在GDB中我如何獲取全局變量的地址

Question

我有一些我想要檢查的全局變量。但「info var my_global」不顯示地址。有沒有辦法獲得全局變量的真實地址？

Answer 1

print &my_global應該可以正常工作。一個簡單的例子：

#include <stdio.h> 

int x = 12; 

int main(int argc, char **argv) 
{ 
    printf("%d\n", x); 
    return 0; 
} 

然後建立&調試：

$ make example 
clang -g example.c -o example 
$ gdb example 
(gdb) break main 
Breakpoint 1 at 0x100000f04: file example.c, line 8. 
(gdb) run 
Starting program: example 
Reading symbols for shared libraries +. done 

Breakpoint 1, main() at example.c:8 
8  printf("%d\n", x); 
(gdb) print &x 
$1 = (int *) 0x100001068 
Current language: auto; currently minimal