Bug 814

Summary:	Function logging causing assert in wireless examples
Product:	ns-3	Reporter:	Josh Pelkey <jpelkey>
Component:	wifi	Assignee:	ns-bugs <ns-bugs>
Status:	RESOLVED FIXED
Severity:	normal	CC:	mk.banchi
Priority:	P5
Version:	ns-3-dev
Hardware:	All
OS:	All

Description Josh Pelkey 2010-02-13 14:57:21 UTC

Try export 'NS_LOG=*=function|prefix_func|prefix_time'. Then try to run  examples/wireless/wifi-simple-adhoc.  I am getting an assert.  I tried this on a few other examples outside of the wireless directory, and it seemed to run fine.  I also tried other logging levels on the wireless examples (info, debug, warn) but these ran fine.

Comment 1 Josh Pelkey 2010-02-18 14:07:51 UTC

I've tracked this down to a recent change in dca-txop.cc, http://code.nsnam.org/ns-3-dev/diff/dba5c9b69c3b/src/devices/wifi/dca-txop.cc

Specifically, the issue is with #define NS_LOG_APPEND_CONTEXT std::clog << "[mac=" << m_low->GetAddress () << "] ";  That m_low looks to be null at some point and is causing a seg. fault.  I'm not 100% sure what is trying to be accomplished, so I can't really make a patch.  I've CC'd the author of the change though, so that hopefully this bug can be resolved.

Comment 2 Mirko Banchi 2010-02-18 14:26:00 UTC

Thank you very much Josh!I'll try to fix it very soon.

Comment 3 Mirko Banchi 2010-02-18 14:43:10 UTC

I have made a new changeset for this bug in ns-3-dev. Now all should run fine. Let me know Josh. Thank you again.