RFR: 8323273: AArch64: Strengthen CompressedClassPointers initialization check for base

[Dean Long]

On Tue, 16 Jan 2024 02:41:40 GMT, Yude Lin <duke at openjdk.org> wrote:

> Summary:
> Add a platform-dependent check for CompressedClassSpaceBaseAddress;
> Remove the "reserve anywhere" attempt after the initial mapping attempt failed---this is rarely used and will likely fail anyway, because the accepted mapping is very restricted on aarch64;
> Additional assertions after initialization.
> 
> Passed hotspot/jtreg/:tier1 on fastdebug

Don't you want to add a constraint function to CompressedClassSpaceBaseAddress in globals.hpp so invalid values are rejected during command-line parsing?

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PR Comment: https://git.openjdk.org/jdk/pull/17437#issuecomment-1935162658