You can always ask GDB itself for information on its commands,
using the command help.
help
h
help (abbreviated h) with no arguments to
display a short list of named classes of commands:
(gdb) help List of classes of commands: running -- Running the program stack -- Examining the stack data -- Examining data breakpoints -- Making program stop at certain points files -- Specifying and examining files status -- Status inquiries support -- Support facilities user-defined -- User-defined commands aliases -- Aliases of other commands obscure -- Obscure features Type "help" followed by a class name for a list of commands in that class. Type "help" followed by command name for full documentation. Command name abbreviations are allowed if unambiguous. (gdb)
help class
status:
(gdb) help status Status inquiries. List of commands: show -- Generic command for showing things set with "set" info -- Generic command for printing status Type "help" followed by command name for full documentation. Command name abbreviations are allowed if unambiguous. (gdb)
help command
help argument, GDB displays a
short paragraph on how to use that command.
complete args
complete args command lists all the possible completions
for the beginning of a command. Use args to specify the beginning of the
command you want completed. For example:
complete iresults in:
info inspect ignoreThis is intended for use by GNU Emacs.
In addition to help, you can use the GDB commands info
and show to inquire about the state of your program, or the state
of GDB itself. Each command supports many topics of inquiry; this
manual introduces each of them in the appropriate context. The listings
under info and under show in the Index point to
all the sub-commands. See section Index.
info
i) is for describing the state of your
program. For example, you can list the arguments given to your program
with info args, list the registers currently in use with info
registers, or list the breakpoints you have set with info breakpoints.
You can get a complete list of the info sub-commands with
help info.
set
set. For example, you can set the GDB prompt to a $-sign with
set prompt $.
show
info, show is for describing the state of
GDB itself.
You can change most of the things you can show, by using the
related command set; for example, you can control what number
system is used for displays with set radix, or simply inquire
which is currently in use with show radix.
To display all the settable parameters and their current
values, you can use show with no arguments; you may also use
info set. Both commands produce the same display.
Here are three miscellaneous show subcommands, all of which are
exceptional in lacking corresponding set commands:
show version
show copying
show warranty
Go to the first, previous, next, last section, table of contents.