RFR: 8243996: Remove hardcoded field offsets from HotSpot

[Erik Österlund]

Hi John,

> On 14 May 2020, at 21:12, John Rose <john.r.rose at oracle.com> wrote:
> 
> 
>> On May 14, 2020, at 2:30 AM, Erik Österlund <erik.osterlund at oracle.com> wrote:
> 
>> ...
>> I could send
>> a new RFR trying to normalize the style of the various offsets in JavaClasses to use a leading '_', be private
>> and have an accessor function that asserts offset sanity. What do you think?
> 
> That is a fine idea; thanks for suggesting it.

Great. Will file.

> 
>> Not sure how I got here implementing support for compressed class pointers in the absence of compressed
>> oops. Oh dear…
> 
> Indeed.  That’s how it goes with this code base.
> 
> Sometimes it’s as if you pick at a little thread on your sleeve, and
> then it animates and starts to wrap itself around your finger.
> Suddenly you realize your sleeve is full of swaying fibers…  :-)

Yup! :)

> — John
> 
> P.S. To deal with Emacs macro seizures, I have this in my Preferences.el:
> 
> (push '("/vmSymbols\\.hpp\\'" . fundamental-mode) auto-mode-alist)
> (push '("/globals\\.hpp\\'" . fundamental-mode) auto-mode-alist)
> (push '("/vmStructs\\.cpp\\'" . fundamental-mode) auto-mode-alist)

Ah cool trick. Will try that one...

Thanks,
/Erik