Debugger supports user defined breakpoint actions. Actions can be: sound, log entry, resume after N seconds, external 
command or gdb command. You can specify several actions. 
To do that right click on existing breakpoint in the Breakpoints view and select Properties...
In Action tab you can define new actions (at the bottom) and attach them to current breakpoint (at the top).
For example you can define a breakpoint action: when breakpoint hit, "print x" (gdb command to print variable x) and 
resume.