Re: Weird Crash - "WAITING_TO_RUNNING"

[David Fifield <david () bamsoftware com>]

On Fri, Dec 03, 2010 at 11:17:49AM -0700, Nathan wrote:
> On Tue, Nov 23, 2010 at 2:59 PM, David Fifield <david () bamsoftware com> wrote:
> > I looked over the code and I can't find what might be causing the change
> > in run time. I attached four different versions of nse_main.lua that
> > make incremental changes. Please try running each of the four and report
> > the times you get. Just copy each one over nse_main.lua in turn.
> >
> > David Fifield
>
> Sorry for the delay, it's been a very busy work week.  Here are the
> measurements you asked for with your custom versions of nse_main.lua.
> Please note that the values will fluctuate ~2% from run to run, but
> within about that margin of error the runs were very consistent with
> themselves.  Also, these were all run with nmap 5.35DC1, with
> nse_main.lua replaced by the file indicated.
>
> nse_main.lua.1: 53732 kB RAM, 5m40s
>
> nse_main.lua.2: 53588 kB RAM, 5m21s
>
> nse_main.lua.3: 55512 kB RAM, 5m27s
>
> nse_main.lua.4: 54352 kB RAM, 5m22s
>
> Since none of those seem to display any problems, I went and ran a
> bunch of other things:
>
> 1) Here's the nse_main.lua pulled from 5.36TEST2 and copied over into 5.35DC1
>
> 54448 kB RAM, 5m23s
>
> 2) Same as #1, but with the CONCURRENCY_LIMIT lowered to 100
>
> 54312 kB RAM, 5m32.126s
>
> 3) Here's the vanilla nmap 5.36TEST2 on the same machine (when I run
> this one, I compile it but don't install it, then I run it from the
> directory it was compiled in).
>
> 94532 kB RAM, 14m48s

When you are running from the same directory, do you use "--datadir ."?
If not, it might be referring to the wrong nse_main.lua (the installed
one). Try your command with

nmap --datadir . <args..>

> So what really mystifies me is #1 up there.  It's the nse_main.lua
> from 5.36TEST2 with a CONCURRENCY_LIMIT of 1000, and yet it seems to
> run fine.  And then that same file running under nmap 5.36TEST2
> performs horribly.  Perhaps the problem is with some other change in
> 5.36TEST2, and not in nse_main.lua.
>
> Please let me know if you would like me to try anything else out.

I looked through the logs and identified revisions that are more likely
to have changed something in NSE betweern 5.35DC1 and 5.36TEST1. I know
this is asking a lot, but if the --datadir doesn't solve it, please try
building and testing each of these revisions:

19514 19515 20266 20267 20632 20633

Starting from a Subversion checkout, you will run

svn update --ignore-externals -r 19514 . nbase ncat nping nsock zenmap

Then build and test, using "--datadir .". Then move on to 19515, 20266,
etc. (You don't have to check out again every time.)

David Fifield
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