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Date: Thu, 28 Jul 2005 10:17:46 -0400 (EDT)
From: Igor Pechtchanski <pechtcha AT cs DOT nyu DOT edu>
Reply-To: cygwin AT cygwin DOT com
To: Dave Korn <dave DOT korn AT artimi DOT com>
cc: cygwin AT cygwin DOT com
Subject: RE: Bug identified [was RE: perl - segfault on "free unused scalar"]
In-Reply-To: <SERRANOiSzuaWSnlsIh00000034@SERRANO.CAM.ARTIMI.COM>
Message-ID: <Pine.GSO.4.61.0507281009000.27026@slinky.cs.nyu.edu>
References: <SERRANOiSzuaWSnlsIh00000034 AT SERRANO DOT CAM DOT ARTIMI DOT COM>
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On Thu, 28 Jul 2005, Dave Korn wrote:

> ----Original Message----
> >From: Igor Pechtchanski
> >Sent: 28 July 2005 14:58
>
> > Hmm, but shouldn't this code fail regardless of the value of
> > heap_chunk_in_mb?  Why does increasing heap_chunk_in_mb make this
> > succeed?
>
>   Perhaps it only makes it succeed if you increase heap_chunk_in_mb
> until that initial heap chunk is big enough?  Perhaps just because the
> memory map gets re-arranged and dll_list::alloc manages to find a page
> in between the dll and the heap?  You could always check it out in a
> debugger if you like; I've got to leave this for the moment because I
> was doing that in my lunchbreak, which is long over now :-(

Dave,

I'm unfortunately not set up to do this kind of debugging ATM (heavy use
of Cygwin for real work, and no other available machine, so can't play
with heap_chunk_in_mb).  That's why I appreciate your doing this.  If you
are interested in pursuing this later, it would be nice to find out how
this behavior relates to the value of heap_chunk_in_mb.
	Igor
-- 
				http://cs.nyu.edu/~pechtcha/
      |\      _,,,---,,_		pechtcha AT cs DOT nyu DOT edu
ZZZzz /,`.-'`'    -.  ;-;;,_		igor AT watson DOT ibm DOT com
     |,4-  ) )-,_. ,\ (  `'-'		Igor Pechtchanski, Ph.D.
    '---''(_/--'  `-'\_) fL	a.k.a JaguaR-R-R-r-r-r-.-.-.  Meow!

If there's any real truth it's that the entire multidimensional infinity
of the Universe is almost certainly being run by a bunch of maniacs. /DA

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