changeset: bdbeaf25
Author:    Ashutosh Mehra <asmehra at openjdk.org>
URL:       https://git.openjdk.org/leyden/commit/bdbeaf2588fb9b02d98c1426c160236ea8ef763e
Stats:     357 lines in 13 files changed: 47 ins; 194 del; 116 mod

Store AOT code in cached code region of AOT cache

Reviewed-by: kvn, iklam

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PR: https://git.openjdk.org/leyden/pull/39