When the program starts executing due to a gdb command such as
step or continue,
is output. When the program stops,
is output. Before the stopped annotation, a variety of
annotations describe how the program stopped.
The program exited, and exit-status is the exit status (zero for
successful exit, otherwise nonzero).
The program exited with a signal. After the ^Z^Zsignalled, the
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.
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.