Debugging with GDB Manual HP WDB v6.3 (5900-2180, August 2012)

The output ends with:
^Z^Zbreakpoints-table-end
20.9 Invalidation notices
The following annotations say that certain pieces of state may have changed:
^Z^Zframes-invalid The frames (for example, output from the backtrace command)
may have changed.
^Z^Zbreakpoints-invalid The breakpoints may have changed. For example, the user
just added or deleted a breakpoint.
20.10 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.
20.11 Displaying source
The following annotation is used instead of displaying source code:
^Z^Zsource filename:line:character:middle:addr
where filename is an absolute file name indicating which source file, line is the line number
within that file (where 1 is the first line in the file), character is the character position within the
file (where 0 is the first character in the file, for most debug formats this will necessarily point to
the beginning of a line), middle is `middle' if addr is in the middle of the line, or `beg' if addr
is at the beginning of the line, and addr is the address in the target program associated with the
240 GDB Annotations