From owner-freebsd-dtrace@freebsd.org Thu May 18 20:45:41 2017 Return-Path: Delivered-To: freebsd-dtrace@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id C9756D7308A for ; Thu, 18 May 2017 20:45:41 +0000 (UTC) (envelope-from domagoj.stolfa@gmail.com) Received: from mail-wm0-x22a.google.com (mail-wm0-x22a.google.com [IPv6:2a00:1450:400c:c09::22a]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (Client CN "smtp.gmail.com", Issuer "Google Internet Authority G2" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 5B8B87D0 for ; Thu, 18 May 2017 20:45:41 +0000 (UTC) (envelope-from domagoj.stolfa@gmail.com) Received: by mail-wm0-x22a.google.com with SMTP id d127so65562836wmf.0 for ; Thu, 18 May 2017 13:45:41 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=date:from:to:cc:subject:message-id:references:mime-version :content-disposition:in-reply-to:user-agent; bh=IMq9P+Y8Fx92xta7HwSr3F9F43eQh3EsoREz+cXDZJY=; b=tO3w/U+XaycUrBzl+IPHBxjjvQkPejHRgCWHi5ywtOhpMwLePRlgh9Wemg6Xd853G1 HLCX2ACqU8b84+yuvhHdfCamlqbCzUtm7nZYkKhlv232YVMGzrPdEIU8Fcnh/oWVWDXj VE4COXPfRcdSBjIhEhLab0HyY2EUvoH+xhl+HUTd+TcASjveeawga+u7HosSaHjSHSpQ 7i09RSeo40ytWXVCTIi5EddG21Zh7sv7+BpHnwFGGlflEaWBuiYNAR8MbmDdKB0zDfdx eAqjv3tAkgBr+2E0wZ/90SQ2UwzeCJ2hyl+fHQAUAz6vmXg71/YMuVMtBCq5qytHShW9 +u0w== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:from:to:cc:subject:message-id:references :mime-version:content-disposition:in-reply-to:user-agent; bh=IMq9P+Y8Fx92xta7HwSr3F9F43eQh3EsoREz+cXDZJY=; b=EuU3eonHmrmint6vthzXaTcqXhE2Jq43Ra4a4YTccBI4/JsdaOwUItG/YwwYXPOu4V hr+ihFVgYdzy2OPwyDUETuj87BPRnOyydhMzg9T+YTrmPm8jP5zymX6S8lpK4kiw3wic F1fuzdQEBCfYNc2RkfTzqq9qv5gTMvo4XTbnHZZ5KN2SMZaNCavJo6tRV8HDpt7sLi3k sFREhcl6QTMna15bokMKQFNwZTo3gUmzDpqqyE2D+sVu7qT62TBif0atbw1TbchWYGUh VGKN7OECuamhF+maa3ZJytQwofD2i9FF28JZ+aIymPsyAb+n5j+FTvMsGsjHX6beIavD 0iog== X-Gm-Message-State: AODbwcBeE7yFDdVG4+cqOWyGU2eAR9qjYZ2PBCYFSnwXH0BNbcw8/Gcl 786IrH45obChBw== X-Received: by 10.28.61.215 with SMTP id k206mr4497715wma.133.1495140339783; Thu, 18 May 2017 13:45:39 -0700 (PDT) Received: from wraith (224-14.dsl.iskon.hr. [89.164.224.14]) by smtp.gmail.com with ESMTPSA id x126sm7942454wme.12.2017.05.18.13.45.38 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Thu, 18 May 2017 13:45:39 -0700 (PDT) Date: Thu, 18 May 2017 22:45:34 +0200 From: Domagoj Stolfa To: Samuel Lepetit Cc: Andreas Longwitz , freebsd-dtrace@freebsd.org Subject: Re: fbt:kernel:breadn_flags:entry): invalid address (0x0) in action #7 Message-ID: <20170518204534.GA37126@wraith> References: <591E01F5.8080208@incore.de> <6A020677-BC76-41E1-8372-10B7962F4EDE@apple.com> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha256; protocol="application/pgp-signature"; boundary="EeQfGwPcQSOJBaQU" Content-Disposition: inline In-Reply-To: <6A020677-BC76-41E1-8372-10B7962F4EDE@apple.com> User-Agent: Mutt/1.8.2 (2017-04-18) X-BeenThere: freebsd-dtrace@freebsd.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: "A discussion list for developers working on DTrace in FreeBSD." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 18 May 2017 20:45:41 -0000 --EeQfGwPcQSOJBaQU Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable Hello, > I suspect the easiest way here is just to check that your credential in a= rgs[6] is non-null in a predicate. yes, you would likely have to enable the probe twice -- once with a non-null argument and once with a null argument (if required). --=20 Best regards, Domagoj Stolfa --EeQfGwPcQSOJBaQU Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iQEzBAEBCAAdFiEEHQB+y96lmmv+IXofwxT+ikb0YU4FAlkeB+wACgkQwxT+ikb0 YU6DZAf8CPuPmhPMpQLFa0Nj4889VpxO5EDf0r48kEG8f0DGP7IMGS/CQakZrRx3 fVSKi0jXUU4lhcZG04xz6QZHAj4SYLMgJHLAfJsrChdu2icfWFQRS6WD1IGJ6TZ+ b1h+D55fKwHHJIS4EOlWLxVii3wfhOqWhQZhSRZ7M//PIdhIXjlvk38eh3xbL/8t PVC3Zeof0mAB8ZexCkJXLh99v3wSTFN7DeLclV3CPAzqadcvx7GpWH9hWMI2fKjX J+hxG/Z39qKZ77ydbPFGZYjYMqJBEgG7PfZuXzKmjg+Ql5kYRGiomJvYbuxIkDCk Fx0d7dAgPuMEE8Jse/6s2w8YXjFLhw== =hV8p -----END PGP SIGNATURE----- --EeQfGwPcQSOJBaQU--