[ndnSIM] SIGSEGV when simply assigning one smart pointer to another?

Ashlesh Gawande (agawande) agawande at memphis.edu
Mon Apr 10 13:20:18 PDT 2017

Perhaps you can post the gdb backtrace so that other people can take a look.


From: ndnSIM <ndnsim-bounces at lists.cs.ucla.edu> on behalf of John Baugh <jpbaugh at umich.edu>
Sent: Monday, April 10, 2017 2:55:10 PM
To: ndnsim
Subject: Re: [ndnSIM] SIGSEGV when simply assigning one smart pointer to another?

I think maybe I'm mailing the list when no one is awake :)

If anyone has any ideas, I'd be very interested in hearing them.  This is a true Heisenbug

On Apr 9, 2017 11:36 PM, "John Baugh" <jpbaugh at umich.edu<mailto:jpbaugh at umich.edu>> wrote:
Greetings all,

I posted this question before but received no responses, so I figured I'd give it another shot.

I've updated my Github repository with the updated code:

The scenario in question is jpb-pop1.  The offending code seems to be when I pass my PopularityManager object to a set method, and then do the actual assignment.  I created the PopularityManager as an adapter object (and go-between) between the PStrat (strategy) and the PopularityPolicy (policy).

In order to establish my definition of "popularity", I require the interest information (which PStrat has), and to control caching / replacement ultimately (which is in PopularityPolicy), I need this information about interests.

I am able to print (using cout) just before the assignment occurs, but it seems the segfault happens right then.

I used GDB and it does indeed say there's a SIGSEGV, but I cannot for the life of me figure out why this is happening.  It happens if I try to set the data member (popularityManager) to anything.

So I don't think it's the parameter (or argument) being passed in.

Any assistance would be appreciated.  This may be some peculiar smart pointer issue, but I'm not sure.


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