初步使用objdump反编译命令

#include 

#define STACK_SIZE 32
void static printStack(); 


void fun1();  
void fun2();  
void fun3();  
void print_stack();  
 
int main()  
{  
    //atexit(printStack);

    fun3();
    
    return;
     
}  
  
void fun1()  
{  
    printf("print_fun1\n");    
    print_stack(); 
    //printStack();
}  
  
void fun2()  
{  
    printf("print_fun2\n");  
    fun1();  
}  
  
void fun3()  
{  
    printf("print_fun3\n"); 
    fun2();  
}  
  
void print_stack()  
{  
    int size = 16;  
    int i;    
    void *array[16];  
    int stack_num = backtrace(array, size);  
    char **stacktrace = NULL;  
          
    stacktrace = (char**)backtrace_symbols(array, stack_num);  
      
    for(i = 0; i < stack_num; i++)  
    {  
        printf("%d----->%s\n",i, stacktrace[i]);  
    }  
    free(stacktrace);  
}  


void static printStack(void)
{

    void *trace[STACK_SIZE];
    size_t size = backtrace(trace, STACK_SIZE);
    char **symbols = (char **)backtrace_symbols(trace,size);
    size_t i = 0;
    for(; i%s\n", i, symbols[i]);
    }
    return;
}

接下来使用下面这条命令编译：
gcc -o testexit testexit.c -g -lpthread -rdynamic
重点是添加-rdynamic否者结果是这样的：

[root@host-192-0-11-183 csapp]# ./testexit
print_fun3
print_fun2
print_fun1
0----->./testexit() [0x402f05]
1----->./testexit() [0x402ea4]
2----->./testexit() [0x402ebe]
3----->./testexit() [0x402ed8]
4----->./testexit() [0x402e89]
5----->/lib64/libc.so.6(__libc_start_main+0xf5) [0x7f046bd36c05]
6----->./testexit() [0x401a19]

使用-rdynamic之后结果如下：

[root@host-192-0-11-183 csapp]# ./testexit
print_fun3
print_fun2
print_fun1
0----->./testexit(print_stack+0x2b) [0x403df5]
1----->./testexit(fun1+0x18) [0x403d94]
2----->./testexit(fun2+0x18) [0x403dae]
3----->./testexit(fun3+0x18) [0x403dc8]
4----->./testexit(main+0xe) [0x403d79]
5----->/lib64/libc.so.6(__libc_start_main+0xf5) [0x7fb95659fc05]
6----->./testexit() [0x402909]

关于-rdynamic参考下面这篇文章：
https://blog.csdn.net/freeelinux/article/details/52910636
关于exit(),_exit(),return这三者之间的关系，参看如下几篇文章：
https://blog.csdn.net/kang___xi/article/details/80545510
https://blog.csdn.net/drdairen/article/details/51896141
https://blog.csdn.net/susershine/article/details/17404541

exit()与_exit()关系