RFR: 8256253: Defer Biased Locking obsoletion to JDK 18

[David Holmes]

On Wed, 18 Nov 2020 03:26:41 GMT, Patricio Chilano Mateo <pchilanomate 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

Hi Patricio,

One minor issue - see below.

Thanks,
David

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.

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Marked as reviewed by dholmes (Reviewer).

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