RFR 8149790: NegativeArraySizeException with hprof

[Lois Foltan]

George,

I think this looks good.  Copyright needs updating in 
FileReadBuffer.java, MappedReadBuffer.java & ReadBuffer.java.

Thanks,
Lois

On 8/14/2017 11:31 AM, George Triantafillou wrote:
> Please review this change to fix NegativeArraySizeException test 
> failures with hprof:
>
> JBS: https://bugs.openjdk.java.net/browse/JDK-8149790
> webrev: 
> http://cr.openjdk.java.net/~gtriantafill/8149790-webrev/webrev/index.html 
> <http://cr.openjdk.java.net/%7Egtriantafill/8149790-webrev/webrev/index.html> 
>
>
> The original patch was contributed by Andreas Eriksson.  Tested 
> locally on Linux-x64 and with RBT tiers 2 through 5.
>
> Thanks.
>
> -George
>