RFR: 8256253: Defer Biased Locking obsoletion to JDK 18

[David Holmes]

On 18/11/2020 10:55 pm, Coleen Phillimore wrote:
> On Wed, 18 Nov 2020 04:42:03 GMT, David Holmes <dholmes at openjdk.org> wrote:
> 
>>> Hi all,
>>>
>>> Please review the following change to defer biased-locking obsoletion to 18, as discussed in [1].
>>> I updated the special_jvm_flags table and re-enabled gtest verify_special_flags.
>>>
>>> Thanks,
>>> Patricio
>>>
>>> [1] https://mail.openjdk.java.net/pipermail/hotspot-dev/2020-November/045454.html
>>
>> src/hotspot/share/runtime/arguments.cpp line 532:
>>
>>> 530:   { "UseOptoBiasInlining",                 JDK_Version::jdk(15), JDK_Version::jdk(18), JDK_Version::jdk(19) },
>>> 531:   { "PrintPreciseBiasedLockingStatistics", JDK_Version::jdk(15), JDK_Version::jdk(18), JDK_Version::jdk(19) },
>>> 532:   { "CriticalJNINatives",                  JDK_Version::jdk(16), JDK_Version::jdk(17), JDK_Version::jdk(18) },
>>
>> To maintain the table ordering this entry needs to move above the BL entries now.
> 
> So these are ordered by the second field?

Yes.

   // -------------- Deprecated Flags --------------
   // --- Non-alias flags - sorted by obsolete_in then expired_in:

David
-----

> -------------
> 
> PR: https://git.openjdk.java.net/jdk/pull/1281
>