RFR: Update thread local bad mask during root scanning

[Erik Österlund]

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
>