Is there any way to extract variables that are being passed to a particular function as parameters in a given c code?
For an example,
main()
{
int a = 10;
float b = 2.0f;
funcA(a,b);
}
Need is to extract the information that variable a & variable b are passed to funcA in a given C code.
Is there a way to extract these information using gdb and it's function breakpoints?
when you are in any function typing frame will give you parameters information of function.
Below are some other commands you can use to get to know more about local variables and parameters.
info locals
frame
info args
more gdb commands
sample :
(gdb) b main
Note: breakpoint 1 also set at pc 0x40053e.
Breakpoint 2 at 0x40053e: file main.c, line 6.
(gdb) r
Starting program: /home/a.out
Breakpoint 1, main () at main.c:6
6 int a = 10;
(gdb) n
7 float b = 2.0f;
(gdb) info locals
a = 10
b = 0
x = 0
(gdb) frame
#0 main () at main.c:7
7 float b = 2.0f;
(gdb) next
9 int x = funcA(a,b);
(gdb) step
funcA (a=10, b=2) at main.c:16
16 int sum = 0;
(gdb) frame
#0 funcA (a=10, b=2) at main.c:16
16 int sum = 0;
(gdb) info args
a = 10
b = 2
(gdb) info locals
sum = 0
(gdb) p a
$1 = 10
(gdb) print b
$2 = 2
(gdb)
