RFR: 8244661: JFR: Remove use of thread-locals for java.base events

[Jaroslav Bachorík]

Hi Erik,

A bit naive question - would it be possible to validate the correct
order of `handler.write()` arguments such that they correspond to the
event fields during testing somehow (in addition to having the warning
comments in sources)?

Thanks!

-JB-

On Sat, May 9, 2020 at 11:45 PM Erik Gahlin <erik.gahlin at oracle.com> wrote:
>
> Hi,
>
> Could I have a review of change that removes object caching for performance sensitive events in java.base. Instead events are written directly using the event handler. Purpose is to avoid memory bloat when using thread-locals together with virtual threads for project Loom, but it will benefit ordinary threads as well, so plan is to check it in for JDK 15.
>
> Bug:
> https://bugs.openjdk.java.net/browse/JDK-8244661
>
> Webrev:
> http://cr.openjdk.java.net/~egahlin/8244661/
>
> Testing: jdk/jdk/jfr + reproducer in the original allocation bug
> https://bugs.openjdk.java.net/browse/JDK-8187234
>
> Thanks
> Erik
>