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## 12 Running the Program

When the program starts executing due to a gdb command such as `step` or `continue`,

         ^Z^Zstarting

is output. When the program stops,

         ^Z^Zstopped

is output. Before the `stopped` annotation, a variety of annotations describe how the program stopped.

`^Z^Zexited` exit-status
  The program exited, and exit-status is the exit status (zero for successful exit, otherwise nonzero).

`^Z^Zsignalled`
  The program exited with a signal. After the `^Z^Zsignalled`, the annotation continues:

                intro-text
                ^Z^Zsignal-name
                name
                ^Z^Zsignal-name-end
                middle-text
                ^Z^Zsignal-string
                string
                ^Z^Zsignal-string-end
                end-text

  where name is the name of the signal, such as `SIGILL` or `SIGSEGV`, and string is the explanation of the signal, such as `Illegal Instruction` or `Segmentation fault`. intro-text, middle-text, and end-text are for the user's benefit and have no particular format.

`^Z^Zsignal`
  The syntax of this annotation is just like `signalled`, but gdb is just saying that the program received the signal, not that it was terminated with it.

`^Z^Zbreakpoint` number
  The program hit breakpoint number number.

`^Z^Zwatchpoint` number
  The program hit watchpoint number number.