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Computer Networking I

by: Alayna Veum

Computer Networking I CS 3251

Alayna Veum

GPA 3.81


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Class Notes
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This 0 page Class Notes was uploaded by Alayna Veum on Monday November 2, 2015. The Class Notes belongs to CS 3251 at Georgia Institute of Technology - Main Campus taught by Staff in Fall. Since its upload, it has received 7 views. For similar materials see /class/234103/cs-3251-georgia-institute-of-technology-main-campus in ComputerScienence at Georgia Institute of Technology - Main Campus.

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Date Created: 11/02/15
GDB QUICK REFERENCE GDB Vasion 4 Essential Commands gdb program core debug program using coredump core b lefunction set breakpoint at function in le run arglirt start your program with arglirt bt backtrace display program stack p expr 39 C n next line stepping over lnction calls s next line stepping into function calls Starting GDB gdb start GDB with no debugging les gdb program begin debugging program gdb program core debug coredump core produced by program gdb help describe command line options Stopping GDB quit exit GDB also q or EOF eg Cad INTERRUPT eg Cec terminate current command or send to running process Getting Help help list classes of commands help clarr oneline descriptions for commands in clarr help command describe command Executing your Program run arglist start your program with arglist run start your program with current argument list run ltinf gtoutf start your program with input output redirected kill kill running program tty dev set args arglirt set args show args use dzv as stdin and stdout for next run specify arglist for next run specify empty argument list display argument list show environment show all environment variables show eny var show value of environment variable var set eny var string set environment variable var unset eny var remove var from environment Shell Commands cd dir change working directory to dir pwd Print working directory make call make shell cmd execute arbitrary shell command string surround opuonat arguments 1991 1992 Free Software Foundation Inc Pa mlsslons on back show one or more argummts Breakpoints and Watchpoints break leline set breakpoint at line number in le b le line eg break mainc 37 break lezfunction set breakpoint at function in le break o ret set break at o ret lines from current stop break eo ret break addr break break cond n mgr set breakpoint at address addr set breakpoint at next instruction break conditionally on nonzero expr new conditional expression on breakpoint n make unconditional if no agar temporary break disable when reached break on all functions matching rogex set a watchpoint for expression expr break at C handler for exception x i f expr tbreak rbreak regex Wat ch expr cat ch x info break show de ned breakpoints info watch show de ned watchpoints clear clear lezfun clear lezline delete n delete breakpoints at next instruction delete breakpoints at entry to funO delete breakpoints on source line delete breakpoints or breakpoint n disable n enable n enable once n disable breakpoints or breakpoint n enable breakpoints or breakpoint n enable breakpoints or breakpoint n disable again when reached enable breakpoints or breakpoint n delete when reached enable del n ignore n count ignore breakpoint n count times commands n silent commandlist execute GDB commandlist every time breakpoint n is reached silent suppresses default display end end of commandlist Program Stack backtrace n print trace of all frames in stack or of n bt n framesginnermost i gto outermost if nlt0 select frame number n or frame at address n if no n display current frame up n select frame n frames up down n select frame n frames down info frame addr describe selected frame or frame at addr info arguments of selected frame local variables of selected frame register values for reg rn in selected frame allereg includes oating point exception handlers active in selected frame frame n info info info info catch Execution Control cont inue count continue running if count speci ed ignore c count this breakpoint next count times st ep count execute until another line reached repeat s count count times if speci ed step by machine instructions rather than source lines stepi count si count next count execute next line including any lnction n count calls nexti count next machine instruction rather than source ni count line until location finish return mgr run until next instruction or location run until selected stack frame returns pop selected stack frame without executing setting return value resume execution with signal r none if 0 resume execution at speci ed line number or addrerr evaluate expr without displaying it use for altering program variables signal num s et ya rexpr Display print f Facpr show value of expr or last value 5 p agar according to format x hexadecimal signed decimal unsigned decimal octal binary address absolute and relative quotOSOUVBUU t call expr x Nuf expr like print but does not display void examine memory at address em optional format spec follows slash N count of how many units to display u unit size one of w words four bytes 9 giant words eight bytes f printing format Any print format or s nullterminated string i machine instructions disassem addr display memory as machine instructions Automatic Display display f agar show value of expr each time program stops according to format f display all enabled expressions on list remove numbers n from list of automatically displayed expressions disable display for expressions number n enable display for expressions number n numbered list of display expressions display undisplay n disable disp n enable disp n info display


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