[Bug c++/16843] GDB relies on the mangled name of a subprogram to be a prefix of the enclosing class name

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

https://sourceware.org/bugzilla/show_bug.cgi?id=16843

Tom Tromey <tromey at redhat dot com> changed:

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                 CC|                            |tromey at redhat dot com

--- Comment #3 from Tom Tromey <tromey at redhat dot com> ---
(In reply to David Blaikie from comment #0)

> If GDB doesn't rely on this assumption and can handle some differences
> between naming (for example GCC always uses "long int" even though c++filt
> demangles this as "long", 'x' versus (char)120, etc, etc... ) then it's just
> missing a case to handle the bug reported against GCC.

gdb doesn't rely on this.
Instead it does name canonicalization.

> In this case, "ptype f" will give a declaration of foo<1> because the
> difference in mangled names (foo<'\001'> versus foo<'\x01'>) but other
> examples ('long int' versus 'long') don't exhibit this problem.

This is a bit curious since I was under the impression that gdb
demangled the linkage name, canonicalized it, and then used that name.
So, barring cases where "physname" must be computed, I thought gdb
wouldn't be using the name in the debuginfo.

But, no big deal, some part of my understanding must be wrong.
Probably a bug in the canonicalization code.

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