Integrated: 8347830: [premain] UseCompatibleCompressedOops is broken after merging with mainline

[Vladimir Kozlov]

On Fri, 16 May 2025 02:33:45 GMT, Vladimir Kozlov <kvn at openjdk.org> wrote:

> The issue was that we did not allocate space "noaccess prefix" before heap for read-only page when we setup type of encoding  with `UseCompatibleCompressedOops` flag. I update code which reserves heap for compressed oops to take into account this flag.
> 
> An other issue was that `UseCompatibleCompressedOops` flag was set during CDS arguments consistency checkup. But `UseCompressedOops` flag is set by GC ergonomics. I moved code to CDS ergonomics setting method.
> 
> During testing I hit assert that AOT code address table is missing some code blob address. But it was actually card table base address which pointed inside CodeCache. I added special case to check for it early.
> 
> Tested premain-tier1.

This pull request has now been integrated.

Changeset: fc222b7a
Author:    Vladimir Kozlov <kvn at openjdk.org>
URL:       https://git.openjdk.org/leyden/commit/fc222b7a841f4f828fad867dc13a02817b82899e
Stats:     63 lines in 3 files changed: 39 ins; 16 del; 8 mod

8347830: [premain] UseCompatibleCompressedOops is broken after merging with mainline

Reviewed-by: asmehra, adinn

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PR: https://git.openjdk.org/leyden/pull/67