RFR: 8139457: Array bases are aligned at HeapWord granularity [v12]

[Roman Kennke]

On Thu, 19 Jan 2023 13:56:16 GMT, Stefan Karlsson <stefank at openjdk.org> wrote:

>> Roman Kennke has updated the pull request incrementally with one additional commit since the last revision:
>> 
>>   Several fixes
>
> src/hotspot/share/opto/runtime.cpp line 315:
> 
>> 313:     HeapWord* obj = cast_from_oop<HeapWord*>(result);
>> 314:     if (!is_aligned(hs_bytes, HeapWordSize)) {
>> 315:       *reinterpret_cast<jint*>(reinterpret_cast<char*>(obj + hs_bytes)) = 0;
> 
> This seems be adding a value in bytes to a HeapWord*. Shouldn't it be `reinterpret_cast<char*>(obj) + hs_bytes`?

Duh. Yes, indeed. Fixed in follow-up commit. Thanks!

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

PR: https://git.openjdk.org/jdk/pull/11044