GNU gdb (Ubuntu 7.11.1-0ubuntu1~16.04) 7.11.1 Copyright (C) 2016 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html> This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law. Type "show copying" and "show warranty" for details. This GDB was configured as "x86_64-linux-gnu". Type "show configuration" for configuration details. For bug reporting instructions, please see: <http://www.gnu.org/software/gdb/bugs/>. Find the GDB manual and other documentation resources online at: <http://www.gnu.org/software/gdb/documentation/>. For help, type "help". Type "apropos word" to search for commands related to "word".

This is the GNU debugger. Usage: gdb [options] [executable-file [core-file or process-id]] gdb [options] --args executable-file [inferior-arguments ...] Selection of debuggee and its files: --args Arguments after executable-file are passed to inferior --core=COREFILE Analyse the core dump COREFILE. --exec=EXECFILE Use EXECFILE as the executable. --pid=PID Attach to running process PID. --directory=DIR Search for source files in DIR. --se=FILE Use FILE as symbol file and executable file. --symbols=SYMFILE Read symbols from SYMFILE. --readnow Fully read symbol files on first access. --write Set writing into executable and core files. Initial commands and command files: --command=FILE, -x Execute GDB commands from FILE. --init-command=FILE, -ix Like -x but execute commands before loading inferior. --eval-command=COMMAND, -ex Execute a single GDB command. May be used multiple times and in conjunction with --command. --init-eval-command=COMMAND, -iex Like -ex but before loading inferior. --nh Do not read ~/.gdbinit. --nx Do not read any .gdbinit files in any directory. Output and user interface control: --fullname Output information used by emacs-GDB interface. --interpreter=INTERP Select a specific interpreter / user interface --tty=TTY Use TTY for input/output by the program being debugged. -w Use the GUI interface. --nw Do not use the GUI interface. --tui Use a terminal user interface. --dbx DBX compatibility mode. -q, --quiet, --silent Do not print version number on startup. Operating modes: --batch Exit after processing options. --batch-silent Like --batch, but suppress all gdb stdout output. --return-child-result GDB exit code will be the child's exit code. --configuration Print details about GDB configuration and then exit. --help Print this message and then exit. --version Print version information and then exit. Remote debugging options: -b BAUDRATE Set serial port baud rate used for remote debugging. -l TIMEOUT Set timeout in seconds for remote debugging. Other options: --cd=DIR Change current directory to DIR. --data-directory=DIR, -D Set GDB's data-directory to DIR. At startup, GDB reads the following init files and executes their commands: * system-wide init file: /etc/gdb/gdbinit For more information, type "help" from within GDB, or consult the GDB manual (available as on-line info or a printed manual). Report bugs to "<http://www.gnu.org/software/gdb/bugs/>".