Question

I need to debug a C++ application (compiled with g++-4.5) with gdb on interactive console. I know very little about it, except the start, list and bt commands. I’m not asking for a tutorial about it, as I’ve found plenty with my old friend google. I just need a little bit help with something I cannot find in the help or references.

The C++ application is a UnitTest++ runner, that links several shared libraries. All these libraries have been built with the appropiate flags for debug information (-ggdb -O0) and I just need a way to set a breakpoint at a certain source file of one of the shared libraries. I’m not sure how I am supposed to navigate to that listing and set the breakpoints

Any gdb guru still out there wanting to lend a hand?

Answer 1

To set breakpoint use break command in gdb. You can use the alias b also.

Example if you want to break at line 61 in file.cpp

(gdb) b file.cpp:61

OR

(gdb) b "file.cpp":61

If you want to break at a method in a class, type the class name at the gdb prompt and press tab, it will show you all the methods in the class, you can then set breakpoint like this.

Example a method display() in class Foo

(gdb) b Foo::display()

If you want a more interacive/GUI mode then use Data Display Debugger(DDD) or go for Eclipse CDT

To see the status of shared libraries loaded, use info shared