[8u] RFR 8250928: JFR: Improve hash algorithm for stack traces

[Aleksey Shipilev]

On 9/1/20 11:56 AM, Aleksey Shipilev wrote:
> On 8/31/20 7:11 PM, Jaroslav Bachorík wrote:
>> Please, review this backport of a hash-collision reducing fix in JFR
>> stacktrace values from the main line.
>>
>> JIRA: https://bugs.openjdk.java.net/browse/JDK-8250928
>> Webrev: http://cr.openjdk.java.net/~jbachorik/8250928/8u/webrev/
> 
> 8u backport looks fine.

Oh wait, hold on a sec.

The original changeset [1] only changes the bit in JfrStackTrace::record_safe. Why does this 
backport change JfrStackTrace::record_safe and JfrStackTrace::record_thread?

-- 
Thanks,
-Aleksey

[1] 
https://hg.openjdk.java.net/jdk/jdk/file/c3cc9ac0ede2/src/hotspot/share/jfr/recorder/stacktrace/jfrStackTrace.cpp