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% Most of the following are not required for the majority
% of cheat sheets but are needed for some symbol support.
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% Document Info
\author{fristle}
\pdfinfo{
  /Title (closed-source-debugging-with-gdb.pdf)
  /Creator (Cheatography)
  /Author (fristle)
  /Subject (Closed-source Debugging with GDB Cheat Sheet)
}

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% Header and Footer
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\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}}
    }
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\columnbreak
\begin{tabulary}{11cm}{L}
    \vspace{-2pt}\large{\bf{\textcolor{DarkBackground}{\textrm{Closed-source Debugging with GDB Cheat Sheet}}}} \\
    \normalsize{by \textcolor{DarkBackground}{fristle} via \textcolor{DarkBackground}{\uline{cheatography.com/5574/cs/1012/}}}
\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}fristle \\
  \uline{cheatography.com/fristle} \\
  \end{tabulary}
\vfill
\columnbreak
\begin{tabulary}{5.8cm}{L}
  \SetRowColor{FootBackground}
  \mymulticolumn{1}{p{5.377cm}}{\bf\textcolor{white}{Cheat Sheet}}  \\
   \vspace{-2pt}Published 2nd May, 2013.\\
   Updated 12th May, 2016.\\
   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{multicols*}{3}

\begin{tabularx}{5.377cm}{x{2.4885 cm} x{2.4885 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{5.377cm}}{\bf\textcolor{white}{GDB: Launching \{\{fa-rocket\}\}}}  \tn
% Row 0
\SetRowColor{LightBackground}
\mymulticolumn{2}{x{5.377cm}}{\{\{ac\}\}{\bf{Launching GDB}}} \tn 
% Row Count 1 (+ 1)
% Row 1
\SetRowColor{white}
\{\{bt\}\}\{\{nobreak\}\}`gdb {\emph{programfile}}` & \{\{bt\}\}Start GDB ready to launch and debug {\emph{programfile}} \tn 
% Row Count 4 (+ 3)
% Row 2
\SetRowColor{LightBackground}
`gdb -{}-args {\emph{program arg1 arg2}}` & Start GDB as above but supplying command line arguments to the target process. \tn 
% Row Count 8 (+ 4)
% Row 3
\SetRowColor{white}
`gdb -p {\emph{pid}}` & Attach GDB to a running target process. \tn 
% Row Count 10 (+ 2)
% Row 4
\SetRowColor{LightBackground}
\mymulticolumn{2}{x{5.377cm}}{\{\{ac\}\}\{\{bt\}\}{\bf{Selecting the Start of Debugging}}} \tn 
% Row Count 11 (+ 1)
% Row 5
\SetRowColor{white}
\{\{bt\}\}`{\emph{gdb\$}} start` & \{\{bt\}\}Run the debuggee and break at {\emph{main()}} (if it exists). \tn 
% Row Count 14 (+ 3)
% Row 6
\SetRowColor{LightBackground}
`{\emph{gdb\$}} attach {\emph{pid}}` & Attach GDB to a running target process. \tn 
% Row Count 16 (+ 2)
% Row 7
\SetRowColor{white}
`(gdb) attach \{\{nl\}\}-{}-waitfor {\emph{process-name}}` & (Mac OS X only) Wait for a process to launch and immediately attach to it. \tn 
% Row Count 20 (+ 4)
% Row 8
\SetRowColor{LightBackground}
\mymulticolumn{2}{x{5.377cm}}{\{\{ac\}\}\{\{bt\}\}{\bf{Adding a shim}}} \tn 
% Row Count 21 (+ 1)
% Row 9
\SetRowColor{white}
\{\{bt\}\}`{\emph{gdb\$}} set exec-wrapper env 'LD\_PRELOAD={\emph{libfoo.so}}'` & \{\{bt\}\}The dynamic library file {\emph{libfoo.so}} will be loaded into the address space of the debuggee. \tn 
% Row Count 26 (+ 5)
% Row 10
\SetRowColor{LightBackground}
\mymulticolumn{2}{x{5.377cm}}{\{\{ac\}\}\{\{bt\}\}{\bf{Logging}}} \tn 
% Row Count 27 (+ 1)
% Row 11
\SetRowColor{white}
\{\{bt\}\}`{\emph{gdb\$}} set logging file {\emph{filename}}` & \{\{bt\}\}The default logfile is gdb.txt but you can use this to change it. \tn 
% Row Count 31 (+ 4)
\end{tabularx}
\par\addvspace{1.3em}

\vfill
\columnbreak
\begin{tabularx}{5.377cm}{x{2.4885 cm} x{2.4885 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{5.377cm}}{\bf\textcolor{white}{GDB: Launching \{\{fa-rocket\}\} (cont)}}  \tn
% Row 12
\SetRowColor{LightBackground}
`{\emph{gdb\$}} set logging overwrite off` & The default is on, which overwrites the existing log file. \tn 
% Row Count 3 (+ 3)
% Row 13
\SetRowColor{white}
`{\emph{gdb\$}} set logging on` & Turns on logging. \tn 
% Row Count 5 (+ 2)
% Row 14
\SetRowColor{LightBackground}
`{\emph{gdb\$}} echo {\emph{comment\textbackslash{}n}}` & With logging on, this will add a comment to the logfile. \tn 
% Row Count 8 (+ 3)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{5.377cm}{x{1.84149 cm} x{3.13551 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{5.377cm}}{\bf\textcolor{white}{GDB: Execution \{\{fa-gears\}\}}}  \tn
% Row 0
\SetRowColor{LightBackground}
\mymulticolumn{2}{x{5.377cm}}{\{\{ac\}\}{\bf{Displaying the Call Stack}}} \tn 
% Row Count 1 (+ 1)
% Row 1
\SetRowColor{white}
\{\{bt\}\}`{\emph{gdb\$}} bt` & \{\{bt\}\}Show the list of stack frames (BackTrace). \tn 
% Row Count 3 (+ 2)
% Row 2
\SetRowColor{LightBackground}
`{\emph{gdb\$}} bt full` & Show the list of stack frames with the local variables of each. \tn 
% Row Count 6 (+ 3)
% Row 3
\SetRowColor{white}
`{\emph{gdb\$}} info frame` & Show saved stack pointer, call address, etc. for the selected stack frame. \tn 
% Row Count 9 (+ 3)
% Row 4
\SetRowColor{LightBackground}
`{\emph{gdb\$}} frame {\emph{number}}` & Select stack frame number {\emph{number}} (and crashed GDB 6.3.50 on OS X). \tn 
% Row Count 12 (+ 3)
% Row 5
\SetRowColor{white}
\mymulticolumn{2}{x{5.377cm}}{\{\{ac\}\}\{\{bt\}\}{\bf{Controlling Execution}}} \tn 
% Row Count 13 (+ 1)
% Row 6
\SetRowColor{LightBackground}
\{\{bt\}\}`si {[}{\emph{count}}{]}` & \{\{bt\}\}Step-into (one or {\emph{count}} instruction forward). \tn 
% Row Count 16 (+ 3)
% Row 7
\SetRowColor{white}
`ni {[}{\emph{count}}{]}` & Step-over (one or {\emph{count}} instruction, stepping over function calls). \tn 
% Row Count 19 (+ 3)
% Row 8
\SetRowColor{LightBackground}
`return {[}{\emph{value}}{]}` & Immediately return from the current function, optionally setting the return value. \tn 
% Row Count 23 (+ 4)
% Row 9
\SetRowColor{white}
`finish` & Stop after finishing execution of the current function. \tn 
% Row Count 26 (+ 3)
% Row 10
\SetRowColor{LightBackground}
`continue` & Any time GDB is stopped, this will continue normal execution. \tn 
% Row Count 29 (+ 3)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{5.377cm}{X}
\SetRowColor{DarkBackground}
\mymulticolumn{1}{x{5.377cm}}{\bf\textcolor{white}{GDB: Environment \{\{fa-wrench\}\}}}  \tn
% Row 0
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{5.377cm}}{`{\emph{gdb\$}} show env`} \tn 
% Row Count 1 (+ 1)
% Row 1
\SetRowColor{white}
\mymulticolumn{1}{x{5.377cm}}{\{\{ar\}\}Display the debuggee's current environment variables.} \tn 
% Row Count 3 (+ 2)
% Row 2
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{5.377cm}}{`{\emph{gdb\$}} set env {\emph{varname}}={\emph{value}}`} \tn 
% Row Count 4 (+ 1)
% Row 3
\SetRowColor{white}
\mymulticolumn{1}{x{5.377cm}}{\{\{ar\}\}Set an environment variable.} \tn 
% Row Count 5 (+ 1)
% Row 4
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{5.377cm}}{`{\emph{gdb\$}} unset env {\emph{varname}}`} \tn 
% Row Count 6 (+ 1)
% Row 5
\SetRowColor{white}
\mymulticolumn{1}{x{5.377cm}}{\{\{ar\}\}Delete an environment variable.} \tn 
% Row Count 7 (+ 1)
% Row 6
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{5.377cm}}{`{\emph{gdb\$}} show args`} \tn 
% Row Count 8 (+ 1)
% Row 7
\SetRowColor{white}
\mymulticolumn{1}{x{5.377cm}}{\{\{ar\}\}Display the command-line arguments of the debuggee process.} \tn 
% Row Count 10 (+ 2)
% Row 8
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{5.377cm}}{`{\emph{gdb\$}} set args {\emph{arg1}} {\emph{arg2}}`} \tn 
% Row Count 11 (+ 1)
% Row 9
\SetRowColor{white}
\mymulticolumn{1}{x{5.377cm}}{\{\{ar\}\}Set the command-line arguments to the debuggee process.} \tn 
% Row Count 13 (+ 2)
% Row 10
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{5.377cm}}{`{\emph{gdb\$}} shell {\emph{command}}`} \tn 
% Row Count 14 (+ 1)
% Row 11
\SetRowColor{white}
\mymulticolumn{1}{x{5.377cm}}{\{\{ar\}\}Run shell commands (useful commands may include "ps -e", etc.)} \tn 
% Row Count 16 (+ 2)
% Row 12
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{5.377cm}}{`{\emph{gdb\$}} pwd | cd`} \tn 
% Row Count 17 (+ 1)
% Row 13
\SetRowColor{white}
\mymulticolumn{1}{x{5.377cm}}{\{\{ar\}\}These two commands can can show or change the working directory of GDB (useful for logging, etc.).} \tn 
% Row Count 20 (+ 3)
\hhline{>{\arrayrulecolor{DarkBackground}}-}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{5.377cm}{X}
\SetRowColor{DarkBackground}
\mymulticolumn{1}{x{5.377cm}}{\bf\textcolor{white}{GDB: Breakpoints \{\{fa-bullseye\}\}}}  \tn
% Row 0
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{5.377cm}}{\{\{ac\}\}{\bf{Managing Breakpoints}}} \tn 
% Row Count 1 (+ 1)
% Row 1
\SetRowColor{white}
\mymulticolumn{1}{x{5.377cm}}{\{\{bt\}\}`{\emph{gdb\$}} set breakpoint pending on`} \tn 
% Row Count 2 (+ 1)
% Row 2
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{5.377cm}}{\{\{ar\}\}Bypasses the warning about breakpoints in modules that aren't loaded yet.} \tn 
% Row Count 4 (+ 2)
% Row 3
\SetRowColor{white}
\mymulticolumn{1}{x{5.377cm}}{`{\emph{gdb\$}} break {\emph{function}}`} \tn 
% Row Count 5 (+ 1)
% Row 4
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{5.377cm}}{\{\{ar\}\}Sets a breakpoint at {\emph{function}} {\bf{{\emph{if}}}} ("pending" off) or {\bf{{\emph{when}}}} ("pending on") a symbol by that name exists.} \tn 
% Row Count 8 (+ 3)
% Row 5
\SetRowColor{white}
\mymulticolumn{1}{x{5.377cm}}{`{\emph{gdb\$}} break *0x00001234`} \tn 
% Row Count 9 (+ 1)
% Row 6
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{5.377cm}}{\{\{ar\}\}Sets a breakpoint at address 0x00001234.} \tn 
% Row Count 10 (+ 1)
% Row 7
\SetRowColor{white}
\mymulticolumn{1}{x{5.377cm}}{`{\emph{gdb\$}} break {\emph{0x00001234 if }}symbol{\emph{==}}somevalue*`} \tn 
% Row Count 12 (+ 2)
% Row 8
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{5.377cm}}{\{\{ar\}\}This is an example of the conditional breakpoint syntax.} \tn 
% Row Count 14 (+ 2)
% Row 9
\SetRowColor{white}
\mymulticolumn{1}{x{5.377cm}}{`{\emph{gdb\$}} catch syscall {\emph{name}}`} \tn 
% Row Count 15 (+ 1)
% Row 10
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{5.377cm}}{\{\{ar\}\}Stop when the syscall {\emph{name}} is called. Omit {\emph{name}} to stop on every syscall. Instead of name, you can also specify a syscall by number.} \tn 
% Row Count 18 (+ 3)
% Row 11
\SetRowColor{white}
\mymulticolumn{1}{x{5.377cm}}{`{\emph{gdb\$}} catch load`} \tn 
% Row Count 19 (+ 1)
% Row 12
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{5.377cm}}{\{\{ar\}\}(not in Mac OS X) Stop when the debuggee loads any dynamic library. Also: catch unload.} \tn 
% Row Count 21 (+ 2)
% Row 13
\SetRowColor{white}
\mymulticolumn{1}{x{5.377cm}}{`{\emph{gdb\$}} info break`} \tn 
% Row Count 22 (+ 1)
% Row 14
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{5.377cm}}{\{\{ar\}\}List all breakpoints and watchpoints.} \tn 
% Row Count 23 (+ 1)
% Row 15
\SetRowColor{white}
\mymulticolumn{1}{x{5.377cm}}{`{\emph{gdb\$}} clear {[}{\emph{breakpointid}}{]}`} \tn 
% Row Count 24 (+ 1)
% Row 16
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{5.377cm}}{\{\{ar\}\}Deletes one or all existing breakpoints. Without this cheat sheet, the user would be forced to guess what is being cleared.} \tn 
% Row Count 27 (+ 3)
% Row 17
\SetRowColor{white}
\mymulticolumn{1}{x{5.377cm}}{`{\emph{gdb\$}} disable {[}{\emph{breakpointid}}{]}`} \tn 
% Row Count 28 (+ 1)
% Row 18
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{5.377cm}}{\{\{ar\}\}Disables one or all breakpoints.} \tn 
% Row Count 29 (+ 1)
% Row 19
\SetRowColor{white}
\mymulticolumn{1}{x{5.377cm}}{} \tn 
% Row Count 29 (+ 0)
% Row 20
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{5.377cm}}{\{\{ac\}\}\{\{bt\}\}{\bf{Managing Watchpoints (Data Breakpoints)}}} \tn 
% Row Count 31 (+ 2)
\end{tabularx}
\par\addvspace{1.3em}

\vfill
\columnbreak
\begin{tabularx}{5.377cm}{X}
\SetRowColor{DarkBackground}
\mymulticolumn{1}{x{5.377cm}}{\bf\textcolor{white}{GDB: Breakpoints \{\{fa-bullseye\}\} (cont)}}  \tn
% Row 21
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{5.377cm}}{\{\{bt\}\}`{\emph{gdb\$}} watch *0x12345678 {[}mask 0xffffff00{]}`} \tn 
% Row Count 1 (+ 1)
% Row 22
\SetRowColor{white}
\mymulticolumn{1}{x{5.377cm}}{\{\{ar\}\}Break on any {\bf{change}} to the 24 most significant bits of a 32-bit value at address 0x12345678.} \tn 
% Row Count 4 (+ 3)
% Row 23
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{5.377cm}}{`{\emph{gdb\$}} awatch *0x12345678`} \tn 
% Row Count 5 (+ 1)
% Row 24
\SetRowColor{white}
\mymulticolumn{1}{x{5.377cm}}{\{\{ar\}\}Like watch, but also stops on {\bf{any}} write or read accesses to the given address.} \tn 
% Row Count 7 (+ 2)
% Row 25
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{5.377cm}}{`{\emph{gdb\$}} rwatch *0x12345678`} \tn 
% Row Count 8 (+ 1)
% Row 26
\SetRowColor{white}
\mymulticolumn{1}{x{5.377cm}}{\{\{ar\}\}Like watch, but only stops on read accesses.} \tn 
% Row Count 9 (+ 1)
\hhline{>{\arrayrulecolor{DarkBackground}}-}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{5.377cm}{X}
\SetRowColor{DarkBackground}
\mymulticolumn{1}{x{5.377cm}}{\bf\textcolor{white}{GDB: Concurrency \{\{fa-navicon\}\}}}  \tn
% Row 0
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{5.377cm}}{\{\{ac\}\}\{\{bt\}\}{\bf{Multithreaded Debugging}}} \tn 
% Row Count 1 (+ 1)
% Row 1
\SetRowColor{white}
\mymulticolumn{1}{x{5.377cm}}{\{\{bt\}\}`{\emph{gdb\$}} info threads`} \tn 
% Row Count 2 (+ 1)
% Row 2
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{5.377cm}}{\{\{ar\}\}List the threads of the target process.} \tn 
% Row Count 3 (+ 1)
% Row 3
\SetRowColor{white}
\mymulticolumn{1}{x{5.377cm}}{`{\emph{gdb\$}} thread {\emph{threadID}}`} \tn 
% Row Count 4 (+ 1)
% Row 4
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{5.377cm}}{\{\{ar\}\}Attach GDB to the thread {\emph{threadID}}.} \tn 
% Row Count 5 (+ 1)
% Row 5
\SetRowColor{white}
\mymulticolumn{1}{x{5.377cm}}{`{\emph{gdb\$}} set non-stop on`} \tn 
% Row Count 6 (+ 1)
% Row 6
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{5.377cm}}{\{\{ar\}\}Only the debugged thread is halted in GDB, the rest continue to run non-stop (unless they are blocking on the thread being debugged).} \tn 
% Row Count 9 (+ 3)
% Row 7
\SetRowColor{white}
\mymulticolumn{1}{x{5.377cm}}{\{\{nobreak\}\}`{\emph{gdb\$}} set scheduler-locking on`} \tn 
% Row Count 10 (+ 1)
% Row 8
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{5.377cm}}{\{\{ar\}\}Only the debugged thread will run when the debuggee is resumed.} \tn 
% Row Count 12 (+ 2)
% Row 9
\SetRowColor{white}
\mymulticolumn{1}{x{5.377cm}}{`{\emph{gdb\$}} set scheduler-locking step`} \tn 
% Row Count 13 (+ 1)
% Row 10
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{5.377cm}}{\{\{ar\}\}Only the debugged thread will step when being step-debugged.} \tn 
% Row Count 15 (+ 2)
% Row 11
\SetRowColor{white}
\mymulticolumn{1}{x{5.377cm}}{`{\emph{gdb\$}} show scheduler-locking`} \tn 
% Row Count 16 (+ 1)
% Row 12
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{5.377cm}}{\{\{ar\}\}Display the current setting value.} \tn 
% Row Count 17 (+ 1)
% Row 13
\SetRowColor{white}
\mymulticolumn{1}{x{5.377cm}}{} \tn 
% Row Count 17 (+ 0)
% Row 14
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{5.377cm}}{\{\{ac\}\}\{\{bt\}\}{\bf{Multiprocess Debugging}}} \tn 
% Row Count 18 (+ 1)
% Row 15
\SetRowColor{white}
\mymulticolumn{1}{x{5.377cm}}{\{\{bt\}\}`{\emph{gdb\$}} set follow-fork-mode child`} \tn 
% Row Count 19 (+ 1)
% Row 16
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{5.377cm}}{\{\{ar\}\}GDB will detach at a fork() and attach to the new process.} \tn 
% Row Count 21 (+ 2)
% Row 17
\SetRowColor{white}
\mymulticolumn{1}{x{5.377cm}}{`{\emph{gdb\$}} set follow-fork-mode parent`} \tn 
% Row Count 22 (+ 1)
% Row 18
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{5.377cm}}{\{\{ar\}\}(Default) GDB will not detach at a fork().} \tn 
% Row Count 23 (+ 1)
% Row 19
\SetRowColor{white}
\mymulticolumn{1}{x{5.377cm}}{`{\emph{gdb\$}} show follow-fork-mode`} \tn 
% Row Count 24 (+ 1)
% Row 20
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{5.377cm}}{\{\{ar\}\}Display the current setting value.} \tn 
% Row Count 25 (+ 1)
% Row 21
\SetRowColor{white}
\mymulticolumn{1}{x{5.377cm}}{`{\emph{gdb\$}} set follow-exec-mode new`} \tn 
% Row Count 26 (+ 1)
% Row 22
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{5.377cm}}{\{\{ar\}\}GDB will detach at an exec() and attach to the new process.} \tn 
% Row Count 28 (+ 2)
% Row 23
\SetRowColor{white}
\mymulticolumn{1}{x{5.377cm}}{`{\emph{gdb\$}} set follow-exec-mode same`} \tn 
% Row Count 29 (+ 1)
% Row 24
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{5.377cm}}{\{\{ar\}\}(Default) GDB will not detach at an exec().} \tn 
% Row Count 30 (+ 1)
\end{tabularx}
\par\addvspace{1.3em}

\vfill
\columnbreak
\begin{tabularx}{5.377cm}{X}
\SetRowColor{DarkBackground}
\mymulticolumn{1}{x{5.377cm}}{\bf\textcolor{white}{GDB: Concurrency \{\{fa-navicon\}\} (cont)}}  \tn
% Row 25
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{5.377cm}}{`{\emph{gdb\$}} show follow-exec-mode`} \tn 
% Row Count 1 (+ 1)
% Row 26
\SetRowColor{white}
\mymulticolumn{1}{x{5.377cm}}{\{\{ar\}\}Display the current setting value.} \tn 
% Row Count 2 (+ 1)
% Row 27
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{5.377cm}}{`{\emph{gdb\$}} set detach-on-fork off`} \tn 
% Row Count 3 (+ 1)
% Row 28
\SetRowColor{white}
\mymulticolumn{1}{x{5.377cm}}{\{\{ar\}\}GDB will not detach at a fork() and will {\bf{also}} attach to the child process (both will be debugged).} \tn 
% Row Count 6 (+ 3)
% Row 29
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{5.377cm}}{`{\emph{gdb\$}} show detach-on-fork`} \tn 
% Row Count 7 (+ 1)
% Row 30
\SetRowColor{white}
\mymulticolumn{1}{x{5.377cm}}{\{\{ar\}\}Display the current setting value.} \tn 
% Row Count 8 (+ 1)
% Row 31
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{5.377cm}}{`{\emph{gdb\$}} info inferiors`} \tn 
% Row Count 9 (+ 1)
% Row 32
\SetRowColor{white}
\mymulticolumn{1}{x{5.377cm}}{\{\{ar\}\}List all processes under GDB's control. (On Mac OS X: `info files`)} \tn 
% Row Count 11 (+ 2)
\hhline{>{\arrayrulecolor{DarkBackground}}-}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{5.377cm}{X}
\SetRowColor{DarkBackground}
\mymulticolumn{1}{x{5.377cm}}{\bf\textcolor{white}{GDB: Memory \{\{fa-search\}\}}}  \tn
% Row 0
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{5.377cm}}{\{\{ac\}\}{\bf{Memory Images}}} \tn 
% Row Count 1 (+ 1)
% Row 1
\SetRowColor{white}
\mymulticolumn{1}{x{5.377cm}}{\{\{bt\}\}`gdb {\emph{program}} -c {\emph{dumpfile}}`} \tn 
% Row Count 2 (+ 1)
% Row 2
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{5.377cm}}{\{\{ar\}\}Debug {\emph{program}} using a memory dump file, {\emph{imagefile}}.} \tn 
% Row Count 4 (+ 2)
% Row 3
\SetRowColor{white}
\mymulticolumn{1}{x{5.377cm}}{\{\{nobreak\}\}`{\emph{gdb\$}} generate-core-file`} \tn 
% Row Count 5 (+ 1)
% Row 4
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{5.377cm}}{\{\{ar\}\}(not in Mac OS X) Dump the debuggee process memory to disk.} \tn 
% Row Count 7 (+ 2)
% Row 5
\SetRowColor{white}
\mymulticolumn{1}{x{5.377cm}}{\{\{ac\}\}\{\{bt\}\}{\bf{Reading Disassembly and Memory}}} \tn 
% Row Count 8 (+ 1)
% Row 6
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{5.377cm}}{\{\{bt\}\}`{\emph{gdb\$}} set disassembly-flavor intel`} \tn 
% Row Count 9 (+ 1)
% Row 7
\SetRowColor{white}
\mymulticolumn{1}{x{5.377cm}}{\{\{ar\}\}Use the modern syntax for x86-64 assembly. This is not the default.} \tn 
% Row Count 11 (+ 2)
% Row 8
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{5.377cm}}{`{\emph{gdb\$}} set disassemble-next-line on`} \tn 
% Row Count 12 (+ 1)
% Row 9
\SetRowColor{white}
\mymulticolumn{1}{x{5.377cm}}{\{\{ar\}\}Disassemble the next instruction every time GDB stops. You want to turn this on.} \tn 
% Row Count 14 (+ 2)
% Row 10
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{5.377cm}}{`{\emph{gdb\$}} x/4i 0x00001234`} \tn 
% Row Count 15 (+ 1)
% Row 11
\SetRowColor{white}
\mymulticolumn{1}{x{5.377cm}}{\{\{ar\}\}Disassemble (eXamine) the first 4 instructions at address 0x00001234.} \tn 
% Row Count 17 (+ 2)
% Row 12
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{5.377cm}}{`{\emph{gdb\$}} x/32i \$rip`} \tn 
% Row Count 18 (+ 1)
% Row 13
\SetRowColor{white}
\mymulticolumn{1}{x{5.377cm}}{\{\{ar\}\}Disassemble the first 32 instructions starting at the current instruction (\$RIP on x86-64).} \tn 
% Row Count 20 (+ 2)
% Row 14
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{5.377cm}}{`{\emph{gdb\$}} x/32i \$rip-16`} \tn 
% Row Count 21 (+ 1)
% Row 15
\SetRowColor{white}
\mymulticolumn{1}{x{5.377cm}}{\{\{ar\}\}Same command, but attempting to disassemble both forward and backward from the current instruction.} \tn 
% Row Count 24 (+ 3)
% Row 16
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{5.377cm}}{`{\emph{gdb\$}} info address {\emph{symbolname}}`} \tn 
% Row Count 25 (+ 1)
% Row 17
\SetRowColor{white}
\mymulticolumn{1}{x{5.377cm}}{\{\{ar\}\}Display the address in memory of a given symbol, specified by name.} \tn 
% Row Count 27 (+ 2)
% Row 18
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{5.377cm}}{`{\emph{gdb\$}} info symbol 0x00001234`} \tn 
% Row Count 28 (+ 1)
% Row 19
\SetRowColor{white}
\mymulticolumn{1}{x{5.377cm}}{\{\{ar\}\}Displays the symbol name (if any), executable segment, and executable module associated with the given address.} \tn 
% Row Count 31 (+ 3)
\end{tabularx}
\par\addvspace{1.3em}

\vfill
\columnbreak
\begin{tabularx}{5.377cm}{X}
\SetRowColor{DarkBackground}
\mymulticolumn{1}{x{5.377cm}}{\bf\textcolor{white}{GDB: Memory \{\{fa-search\}\} (cont)}}  \tn
% Row 20
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{5.377cm}}{`{\emph{gdb\$}} x/1s 0x00001234`} \tn 
% Row Count 1 (+ 1)
% Row 21
\SetRowColor{white}
\mymulticolumn{1}{x{5.377cm}}{\{\{ar\}\}Display one null-terminated string at address 0x00001234.} \tn 
% Row Count 3 (+ 2)
% Row 22
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{5.377cm}}{`{\emph{gdb\$}} x/8xb 0x00001234`} \tn 
% Row Count 4 (+ 1)
% Row 23
\SetRowColor{white}
\mymulticolumn{1}{x{5.377cm}}{\{\{ar\}\}Display 8 heXadecimal Bytes of memory starting at address 0x00001234.} \tn 
% Row Count 6 (+ 2)
% Row 24
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{5.377cm}}{`{\emph{gdb\$}} info registers`} \tn 
% Row Count 7 (+ 1)
% Row 25
\SetRowColor{white}
\mymulticolumn{1}{x{5.377cm}}{\{\{ar\}\}Display the value of the regular CPU registers.} \tn 
% Row Count 9 (+ 2)
% Row 26
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{5.377cm}}{`{\emph{gdb\$}} info all-registers`} \tn 
% Row Count 10 (+ 1)
% Row 27
\SetRowColor{white}
\mymulticolumn{1}{x{5.377cm}}{\{\{ar\}\}Display the value of all CPU registers including floating-point and vector registers. Does not include special Machine Specific Registers (MSRs).} \tn 
% Row Count 14 (+ 4)
% Row 28
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{5.377cm}}{`{\emph{gdb\$}} find {\emph{start\_address}}, {\emph{distance}}, {\emph{value}} {[}, {\emph{another\_value}}, ...{]}`} \tn 
% Row Count 16 (+ 2)
% Row 29
\SetRowColor{white}
\mymulticolumn{1}{x{5.377cm}}{\{\{ar\}\}(not in Mac OS X) Search memory for a value, given a starting point and a search distance/offset.} \tn 
% Row Count 19 (+ 3)
% Row 30
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{5.377cm}}{`{\emph{gdb\$}} info shared`} \tn 
% Row Count 20 (+ 1)
% Row 31
\SetRowColor{white}
\mymulticolumn{1}{x{5.377cm}}{\{\{ar\}\}Display info about all of the executable modules of the debuggee (name, load address, file path, etc.).} \tn 
% Row Count 23 (+ 3)
% Row 32
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{5.377cm}}{`{\emph{gdb\$}} info functions`} \tn 
% Row Count 24 (+ 1)
% Row 33
\SetRowColor{white}
\mymulticolumn{1}{x{5.377cm}}{\{\{ar\}\}Display all of the function symbols available and their associated addresses.} \tn 
% Row Count 26 (+ 2)
% Row 34
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{5.377cm}}{`{\emph{gdb\$}} info variables`} \tn 
% Row Count 27 (+ 1)
% Row 35
\SetRowColor{white}
\mymulticolumn{1}{x{5.377cm}}{\{\{ar\}\}Display all of the variable symbols available and their associated addresses.} \tn 
% Row Count 29 (+ 2)
\hhline{>{\arrayrulecolor{DarkBackground}}-}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{5.377cm}{X}
\SetRowColor{DarkBackground}
\mymulticolumn{1}{x{5.377cm}}{\bf\textcolor{white}{GDB: Advanced \{\{fa-graduation-cap\}\}}}  \tn
% Row 0
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{5.377cm}}{\{\{ac\}\}{\bf{Anti-Anti Debugging}}} \tn 
% Row Count 1 (+ 1)
% Row 1
\SetRowColor{white}
\mymulticolumn{1}{x{5.377cm}}{\{\{bt\}\}`{\emph{gdb\$}} handle {\emph{signal}} {\emph{{[}keywords...{]}}}`} \tn 
% Row Count 2 (+ 1)
% Row 2
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{5.377cm}}{\{\{ar\}\} (Untested) might bypass exception-based anti-debugging} \tn 
% Row Count 4 (+ 2)
% Row 3
\SetRowColor{white}
\mymulticolumn{1}{x{5.377cm}}{`{\emph{gdb\$}} catch syscall ptrace`} \tn 
% Row Count 5 (+ 1)
% Row 4
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{5.377cm}}{\{\{ar\}\} (Untested) Use this breakpoint to return 0 (set \$rax = 0; continue), should bypass ptrace() checking by the debuggee.} \tn 
% Row Count 8 (+ 3)
\hhline{>{\arrayrulecolor{DarkBackground}}-}
\end{tabularx}
\par\addvspace{1.3em}


% That's all folks
\end{multicols*}

\end{document}