set argument

Mark Johnston markj at freebsd.org
Mon Mar 2 16:13:56 UTC 2020


On Mon, Mar 02, 2020 at 03:33:57PM +0530, Kamal R. Prasad wrote:
> hello,
> 
>  How does dtrace access the argument type declarations when we define a new
> SDT? eg:- I define an SDT that has arg0 as (struct mystrust*)
> 
> I have defined in my proprietary header file
> ---------------
> typedef struct abc {
> int a;
> int b;
> int c;
> };
> typedef struct def {
> int d;
> int e;
> int f;
> };
> 
> typedef struct mystrust {
> struct abc* myarg1;
> struct def* myarg2
> };
> ---------------
> 
> I want my probe to be able to access the typedeffor struct abc and struct
> def.

Is this in the kernel or userspace?  We automatically build the kernel
with CTF info included, so dtrace should be able to see the structure
definitions automatically.


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