Core dump with increased recursionlimit
Nick Craig-Wood
nick at craig-wood.com
Tue Oct 12 13:30:11 EDT 2004
<exarkun at divmod.com> wrote:
> On 12 Oct 2004 09:29:58 GMT, Nick Craig-Wood <nick at craig-wood.com> wrote:
> >I've just discovered that my python (Python 2.3.4 from debian package
> > 2.3.4-1 running on debian testing x86 + linux 2.4.26) core dumps when
> > I set recursionlimit very high and do lots of recursion.
>
> You probably have a buggy version of glibc. There is a version
> which automatically sets the stack limit to a fairly small value (I
> forget what the limit is exactly, 2 MB perhaps). If this is the
> case and you strace your program, you will see a setrlimit() call
> near the beginning of the run.
Spot on!
...
getrlimit(RLIMIT_STACK, {rlim_cur=RLIM_INFINITY, rlim_max=RLIM_INFINITY}) = 0
setrlimit(RLIMIT_STACK, {rlim_cur=2044*1024, rlim_max=RLIM_INFINITY}) = 0
...
So its 1 page less than 2 MB.
Reading a bit more - this didn't affect my test C program because it
didn't use pthreads.
http://sources.redhat.com/ml/bug-glibc/2003-06/msg00190.html
I'll look out for a glibc upgrade!
Thanks
--
Nick Craig-Wood <nick at craig-wood.com> -- http://www.craig-wood.com/nick
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