Re: Infinite loop in make_cv_type

[Richard Earnshaw <rearnsha@arm.com>]

> Daniel Jacobowitz wrote:
> > 
> > On Fri, Feb 22, 2002 at 11:40:38AM +0000, Richard Earnshaw wrote:
> > > While testing cplusfuncs.exp on ARM/NetBSD (a.out) with gcc-3 current, gdb
> > > is getting stuck in an infinite loop in gdbtypes.c:make_cv_type and I'm
> > > trying to work out what this is supposed to do.  The scenario I'm seeing
> > > is that the type ring has become corrupted as follows along the
> > > TYPE_CV_TYPE chain
> > >
> > >           type
> > >           |
> > >             V
> > >         var1<----+
> > >             |      |
> > >             +------+
> > >
> > > Given that this is supposed to be a loop, it's clearly bogus.
> > 
> > Definitely.
> 
> Hang on, I'm pretty sure that the cv type chain
> is supposed to do that.  The pointer loop is 
> intentional.

Well if that's the case then the top loop in make_cv_type is completely 
bogus, since it expects to iterate until ntype==type (where type is the 
base type).

The comment in gdbtypes.h says that cv_type is a ring of the type and its 
variants.

R.