HP gnu source-level debugger 5992-4701 - Manual (Page 302)

^Z^Zpre-prompt
^Z^Zprompt
^Z^Zpost-prompt
The input types are:
prompt
When GDB is prompting for a command (the main GDB
prompt).
commands When GDB prompts for a set of commands, like in the
commands command. The annotations are repeated for
each command which is input.
overload-choice When GDB wants the user to select between various
overloaded functions.
query When GDB wants the user to confirm a potentially
dangerous operation.
prompt-for-continue When GDB is asking the user to press return to continue.
Note: Don't expect this to work well; instead use set
height 0
to disable prompting. This is because the
counting of lines is buggy in the presence of annotations.
20.7 Errors
^Z^Zquit
This annotation occurs right before GDB responds to an interrupt.
^Z^Zerror
This annotation occurs right before GDB responds to an error.
Quit and error annotations indicate that any annotations which GDB was in the middle
of may end abruptly. For example, if a value-history-begin annotation is followed
by a error, one cannot expect to receive the matching value-history-end. One
cannot expect not to receive it either; however, an error annotation does not necessarily
mean that GDB is immediately returning all the way to the top level.
A quit or error annotation may be preceded by:
^Z^Zerror-begin
Any output between that and the quit or error annotation is the error message.
Warning messages are not yet annotated.
20.8 Information on breakpoints
The output from the info breakpoints command is annotated as follows:
^Z^Zbreakpoints-headers
header-entry
^Z^Zbreakpoints-table
302 GDB Annotations