[Bug c++/13735] New: set print vtbl bugs

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

http://sourceware.org/bugzilla/show_bug.cgi?id=13735

             Bug #: 13735
           Summary: set print vtbl bugs
           Product: gdb
           Version: 7.4
            Status: NEW
          Severity: normal
          Priority: P2
         Component: c++
        AssignedTo: unassigned@sourceware.org
        ReportedBy: tromey@redhat.com
    Classification: Unclassified


Right now 'set print vtbl' doesn't do much of value.
It seems to print just a single vtable entry.

There does not seem to be a very good way to
determine the size of the vtable from the information
we have available.
All I can think of is that we could examine all the
methods in the current class, compute their vtable offsets,
and then use this to determine the maximum vtable size.
(Perhaps with some hand-waving around virtual bases, I haven't
considered that far.)

A few other comments --

It would be nice to rename this to "set print vtable", as "vtbl"
is unnecessarily terse.

It would be nice to have an "info vtable EXPR" command, to avoid
dealing with stuff like 'print a.'_vtbl_A'.

The documentation needs some updating in this area.

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