RFR (S) 8216302: StackTraceElement::fill_in can use cached Class.name

[Aleksey Shipilev]

On 1/8/19 8:47 PM, coleen.phillimore at oracle.com wrote:
>> Thanks for the explanation. So, something like this would do?
>>    http://cr.openjdk.java.net/~shade/8216302/webrev.03/
> 
> Yes, this looks better.  I can't imagine why it would be measurably slower, but beats faster with
> low frequency bugs.

Right. I think dealing with handles has non-zero cost. Targeted benchmarks are really sensitive to
most costs. Pushed the patch to jdk-submit.

> http://cr.openjdk.java.net/~shade/8216302/webrev.03/test/hotspot/jtreg/runtime/StackTrace/StackTraceClassCache.java.html
> 
> I have heard that the copyright should also have the Oracle line on it.

There are plenty of Red Hat-added files with only Red Hat copyrights; this is the guidance I
remember having. StackTraceClassCache follows it.

-Aleksey