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White -box

and
Black -box

Memory violation
(segmentation faults)

$ gcc test.c -o test.o
$ ./test.o

$ gcc -g test.c -o test.o
$ gdb test.o

ﬁle
run
start main break
Ctrl+c
list [line/function]
print [var]
next [times]
step [times]
until [line]
continue
ﬁnish function
jump [line]
info [command] (ex:info break)

Breakpoint
help breakpoints breakpoints
break [line] breakpoint
break [function]
info break breakpoints
delete [n] breakpoint ( )
clear [line] breakpoint ( )
enable [n] breakpoint ( )
enable once [n] breakpoint break
disable [n] breakpoint ( )
ignore [n] [cont] breakpoint ( ) (cont )
condition [n] [cond] cond break
break [line] [cond]
break 10 if n > 5
commands [n] break ,

watchpoint

watch [var] var break
rwatch [var] var break
awatch [var] var
info watch break watch point

display
step next

display [var] display
undisplay [n] n display
enable display n display
[n]
disable display n display
[n] display
info display table

function calls

backtrace function stack
up
down
frame [n] frame
return [var] return

• (gdb) help all
• (gdb) help
• Reference

gdbtui ccdebug Xcode

cgdb Glewn GDBtk/Insight

Xxgdb Emacs WDB

GVD DDD Dev-c

Nemiver KDb ........

Reference
• GNU
http://www.gnu.org/software/gdb/

• GNU Debugger (gdb) Part I
http://jserv.sayya.org/debugger/HappyGDB-PartI-2008-07-12.pdf

• debugger GNU GDB
http://cse.tw/981class/ﬁle/upe3.pdf

• Gray Hat Python
• http://www.cmlab.csie.ntu.edu.tw/~daniel/linux/gdb.html

• http://www.study-area.org/cyril/opentools/opentools/
x1253.html

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