Re: Abort backtrace when consecutive zero PCs?

Michael Chastain
2004-09-15T18:47:30Z

Andrew Cagney <cagney@gnu.org> wrote:
> While we definitly need to allow a backtrace through a single zero PC
> (for a NULL pointer call - signull.exp) should we make GDB abort when
> two or more consecutive frames have a zero PC?

Perhaps abort it after an identical frame is seen a second time?
It's not the zero-ness that kills us, it's the repetition.

The naive check would take O(n^2/2) time for n stack frames,
but if you use a clever data structure, it would be O(n lg n) time.

Michael