[Bug dyninst/15387] New: Add stapdyn functions to get/set errno

["jistone at redhat dot com" <sourceware-bugzilla at sourceware dot org>]

http://sourceware.org/bugzilla/show_bug.cgi?id=15387

             Bug #: 15387
           Summary: Add stapdyn functions to get/set errno
           Product: systemtap
           Version: unspecified
            Status: NEW
          Severity: enhancement
          Priority: P2
         Component: dyninst
        AssignedTo: systemtap@sourceware.org
        ReportedBy: jistone@redhat.com
    Classification: Unclassified


On entering handlers from within Dyninst, we currently save the current errno
and restore it as we leave, so we don't destroy its value by anything called
from the handler.  However, some scripts may wish to retrieve the process'
original errno for analysis, and maybe even set it to something else.  We could
conceivable provide tapset functions to get/set our saved errno.

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