GNU debugger (talvolta chiamato semplicemente GDB) è il nome di un programma libero sviluppato da GNU. È il debugger predefinito del software GNU, gira su molte piattaforme (tra cui i sistemi Unix-like e Microsoft Windows) ed è capace di analizzare numerosi linguaggi di programmazione, tra cui Ada, C, C++ e Fortran.
GDB (ovvero GNU DeBugger) è molto più di un semplice debugger: è un vero e proprio program execution path analysis tool.
Invocando il comando “gdb –help” avremo:
This is the GNU debugger. Usage:
gdb [options] [executable-file [core-file or process-id]]
gdb [options] --args executable-file [inferior-arguments ...]
Options:
--args Arguments after executable-file are passed to inferior
--[no]async Enable (disable) asynchronous version of CLI
-b BAUDRATE Set serial port baud rate used for remote debugging.
--batch Exit after processing options.
--cd=DIR Change current directory to DIR.
--command=FILE Execute GDB commands from FILE.
--core=COREFILE Analyze the core dump COREFILE.
--pid=PID Attach to running process PID.
--dbx DBX compatibility mode.
--directory=DIR Search for source files in DIR.
--epoch Output information used by epoch emacs-GDB interface.
--exec=EXECFILE Use EXECFILE as the executable.
--fullname Output information used by emacs-GDB interface.
--help Print this message.
--interpreter=INTERP
Select a specific interpreter / user interface
--mapped Use mapped symbol files if supported on this system.
--nw Do not use a window interface.
--nx Do not read .gdbinit file.
--quiet Do not print version number on startup.
--readnow Fully read symbol files on first access.
--se=FILE Use FILE as symbol file and executable file.
--symbols=SYMFILE Read symbols from SYMFILE.
--tty=TTY Use TTY for input/output by the program being debugged.
--version Print version information and then exit.
-w Use a window interface.
--write Set writing into executable and core files.
--xdb XDB compatibility mode.