Re: [geomview-users] geomview seg faults if input file is too large?

[David R. <dpr...@gm...>]

Thanks.  It would be handy to have this fixed.  According to
http://www.geomview.org/bugs/ one submits a bug report by sending an
email to this list.  What is the next step?  What is the password for
anonymous cvs checkout of the source code?

Thanks,
David

On Mon, Sep 7, 2009 at 6:22 PM, Frank Peters<fra...@co...> wrote:
> On Mon, 7 Sep 2009 16:28:10 -0400
> David Rideout <dpr...@gm...> wrote:
>
>> Sometimes geomview crashes immediately after I launch it.  Is there an
>> implicit maximum file size?  Enclosed is a sample file which will
>> cause it to crash.  Perhaps it should at least output some error
>> message when this occurs?
>>
>
> I can confirm that the attached file also crashes geomview on
> my system.
>
> But the file size is not to blame.  The segfault occurs after
> the file has been read into geomview.
>
> Using a debugging version of geomview, I get this feedback with
> the GNU Debugger:
>
> Program received signal SIGSEGV, Segmentation fault.
> [Switching to Thread 0x7f8c0715e770 (LWP 11311)]
> 0x00007f8c060aee0d in ListBSPTree (list=0x1712540, bsptree=0x1c1d820, action=0)
>    at listdraw.c:82
> 82      listdraw.c: No such file or directory.
>        in listdraw.c
>
>
> Line #82 of listdraw.c is:
>
> memcpy(lpath, path, pathlen);
>
> A display of the variable lpath shows:
>
> lpath = 0x7fffb21d8dd0 <Address 0x7fffb21d8dd0 out of bounds>
>
> So, for some reason the variable lpath has been set to an out-of-bounds
> memory location causing memcpy to segfault.
>
> Because I don't know how geomview works internally, I can't
> say much more.
>
> Frank Peters
>
>
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