[Python-Dev] stack check on Unix: any suggestions? (original) (raw)

Charles G Waldman cgw@fnal.gov
Thu, 31 Aug 2000 10:50:38 -0500 (CDT)

Guido van Rossum writes:

Please try this again on various platforms with this version:

i = 0
class C:
  def __getattr__(self, name):
      global i
      print i
      i += 1
      return self.name # common beginners' mistake

C() # This tries to get __init__, triggering the recursion

I get 5788 iterations on Red Hat Linux 6.2 (ulimit -c says 8192; I have no idea what units).

I get a core dump after 4824 iterations on a not-quite-Red-Hat box, with an 8MB stack limit.

What about the idea that was suggested to use a sigsegv catcher? Or reading info from /proc (yes, there is a lot of overhead here, but if we do in infrequently enough we might just get away with it. It could be a configure-time option disable by default). I still think there are even more tricks possible here, and we should pursue this after 2.0b1. I volunteer to help work on it ;-)