Philippe Waroquiers be2da24d6c Fix incorrect (or infinite loop) unwind on RHEL7 amd64 64 bits. ...

Same kind of problems as explained and fixed in revision 15720:
In some cases, unwinding always retrieves the same pc/sp/bp.

Fix for 64 bits is similar: stop unwinding if the previous sp is >= new sp



git-svn-id: svn://svn.valgrind.org/valgrind/trunk@15794

2016-02-17 22:41:14 +00:00

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