[ndnSIM] Simulation terminated with signal SIGSEGV - possible bug

[John Baugh]

Thiago,

I am sorry to ask you to do this, but could you perhaps upgrade your
Valgrind and run again if possible?  I've been looking into your issue and
I found a few places that said Valgrind 3.11.0 doesn't recognize the
random_device::_M_getval()  instruction so Valgrind is exiting too soon
before it finds the actual problem, in my estimation.  The _M_getval is
used several calls deep from some of the ndnSIM code, and Valgrind doesn't
recognize it, so it's terminating and not giving much useful information.

Thanks,

John



On Sun, May 6, 2018 at 12:58 PM, Thiago Teixeira <tteixeira at umass.edu>
wrote:

> Hi John,
>
>
>
> Please find the Valgrind output. I ran  both Valgrind leak-check=yes and
> leak-check=full
>
>
>
> https://gist.github.com/thiteixeira/8c4fd1deb884b548d1f071ebb1bee0
> 43#file-valgrind-leak-check-full-txt
>
>
>
> https://gist.github.com/thiteixeira/8c4fd1deb884b548d1f071ebb1bee0
> 43#file-valgrind-leak-check-yes-txt
>
>
>
>
>
> Thanks,
>
> TT
>
>
>
> *From:* John Baugh [mailto:jpbaugh at umich.edu]
> *Sent:* Sunday, May 6, 2018 8:40 AM
> *To:* Thiago Teixeira <tteixeira at umass.edu>
> *Cc:* Junxiao Shi <shijunxiao at email.arizona.edu>; ndnsim <
> ndnsim at lists.cs.ucla.edu>
>
> *Subject:* Re: [ndnSIM] Simulation terminated with signal SIGSEGV -
> possible bug
>
>
>
> Looks like a heap corruption of some sort.
>
>
>
> Can we try valgrind?
>
>
>
> This may help:. http://www.lists.cs.ucla.edu/pipermail/ndnsim/
> 2017-July/003991.html
>
>
>
> Thanks
>
>
>
> John
>
>
>
> On Sun, May 6, 2018, 7:35 AM Thiago Teixeira <tteixeira at umass.edu> wrote:
>
> Hi,
>
>
>
> Thanks for your answers. I ran the simulation again and posted the gdb
> back trace full on the Gist (https://gist.github.com/thiteixeira/
> 8c4fd1deb884b548d1f071ebb1bee043#file-gbd_bt_full_output-txt)
>
>
>
> @John, I will try ndnSIM 2.4, thanks.
>
>
>
> Best,
>
> Thiago
>
>
>
> *From:* John Baugh [mailto:jpbaugh at umich.edu]
> *Sent:* Saturday, May 5, 2018 6:16 PM
> *To:* Thiago Teixeira <tteixeira at umass.edu>
> *Cc:* ndnsim at lists.cs.ucla.edu
> *Subject:* Re: [ndnSIM] Simulation terminated with signal SIGSEGV -
> possible bug
>
>
>
> Thiago,
>
>
>
> I was able to run your scenario in ndnSIM 2.4.  So I suspect this is
> either an introduced bug in the simulator itself, or perhaps there's
> something not correctly configured in your environment.
>
>
>
> I can't reproduce the error, so as Dr. Shi suggested, it would be useful
> to see your GDB and/or Valgrind output.
>
>
>
> Thanks!
>
>
>
> John
>
>
>
> On Sat, May 5, 2018 at 9:23 AM, Thiago Teixeira <tteixeira at umass.edu>
> wrote:
>
> Hi all,
>
>
>
> We have a scenario where nodes have two interfaces, one wireless and one
> wired. Nodes are position on a grid fashion and the producer is located in
> the center of the grid.
>
> We run this scenario for 4,000 seconds, but the simulation ends at 2,099
> seconds with the code
>
>     Command ['/home/vagrant/ndnSIM/ns-3/build/scratch/ndn-debug-scenario']
> terminated with signal SIGSEGV. Run it under a debugger to get more
> information (./waf --run <program> --command-template="gdb --args %s
> <args>").
>
>
>
> Running with GDB didn’t offer any other insights. Here are the steps to
> reproduce the issue:
>
>
>
> #### Expected behavior
>
> Simulations run until the specified time Simulator::Stop(Seconds(4000.0));
>
>
>
> #### Actual behavior
>
> Simulations crash (see error message below) before
> Simulator::Stop(Seconds(4000.0));
>
>
>
> `Command ['/home/vagrant/ndnSIM/ns-3/build/scratch/ndn-debug-scenario']
> terminated with signal SIGSEGV. Run it under a debugger to get more
> information (./waf --run <program> --command-template="gdb --args %s
> <args>").`
>
>
>
> #### Code to reproduce the problem
>
> See Gist:
>
> https://gist.github.com/thiteixeira/8c4fd1deb884b548d1f071ebb1bee043
>
>
>
> #### ndnSIM version
>
> ndnSIM-2.5-2-ge674a01
>
>
>
> #### Operating system and version
>
> Ubuntu 16.04.4 LTS
>
> memory size: 2000MiB
>
> 1 cpu: Intel(R) Core(TM) i7-7700 CPU @ 3.60GHz
>
>
>
> #### Other relevant information
>
> compiled ndnSIM using the optimized version:
>
> ./waf configure -d optimized
>
>
>
> Increasing the number of nodes makes the simulation crash at an earlier
> time.
>
>
> _______________________________________________
> ndnSIM mailing list
> ndnSIM at lists.cs.ucla.edu
> http://www.lists.cs.ucla.edu/mailman/listinfo/ndnsim
>
>
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://www.lists.cs.ucla.edu/pipermail/ndnsim/attachments/20180507/5df95835/attachment.html>