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debug gdb and ROS

asked 2015-06-13 03:16:35 -0500

AbdealiJK gravatar image

updated 2015-06-13 03:21:14 -0500

I have been trying to debug my rosnode with gdb because I am getting a segmentation fault. My package name is renv and the executable inside it is names env

I can run rosrun renv env --env 1 and it works. When I do rosrun renv env --env 2 it gives me a SegFault.

I tried:

gdb --args rosrun renv env --env 2 and gdb says rosrun is not executable (makes sense as it's a shell script)

gdb --args renv env --env 2 and gdb says renv not found

gdb --args env --env 2 and gdb gets confused and trued running /usr/bin/env

I have enabled debugging symbols in CMake using


And I find a lot of answers pointing to Roslaunch nodes and gdb + valgrind ... and It's difficult for me to understand that ... I think it says to use gdb --args for the gdb part - But I don't know what to put after that :P

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answered 2015-06-13 12:36:44 -0500

ahendrix gravatar image

Use the --prefix option to rosrun:

rosrun --prefix 'gdb --args' renv env --env 2
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This makes complete sense but I never knew the --prefix option existed. Thanks !

AbdealiJK gravatar image AbdealiJK  ( 2015-06-13 12:53:43 -0500 )edit

supremely helpful

physincubus gravatar image physincubus  ( 2016-02-05 10:36:51 -0500 )edit

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Asked: 2015-06-13 03:16:35 -0500

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Last updated: Jun 13 '15