GNU debugger.

Tested on 7.7.1 unless mentioned otherwise.

1. Getting started
2. Introduction
3. Invocation
4. Commands
   1. layout
5. Examples
   1. run
   2. nested.c
   3. count_infinite.c
   4. big_function.c
   5. String
   6. Array
   7. Segmentation Fault
   8. Multifile
   9. define
   10. stderr ignore
   11. call
   12. sleep
   13. maybe_crash
   14. maybe_sleep_forever
   15. C++ features
       1. Containers
       2. Overload
       3. Method
       4. Polymorphism
   16. Threads
6. gdbserver
7. GDB scripts
   1. step_all
   2. si_all
8. Python interface
   1. Multiple Python invocations
   2. help.py
   3. hello_world.py
   4. Visible variables
      1. Globals
   5. Block, Symbol
   6. print_lines.py
   7. Value
   8. read_var()
   9. Command
   10. argv-wrapper
   11. Call graph
       1. Call graph rbreak
       2. Call graph rbreak directory
       3. Call graph return
       4. Call graph walk
       5. Call graph walk filter
   12. Continue until instruction
       1. Continue until return
   13. Break on return
   14. Disassemble minimal example
       1. disas
   15. rbreak_directory.py
   16. event
9. Internals