Review request: 8004697: SIGSEGV on Solaris sparc with -XX:+UseNUMA

[Stefan Karlsson]

http://cr.openjdk.java.net/~stefank/8004697/webrev.00/

The JVM crashes because it accidentally frees memory in the survivor 
regions, at one point where it is supposed to only free freeing memory 
in the eden.

The code in os::scan_pages(start, end, ...) in solaris_os.cpp looks at 
pages starting beyond 'end'. This causes 
MutableNUMASpace::LGRPSpace::scan_pages to free memory outside eden, 
when the last page starts in, but ends outside of eden.

Testing: The JVM used to crash within in a couple of minutes. With the 
patch, the test has been running over the weekend without any crashes.

thanks,
StefanK