[Bug c++/15176] New: provide convenience variable holding exceptionobject

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

http://sourceware.org/bugzilla/show_bug.cgi?id=15176

             Bug #: 15176
           Summary: provide convenience variable holding exception object
           Product: gdb
           Version: unknown
            Status: NEW
          Severity: normal
          Priority: P2
         Component: c++
        AssignedTo: unassigned@sourceware.org
        ReportedBy: tromey@redhat.com
    Classification: Unclassified


For conditional "catch catch" and "catch throw"s, it would
be nice to have a convenience variable that holds the current
exception object.  Something like:

catch throw if $_exception == 57

This is maybe related to PR 13588 -- if we go the probe
point route, the probe should expose this information as well.

The ideal thing would be to use the typeinfo to construct
an object of the right type in gdb.

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