Re: [RFC] Move the frame zero PC check earlier

[PAUL GILLIAM <pgilliam@us.ibm.com>]

On Thu, 2006-05-18 at 09:53 -0700, Jim Blandy wrote:
> Andrew STUBBS <andrew.stubbs@st.com> writes:
> > Jim Blandy wrote:
> >> For the record, at the top of this thread I said I thought it was
> >> fine, too.  I've run into these often enough due to deliberate
> >> attempts by runtimes to terminate the stack that I think it outweighs
> >> the (minor, to my mind) value of seeing a 0x00000000 frame that
> >> indicates an actual error.
> >> GDB should be honest with the user about what it finds, but I don't
> >> think we can be a multi-platform debugger and be that picky about
> >> confining each bit of logic to exactly the platforms that promise to
> >> uphold it.
> >
> > How about adding a command:
> >
> > set backtrace terminate-on-zero-pc on|off
> >
> > and let the user decide. Set it to 'on' by default on the principle
> > that, if they aren't aware of the possibility, users don't want to see
> > zero frames they don't understand.
> >
> > Just a thought.
> 
> Well, that would lift the burden of the decision from our shoulders
> (that is, GDB developers', not restricted to the folks here) to the
> users'.  I think we're probably in a better position to make it.

No, that lifts the burden of deciding for *all* users from our
shoulders, allowing those users who understand the issues to override
our decision.

On the other hand, it would add one more user tweek that most users
would not understand or care about.

It's a hard call.

I'd vote for the new command and classify it as obscure.

-=# Paul #=-