study3gdb

study3gdb

(gdb) list
1	#include <stdio.h>
2	#include <string.h>
3	
4	int main() {
5	  char str_a[20];
6	  char *pointer;
7	  char *pointer2;
8	
9	  strcpy(str_a, "Hello, world!\n");
10	  pointer = str_a;
(gdb) 
11	  printf(pointer);
12	
13	  pointer2 = pointer + 2;
14	  printf(pointer2);
15	  strcpy(pointer2, "y you guys!\n");
16	  printf(pointer);
17	}
(gdb) break 11
Breakpoint 1 at 0x100000db3: file pointer.c, line 11.
(gdb) run
Starting program: /Users/kenji/Dropbox/home/work/github/study/pointer 
Reading symbols for shared libraries +........................ done

Breakpoint 1, main () at pointer.c:11
11	  printf(pointer);
(gdb) x/xw pointer
0x7fff5fbff41c:	0x6c6c6548
(gdb) x/s pointer
0x7fff5fbff41c:	 "Hello, world!\n"
(gdb) x/xw &pointer
0x7fff5fbff410:	0x5fbff41c
(gdb) print &pointer
$1 = (char **) 0x7fff5fbff410
(gdb) print pointer
$2 = 0x7fff5fbff41c