RFR: 8244224: Implementation of JEP 381: Remove the Solaris and SPARC Ports (hotspot)

[Mikael Vidstedt]

> On May 8, 2020, at 12:48 PM, Daniel D. Daugherty <daniel.daugherty at oracle.com> wrote:
> 
> On 5/7/20 1:35 AM, Mikael Vidstedt wrote:
>> New webrev here:
>> 
>> webrev: http://cr.openjdk.java.net/~mikael/webrevs/8244224/webrev.01/hotspot/open/webrev/
> 
> This pretty much says it all:
> 
> > Summary of changes:    90904 lines changed: 8 ins; 90725 del; 171 mod; 103780 unchg
> 
> 
> My review is focused on looking at the changes and not looking for missed
> changes. I figure there's enough work here just looking at the changes to
> keep me occupied for a while and enough people have posted comments about
> finding other things to be examined, etc...
> 
> Unlike my normal reviews, I won't be listing all the touched files;
> (there's _only_ 427 of them...)
> 
> Don't forget to make a copyright year update pass before you push.

Yup - I have added it in 10 different places on my TODO list to maximize the likelihood of me remembering it :)

> 
> src/hotspot/os/posix/os_posix.hpp
>         L174
>     old L175 #ifndef SOLARIS
>         L176
>        nit - on most of this style of deletion you also got rid of
>        one of the blank lines, but not here.

Oops, will fix.

> src/hotspot/share/utilities/dtrace.hpp
>     old L42: #elif defined(__APPLE__)
>     old L44: #include <sys/types.h>
>     old L45: #else
>     new L32: #include <sys/types.h>
>         <sys/types.h> was previous included only for __APPLE__ and it
>         is now there for every platform. Any particular reason?

No particular reason other than "it looks cleaner". I guess we could see if the include can be removed altogether.

> Thumbs up!

Thanks for the review!!

Cheers,
Mikael

> 
>> incremental: http://cr.openjdk.java.net/~mikael/webrevs/8244224/webrev.01/hotspot.incr/open/webrev/
>> 
>> Remaining items:
>> 
>> * File follow-up to remove STACK_BIAS
>> 
>> * File follow-ups to change/update/remove flags and/or flag documentation: UseLWPSynchronization, BranchOnRegister, LIRFillDelaySlots, ArrayAllocatorMallocLimit, ThreadPriorityPolicy
>> 
>> * File follow-up(s) to update comments ("solaris", “sparc”, “solstudio”, “sunos”, “sun studio”, “s compiler bug”, “niagara”, …)
>> 
>> 
>> Please let me know if there’s something I have missed!
>> 
>> Cheers,
>> Mikael
>> 
>>> On May 3, 2020, at 10:12 PM, Mikael Vidstedt <mikael.vidstedt at oracle.com> wrote:
>>> 
>>> 
>>> Please review this change which implements part of JEP 381:
>>> 
>>> JBS: https://bugs.openjdk.java.net/browse/JDK-8244224
>>> webrev: http://cr.openjdk.java.net/~mikael/webrevs/8244224/webrev.00/hotspot/open/webrev/
>>> JEP: https://bugs.openjdk.java.net/browse/JDK-8241787
>>> 
>>> 
>>> Note: When reviewing this, please be aware that this exercise was *extremely* mind-numbing, so I appreciate your help reviewing all the individual changes carefully. You may want to get that coffee cup filled up (or whatever keeps you awake)!
>>> 
>>> 
>>> Background:
>>> 
>>> Because of the size of the total patch and wide range of areas touched, this patch is one out of in total six partial patches which together make up the necessary changes to remove the Solaris and SPARC ports. The other patches are being sent out for review to mailing lists appropriate for the respective areas the touch. An email will be sent to jdk-dev summarizing all the patches/reviews. To be clear: this patch is *not* in itself complete and stand-alone - all of the (six) patches are needed to form a complete patch. Some changes in this patch may look wrong or incomplete unless also looking at the corresponding changes in other areas.
>>> 
>>> For convenience, I’m including a link below[1] to the full webrev, but in case you have comments on changes in other areas, outside of the files included in this thread, please provide those comments directly in the thread on the appropriate mailing list for that area if possible.
>>> 
>>> In case it helps, the changes were effectively produced by searching for and updating any code mentioning “solaris", “sparc”, “solstudio”, “sunos”, etc. More information about the areas impacted can be found in the JEP itself.
>>> 
>>> A big thank you to Igor Ignatyev for helping make the changes to the hotspot tests!
>>> 
>>> Also, I have a short list of follow-ups which I’m going to look at separately from this JEP/patch, mainly related to command line options/flags which are no longer relevant and should be deprecated/obsoleted/removed.
>>> 
>>> Testing:
>>> 
>>> A slightly earlier version of this change successfully passed tier1-8, as well as client tier1-2. Additional testing will be done after the first round of reviews has been completed.
>>> 
>>> Cheers,
>>> Mikael
>>> 
>>> [1] http://cr.openjdk.java.net/~mikael/webrevs/8244224/webrev.00/all/open/webrev/
>>> 
>