RFR: JDK-8171084: heapdump/JMapHeapCore fails with java.lang.RuntimeException: Heap segment size overflow

[Jini George]

Hi, Requesting for reviews for the following SA issue:
https://bugs.openjdk.java.net/browse/JDK-8171084 
<cid:part1.09070505.06000302@oracle.com>
Webrev:http://cr.openjdk.java.net/~jgeorge/8171084/webrev.00/ 
<http://cr.openjdk.java.net/%7Ejgeorge/8171084/webrev.00/>

Thanks,
Jini.