From owner-freebsd-current@freebsd.org  Fri Dec  6 00:24:57 2019
Return-Path: <owner-freebsd-current@freebsd.org>
Delivered-To: freebsd-current@mailman.nyi.freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1])
 by mailman.nyi.freebsd.org (Postfix) with ESMTP id E72621B0E83
 for <freebsd-current@mailman.nyi.freebsd.org>;
 Fri,  6 Dec 2019 00:24:57 +0000 (UTC)
 (envelope-from mmacy@freebsd.org)
Received: from mailman.nyi.freebsd.org (mailman.nyi.freebsd.org
 [IPv6:2610:1c1:1:606c::50:13])
 by mx1.freebsd.org (Postfix) with ESMTP id 47TYJ95x3jz3JpN
 for <freebsd-current@freebsd.org>; Fri,  6 Dec 2019 00:24:57 +0000 (UTC)
 (envelope-from mmacy@freebsd.org)
Received: by mailman.nyi.freebsd.org (Postfix)
 id C9BC81B0E81; Fri,  6 Dec 2019 00:24:57 +0000 (UTC)
Delivered-To: current@mailman.nyi.freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1])
 by mailman.nyi.freebsd.org (Postfix) with ESMTP id C876E1B0E80
 for <current@mailman.nyi.freebsd.org>; Fri,  6 Dec 2019 00:24:57 +0000 (UTC)
 (envelope-from mmacy@freebsd.org)
Received: from smtp.freebsd.org (smtp.freebsd.org [96.47.72.83])
 (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)
 server-signature RSA-PSS (4096 bits)
 client-signature RSA-PSS (4096 bits) client-digest SHA256)
 (Client CN "smtp.freebsd.org",
 Issuer "Let's Encrypt Authority X3" (verified OK))
 by mx1.freebsd.org (Postfix) with ESMTPS id 47TYJ94wLDz3JpL;
 Fri,  6 Dec 2019 00:24:57 +0000 (UTC)
 (envelope-from mmacy@freebsd.org)
Received: from mail-lf1-f52.google.com (mail-lf1-f52.google.com
 [209.85.167.52])
 (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits))
 (Client CN "smtp.gmail.com", Issuer "GTS CA 1O1" (verified OK))
 (Authenticated sender: mmacy)
 by smtp.freebsd.org (Postfix) with ESMTPSA id 50F5E1732C;
 Fri,  6 Dec 2019 00:24:57 +0000 (UTC)
 (envelope-from mmacy@freebsd.org)
Received: by mail-lf1-f52.google.com with SMTP id r14so3903803lfm.5;
 Thu, 05 Dec 2019 16:24:57 -0800 (PST)
X-Gm-Message-State: APjAAAXToi16GZQuHBI5oovUIPsrEBEPO+VP+F4IcMn7+BicoqTRPoV+
 y5W1SiOATKXT57xXJgnoGQUIicCU+Nwtnyn9apQ=
X-Google-Smtp-Source: APXvYqzI4KDr9uz4XktMN+jj0S1Gy4Bjzmp4esxtzL6OpC1LC+wKiTY0IFoFtD2NMa+CZp2q/BtNMJP2/iD/0stQRrI=
X-Received: by 2002:a19:7d04:: with SMTP id y4mr2578030lfc.111.1575591895852; 
 Thu, 05 Dec 2019 16:24:55 -0800 (PST)
MIME-Version: 1.0
References: <b233b3e5-e2ac-8dce-5552-43bac9f8a5cc@FreeBSD.org>
 <C839BCA7-1FA9-4E0F-B03F-59B8E5FA6FFF@freebsd.org>
 <CAOtMX2iv+_Q6kbOqUmcjpafoym0Yx9OU9p3LKt_mpYf7eEzrNw@mail.gmail.com>
 <CAPyFy2DSmW=eztZ5-HnynXDvrCuaHiJfTXZadyPDCQOFxumnMg@mail.gmail.com>
In-Reply-To: <CAPyFy2DSmW=eztZ5-HnynXDvrCuaHiJfTXZadyPDCQOFxumnMg@mail.gmail.com>
From: Matthew Macy <mmacy@freebsd.org>
Date: Thu, 5 Dec 2019 16:24:44 -0800
X-Gmail-Original-Message-ID: <CAPrugNojGqDYxL-kHiEGhn81XViAp_eA68kYbsPkpW1dn9Dv9g@mail.gmail.com>
Message-ID: <CAPrugNojGqDYxL-kHiEGhn81XViAp_eA68kYbsPkpW1dn9Dv9g@mail.gmail.com>
Subject: Re: kernel module code coverage
To: Ed Maste <emaste@freebsd.org>
Cc: Alan Somers <asomers@freebsd.org>, Michael Tuexen <tuexen@freebsd.org>, 
 "slavash@freebsd.org" <slavash@freebsd.org>, current <current@freebsd.org>
Content-Type: text/plain; charset="UTF-8"
X-BeenThere: freebsd-current@freebsd.org
X-Mailman-Version: 2.1.29
Precedence: list
List-Id: Discussions about the use of FreeBSD-current
 <freebsd-current.freebsd.org>
List-Unsubscribe: <https://lists.freebsd.org/mailman/options/freebsd-current>, 
 <mailto:freebsd-current-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-current/>
List-Post: <mailto:freebsd-current@freebsd.org>
List-Help: <mailto:freebsd-current-request@freebsd.org?subject=help>
List-Subscribe: <https://lists.freebsd.org/mailman/listinfo/freebsd-current>, 
 <mailto:freebsd-current-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Fri, 06 Dec 2019 00:24:58 -0000

On Thu, Dec 5, 2019 at 8:38 AM Ed Maste <emaste@freebsd.org> wrote:
>
> > > Have you looked into /dev/kcov. This is used by SYZKALLER for getting
> > > coverage information from the kernel.
> > >
> > That's part of Matt Macy's gcov project, right?.
>
> No, /dev/kcov is independent of, and predates, Matt Macy's work. It
> provides broadly the same sort of information, but not using the same
> interface.

GCOV also depends on GCC - probably limiting its potential use cases
largely to vendor CI.