RFR: 8162563: Fix double checked locking in System.console()

[David Holmes]

On 27/07/2016 6:35 AM, Martin Buchholz wrote:
> Hi Xueming,
>
> I'd like you to do a wee code review,
>
> http://cr.openjdk.java.net/~martin/webrevs/openjdk9/Console-double-checked-locking/

Humour me - where is the bug? We're simply retrieving the existing 
Console singleton that is safely published through static 
initialization. All this seems to do is improve the performance if a 
race occurs.

AFAICS the use of locking here isn't necessary at all.

Cheers,
David