RFR(XXS) 8203635: JFR sampler thread does not record stack info

[Zhengyu Gu]

Thanks for the review, Aleksey.

On 05/22/2018 01:45 PM, Aleksey Shipilev wrote:
> On 05/22/2018 07:40 PM, Zhengyu Gu wrote:
>> Please review this trivial change that added record_stack_base_and_size() call to JFR sampler
>> thread, so NMT can count it correctly.
>>
>> Bug: https://bugs.openjdk.java.net/browse/JDK-8203635
>> Webrev: http://cr.openjdk.java.net/~zgu/8203635/webrev.00/
> 
> Looks good to me. I wish this was handled in superclass initialization, so no one would miss this.

Agree! However, it is a bit tricky, as the call has to be made from 
*current* thread.

Thanks,

-Zhengyu

> 
> -Aleksey
>