[DTrace-devel] [PATCH 15/15] Implement the proc provider

[Kris Van Hees]

On Thu, Feb 23, 2023 at 06:02:48PM +0000, Nick Alcock wrote:
> On 23 Feb 2023, Kris Van Hees told this:

> >> > +	{ "signal-send", 2, { 1, "int", } },
> >> 
> >> It took a bit of effort to figure out that the native arg type (e.g
> >> "int" here) being NULL is used to indicate a probe with zero args. You
> >> should probably note that too :)
> >
> > Well, no...  NULL as translated type (see above) means that no translation is
> > needed.  No values other than the name (see exec-success above) means there are
> > no arguments and that is simply because the 2nd value in the struct is 0.
> 
> Really? It looks to me like you fall out of that loop due to
> 
> >> > +				if (arg->argdesc.native == NULL)
> >> > +					break;
> 
> i.e. due to the native type being NULL. What am I missing?

Oh yes, duh, you are right.  I forgot that the ordinal argument index actually
is not useful because 0 obviously means the first argument.  Thanks for
correcting me.