Date: Mon, 19 Dec 2016 21:47:19 +0100 From: Domagoj Stolfa <domagoj.stolfa@gmail.com> To: Adrian Chadd <adrian.chadd@gmail.com> Cc: "freebsd-arch@freebsd.org" <freebsd-arch@freebsd.org>, freebsd-current <freebsd-current@freebsd.org> Subject: RFC: DTrace probes for debugging or testing in userland programs Message-ID: <20161219204719.GE65993@freebsd-laptop> In-Reply-To: <CAJ-Vmon3%2BjMyfgBcVORyMoXX3JEAFCWtK2VPo9wWLN2hsS%2BrNA@mail.gmail.com> References: <20161220.043646.1181938468712455328.hrs@allbsd.org> <CAJ-Vmon3%2BjMyfgBcVORyMoXX3JEAFCWtK2VPo9wWLN2hsS%2BrNA@mail.gmail.com>
next in thread | previous in thread | raw e-mail | index | archive | help
--/Zw+/jwnNHcBRYYu Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable Hello, > I'd love to see a unified-ish logging API for FreeBSD applications. I > always end up reusing some C code I have here that I based on some > Squid style logging API in ages past. I could always polish it up and > put it up for review. > > I'm not a big fan of requiring dtrace to use it though. On a lot of > the embedded systems dtrace varies from "it's very big" through to "we > don't have enough RAM/flash to do this". DTrace indeed is very heavyweight, this could be an opt-in kind of thing compile time, hidden somewhere in the logging system employed. Personally, I think that keeping the diffs in the actual daemons to the bare minimum(1-2 LoC) should be one of the priorities. Additionally, the logging system should by default be lightweight, with compile time options to change the actual logging method(a simple log, DTrace, ...). > So although I like the sentiment, I don't think using dtrace for > program logging is the right answer. I like what apple did to wrap > the program logging stuff so people didn't just write their own > libraries (hi!) and so there's a unified-ish way to interact with > apple programs. I think we could do with that. This sounds like a pretty clean solution, and the logging method could be hid somewhere deep in there. I would personally like to see an option where I could pick DTrace for logging, as it allows for some interesting scripts to be written, however I tend to agree that this should not be the default. --=20 Best regards, Domagoj Stolfa. --/Zw+/jwnNHcBRYYu Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iQEzBAEBCAAdFiEEHQB+y96lmmv+IXofwxT+ikb0YU4FAlhYR1cACgkQwxT+ikb0 YU79Ugf+OUJw1oqxjYJ4pO3NO4KIhe85NSfyheTv7J98Z149v4TMmoirWjIJbcS1 3too/UvBwD3EmROzngD1dLS2kD8k3r8gCmIDh2eIA4S8FC/CtHIYJ1V9AETbxAhq vDWub7ndrTw0vjckoDDWLx8jQJmY17KmkZzUrM4RDizoTBQBZYcE2seBggM2mP7P 33vRsoguy2yABmbCTzg1q/LGQrYpGj5VrdbwyoeloxthQugqDb54yf2/fS2BfeS8 6xfZv11yh4/OhH7BIPMLSvWIT4Xw6rD6ng0XSJdjqmbkZsWNW3n22xTEgxjgd4sn U1rlTuRL7vnDFOD0KUhmVmmghrgvDg== =2mVa -----END PGP SIGNATURE----- --/Zw+/jwnNHcBRYYu--
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?20161219204719.GE65993>