On Tue, 2010-05-25 at 11:13 +0200, Mark Phalan wrote:
> On Mon, 2010-05-24 at 15:16 -0400, Chad Mynhier wrote:
> > On Mon, May 24, 2010 at 8:56 AM, Mark Phalan <mark.pha...@sun.com> wrote:
> > > On Mon, 2010-05-24 at 13:42 +0200, Mark Phalan wrote:
> > >> On Tue, 2010-05-18 at 17:28 -0400, Angelo Rajadurai wrote:
> > >> >
> > >> > The way to fix it is to set strsize
> > >> >
> > >> > #pragma D option strsize=1024 // make sure your string can fit in!
> > >> >
> > >>
> > >> Thanks for the idea but it doesn't seem to make any difference even if I
> > >> increase strsize up to 2097152 (above which I get drops).
> > >> The size of the string is just 5 characters "TEST" + "@".
> > >>
> > >> I'll file a bug.
> > >
> > >
> > > 6955097 "out of scratch space in action" error with small amounts of
> > > data
> > >
> >
> > I don't think this is a bug in DTrace, I think this is just an
> > off-by-one error in your original code. Try adding 1 to data.length.
>
> In the simple example I included the string is NULL-terminated. This
> isn't the case in reality. strings are represented by a pointer (data)
> and a string length (length).
>
> Anyway, I changed the C to look like this:
>
> int main() {
> my_data data;
>
> data.length = strlen("TEST") + 1;
> data.data = "TEST";
>
> SIMPLE_START(&data);
> }
>
> and I see exactly the same error.
I take that back. If I simply add one to the length so the NULL char is
copied in it works as expected.
-M
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