Re: [perl #33945] Segmentation fault with deep recursion in regex engine

On Wed, Jan 26, 2005 at 10:07:17PM -0000, A. Pagaltzis wrote:
> Deep recursion the regex engine causes a segfault. While there's
> nothing that can really be done other than aborting the program
> in that case, that should at least be done in orderly fashion.
> 
> The condition can easily be reproduced thusly:
> 
> 	perl -le'my $rx; $rx=qr/(??{ $rx })/; ""=~$rx'

I can't really see what else Perl can do. The segfault happens when Perl
extends the stack too far. This can't be avoided. The SIGSEGV could be
caught, but then there's nothing sensible that perl could then do to
retrieve the situation.


-- 
My get-up-and-go just got up and went.

• Re: [perl #33945] Segmentation fault with deep recursion in regex engine by A. Pagaltzis
• Re: [perl #33945] Segmentation fault with deep recursion in regex engine by Dave Mitchell
• Re: [perl #33945] Segmentation fault with deep recursion in regex engine by A. Pagaltzis
• Re: [perl #33945] Segmentation fault with deep recursion in regex engine by Dave Mitchell
• [perl #33945] Segmentation fault with deep recursion in regex engine by A. Pagaltzis
• Re: [perl #33945] Segmentation fault with deep recursion in regex engine by Dave Mitchell