Thread: how to list all stack valies from GDB debugger

Hi,

I am trying to see all values in data segment ,stack segment from GDB debugger

in this process,

i am able to see the stack values from GDB command "backtrace full" .

I want to see all values the values in data segment( both initialized and uninitialized vlues) also. I mean mainly i want to see all the global variables list. Because any way i can see constant and static values if i define in main function from "backtrace full"

But i did have any idea to see total variables in data segment(mainly global variable) from GDB commands

any body suggest me to see all those values (global values)?

i know the see the golbal values like "print variablename" in gdb.

but i want to see all the variable stored in data segment from gdb.

please help any one.


please see the below program to see stack values from GDB

Code:

#include<stdio.h>
int g;
int main()
{
        int i;
        const int c;
        static int s;
        fun1();
        fun2();
        fun3();
        fun4();
        return 0;
}

int fun1()
{
        int i=1;
        printf ("enter the value of i in function one\n");
        scanf ("%d",&i);
        printf ("%d\n",i);
        return 0;
}
int fun2()
{
        int i=2;
        return 0;
}
int fun3()
{
        int i=3;
        return 0;
}
int fun4()
{
        int i=4;
        return 0;
}

GDB logs

Code:

cc -g 25.c
[root@examples]# gdb a.out
GNU gdb Red Hat Linux (6.3.0.0-1.96rh)
Copyright 2004 Free Software Foundation, Inc.
GDB is free software, covered by the GNU General Public License, and you are
welcome to change it and/or distribute copies of it under certain conditions.
Type "show copying" to see the conditions.
There is absolutely no warranty for GDB.  Type "show warranty" for details.
This GDB was configured as "i386-redhat-linux-gnu"...Using host libthread_db library "/lib/tls/libthread_db.so.1".

(gdb) break 0
No line 0 in file "25.c".
(gdb) break 1
Breakpoint 1 at 0x804839c: file 25.c, line 1.
(gdb) run
Starting program: /home/koti/examples/c_examples/a.out

Breakpoint 1, main () at 25.c:4
4       {
(gdb) n
8               fun1();
(gdb) backtrace full
#0  main () at 25.c:8
        i = 9190560
        c = 0
        s = 0
(gdb) n
enter the value of i in function one
1
1
9               fun2();
(gdb)

info variables will give you the names of all the global variables, which you can then print.

Your globals appear before the non-debugging symbols. I just ran a quick test and got

Code:

All defined variables:

File temp.c:
struct Leg global;

Non-debugging symbols:
<lots of things>

Hi,

I understand your reply.

but my ultimate aim is to see all the variables stored in data segment.

it there any command to check this? is it possible?

because if i have 200 global variables, its difficult to see each value by giving "printf $globalvariablename" command.

Originally Posted by nkrao123@gmail.

because if i have 200 global variables...

Trust me on this... If you're program has 200 global variables, you need to start re-writing!

hi if i give the command "info variables" , is there any way to send all logs to a fine like

info variables > logs.txt

?

On Unix and Linux systems it'd be something like:

Code:

gdb binfilename | tee outfilename

but it'll give you globals created by the linker too.

HI all,

Thanks for your reply's.