Android NDK Debugging

The Android NDK documentation doesn't seem all that clear to me as to what sequence of commands you run to get debugging information into, and out of the ndk-gdb executable which is provided. If there is a format for what lines to break on, and in what file, is there a specification somewhere? If so, also, how do you give this debugger that information, and through what means? I'm clueless in every way as to how this process works.

Thanks