RFR: 8331360: RISCV: u32 _partial_subtype_ctr loaded/stored as 64

[Robbin Ehn]

On Tue, 30 Apr 2024 08:18:50 GMT, Robbin Ehn <rehn at openjdk.org> wrote:

>> src/hotspot/cpu/riscv/macroAssembler_riscv.cpp line 3347:
>> 
>>> 3345: 
>>> 3346: #ifndef PRODUCT
>>> 3347:   incrementw(ExternalAddress((address)&SharedRuntime::_partial_subtype_ctr));
>> 
>> I just checked the x86 and aarch64 counterpart. Seems that aarch64 bears the same issue [1] as it uses `ldr` / `str` which load / store 64-bit data items like here.
>> 
>> [1] https://github.com/openjdk/jdk/blob/master/src/hotspot/cpu/aarch64/macroAssembler_aarch64.cpp#L1565
>
> I'll open a separate PR, and maybe fix it.

FYI: https://github.com/openjdk/jdk/pull/19011

-------------

PR Review Comment: https://git.openjdk.org/jdk/pull/19010#discussion_r1584386296