看gdb源码的时候无意发现一个奇怪的写法, 仔细查看了之后明白了其中的秘密
fun()->mem1 = xx; fun()->mem2(4);这是我实现的一个代码:
#include <stdio.h> #include <stdlib.h> typedef int (*print_fun_t)(const char *, ...); struct inferior { int attach_flag; print_fun_t print; }; /* The Current Inferior. */ static struct inferior *current_inferior_ = NULL; struct inferior* current_inferior (void) { return current_inferior_; } void set_current_inferior (struct inferior *inf) { current_inferior_ = inf; } int main() { struct inferior *inf; inf = (struct inferior *)malloc(sizeof(struct inferior)); inf->print = printf; set_current_inferior(inf); current_inferior()->attach_flag = 10; current_inferior()->print("my attach_flag: %d\n", current_inferior()->attach_flag); return 0; }
