RFR(S): JDK-7076820 assert(addr != 0) failed: address sanity check in PerfMemory::detach with -XX:-UsePerfData

[Dmitry Samersoff]

Hi Everybody,

Please review the fix.

http://cr.openjdk.java.net/~dsamersoff/JDK-7076820/webrev.01/

The fix explicitly checks for UsePerfData and if it's false make
Perf:detach a NOP.


-Dmitry

-- 
Dmitry Samersoff
Oracle Java development team, Saint Petersburg, Russia
* I would love to change the world, but they won't give me the sources.