Does Dtrace4linux support args? about linux HOT 2 CLOSED

These should work, but whether it does work may depend on either the CTF record defining what types the args[] array is, or, you defining the appropriate "struct" to mimic what the driver does.

I normally start by printing the values as pure hex numbers, see if they are plausible pointers, and try one step at a time. If you are trying to trace a loadable module, chances are very high that the kernel CTF file does not have your function prototype available, so it doesnt know the types of the parameters. You may need explicit type casts using arg0, arg1, etc.

from linux.

Dear:

I use arg0, arg1, ...etc with explicit type. (For this goal, I modify the driver/ctf_struct.c for supporting my data struct).
Now, it can work when I use arg0 with explicit type. (I solve the problem in Issue#30 by your suggestion.)
I try to realize how the CTF file work. I think the reason that I can not use args[0] directly is that CTF file does not have my function prototype.

But there is one thing made me confused.
If we can use the arg0, arg1, ...etc with the explicit type, why the CTF file does not have our function prototype?

Thanks!!!

from linux.