2009 Mar 01
GDB is a debugger. The purpose of a debugger to see what is going on inside another program while it executes, or at the moment it crashed. GDB can:
GDB is free software protected by the GNU General Public License (GPL). GPL gives you the freedom to copy or modify a licensed program and the freedom to distribute further copies.
Supported Languages include: C, C++, Fortran, Java, Modula-2, Assembler.
Note: gdb looks for 2nd param in following order: core, pid.
|F i l e s|
|-command||-x file||Execute gdb commands from file|
|-core||-c file||Read core from file|
|-directory||-d directory||Add directory to path to search for source files|
|-exec||-e file||Read executable from file|
|-mapped||-m||Warning not supported on all systems.
If memory mapped files are available on the system
through the mmap system call, this option will
cause the symbols to be written to a reusable file
named program.sysm. Future gdb sessions
notice this file and read it. This file is host dependent.
|-readnow||-r||Read each symbol file's entire stable now,
rather than incrementally as needed.
|-symbols||-s file||Read symbol table from file|
|-se file||Read symbol table and executable from file|
|M o d e s|
|-b bps||Set line speed (baud rate) of serial interface
used by gdb for remote debugging to bps.
|-batch||Run in batch mode. Exit with status 0 after all commans
specified with .gdbinit (provied no -n and -x.
Exit with non zeroo status if an error occurs.
|-cd directory||Use directory rather than current directory|
|-fullname||-f||Emacs sets this option to run gdb as a subprocess.
It tells gdb to output the full filename and line number
in a standard fashion each time a stack frame is displayed.
It is two \032 char followed by file name, line number, and
character position separated by colons and a newline.
|-quiet||-q||Do not print introductory and copyright messages.
They are normally suppressed in batch mode.
|-tty device||Run using device for your program's stdin and stdout.|
|O v e r a l l|
|quit||q||Exit gdb (or type EOF, usually ^d)|
|make make_args||Invoke make with specified arguments.
Same as: shell make make_args.
|shell command string||Invokes a shell to execute command string.
If it exists, the environment varaible SHELL
will specify the shell, else gdb uses sh.