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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.