Re: Trace each statement

Doug Evans
2010-12-18T18:19:47Z

On Thu, Dec 16, 2010 at 3:37 AM, Haitao Dan <dan.haitao@gmail.com> wrote:
> Dear All,
>
> Is there a way to output the execution path of the run of a c program using GDB?
>
> Thank you very much!

This is a simplistic example that can be built on if you want.

$ cat trace-prog.c
int x;

int
main ()
{
int i;

for (i = 0; i < 10; ++i)
x += i;

return 0;
}
$ cat trace-prog.gdb
# -*- python -*-

python

gdb.execute ("start")

while True:
try:
gdb.execute ("step")
except:
break
$ gcc -g trace-prog.c -o trace-prog
$ ./gdb --batch -q -x trace-prog.gdb trace-prog.x32
Temporary breakpoint 1 at 0x80483a5: file trace-prog.c, line 9.

Temporary breakpoint 1, main () at trace-prog.c:9
9 for (i = 0; i < 10; ++i)
10 x += i;
9 for (i = 0; i < 10; ++i)
10 x += i;
9 for (i = 0; i < 10; ++i)
10 x += i;
9 for (i = 0; i < 10; ++i)
10 x += i;
9 for (i = 0; i < 10; ++i)
10 x += i;
9 for (i = 0; i < 10; ++i)
10 x += i;
9 for (i = 0; i < 10; ++i)
10 x += i;
9 for (i = 0; i < 10; ++i)
10 x += i;
9 for (i = 0; i < 10; ++i)
10 x += i;
9 for (i = 0; i < 10; ++i)
10 x += i;
9 for (i = 0; i < 10; ++i)
12 return 0;
13 }
0x0048f6e5 in __libc_start_main () from /lib/libc.so.6
Single stepping until exit from function __libc_start_main,
which has no line number information.

Program exited normally.
$