Programming

Hi ,

Any gdb user could see my problem.



Let me describe what i want to do.
i have a test utility to send message to running process.
My interest is to go through to functions calls when my test case starts.
In a simple way i want have a code walk for a particular scenario of a test case.
The process say p21 is running .
now i execute a testcase .
p21 do message handling ...(whatever).

I want to use gdb to see , what all functions are called during the test.

I do not have the idea to do it.

I came to know something like.

run gdb // this i have done
attach the process id to the gdb
attach <pid of p21> // this i have done

next i m hung up , what to do next.

Could some one gdb user help me out


Thanks a lot.
Aki

you should read some good manual to use gdb.
By the way if you want to debug the program my_program because of a seg fault for instance you can do this :

Code:

// Don't forget to add the -ggdb option at compilation
$ gcc -c -ggdb my_program.c
$ gcc -o my_program my_program.o
$ gdb ./my_program
//some useless text
(gdb) r
// r means run, it launch the program.
// now say the program fails because of a seg fault 
(gdb) bt
// bt means backtrace, it will print on the screen the call tree until the error

else you can go step by step, by replacing r by s. you can also put some breakpoint.
you should type this :

Code:

 (gdb) help
 // it will print some section
 (gdb) help section
// more information about the sections

if you want something visual you can use ddd.

but i repeat, there is some usefull manual all over the Internet.