|  | %%%%%%%%%%%%%%%% gdb-refcard.tex %%%%%%%%%%%%%%%% | 
|  |  | 
|  | %This file is TeX source for a reference card describing GDB, the GNU debugger. | 
|  | %Copyright (C) 1991--2024 Free Software Foundation, Inc. | 
|  | %Permission is granted to make and distribute verbatim copies of | 
|  | %this reference provided the copyright notices and permission notices | 
|  | %are preserved on all copies. | 
|  | % | 
|  | %TeX markup is a programming language; accordingly this file is source | 
|  | %for a program to generate a reference. | 
|  | % | 
|  | %This program is free software; you can redistribute it and/or modify | 
|  | %it under the terms of the GNU General Public License as published by | 
|  | %the Free Software Foundation; either version 3, or (at your option) | 
|  | %any later version. | 
|  | % | 
|  | %This program is distributed in the hope that it will be useful, but | 
|  | %WITHOUT ANY WARRANTY; without even the implied warranty of | 
|  | %MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU | 
|  | %General Public License for more details. | 
|  | % | 
|  | %You should have received a copy of the GNU General Public License | 
|  | %along with this program.  If not, see <http://www.gnu.org/licenses/>. | 
|  | % | 
|  | %You can contact the maintainer at:  doc@cygnus.com | 
|  | % | 
|  | %                                Documentation Department | 
|  | %                                Cygnus Solutions | 
|  | %                                1325 Chesapeake Terrace | 
|  | %                                Sunnyvale, CA 94089  USA | 
|  | % | 
|  | %                                +1 800 CYGNUS-1 | 
|  | % | 
|  | % | 
|  | % | 
|  | % 22-AUG-1993 Andreas Vogel | 
|  | % | 
|  | %   Modifications made in order to handle different papersizes correctly. | 
|  | %   You only have to set the total width and height of the paper, the | 
|  | %   horizontal and vertical margin space measured from *paper edge* | 
|  | %   and the interline and interspec spacing. | 
|  | %   In order to support a new papersize, you have to fiddle with the | 
|  | %   latter four dimensions. Just try out a few values. | 
|  | %   All other values will be computed at process time so it should be | 
|  | %   quite easy to support different paper sizes - only four values to | 
|  | %   guess :-) | 
|  | % | 
|  | %   To find the configuration places, just search for the string | 
|  | %   "CONFIGURATION". | 
|  | % | 
|  | %   Andreas Vogel (av@ssw.de) | 
|  | % | 
|  | % | 
|  | % | 
|  | % Uncomment the following `magnification' command if you want to print | 
|  | % out in a larger font.  Caution!  You may need larger paper.  You had | 
|  | % best avoid using 3-column output if you try this.  See the ``Three | 
|  | % column format'' section below if you want to print in three column | 
|  | % format. | 
|  | % | 
|  | %\magnification=\magstep 1 | 
|  | % | 
|  | % NOTE ON INTENTIONAL OMISSIONS: This reference card includes most GDB | 
|  | % commands, but due to space constraints there are some things I chose | 
|  | % to omit.  In general, not all synonyms for commands are covered, nor | 
|  | % all variations of a command. | 
|  | % The GDB-under-Emacs section omits gdb-mode functions without default | 
|  | % keybindings.  GDB startup options are not described. | 
|  | % set print sevenbit-strings omitted. | 
|  | % printsyms, printpsyms, omitted since they're for GDB maintenance primarily | 
|  | % share omitted due to obsolescence | 
|  | % set check range/type omitted at least til code is in GDB. | 
|  | % | 
|  | %-------------------- Three column format ----------------------- | 
|  |  | 
|  | %%%% --- To disable three column format, comment out this entire section | 
|  |  | 
|  | % Three-column format for landscape printing | 
|  |  | 
|  | %-------- Papersize defs: | 
|  |  | 
|  | \newdimen\totalwidth \newdimen\totalheight | 
|  | \newdimen\hmargin    \newdimen\vmargin | 
|  | \newdimen\secskip    \newdimen\lskip | 
|  | \newdimen\barwidth   \newdimen\barheight | 
|  | \newdimen\intersecwidth | 
|  |  | 
|  | %% | 
|  | %%  START CONFIGURATION - PAPERSIZE DEFINITIONS | 
|  | %------- Papersize params: | 
|  | %%  US letter paper (8.5x11in) | 
|  | %% | 
|  | \totalwidth=11in    % total width of paper | 
|  | \totalheight=8.5in  % total height of paper | 
|  | \hmargin=.25in      % horizontal margin width | 
|  | \vmargin=.25in      % vertical margin width | 
|  | \secskip=1pc        % space between refcard secs | 
|  | \lskip=2pt          % extra skip between \sec entries | 
|  | \ifx\pdfoutput\undefined\else   % check if we are using pdfTeX | 
|  | \pdfpagewidth=\totalwidth     % width of paper in pdf output | 
|  | \pdfpageheight=\totalheight   % height of paper in pdf output | 
|  | \fi | 
|  | %------- end papersize params | 
|  | %% | 
|  | %%  change according to personal taste, not papersize dependent | 
|  | %% | 
|  | \barwidth=.1pt       % width of the cropmark bar | 
|  | \barheight=2pt       % height of the cropmark bar | 
|  | \intersecwidth=0.5em % width between \itmwid and \dfnwid | 
|  | %% | 
|  | %%  END CONFIGURATION - PAPERSIZE DEFINITIONS | 
|  | %% | 
|  |  | 
|  | %% | 
|  | %%  values to be computed - nothing to configure | 
|  | %% | 
|  | \newdimen\fullhsize     % width of area without margins | 
|  | \newdimen\itmwid        % width of item column | 
|  | \newdimen\dfnwid        % width of definition column | 
|  | \newdimen\temp          % only for temporary use | 
|  |  | 
|  | %% | 
|  | %%  adjust the offsets so the margins are measured *from paper edge* | 
|  | %% | 
|  | \hoffset=-1in \advance \hoffset by \hmargin | 
|  | \voffset=-1in \advance \voffset by \vmargin | 
|  |  | 
|  | %% | 
|  | %%  fullhsize = totalwidth - (2 * hmargin) | 
|  | %% | 
|  | \fullhsize=\totalwidth | 
|  | \temp=\hmargin \multiply \temp by 2 \advance \fullhsize by -\temp | 
|  |  | 
|  | %% | 
|  | %%  hsize = (fullhsize - (4 * hmargin) - (2 * barwidth)) / 3 | 
|  | %% | 
|  | \hsize=\fullhsize | 
|  | \temp=\hmargin \multiply \temp by 4 \advance \hsize by -\temp | 
|  | \temp=\barwidth \multiply \temp by 2 \advance \hsize by -\temp | 
|  | \divide \hsize by 3 | 
|  |  | 
|  | %% | 
|  | %%  vsize = totalheight - (2 * vmargin) | 
|  | %% | 
|  | \vsize=\totalheight | 
|  | \temp=\vmargin \multiply \temp by 2 \advance \vsize by -\temp | 
|  |  | 
|  | %% | 
|  | %%  itmwid = (hsize - intersecwidth) * 1/3 | 
|  | %%  dfnwid = (hsize - intersecwidth) * 2/3 | 
|  | %% | 
|  | \temp=\hsize \advance \temp by -\intersecwidth \divide \temp by 3 | 
|  | \itmwid=\temp | 
|  | \dfnwid=\hsize \advance \dfnwid by -\itmwid | 
|  |  | 
|  | %-------- end papersize defs | 
|  |  | 
|  |  | 
|  | \def\fulline{\hbox to \fullhsize} | 
|  | \let\lcr=L \newbox\leftcolumn\newbox\centercolumn | 
|  | \output={\if L\lcr | 
|  | \global\setbox\leftcolumn=\columnbox \global\let\lcr=C | 
|  | \else | 
|  | \if C\lcr | 
|  | \global\setbox\centercolumn=\columnbox \global\let\lcr=R | 
|  | \else \tripleformat \global\let\lcr=L | 
|  | \fi | 
|  | \fi | 
|  | %         \ifnum\outputpenalty>-20000 \else\dosupereject\fi | 
|  | } | 
|  |  | 
|  | %% | 
|  | %%  START CONFIGURATION - ALTERNATIVE FOLDING GUIDES | 
|  | %% | 
|  | %%  For NO printed folding guide, | 
|  | %%  comment out other \def\vdecor's and uncomment: | 
|  |  | 
|  | %\def\vdecor{\hskip\hmargin plus1fil\hskip\barwidth plus1fil\hskip\hmargin plus1fil} | 
|  |  | 
|  | %%  For SOLID LINE folding guide, | 
|  | %%  comment out other \def\vdecor's and uncomment: | 
|  |  | 
|  | %\def\vdecor{\hskip\hmargin plus1fil \vrule width \barwidth \hskip\hmargin plus1fil} | 
|  |  | 
|  | %%  For SMALL MARKS NEAR TOP AND BOTTOM as folding guide, | 
|  | %%  comment out other \def\vdecor's and uncomment: | 
|  |  | 
|  | \def\vdecor{\hskip\hmargin plus1fil | 
|  | \vbox to \vsize{\hbox to \barwidth{\vrule height\barheight width\barwidth}\vfill | 
|  | \hbox to \barwidth{\vrule height\barheight width\barwidth}}%THIS PERCENT SIGN IS ESSENTIAL | 
|  | \hskip\hmargin plus1fil} | 
|  |  | 
|  | %% | 
|  | %%  END CONFIGURATION - ALTERNATIVES FOR FOLDING GUIDES | 
|  | %% | 
|  |  | 
|  | \def\tripleformat{\shipout\vbox{\fulline{\box\leftcolumn\vdecor | 
|  | \box\centercolumn\vdecor | 
|  | \columnbox} | 
|  | } | 
|  | \advancepageno} | 
|  | \def\columnbox{\leftline{\pagebody}} | 
|  | \def\bye{\par\vfill | 
|  | \supereject | 
|  | \if R\lcr \null\vfill\eject\fi | 
|  | \end} | 
|  |  | 
|  | %-------------------- end three column format ----------------------- | 
|  |  | 
|  | %-------------------- Computer Modern font defs: -------------------- | 
|  | \font\bbf=cmbx10 | 
|  | \font\vbbf=cmbx12 | 
|  | \font\smrm=cmr6 | 
|  | \font\brm=cmr10 | 
|  | \font\rm=cmr7 | 
|  | \font\it=cmti7 | 
|  | \font\tt=cmtt8 | 
|  | %-------------------- end font defs --------------------------------- | 
|  |  | 
|  | % | 
|  | \hyphenpenalty=5000\tolerance=2000\raggedright\raggedbottom | 
|  | \normalbaselineskip=9pt\baselineskip=9pt | 
|  | % | 
|  | \parindent=0pt | 
|  | \parskip=0pt | 
|  | \footline={\vbox to0pt{\hss}} | 
|  | % | 
|  | \def\ctl#1{{\tt C-#1}} | 
|  | \def\opt#1{{\brm[{\rm #1}]}} | 
|  | \def\xtra#1{\noalign{\smallskip{\tt#1}}} | 
|  | % | 
|  | \long\def\sec#1;#2\endsec{\vskip \secskip | 
|  | \halign{% | 
|  | %COL 1 (of halign): | 
|  | \vtop{\hsize=\itmwid\tt | 
|  | ##\par\vskip \lskip }\hfil | 
|  | %COL 2 (of halign): | 
|  | &\vtop{\hsize=\dfnwid\hangafter=1\hangindent=\intersecwidth | 
|  | \rm ##\par\vskip \lskip}\cr | 
|  | %Tail of \long\def fills in halign body with \sec args: | 
|  | \noalign{{\bbf #1}\vskip \lskip} | 
|  | #2 | 
|  | } | 
|  | } | 
|  |  | 
|  | {\vbbf GDB QUICK REFERENCE}\hfil{\smrm GDB Version 5}\qquad | 
|  |  | 
|  | \sec Essential Commands; | 
|  | gdb {\it program} \opt{{\it core}}&debug {\it program} \opt{using | 
|  | coredump {\it core}}\cr | 
|  | b \opt{\it file\tt:}{\it function}&set breakpoint at {\it function} \opt{in \it file}\cr | 
|  | run \opt{{\it arglist}}&start your program \opt{with {\it arglist}}\cr | 
|  | bt& backtrace: display program stack\cr | 
|  | p {\it expr}&display the value of an expression\cr | 
|  | c &continue running your program\cr | 
|  | n &next line, stepping over function calls\cr | 
|  | s &next line, stepping into function calls\cr | 
|  | \endsec | 
|  |  | 
|  | \sec Starting GDB; | 
|  | gdb&start GDB, with no debugging files\cr | 
|  | gdb {\it program}&begin debugging {\it program}\cr | 
|  | gdb {\it program core}&debug coredump {\it core} produced by {\it | 
|  | program}\cr | 
|  | gdb --help&describe command line options\cr | 
|  | \endsec | 
|  |  | 
|  | \sec Stopping GDB; | 
|  | quit&exit GDB; also {\tt q} or {\tt EOF} (eg \ctl{d})\cr | 
|  | INTERRUPT&(eg \ctl{c}) terminate current command, or send to running process\cr | 
|  | \endsec | 
|  |  | 
|  | \sec Getting Help; | 
|  | help&list classes of commands\cr | 
|  | help {\it class}&one-line descriptions for commands in {\it class}\cr | 
|  | help {\it command}&describe {\it command}\cr | 
|  | \endsec | 
|  |  | 
|  | \sec Executing your Program; | 
|  | run {\it arglist}&start your program with {\it arglist}\cr | 
|  | run&start your program with current argument list\cr | 
|  | run $\ldots$ <{\it inf} >{\it outf}&start your program with input, output | 
|  | redirected\cr | 
|  | \cr | 
|  | kill&kill running program\cr | 
|  | \cr | 
|  | tty {\it dev}&use {\it dev} as stdin and stdout for next {\tt run}\cr | 
|  | set args {\it arglist}&specify {\it arglist} for next | 
|  | {\tt run}\cr | 
|  | set args&specify empty argument list\cr | 
|  | show args&display argument list\cr | 
|  | \cr | 
|  | show env&show all environment variables\cr | 
|  | show env {\it var}&show value of environment variable {\it var}\cr | 
|  | set env {\it var} {\it string}&set environment variable {\it var}\cr | 
|  | unset env {\it var}&remove {\it var} from environment\cr | 
|  | \endsec | 
|  |  | 
|  | \sec Shell Commands; | 
|  | cd {\it dir}&change working directory to {\it dir}\cr | 
|  | pwd&Print working directory\cr | 
|  | make $\ldots$&call ``{\tt make}''\cr | 
|  | shell {\it cmd}&execute arbitrary shell command string\cr | 
|  | \endsec | 
|  |  | 
|  | \vfill | 
|  | \line{\smrm \opt{ } surround optional arguments \hfill $\ldots$ show | 
|  | one or more arguments} | 
|  | \vskip\baselineskip | 
|  | \centerline{\smrm \copyright 1998-2024 Free Software Foundation, Inc.\qquad Permissions on back} | 
|  | \eject | 
|  | \sec Breakpoints and Watchpoints; | 
|  | break \opt{\it file\tt:}{\it line}\par | 
|  | b \opt{\it file\tt:}{\it line}&set breakpoint at {\it line} number \opt{in \it file}\par | 
|  | eg:\quad{\tt break main.c:37}\quad\cr | 
|  | break \opt{\it file\tt:}{\it func}&set breakpoint at {\it | 
|  | func} \opt{in \it file}\cr | 
|  | break +{\it offset}\par | 
|  | break -{\it offset}&set break at {\it offset} lines from current stop\cr | 
|  | break *{\it addr}&set breakpoint at address {\it addr}\cr | 
|  | break&set breakpoint at next instruction\cr | 
|  | break $\ldots$ if {\it expr}&break conditionally on nonzero {\it expr}\cr | 
|  | cond {\it n} \opt{\it expr}&new conditional expression on breakpoint | 
|  | {\it n}; make unconditional if no {\it expr}\cr | 
|  | tbreak $\ldots$&temporary break; disable when reached\cr | 
|  | rbreak \opt{\it file\tt:}{\it regex}&break on all functions matching {\it | 
|  | regex} \opt{in \it file}\cr | 
|  | watch {\it expr}&set a watchpoint for expression {\it expr}\cr | 
|  | catch {\it event}&break at {\it event}, which may be {\tt catch}, {\tt throw}, | 
|  | {\tt exec}, {\tt fork}, {\tt vfork}, {\tt load}, or {\tt unload}.\cr | 
|  | \cr | 
|  | info break&show defined breakpoints\cr | 
|  | info watch&show defined watchpoints\cr | 
|  | \cr | 
|  | clear&delete breakpoints at next instruction\cr | 
|  | clear \opt{\it file\tt:}{\it fun}&delete breakpoints at entry to {\it fun}()\cr | 
|  | clear \opt{\it file\tt:}{\it line}&delete breakpoints on source line \cr | 
|  | delete \opt{{\it n}}&delete breakpoints | 
|  | \opt{or breakpoint {\it n}}\cr | 
|  | \cr | 
|  | disable \opt{{\it n}}&disable breakpoints | 
|  | \opt{or breakpoint {\it n}} | 
|  | \cr | 
|  | enable \opt{{\it n}}&enable breakpoints | 
|  | \opt{or breakpoint {\it n}} | 
|  | \cr | 
|  | enable once \opt{{\it n}}&enable breakpoints \opt{or breakpoint {\it n}}; | 
|  | disable again when reached | 
|  | \cr | 
|  | enable del \opt{{\it n}}&enable breakpoints \opt{or breakpoint {\it n}}; | 
|  | delete when reached | 
|  | \cr | 
|  | \cr | 
|  | ignore {\it n} {\it count}&ignore breakpoint {\it n}, {\it count} | 
|  | times\cr | 
|  | \cr | 
|  | commands {\it n}\par | 
|  | \qquad \opt{\tt silent}\par | 
|  | \qquad {\it command-list}&execute GDB {\it command-list} every time breakpoint {\it n} is reached. \opt{{\tt silent} suppresses default | 
|  | display}\cr | 
|  | end&end of {\it command-list}\cr | 
|  | \endsec | 
|  |  | 
|  | \sec Program Stack; | 
|  | backtrace \opt{\it n}\par | 
|  | bt \opt{\it n}&print trace of all frames in stack; or of {\it n} | 
|  | frames---innermost if {\it n}{\tt >0}, outermost if {\it n}{\tt <0}\cr | 
|  | frame \opt{\it n}&select frame number {\it n} or frame at address {\it | 
|  | n}; if no {\it n}, display current frame\cr | 
|  | up {\it n}&select frame {\it n} frames up\cr | 
|  | down {\it n}&select frame {\it n} frames down\cr | 
|  | info frame \opt{\it addr}&describe selected frame, or frame at | 
|  | {\it addr}\cr | 
|  | info args&arguments of selected frame\cr | 
|  | info locals&local variables of selected frame\cr | 
|  | info reg \opt{\it rn}$\ldots$\par | 
|  | info all-reg \opt{\it rn}®ister values \opt{for regs {\it rn\/}} in | 
|  | selected frame; {\tt all-reg} includes floating point\cr | 
|  | \endsec | 
|  |  | 
|  | \vfill\eject | 
|  | \sec Execution Control; | 
|  | continue \opt{\it count}\par | 
|  | c \opt{\it count}&continue running; if {\it count} specified, ignore | 
|  | this breakpoint next {\it count} times\cr | 
|  | \cr | 
|  | step \opt{\it count}\par | 
|  | s \opt{\it count}&execute until another line reached; repeat {\it count} times if | 
|  | specified\cr | 
|  | stepi \opt{\it count}\par | 
|  | si \opt{\it count}&step by machine instructions rather than source | 
|  | lines\cr | 
|  | \cr | 
|  | next \opt{\it count}\par | 
|  | n \opt{\it count}&execute next line, including any function calls\cr | 
|  | nexti \opt{\it count}\par | 
|  | ni \opt{\it count}&next machine instruction rather than source | 
|  | line\cr | 
|  | \cr | 
|  | until \opt{\it location}&run until next instruction (or {\it | 
|  | location})\cr | 
|  | finish&run until selected stack frame returns\cr | 
|  | return \opt{\it expr}&pop selected stack frame without executing | 
|  | \opt{setting return value}\cr | 
|  | signal {\it num}&resume execution with signal {\it s} (none if {\tt 0})\cr | 
|  | jump {\it line}\par | 
|  | jump *{\it address}&resume execution at specified {\it line} number or | 
|  | {\it address}\cr | 
|  | set var={\it expr}&evaluate {\it expr} without displaying it; use for | 
|  | altering program variables\cr | 
|  | \endsec | 
|  |  | 
|  | \sec Display; | 
|  | print \opt{\tt/{\it f}\/} \opt{\it expr}\par | 
|  | p \opt{\tt/{\it f}\/} \opt{\it expr}&show value of {\it expr} \opt{or | 
|  | last value \tt \$} according to format {\it f}:\cr | 
|  | \qquad x&hexadecimal\cr | 
|  | \qquad d&signed decimal\cr | 
|  | \qquad u&unsigned decimal\cr | 
|  | \qquad o&octal\cr | 
|  | \qquad t&binary\cr | 
|  | \qquad a&address, absolute and relative\cr | 
|  | \qquad c&character\cr | 
|  | \qquad f&floating point\cr | 
|  | call \opt{\tt /{\it f}\/} {\it expr}&like {\tt print} but does not display | 
|  | {\tt void}\cr | 
|  | x \opt{\tt/{\it Nuf}\/} {\it expr}&examine memory at address {\it expr}; | 
|  | optional format spec follows slash\cr | 
|  | \quad {\it N}&count of how many units to display\cr | 
|  | \quad {\it u}&unit size; one of\cr | 
|  | &{\tt\qquad b}\ individual bytes\cr | 
|  | &{\tt\qquad h}\ halfwords (two bytes)\cr | 
|  | &{\tt\qquad w}\ words (four bytes)\cr | 
|  | &{\tt\qquad g}\ giant words (eight bytes)\cr | 
|  | \quad {\it f}&printing format.  Any {\tt print} format, or\cr | 
|  | &{\tt\qquad s}\ null-terminated string\cr | 
|  | &{\tt\qquad i}\ machine instructions\cr | 
|  | disassem \opt{\it addr}&display memory as machine instructions\cr | 
|  | \endsec | 
|  |  | 
|  | \sec Automatic Display; | 
|  | display \opt{\tt/\it f\/} {\it expr}&show value of {\it expr} each time | 
|  | program stops \opt{according to format {\it f}\/}\cr | 
|  | display&display all enabled expressions on list\cr | 
|  | undisplay {\it n}&remove number(s) {\it n} from list of | 
|  | automatically displayed expressions\cr | 
|  | disable disp {\it n}&disable display for expression(s) number {\it | 
|  | n}\cr | 
|  | enable disp {\it n}&enable display for expression(s) number {\it | 
|  | n}\cr | 
|  | info display&numbered list of display expressions\cr | 
|  | \endsec | 
|  |  | 
|  | \vfill\eject | 
|  |  | 
|  | \sec Expressions; | 
|  | {\it expr}&an expression in C, C++, or Modula-2 (including function calls), or:\cr | 
|  | {\it addr\/}@{\it len}&an array of {\it len} elements beginning at {\it | 
|  | addr}\cr | 
|  | {\it file}::{\it nm}&a variable or function {\it nm} defined in {\it | 
|  | file}\cr | 
|  | $\tt\{${\it type}$\tt\}${\it addr}&read memory at {\it addr} as specified | 
|  | {\it type}\cr | 
|  | \$&most recent displayed value\cr | 
|  | \${\it n}&{\it n}th displayed value\cr | 
|  | \$\$&displayed value previous to \$\cr | 
|  | \$\${\it n}&{\it n}th displayed value back from \$\cr | 
|  | \$\_&last address examined with {\tt x}\cr | 
|  | \$\_\_&value at address \$\_\cr | 
|  | \${\it var}&convenience variable; assign any value\cr | 
|  | \cr | 
|  | show values \opt{{\it n}}&show last 10 values \opt{or surrounding | 
|  | \${\it n}}\cr | 
|  | show conv&display all convenience variables\cr | 
|  | \endsec | 
|  |  | 
|  | \sec Symbol Table; | 
|  | info address {\it s}&show where symbol {\it s} is stored\cr | 
|  | info func \opt{\it regex}&show names, types of defined functions | 
|  | (all, or matching {\it regex})\cr | 
|  | info var \opt{\it regex}&show names, types of global variables (all, | 
|  | or matching {\it regex})\cr | 
|  | whatis \opt{\it expr}\par | 
|  | ptype \opt{\it expr}&show data type of {\it expr} \opt{or \tt \$} | 
|  | without evaluating; {\tt ptype} gives more detail\cr | 
|  | ptype {\it type}&describe type, struct, union, or enum\cr | 
|  | \endsec | 
|  |  | 
|  | \sec GDB Scripts; | 
|  | source {\it script}&read, execute GDB commands from file {\it | 
|  | script}\cr | 
|  | \cr | 
|  | define {\it cmd}\par | 
|  | \qquad {\it command-list}&create new GDB command {\it cmd}; | 
|  | execute script defined by {\it command-list}\cr | 
|  | end&end of {\it command-list}\cr | 
|  | document {\it cmd}\par | 
|  | \qquad {\it help-text}&create online documentation | 
|  | for new GDB command {\it cmd}\cr | 
|  | end&end of {\it help-text}\cr | 
|  | \endsec | 
|  |  | 
|  | \sec Signals; | 
|  | handle {\it signal} {\it act}&specify GDB actions for {\it signal}:\cr | 
|  | \quad print&announce signal\cr | 
|  | \quad noprint&be silent for signal\cr | 
|  | \quad stop&halt execution on signal\cr | 
|  | \quad nostop&do not halt execution\cr | 
|  | \quad pass&allow your program to handle signal\cr | 
|  | \quad nopass&do not allow your program to see signal\cr | 
|  | info signals&show table of signals, GDB action for each\cr | 
|  | \endsec | 
|  |  | 
|  | \sec Debugging Targets; | 
|  | target {\it type} {\it param}&connect to target machine, process, or file\cr | 
|  | help target&display available targets\cr | 
|  | attach {\it param}&connect to another process\cr | 
|  | detach&release target from GDB control\cr | 
|  | \endsec | 
|  |  | 
|  | \vfill\eject | 
|  | \sec Controlling GDB; | 
|  | set {\it param} {\it value}&set one of GDB's internal parameters\cr | 
|  | show {\it param}&display current setting of parameter\cr | 
|  | \xtra{\rm Parameters understood by {\tt set} and {\tt show}:} | 
|  | \quad complaint {\it limit}&number of messages on unusual symbols\cr | 
|  | \quad confirm {\it on/off}&enable or disable cautionary queries\cr | 
|  | \quad editing {\it on/off}&control {\tt readline} command-line editing\cr | 
|  | \quad height {\it lpp}&number of lines before pause in display\cr | 
|  | \quad language {\it lang}&Language for GDB expressions ({\tt auto}, {\tt c} or | 
|  | {\tt modula-2})\cr | 
|  | \quad listsize {\it n}&number of lines shown by {\tt list}\cr | 
|  | \quad prompt {\it str}&use {\it str} as GDB prompt\cr | 
|  | \quad radix {\it base}&octal, decimal, or hex number representation\cr | 
|  | \quad verbose {\it on/off}&control messages when loading | 
|  | symbols\cr | 
|  | \quad width {\it cpl}&number of characters before line folded\cr | 
|  | \quad write {\it on/off}&Allow or forbid patching binary, core files | 
|  | (when reopened with {\tt exec} or {\tt core}) | 
|  | \cr | 
|  | \quad history $\ldots$\par | 
|  | \quad h $\ldots$&groups with the following options:\cr | 
|  | \quad h exp {\it off/on}&disable/enable {\tt readline} history expansion\cr | 
|  | \quad h file {\it filename}&file for recording GDB command history\cr | 
|  | \quad h size {\it size}&number of commands kept in history list\cr | 
|  | \quad h save {\it off/on}&control use of external file for | 
|  | command history\cr | 
|  | \cr | 
|  | \quad print $\ldots$\par | 
|  | \quad p $\ldots$&groups with the following options:\cr | 
|  | \quad p address {\it on/off}&print memory addresses in stacks, | 
|  | values\cr | 
|  | \quad p  array {\it off/on}&compact or attractive format for | 
|  | arrays\cr | 
|  | \quad p demangl {\it on/off}&source (demangled) or internal form for C++ | 
|  | symbols\cr | 
|  | \quad p asm-dem {\it on/off}&demangle C++ symbols in | 
|  | machine-instruction output\cr | 
|  | \quad p elements {\it limit}&number of array elements to display\cr | 
|  | \quad p object {\it on/off}&print C++ derived types for objects\cr | 
|  | \quad p pretty {\it off/on}&struct display: compact or indented\cr | 
|  | \quad p union {\it on/off}&display of union members\cr | 
|  | \quad p vtbl {\it off/on}&display of C++ virtual function | 
|  | tables\cr | 
|  | \cr | 
|  | show commands&show last 10 commands\cr | 
|  | show commands {\it n}&show 10 commands around number {\it n}\cr | 
|  | show commands +&show next 10 commands\cr | 
|  | \endsec | 
|  |  | 
|  | \sec Working Files; | 
|  | file \opt{\it file}&use {\it file} for both symbols and executable; | 
|  | with no arg, discard both\cr | 
|  | core \opt{\it file}&read {\it file} as coredump; or discard\cr | 
|  | exec \opt{\it file}&use {\it file} as executable only; or discard\cr | 
|  | symbol \opt{\it file}&use symbol table from {\it file}; or discard\cr | 
|  | load {\it file}&dynamically link {\it file\/} and add its symbols\cr | 
|  | add-sym {\it file} {\it addr}&read additional symbols from {\it file}, | 
|  | dynamically loaded at {\it addr}\cr | 
|  | info files&display working files and targets in use\cr | 
|  | path {\it dirs}&add {\it dirs} to front of path searched for | 
|  | executable and symbol files\cr | 
|  | show path&display executable and symbol file path\cr | 
|  | info share&list names of shared libraries currently loaded\cr | 
|  | \endsec | 
|  |  | 
|  | \vfill\eject | 
|  | \sec Source Files; | 
|  | dir {\it names}&add directory {\it names} to front of source path\cr | 
|  | dir&clear source path\cr | 
|  | show dir&show current source path\cr | 
|  | \cr | 
|  | list&show next ten lines of source\cr | 
|  | list -&show previous ten lines\cr | 
|  | list {\it lines}&display source surrounding {\it lines}, | 
|  | specified as:\cr | 
|  | \quad{\opt{\it file\tt:}\it num}&line number \opt{in named file}\cr | 
|  | \quad{\opt{\it file\tt:}\it function}&beginning of function \opt{in | 
|  | named file}\cr | 
|  | \quad{\tt +\it off}&{\it off} lines after last printed\cr | 
|  | \quad{\tt -\it off}&{\it off} lines previous to last printed\cr | 
|  | \quad{\tt*\it address}&line containing {\it address}\cr | 
|  | list {\it f},{\it l}&from line {\it f} to line {\it l}\cr | 
|  | info line {\it num}&show starting, ending addresses of compiled code for | 
|  | source line {\it num}\cr | 
|  | info source&show name of current source file\cr | 
|  | info sources&list all source files in use\cr | 
|  | forw {\it regex}&search following source lines for {\it regex}\cr | 
|  | rev {\it regex}&search preceding source lines for {\it regex}\cr | 
|  | \endsec | 
|  |  | 
|  | \sec GDB under GNU Emacs; | 
|  | M-x gdb&run GDB under Emacs\cr | 
|  | \ctl{h} m&describe GDB mode\cr | 
|  | M-s&step one line ({\tt step})\cr | 
|  | M-n&next line ({\tt next})\cr | 
|  | M-i&step one instruction ({\tt stepi})\cr | 
|  | \ctl{c} \ctl{f}&finish current stack frame ({\tt finish})\cr | 
|  | M-c&continue ({\tt cont})\cr | 
|  | M-u&up {\it arg} frames ({\tt up})\cr | 
|  | M-d&down {\it arg} frames ({\tt down})\cr | 
|  | \ctl{x} \&© number from point, insert at end\cr | 
|  | \ctl{x} SPC&(in source file) set break at point\cr | 
|  | \endsec | 
|  |  | 
|  | \sec GDB License; | 
|  | show copying&Display GNU General Public License\cr | 
|  | show warranty&There is NO WARRANTY for GDB.  Display full no-warranty | 
|  | statement.\cr | 
|  | \endsec | 
|  |  | 
|  |  | 
|  | \vfill | 
|  | {\smrm\parskip=6pt | 
|  | Copyright \copyright 1991-2024 Free Software Foundation, Inc. | 
|  | Author: Roland H. Pesch | 
|  |  | 
|  | The author assumes no responsibility for any errors on this card. | 
|  |  | 
|  | This card may be freely distributed under the terms of the GNU | 
|  | General Public License. | 
|  |  | 
|  | Please contribute to development of this card by | 
|  | annotating it.  Improvements can be sent to bug-gdb@gnu.org. | 
|  |  | 
|  | GDB itself is free software; you are welcome to distribute copies of | 
|  | it under the terms of the GNU General Public License.  There is | 
|  | absolutely no warranty for GDB. | 
|  | } | 
|  | \end |