【跟我一起學gdb】(3)靈活使用arg0,arg1可變入參------打印任意給定的數據結構對象的所有成員變量

mian.c

tom@ubuntu:~/dvp$ cat -n main.c
     1	#include <stdio.h>
     2	
     3	typedef struct
     4	{
     5		int iW;
     6		int iH;
     7		int iX;
     8		int iY;
     9	}BOX_ST;
    10	
    11	int main()
    12	{
    13		BOX_ST stBox;
    14		
    15		stBox.iW = 1;
    16		stBox.iH = 2;
    17		stBox.iX  = 3;
    18		stBox.iY  = 4;
    19	
    20		return 0;
    21	}
tom@ubuntu:~/dvp$ 

gdb腳本(使用arg0 arg1,.....)

使用arg0 arg1 arg2, ....等可變參數來代表輸入的任意名稱的數據結構對象

tom@ubuntu:~/dvp$ cat -n gdbcmd_printBOX_ST.txt
     1	define print_stBox
     2	print $arg0
     3	end
tom@ubuntu:~/dvp$ 

使用gdb腳本

(gdb) file ./a.out 
Reading symbols from ./a.out...done.
(gdb) list main 
7		int iX;
8		int iY;
9	}BOX_ST;
10	
11	int main()
12	{
13		BOX_ST stBox;
14		
15		stBox.iW = 1;
16		stBox.iH = 2;
(gdb) l
17		stBox.iX  = 3;
18		stBox.iY  = 4;
19	
20		return 0;
21	}
(gdb) break 20
Breakpoint 1 at 0x4004f6: file main.c, line 20.
(gdb) source gdbcmd_printBOX_ST.txt
(gdb) print
print         print-object  print_stbox   printf        
(gdb) run
Starting program: /home/tom/dvp/a.out 

Breakpoint 1, main () at main.c:20
20		return 0;
(gdb) print_stbox stBox
$1 = {iW = 1, iH = 2, iX = 3, iY = 4}
(gdb) 

《完》