[ndnSIM] Not able to visualise the simulated code

[Ygor Amaral]

Hi Sai,

You are experiencing a memory allocation problem. ns-3 has a smart pointer
mechanism and you are overloading the reference counting system.

Review your code in the snippets that you created ns-3 objects.

The limit of references is given by uint32_t. It is an acceptable value,
the error is not the limit.

Regards,
Ygor Amaral



On Sat, Apr 24, 2021 at 2:03 AM sai gautams <saigautam96 at gmail.com> wrote:

> Hi Yogr,
> I'm facing the following issue when I try to debug my code in ndnSIM. I
> don't understand how to deal with this fault. Can you please help me out?
> Thank you.
>
> Program received signal SIGSEGV, Segmentation fault. 0x00007ffff7f584d1 in
> ns3::SimpleRefCount<ns3::Object, ns3::ObjectBase, ns3::ObjectDeleter>::Ref
> (this=0x6465697272616320) at ./ns3/simple-ref-count.h:107 107    NS_ASSERT
> (m_count < std::numeric_limits<uint32_t>::max())
>
> On Fri, Apr 16, 2021 at 12:39 AM Ygor Amaral <ygor.amaral at gmail.com>
> wrote:
>
>> Hi Sai,
>>
>> I think the documentation does not explain in this way how you configured
>> it. But in summary...
>>
>> To configure in debug mode:
>>      - ./waf configure (or ./waf configure -d debug)
>>
>>      ---- Summary of optional NS-3 features (CONFIGURE OUTPUT):
>>      Build profile                 : debug
>>
>> To configure in optimized mode:
>>      - ./waf configure -d optimized
>>
>>      ---- Summary of optional NS-3 features: (CONFIGURE OUTPUT)
>>      Build profile                 : optimized
>>
>>
>> Regards,
>> Ygor Amaral
>>
>> On Tue, Apr 13, 2021 at 12:37 AM sai gautams <saigautam96 at gmail.com>
>> wrote:
>>
>>> Hi Ygor,
>>>
>>> Thank you for the information. I tried compiling in the debugging
>>> mode(./waf configure --debug) as given in ndnSIM documentation. But it is
>>> throwing me an error of no such option.
>>>
>>> On Tue, Apr 13, 2021 at 5:45 AM Ygor Amaral <ygor.amaral at gmail.com>
>>> wrote:
>>>
>>>> Hi Sai,
>>>>
>>>> This output log did not give much information.
>>>>
>>>> Did you compile ndnSIM in debug or optimized mode? In the development
>>>> stage, prefer the debug mode, use the optimized mode only for the final
>>>> simulation.
>>>>
>>>> I do not believe that the error is the number of nodes. If you are a
>>>> new user, the first tip is to read the ns3 and ndnSIM documentation.
>>>>
>>>> To try to solve this problem, read about the log module of ns-3, it
>>>> will help you to find the problem.
>>>> https://www.nsnam.org/docs/release/3.33/tutorial/html/tweaking.html#using-the-logging-module
>>>>
>>>> If you use any C ++ IDE (e.g.: Eclipse, CLion ...), you can do remote
>>>> debugging to use breakpoints and other interesting debug features provided
>>>> by these IDEs.
>>>>
>>>> So, you would run as follows:
>>>>
>>>> ./waf --command-template="gdbserver localhost:1234 %s" --run=ndn-complex
>>>>
>>>> Regards,
>>>> Ygor Amaral
>>>>
>>>> On Mon, Apr 12, 2021 at 4:21 AM sai gautams via ndnSIM <
>>>> ndnsim at lists.cs.ucla.edu> wrote:
>>>>
>>>>>
>>>>> Hello everyone,
>>>>>
>>>>> I tried to write a code with 20 nodes (P2P) but when I try to
>>>>> visualize its build but for some reason, I couldn't. Can someone help me
>>>>> with this issue? I'm new to ndnSIM.
>>>>>
>>>>> ./waf --run=ndn-complex --vis
>>>>> Waf: Entering directory `/home/smandapati/ndnSIM/ns-3/build'
>>>>> [2772/3269] Compiling src/ndnSIM/examples/ndn-complex.cpp
>>>>> [3227/3269] Linking build/src/ndnSIM/examples/ns3-dev-ndn-complex-debug
>>>>> Waf: Leaving directory `/home/smandapati/ndnSIM/ns-3/build'
>>>>> Build commands will be stored in build/compile_commands.json
>>>>> 'build' finished successfully (7.654s)
>>>>> Command
>>>>> ['/home/smandapati/ndnSIM/ns-3/build/src/ndnSIM/examples/ns3-dev-ndn-complex-debug',
>>>>> '--SimulatorImplementationType=ns3::VisualSimulatorImpl'] terminated with
>>>>> signal SIGSEGV. Run it under a debugger to get more information (./waf
>>>>> --run <program> --command-template="gdb --args %s <args>").
>>>>>
>>>>> --
>>>>>
>>>>> *Sai Gautam Mandapati*
>>>>>
>>>>> Deakin University
>>>>>
>>>>> Doctor of Philosophy Student
>>>>>
>>>>> Higher Degree by Research
>>>>>
>>>>> Faculty of Science, Engineering and Built-in Environment
>>>>>
>>>>> E-mail: saigautam96 at gmail.com
>>>>>
>>>>> http://www.linkedin.com/in/sai-gautam-mandapati
>>>>> _______________________________________________
>>>>> ndnSIM mailing list
>>>>> ndnSIM at lists.cs.ucla.edu
>>>>> http://www.lists.cs.ucla.edu/mailman/listinfo/ndnsim
>>>>>
>>>>
>>>
>>> --
>>>
>>> *Sai Gautam Mandapati*
>>>
>>> Deakin University
>>>
>>> Doctor of Philosophy Student
>>>
>>> Higher Degree by Research
>>>
>>> Faculty of Science, Engineering and Built-in Environment
>>>
>>> E-mail: saigautam96 at gmail.com
>>>
>>> http://www.linkedin.com/in/sai-gautam-mandapati
>>>
>>
>
> --
>
> *Sai Gautam Mandapati*
>
> Deakin University
>
> Doctor of Philosophy Student
>
> Higher Degree by Research
>
> Faculty of Science, Engineering and Built-in Environment
>
> E-mail: saigautam96 at gmail.com
>
> http://www.linkedin.com/in/sai-gautam-mandapati
>
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