Date: Fri, 28 Nov 2008 11:57:02 -0800 From: Tim Kientzle <kientzle@freebsd.org> To: Alexander Leidinger <Alexander@Leidinger.net> Cc: freebsd-current@freebsd.org, Ivan Voras <ivoras@freebsd.org> Subject: Re: HOWTO in wiki: adding custom dtrace probes in the kernel Message-ID: <49304D0E.3030201@freebsd.org> In-Reply-To: <20081128171243.18141hd28pf4ve00@webmail.leidinger.net> References: <20081128154514.82247fe47bn83lkw@webmail.leidinger.net> <ggp10c$pdt$1@ger.gmane.org> <20081128171243.18141hd28pf4ve00@webmail.leidinger.net>
next in thread | previous in thread | raw e-mail | index | archive | help
>> SDT_PROBE(foobar, source_file1, foo, entry, a, b, 0, 0, 0); >> >> Here: why are the last three arguments zeroes? > > SDT_PROBE() is a macro with a fixed number of macros, so we have to > fill with 0 in case we don't want to provide some data. Maybe there's a > way to provide more arguments if you do it by hand instead of using the > SDT_PROBE() macro (TODO item added in the wiki to have a look at this, > feel free to improve the wiki page). Seems that SDT_PROBE() should be using C99s "variadic macro" feature. Tim
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?49304D0E.3030201>