Request for review: 6310967: SA: jstack -m produce failures in output

[Poonam Bajaj]

Hi,

Please review this fix for bug 6310967 
<http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=6310967>.

6310967 <http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=6310967>: 
SA: jstack -m produce failures in output

http://cr.openjdk.java.net/~poonam/6310967/webrev.00/

Problem: jstack -m fails with UnalignedAddressException.The problem is 
that while finding the caller frame of a frame in sender() method, we 
don't check the validity of the frame pointer (rbp / ebp).

These changes add a simple check that the frame pointer(rbp) should be a 
valid pointer on the stack by making sure that it is not less than the 
stack
pointer(rsp).


Thanks,
Poonam

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