RR(S): JDK-7189721 nightly tests failed on JDI attaching

[Dmitry Samersoff]

Hi Everyone,

Please, review the changes.

http://cr.openjdk.java.net/~dsamersoff/JDK-7189721/webrev.01/

Summary:

If for some reason elf section with section names is not loaded to cache
it attempts to read data using NULL section pointer.


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