dtrace从应用程序访问全局变量

suppose my app code looks like this:

假设我的应用程序代码是这样的:

#include <stdio.h>int global_var;void change_var(){    global_var++;}    int main(void){    change_var();    retrun 0;}

Now, can You please tell me, if there is any possibilty to access global_var in dtrace script and print it ?

现在，您能告诉我，是否有可能在dtrace脚本中访问global_var并打印它吗?

Best regards

致以最亲切的问候

1 个解决方案

#1

You can, but you have to know the variable's address. Your D would resemble

你可以，但是你必须知道变量的地址。你的D会像

self->kp = (int *) copyin(<address>, sizeof (int));printf("global_var = 0x%d\n", *self->kp)