RFR (XS): 8198560: Remove implicit casts from oop to JavaThread* and jlong*

[Thomas Schatzl]

Hi,

On Thu, 2018-02-22 at 17:44 +0100, Erik Österlund wrote:
> Hi,
> 
> In the current state, oop may be implicitly casted to JavaThread*
> and 
> jlong*. There does not appear to be code relying on these casts, and 
> therefore they should be removed. In the unlikely case this
> operation 
> would make sense, then you may use cast_from_oop<JavaThread*>(obj)
> instead.
> 
> Webrev:
> http://cr.openjdk.java.net/~eosterlund/8198560/webrev.00/
> 
> Bug:
> https://bugs.openjdk.java.net/browse/JDK-8198560
> 

  looks good.

Thomas