How can I find the line where the code crashes?

asked 2020-07-10 00:49:17 -0500

gab27
15 ●16 ●19 ●24

updated 2020-07-12 22:01:39 -0500

I only got the following error message:

[package-2] process has died [pid 14880, exit code -6, cmd /home/user/catkin_ws/devel/lib/package/package_node /package/sub_topic:=/topic __name:=package __log:=/home/user/.ros/log/74b3f964-c270-11ea-9dfa-98e743bf11b3/package-2.log].
log file: /home/user/.ros/log/74b3f964-c270-11ea-9dfa-98e743bf11b3/package-2*.log

How do I find the line of code, where the code crashed?

Edit: Is there also a way to run the executable via rosrun or roslaunch?

I don't get any errors with gdb <path to ros executable>, but the node is also not getting any input topics (for example the navigation goal I usually set in RVIZ).

Thanks

answered 2020-07-10 03:56:04 -0500

ahcorde

421 ●4 ●26 ●8

Hello,

you should compile your code to include the debug symbols. You need to run your catkin command with:

catkin_make_isolated --cmake-args -DCMAKE_BUILD_TYPE=Debug --pkg <your package>

Then you need to run your code with gdb.

gdb <path to your ros executable>

When the code fails use the command bt to see the backtrace and see what is going on in your code.

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Thanks, I try that.

gab27 ( 2020-07-12 02:09:36 -0500 )edit

Is there also a way to run the executable via rosrun or roslaunch?

I don't get any errors with gdb <path to ros executable>, but the node is also not getting any input topics (for example the navigation goal I usually set in rviz, but I could also publish it via the terminal).

gab27 ( 2020-07-12 17:14:13 -0500 )edit

That's cool. + 1 I started on ubuntu/linux just to play with ROS. No background in linux and never heard of this(GDB) until your post. Thank you.

billy ( 2020-07-13 00:44:51 -0500 )edit

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