RFR: 8369296: Add fast class init checks in interpreter for resolving ConstantPool entries for static field [v2]

[Vladimir Ivanov]

On Tue, 7 Oct 2025 14:49:24 GMT, Ashutosh Mehra <asmehra at openjdk.org> wrote:

>> This patch adds fast clinit barrier in the interpreter when resolving cp entry for a static field.
>> 
>> Testing: tested x86-64 by running `hotspot_runtime` group
>> Specifically, `runtime/clinit/ClassInitBarrier.java` fails if the block for adding `clinit_barrier` is commented out in `TemplateTable::resolve_cache_and_index_for_field`
>
> Ashutosh Mehra has updated the pull request incrementally with one additional commit since the last revision:
> 
>   Fix compile failure
>   
>   Signed-off-by: Ashutosh Mehra <asmehra at redhat.com>

x86- and aarch64-specific changes look good.

There are 3 other platforms  (ppc, s390, and riscv) which report `VM_Version::supports_fast_class_init_checks() == true`. All of them require similar changes in platform-specific code.

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PR Comment: https://git.openjdk.org/jdk/pull/27676#issuecomment-3377767332