gdb.md

GDB commands

General

• Start GDB

    gdb [program]

• Running

    run [args]

• Kill the running;

    kill

Breakpoints

• Set a breakpoint

    break [where (e.g., function, line)]

• Remove a breakpoint

    delete [breakpoint#]

• Remove all breakpoints

    clear

• Enable a disabled breakpoint

    enable [breakpoint#]

• Disable a breakpoint

    disable [breakpoint#]

Examining the stack

• Show call stack

    backtrace

• Show current line

    frame

Stepping

• Go to the next instruction, but don't dive into functions

    next

• Go to the next instruction, diving into function

    step

• Continue norma execution

    continue

• Continue until the current function returns

    finish

Variables and memory

• Print content of variable/memory location/register

    print [something (e.g., variable)]

Threads

• Chose thread to operate on

    thread [thread#]

Manipulating the program

• Change the content of a variable to the given value

    set var [variable_name]=[value]

• Force the current function to return immdiately, passing the given value

    return [expression]

Sources

• Shows the current or given source context

    list
    list [filename]:[function]
    list [filename]:[line number]
    list [first line],[last line]

Informations

• Print arguments to the function of the current stack frame

    info args

• Print informations about the breakpoints

    info breakpoints

• Print the local variables in the currently selected stack frame

    info locals

• List loaded shared libraries

    info sharedlibrary

• List all threads

    info threads

• Print type of named variable

    whatis [variable_name]