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

[serguei.spitsyn at oracle.com]

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