\documentclass[10pt,a4paper]{article}

% Packages
\usepackage{fancyhdr}           % For header and footer
\usepackage{multicol}           % Allows multicols in tables
\usepackage{tabularx}           % Intelligent column widths
\usepackage{tabulary}           % Used in header and footer
\usepackage{hhline}             % Border under tables
\usepackage{graphicx}           % For images
\usepackage{xcolor}             % For hex colours
%\usepackage[utf8x]{inputenc}    % For unicode character support
\usepackage[T1]{fontenc}        % Without this we get weird character replacements
\usepackage{colortbl}           % For coloured tables
\usepackage{setspace}           % For line height
\usepackage{lastpage}           % Needed for total page number
\usepackage{seqsplit}           % Splits long words.
%\usepackage{opensans}          % Can't make this work so far. Shame. Would be lovely.
\usepackage[normalem]{ulem}     % For underlining links
% Most of the following are not required for the majority
% of cheat sheets but are needed for some symbol support.
\usepackage{amsmath}            % Symbols
\usepackage{MnSymbol}           % Symbols
\usepackage{wasysym}            % Symbols
%\usepackage[english,german,french,spanish,italian]{babel}              % Languages

% Document Info
\author{MeLikeyCode}
\pdfinfo{
  /Title (best-gdb.pdf)
  /Creator (Cheatography)
  /Author (MeLikeyCode)
  /Subject (Best GDB Cheat Sheet)
}

% Lengths and widths
\addtolength{\textwidth}{6cm}
\addtolength{\textheight}{-1cm}
\addtolength{\hoffset}{-3cm}
\addtolength{\voffset}{-2cm}
\setlength{\tabcolsep}{0.2cm} % Space between columns
\setlength{\headsep}{-12pt} % Reduce space between header and content
\setlength{\headheight}{85pt} % If less, LaTeX automatically increases it
\renewcommand{\footrulewidth}{0pt} % Remove footer line
\renewcommand{\headrulewidth}{0pt} % Remove header line
\renewcommand{\seqinsert}{\ifmmode\allowbreak\else\-\fi} % Hyphens in seqsplit
% This two commands together give roughly
% the right line height in the tables
\renewcommand{\arraystretch}{1.3}
\onehalfspacing

% Commands
\newcommand{\SetRowColor}[1]{\noalign{\gdef\RowColorName{#1}}\rowcolor{\RowColorName}} % Shortcut for row colour
\newcommand{\mymulticolumn}[3]{\multicolumn{#1}{>{\columncolor{\RowColorName}}#2}{#3}} % For coloured multi-cols
\newcolumntype{x}[1]{>{\raggedright}p{#1}} % New column types for ragged-right paragraph columns
\newcommand{\tn}{\tabularnewline} % Required as custom column type in use

% Font and Colours
\definecolor{HeadBackground}{HTML}{333333}
\definecolor{FootBackground}{HTML}{666666}
\definecolor{TextColor}{HTML}{333333}
\definecolor{DarkBackground}{HTML}{506636}
\definecolor{LightBackground}{HTML}{F4F5F2}
\renewcommand{\familydefault}{\sfdefault}
\color{TextColor}

% Header and Footer
\pagestyle{fancy}
\fancyhead{} % Set header to blank
\fancyfoot{} % Set footer to blank
\fancyhead[L]{
\noindent
\begin{multicols}{3}
\begin{tabulary}{5.8cm}{C}
    \SetRowColor{DarkBackground}
    \vspace{-7pt}
    {\parbox{\dimexpr\textwidth-2\fboxsep\relax}{\noindent
        \hspace*{-6pt}\includegraphics[width=5.8cm]{/web/www.cheatography.com/public/images/cheatography_logo.pdf}}
    }
\end{tabulary}
\columnbreak
\begin{tabulary}{11cm}{L}
    \vspace{-2pt}\large{\bf{\textcolor{DarkBackground}{\textrm{Best GDB Cheat Sheet}}}} \\
    \normalsize{by \textcolor{DarkBackground}{MeLikeyCode} via \textcolor{DarkBackground}{\uline{cheatography.com/121889/cs/22457/}}}
\end{tabulary}
\end{multicols}}

\fancyfoot[L]{ \footnotesize
\noindent
\begin{multicols}{3}
\begin{tabulary}{5.8cm}{LL}
  \SetRowColor{FootBackground}
  \mymulticolumn{2}{p{5.377cm}}{\bf\textcolor{white}{Cheatographer}}  \\
  \vspace{-2pt}MeLikeyCode \\
  \uline{cheatography.com/melikeycode} \\
  \end{tabulary}
\vfill
\columnbreak
\begin{tabulary}{5.8cm}{L}
  \SetRowColor{FootBackground}
  \mymulticolumn{1}{p{5.377cm}}{\bf\textcolor{white}{Cheat Sheet}}  \\
   \vspace{-2pt}Not Yet Published.\\
   Updated 20th April, 2020.\\
   Page {\thepage} of \pageref{LastPage}.
\end{tabulary}
\vfill
\columnbreak
\begin{tabulary}{5.8cm}{L}
  \SetRowColor{FootBackground}
  \mymulticolumn{1}{p{5.377cm}}{\bf\textcolor{white}{Sponsor}}  \\
  \SetRowColor{white}
  \vspace{-5pt}
  %\includegraphics[width=48px,height=48px]{dave.jpeg}
  Measure your website readability!\\
  www.readability-score.com
\end{tabulary}
\end{multicols}}




\begin{document}
\raggedright
\raggedcolumns

% Set font size to small. Switch to any value
% from this page to resize cheat sheet text:
% www.emerson.emory.edu/services/latex/latex_169.html
\footnotesize % Small font.


\begin{tabularx}{17.67cm}{x{8.635 cm} x{8.635 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{17.67cm}}{\bf\textcolor{white}{Launching}}  \tn
% Row 0
\SetRowColor{LightBackground}
gdb -p \textless{}pid\textgreater{} & attach gdb to an existing process \tn 
% Row Count 2 (+ 2)
% Row 1
\SetRowColor{white}
gdb -{}-args \textless{}exe\_file\textgreater{} {[}arg1{]} {[}arg2{]} ... & make gdb launch an executable file, passing some arguments to the executable file \tn 
% Row Count 7 (+ 5)
% Row 2
\SetRowColor{LightBackground}
gdb -{}-batch –x \textless{}command\_file\textgreater{} -{}-args \textless{}exe\_file\textgreater{} {[}arg1{]} {[}arg2{]} … & make gdb launch an executable file (passing some arguments to it), then have gdb execute gdb commands from a "command file" \tn 
% Row Count 14 (+ 7)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{17.67cm}{x{2.9359 cm} x{14.3341 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{17.67cm}}{\bf\textcolor{white}{Execution Control}}  \tn
% Row 0
\SetRowColor{LightBackground}
\seqsplit{continue} & continue execution of the process until a breakpoint (or catchpoint) is hit \tn 
% Row Count 3 (+ 3)
% Row 1
\SetRowColor{white}
next & continue execution of the process until the next line of code \tn 
% Row Count 5 (+ 2)
% Row 2
\SetRowColor{LightBackground}
step & continue the execution of the process until the first instruction of the next function (aka "step into") \tn 
% Row Count 9 (+ 4)
% Row 3
\SetRowColor{white}
\seqsplit{finish} & continue execution of the process until the current function returns \tn 
% Row Count 12 (+ 3)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\SetRowColor{LightBackground}
\mymulticolumn{2}{x{17.67cm}}{"Ctr + c" (while the gdb terminal window is focused) to break the process right where it is at.}  \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{17.67cm}{x{6.0445 cm} x{11.2255 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{17.67cm}}{\bf\textcolor{white}{Viewing Source}}  \tn
% Row 0
\SetRowColor{LightBackground}
layout next & enable tui mode (top part of terminal will show source location of where you're currently broken) \tn 
% Row Count 4 (+ 4)
% Row 1
\SetRowColor{white}
tui disable & disable tui mode \tn 
% Row Count 5 (+ 1)
% Row 2
\SetRowColor{LightBackground}
list & print next 10 lines of code \tn 
% Row Count 7 (+ 2)
% Row 3
\SetRowColor{white}
list - & print previous 10 lines of code \tn 
% Row Count 9 (+ 2)
% Row 4
\SetRowColor{LightBackground}
list \textless{}file\textgreater{}:\textless{}function\textgreater{} & print 10 lines of code around a specific function in a file \tn 
% Row Count 12 (+ 3)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{17.67cm}{x{5.8718 cm} x{11.3982 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{17.67cm}}{\bf\textcolor{white}{Viewing Variables}}  \tn
% Row 0
\SetRowColor{LightBackground}
print \textless{}variable\_name\textgreater{} & print a variable (must be in scope of course) \tn 
% Row Count 2 (+ 2)
% Row 1
\SetRowColor{white}
backtrace & print callstack \tn 
% Row Count 3 (+ 1)
% Row 2
\SetRowColor{LightBackground}
backtrace -n & print top n frames of callstack (n can be any number) \tn 
% Row Count 6 (+ 3)
% Row 3
\SetRowColor{white}
frame n & select frame number n (nth frame from the top). Frame is another word for a particular function in a callstack. \tn 
% Row Count 11 (+ 5)
% Row 4
\SetRowColor{LightBackground}
up & select the next frame up \tn 
% Row Count 12 (+ 1)
% Row 5
\SetRowColor{white}
down & select the next frame down \tn 
% Row Count 13 (+ 1)
% Row 6
\SetRowColor{LightBackground}
info args & print the arguments passed to the selected frame (function) \tn 
% Row Count 16 (+ 3)
% Row 7
\SetRowColor{white}
info locals & print the local variables defined in the selected frame \tn 
% Row Count 19 (+ 3)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{17.67cm}{x{8.635 cm} x{8.635 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{17.67cm}}{\bf\textcolor{white}{Breakpoints}}  \tn
% Row 0
\SetRowColor{LightBackground}
info breakpoints & print information about \seqsplit{breakpoints/catchpoints} that you've placed \tn 
% Row Count 4 (+ 4)
% Row 1
\SetRowColor{white}
break \textless{}function\_name\textgreater{} & place a breakpoint on a particular function. Write the full name of the function, as you would specify it in C++ (e.g. \seqsplit{ClassName::function\_name)}. If you have multiple functions with the same name, include argument types to disambiguate. \tn 
% Row Count 16 (+ 12)
% Row 2
\SetRowColor{LightBackground}
break \textless{}file\textgreater{}:\textless{}line\_number\textgreater{} & place a breakpoint on a particular line of a particular file \tn 
% Row Count 19 (+ 3)
% Row 3
\SetRowColor{white}
delete \textless{}breakpoint\_number\textgreater{} & delete (remove) a particular breakpoint. "info breakpoints" will show you the breakpoint numbers for all the breakpoints that you've placed. \tn 
% Row Count 26 (+ 7)
% Row 4
\SetRowColor{LightBackground}
disable \textless{}breakpoint\_number\textgreater{} & disable a particular breakpoint. A disabled breakpoint still shows up when you do "info breakpoints", but it won't be hit until you enable it. \tn 
% Row Count 34 (+ 8)
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{17.67cm}{x{8.635 cm} x{8.635 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{17.67cm}}{\bf\textcolor{white}{Breakpoints (cont)}}  \tn
% Row 5
\SetRowColor{LightBackground}
enable \textless{}breakpoint\_number\textgreater{} & enable a particular breakpoint \tn 
% Row Count 2 (+ 2)
% Row 6
\SetRowColor{white}
break \textless{}function\textgreater{} if \textless{}condition\textgreater{} & place a conditional breakpoint (i.e. only break if a certain condition is true). The condition is any valid C++ expression that evaluates to true or false. You can use convenience variables as well as any variables in scope for the condition. \tn 
% Row Count 15 (+ 13)
% Row 7
\SetRowColor{LightBackground}
condition \textless{}breakpoint\_number\textgreater{} {[}condition{]} & define a condition for an already placed breakpoint. If you leave out the {[}condition{]}, then you are saying to make the breakpoint unconditional (i.e. remove any existing conditions, if there are any). \tn 
% Row Count 25 (+ 10)
% Row 8
\SetRowColor{white}
commands \textless{}breakpoint\_number\textgreater{} & specify gdb commands that should automatically run whenever the breakpoint is hit. After you run this command, typing a bunch of newline seperated commands that should be executed when the breakpoint is hit. After you are done entering your commands, type "end". \tn 
% Row Count 39 (+ 14)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}



\end{document}