Again failing to post topics and my assignments I said previously to post.
These days I am particularly busy with an assignment to implement a small dbms. Though a big task doing it as a part by part assignment. Hoping to post all my previous assignments, but main problem i am facing is where to upload the programs. I used ensips for my previous uploads but esnips is not working here at my univ as flash is blocked.
Any way that's for today.
Wednesday, July 28, 2010
Wednesday, July 21, 2010
GDB guide
Today I found a good short and quick introduction to gdb here.
This is a short preview of it -
This is a short preview of it -
Help Commands | |
help command | Get help on a certain command |
apropos keyword | Search help for a particular keyword |
Starting and Quitting | |
gdb [-tui] [-c core] [exename] | (Unix Command) Start gdb on an executable or standalone; specify "-tui" to start the TUI GUI; specify "-c" with a corefile name to see where a crash occurred |
run [arg1] [arg2] [...] | Run the currently loaded program with the given command line arguments |
quit | Exit the debugger |
file exename | Load an executable file by name |
Breakpoints and Watchpoints | |
break location | Set a breakpoint at a location, line number, or file (e.g. "main", "5", or "hello.c:23") |
watch expression | Break when a variable is written to |
rwatch expression | Break when a variable is read from |
awatch expression | Break when a variable is written to or read from |
info break | Display breakpoint and watchpoint information and numbers |
info watch | Same as info break |
clear location | Clear a breakpoint from a location |
delete num | Delete a breakpoint or watchpoint by number |
Stepping and Running | |
next | Run to the next line of this function |
step | Step into the function on this line, if possible |
stepi | Step a single assembly instruction |
continue | Keep running from here |
CTRL-C | Stop running, wherever you are |
finish | Run until the end of the current function |
advance location | Advance to a location, line number, or file (e.g. "somefunction", "5", or "hello.c:23") |
jump location | Just like continue, except jump to a particular location first. |
Examining and Modifying Variables | |
display expression | Display the value of a variable or expression every step of the program—the expression must make sense in the current scope |
info display | Show a list of expressions currently being displayed and their numbers |
undisplay num | Stop showing an expression identified by its number (see info display) |
print expression | Print the value of a variable or expression |
printf formatstr expressionlist | Do some formatted output with printf() e.g. printf "i = %d, p = %s\n", i, p |
set variable expression | Set a variable to value, e.g. set variable x=20 |
set (expression) | Works like set variable |
Window Commands | |
info win | Shows current window info |
focus winname | Set focus to a particular window bby name ("SRC", "CMD", "ASM", or "REG") or by position ("next" or "prev") |
fs | Alias for focus |
layout type | Set the window layout ("src", "asm", "split", or "reg") |
tui reg type | Set the register window layout ("general", "float", "system", or "next") |
winheight val | Set the window height (either an absolute value, or a relative value prefaced with "+" or "-") |
wh | Alias for winheight |
set disassembly-flavor flavor | Set the look-and-feel of the disassembly. On Intel machines, valid flavors are intel and att |
Misc Commands | |
RETURN | Hit RETURN to repeat the last command |
backtrace | Show the current stack |
bt | Alias for backtrace |
attach pid | Attach to an already-running process by its PID |
info registers | Dump integer registers to screen |
info all-registers | Dump all registers to screen |
Monday, July 19, 2010
After One Year...
Almost one year have passed since my college ended and I came to this new University.I don't know what have I really done during this time.Sometimes I feel I may have changed during this time.But things have not changed much though.
I said earlier that I would post here more frequently than ever, but something never change so easily.
By the way, I have only posted my programs from my first term. Posting programs from 4 terms is pending hoping to post that soon.
I know nobody reads this blog, but I am thinking to post things here just to practice writing.
Oh well. Thats for now...
I said earlier that I would post here more frequently than ever, but something never change so easily.
By the way, I have only posted my programs from my first term. Posting programs from 4 terms is pending hoping to post that soon.
I know nobody reads this blog, but I am thinking to post things here just to practice writing.
Oh well. Thats for now...
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