RFR 8029178: Parallel class loading test anonymous-simple gets SIGSEGV in Metaspace:,:contains

[Coleen Phillmore]

Thanks, Serguei!
Coleen

On 1/2/2014 8:30 PM, serguei.spitsyn at oracle.com wrote:
> Hi Coleen,
>
> The fix looks Ok to me.
>
> Thanks,
> Serguei
>
> On 1/2/14 9:25 AM, Coleen Phillmore wrote:
>> Summary: Metaspace::contains cannot look at purged metaspaces while 
>> CMS concurrently deallocates them.
>>
>> Removed 2 calls to is_metaspace_object where the object may be in a 
>> deallocated metaspace.  Removed walking virtual space lists for 
>> determining contains because the virtual space list can change 
>> concurrently with the walk.   CLDG::contains is slower but no 
>> slowdowns with testing were observed.
>>
>> Tested by SQE testbase tests, jtreg tests.   Functional testing by 
>> parallel class loading tests and nsk/coverage/arguments/arguments008 
>> (ie. calls Method::is_valid_method)
>>
>> open webrev at http://cr.openjdk.java.net/~coleenp/8029178/
>> bug link https://bugs.openjdk.java.net/browse/JDK-8029178
>>
>> Thanks,
>> Coleen
>