Re: [Rd] Stack checking, core dumps, and embedding R

From: A.J. Rossini <blindglobe_at_gmail.com>
Date: Wed 12 Apr 2006 - 04:47:37 GMT

On 4/12/06, Simon Urbanek <simon.urbanek@r-project.org> wrote:
> On Apr 11, 2006, at 5:34 AM, A.J. Rossini wrote:
>
> > I've been experiencing some interesting stack warnings recently
> > when moving from R 2.2.x to the R 2.3.0 series and the R 2.4.0
> > series. In particular, I'm getting warnings of "Error: C stack
> > usage is too close to the limit" before segfaulting, and this
> > wasn't happening under the 2.2.x series.
> >
> > Here's the question statement: (ONLY) In the situation where one
> > is embedding R, is anyone else seeing this occur with recent (past
> > 2 weeks) versions of R (both the 2.3.x and 2.4.x series)?
> >
>
> When embedding R, the stack base is set to -1 (which is almost
> certainly wrong) if R cannot find the stack base using some system
> method. I have just fixed the detection for OS X, so you shouldn't
> get that message there anymore. However, I was wondering why to not
> set it to something reasonable - even if we are not the main
> application, IMHO less harm is done setting it to something based on
> the current stack pointer than using -1. The status quo relies on the
> embedding application to set the stack base - I don't know if that's
> a good idea. Opinions?

Ah... I see what you mean, Simon, which would explain the stack #'s I was popping out (I'd changed the warning which occurs when stack is within 5% (?) of max, to show me what it was talking about -- also, your point explains why this happens nearly immediately.

Thanks all, I'd forgotten about ulimits. best,
-tony

blindglobe@gmail.com
Muttenz, Switzerland.
"Commit early,commit often, and commit in a repository from which we can easily roll-back your mistakes" (AJR, 4Jan05).



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