RFR: Update thread local bad mask during root scanning

[Per Liden]

Thanks for reviewing Erik!

/Per

On 02/22/2018 01:03 PM, Erik Österlund wrote:
> Hi Per,
> 
> I like this. Looks good.
> 
> Thanks,
> /Erik
> 
> On 2018-02-22 08:37, Per Liden wrote:
>> Patch to update the thread local address bad mask during root scanning 
>> while we're anyway walking the thread list (in parallel), instead of 
>> doing a separate single threaded walk over that list.
>>
>> This patch also removes some platform dependent code, and updates the 
>> thread local bad mask on all platforms, even if it's strictly not 
>> needed on e.g. Solaris/SPARC. However, it doesn't hurt performance 
>> wise, and keeps the model nicely homogeneous across platforms.
>>
>> Webrev: 
>> http://cr.openjdk.java.net/~pliden/zgc/update_thread_local_address_bad_mask/webrev.0 
>>
>>
>> cheers,
>> Per
>>
>