You pass the current user ID to this function to get back every user ID that this user is following.
将当前用户 ID 传递给该函数,就可以得到该用户正在追随的每个用户的 ID。
Defining a unique ID for your custom function.
为定制函数定义惟一的ID。
Unlike the system call probe, user function probes must specify a specific process ID and are limited to probe the function at entry.
与系统调用探测不同,用户函数探测必须指定一个进程ID,而且只能探测函数的进入。
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