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

[Jim Blandy <jimb@codesourcery.com>]

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.