Bug 894

Summary:	./waf --run error message upon segfault
Product:	ns-3	Reporter:	Mathieu Lacage <mathieu.lacage>
Component:	build system	Assignee:	ns-bugs <ns-bugs>
Status:	RESOLVED FIXED
Severity:	normal	CC:	gjcarneiro, jpelkey
Priority:	P5
Version:	pre-release
Hardware:	All
OS:	All
Attachments:	Patch patch

Description Mathieu Lacage 2010-04-22 05:32:48 UTC

The typical output of ./waf --run when a segfault happens is this:
Command ['/home/muhr/Documents/cplus-ns3-workspace/MIMO_MESH_204/build/
debug/scratch/MIMO_MESH/MIMO_MESH'] exited with code -11


Could we make waf print something different such as:

"Your program crashed: run it under a debugger to get more information. For example, with gdb, type \"./waf --command-template="gdb %s" --run YOURPROGRAM\""

Where YOURPROGRAM would be the argument the user specified to --run

Comment 1 Lalith Suresh 2010-04-22 23:40:31 UTC

Created attachment 845 [details]
Patch

Attaching a patch. Here's what a segmentation fault now shows up as:

nightstrike@irule:~/builds/ns3/new/ns-3-final$ ./waf --run "scratch/xyz --assocMethod1=1"
Waf: Entering directory `/home/nightstrike/builds/ns3/new/ns-3-final/build'
'/home/nightstrike/builds/ns3/new/ns-3-final/bindings/python/ns3/__init__.py' -> '/home/nightstrike/builds/ns3/new/ns-3-final/build/debug/bindings/python/ns3/__init__.py'
Waf: Leaving directory `/home/nightstrike/builds/ns3/new/ns-3-final/build'
'build' finished successfully (0.789s)
Your program crashed with exit code -11 (Segmentation fault). Run it under a debugger to get more information. For example, with gdb, type:
./waf --command-template="gdb %s" --run "scratch/xyz --assocMethod1=1"

Comment 2 Mathieu Lacage 2010-04-23 01:48:37 UTC

gustavo, ok with you ?
josh, can we push this in the release ?

Comment 3 Gustavo J. A. M. Carneiro 2010-04-23 06:52:45 UTC

Created attachment 846 [details]
patch

This version of the patch works with any signal, not just sigsegv.

Comment 4 Josh Pelkey 2010-04-23 10:51:27 UTC

(In reply to comment #3)
> Created an attachment (id=846) [details]
> patch
> 
> This version of the patch works with any signal, not just sigsegv.

+1, support this for ns-3.8.

Comment 5 Gustavo J. A. M. Carneiro 2010-04-23 10:55:46 UTC

changeset:   6275:77f833c7ddae
tag:         tip
user:        Gustavo J. A. M. Carneiro  <gjc@inescporto.pt>
date:        Fri Apr 23 15:55:15 2010 +0100
summary:     Bug 894 - ./waf --run error message upon segfault