[10] RFR: 8183573: Refactor CodeHeap and AOTCodeHeap to devirtualize hot methods

[Claes Redestad]

Thanks for the quick review, Vladimir!

/Claes

On 2017-07-05 21:00, Vladimir Kozlov wrote:
> Looks good. Thank you, Claes, for optimizing it.
>
> Vladimir
>
> On 7/5/17 11:50 AM, Claes Redestad wrote:
>> Hi,
>>
>> we can improve performance of all stack walking operations by 
>> refactoring
>> the AOTCodeHeap and CodeHeap classes so that the contains and 
>> contains_blob
>> methods can be consolidated into one devirtualized implementation 
>> each, which
>> allows us to inline the code to determine which code heap a code blob 
>> resides
>> in, reducing the number of virtual calls per frame.
>>
>> Webrev: http://cr.openjdk.java.net/~redestad/8183573/hotspot.00/
>> Bug: https://bugs.openjdk.java.net/browse/JDK-8183573
>>
>> Testing: JPRT -testset hotspot, all AOT and compiler jtreg tests pass
>> locally.
>>
>> Thanks!
>>
>> /Claes
>>
>>