RFR (S) 8227766: CheckUnhandledOops is broken in MemAllocator

[coleen.phillimore at oracle.com]

Thanks Erik!
Coleen

On 7/17/19 12:31 PM, Erik Österlund wrote:
> Hi Coleen,
>
> Looks good!
>
> /Erik
>
> On 2019-07-17 18:22, coleen.phillimore at oracle.com wrote:
>>
>> Due to some concerns about MemAllocator performance, and to only 
>> create handles when needed, I have retested smaller change:
>>
>> open webrev at 
>> http://cr.openjdk.java.net/~coleenp/2019/8227766.02/webrev
>>
>> Coleen
>>
>> On 7/17/19 10:49 AM, coleen.phillimore at oracle.com wrote:
>>> Summary: Save oop created in handle more eagerly, so 
>>> CheckUnhandledOops doesn't bash it.
>>>
>>> Also added a test for the case that was failing.  There were a 
>>> couple of changes needed to compile CHECK_UNHANDLED_OOPS with 
>>> slowdebug, but I reverted the makefile changes for doing that 
>>> because I don't think we want it for slowdebug.
>>> Lastly, made some changes to make CheckUnhandledOops easier to 
>>> debug, and removed an unnecessary clearing, since it's also done in 
>>> the transition.
>>>
>>> Tested with hs-tier1-3 with -XX:+CheckUnhandledOops and without.
>>>
>>> open webrev at 
>>> http://cr.openjdk.java.net/~coleenp/2019/8227766.01/webrev
>>> bug link https://bugs.openjdk.java.net/browse/JDK-8227766
>>>
>>> Thanks,
>>> Coleen
>>