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28.6 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.