RFR: Print heap addresses in hs_err

[Aleksey Shipilev]

On 01/11/2017 06:35 PM, Roman Kennke wrote:
> this change makes ShenandoahHeap::print_on() also print the start and
> end of the heap, plus the information from VirtualSpace. I adapted the
> latter from VirtualSpace::print_on() instead of calling it because it's
> #ifndef PRODUCT. It now prints this info:
> 
> 
> Heap
> Shenandoah Heap total = 4194304 K, used 212992 K  [0x00000006c0000000,
> 0x00000007c0000000) Region size = 2048K 
> Virtual space:
>  - committed: 4294967296
>  - reserved:  4294967296
>  - [low, high]:     [0x00000006c0000000, 0x00000007c0000000]
>  - [low_b, high_b]: [0x00000006c0000000, 0x00000007c0000000]
> 
> 
> http://cr.openjdk.java.net/~rkennke/printheapaddrs/webrev.02/
> 
> Ok to push?

Ok.

-Aleksey