Gazebo Gazebo

Using GDB with the command line tools

The Gazebo command line tools are based on Ruby. If you want to use GDB to debug a problem, which we highly encourage, then you'll need to run GDB against the Ruby executable. Once in the GDB shell, you can run the ign gazebo script to run an instance of Gazebo.

You'll likely want to debug the Gazebo server or GUI separately. Refer to the following two sections for instructions concerning each case.

Debugging the server

1. Find the ign executable:

   which ign

   The following instructions will assume the output was /usr/bin/ign, be sure to change it accordingly.

2. Launch gdb

   ``` gdb ruby ```

3. Run the Gazebo server with the desired arguments. Make sure to use the -s argument. The following example runs the shapes.sdf world.

   ``` (gdb) r /usr/bin/ign gazebo -s shapes.sdf ```

4. Use GDB as normal

Debugging the GUI

1. Launch gdb

   ``` gdb ruby ```

2. Run the Gazebo GUI with the desired arguments. Make sure to use the -g argument.

   ``` (gdb) r /usr/bin/ign gazebo -g ```

3. In another terminal run the Gazebo server.

   ``` ign gazebo -s -v 4 -r shapes.sdf ```

4. Use GDB as normal.