Re: Slow handling of C++ symbol names

[Ian Lance Taylor <ian@wasabisystems.com>]

Daniel Jacobowitz <drow@mvista.com> writes:

> On Wed, Dec 03, 2003 at 12:34:31PM -0500, Ian Lance Taylor wrote:
> > Daniel Jacobowitz <drow@mvista.com> writes:
> > 
> > > GDB never does set DMGL_VERBOSE.  Are you sure the old demangler
> > > wouldn't produce that without DMGL_VERBOSE?
> > > 
> > > Maybe the old demangler had a test reversed.  ISTR that c++filt passes
> > > DMGL_VERBOSE, and that generates std::string rather than
> > > std::basic_string for the above.
> > 
> > Well, hmmm.  The code looks right to me.  When I run my copy of
> > c++filt built with the old demangler, I get the long string, as
> > expected.
> > 
> > I note that DMGL_VERBOSE was only added on 2002-02-05, so if you're
> > using a c++filt from sources before that you will get the smaller
> > demangling.
> 
> I'm using one from binutils as of a month or so ago, and I get the
> short string.  Hmm.  I don't know quite what's going on.

Me neither.

Everything makes sense to me and I get the results I expect.  If we
want to pursue this further, though it may not matter much, I think
you need to debug your c++filt.  See if flag_verbose is set.  The
relevant function is called demangle_substitution().  The first call
to the function will call result_add() with either std::string or the
longer version.

Ian