From owner-freebsd-hackers@freebsd.org Sat Aug 13 17:22:18 2016 Return-Path: Delivered-To: freebsd-hackers@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 945B0BB8A7E for ; Sat, 13 Aug 2016 17:22:18 +0000 (UTC) (envelope-from pfg@FreeBSD.org) Received: from nm21.bullet.mail.bf1.yahoo.com (nm21.bullet.mail.bf1.yahoo.com [98.139.212.180]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id 4FCB11EB1 for ; Sat, 13 Aug 2016 17:22:17 +0000 (UTC) (envelope-from pfg@FreeBSD.org) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=yahoo.com; s=s2048; t=1471108936; bh=5imIJcDAjvnuspcHhJsmbDulOk2D+DUaNl+k81/kVTc=; h=From:Subject:To:Cc:Date:From:Subject; b=GsPBDS7avPz4+DvlKMZ94pwGb9M7cQzDyl7MK0ws/ULWInfimUvRk/RT6G6VDzOcxKnfj4GpWsReYr8OC1QWzXTV7jyBkkyCcM7KPkDHxmzyI51ef+nVnCPGYFMHlFY34DbYI5njsnV9gSUZyxJ13iPF2wPdjGhjzlg/RDf6mZ5zMU4nVf7vT1OhOsC2a2z2JdSRkyhZBW6Pe1WQae431fzU6aY3TZ5rc4aC6w1LxncqWT/Gu9US2y4rGUJaHZVZE7OT8vLX0KAUt40NXnsI+R0v3ke3qmCeJ06xApaMi4Ba/cw917HQA155YLNXUZdBBjnyT3wo8rSkVQlcyBTbwQ== Received: from [66.196.81.172] by nm21.bullet.mail.bf1.yahoo.com with NNFMP; 13 Aug 2016 17:22:16 -0000 Received: from [98.139.211.207] by tm18.bullet.mail.bf1.yahoo.com with NNFMP; 13 Aug 2016 17:22:16 -0000 Received: from [127.0.0.1] by smtp216.mail.bf1.yahoo.com with NNFMP; 13 Aug 2016 17:22:16 -0000 X-Yahoo-Newman-Id: 923567.6808.bm@smtp216.mail.bf1.yahoo.com X-Yahoo-Newman-Property: ymail-3 X-YMail-OSG: LJjdjpEVM1nMed7RHTWAxTJDs_DlXLiXMZgHzLJcC8b26Go pZu62brv_VdHvn4jOeMwGp6_tDSFSIX8sUntbKyD59Iwu8Z_iyc0F_Mzs_li wl5XjqJ2lZKX4b91F1qvqbB8dP_khZFs_NxTswCsb4hkMwNeScQ9ALia7LuP ErWm_lSG578kDa.fOBYdpEO05lH0pJtbkDIv90ftII7Nm9fr96O5.UhgwQLC tnBrjhcPzPkKgfu4NPT4SPna_FwmZuwqxkIwFxXtrTVz30Rol.Xs34P9nCVM TXYuE_5qtTG4REDAK2s8BD5Xf9es4j7vWQXFT83sC7_aPgzNVUYuaF7yGAg3 xpLu3xri_ZU_O.VBkztLGywAx0DU7j7TfRmGr.SFCSvfoPTNLET43x0Hd63i 4yUneMZJCsLb7Huf3scY0Kqa6iG5_JDdIngfXr14tBArwHBvnQRpCXnrGVVy 0YOwwJy8g.QjjbE2YWgxt4yr55tP6iYBJiywHLi4eq_pIdKSjcz6x1a1Ebfc oUKlySN4HPxfFSvXUyJAQP6AnWvsn4vK6dlGw8VW9SFq6.w-- X-Yahoo-SMTP: xcjD0guswBAZaPPIbxpWwLcp9Unf From: Pedro Giffuni Subject: Re: How to get better debugging for the kernel. To: FreeBSD Hackers Cc: Gordon Ross Message-ID: <7b58509a-556b-0784-56c5-00378a1fc5e2@FreeBSD.org> Date: Sat, 13 Aug 2016 12:22:15 -0500 User-Agent: Mozilla/5.0 (X11; FreeBSD amd64; rv:45.0) Gecko/20100101 Thunderbird/45.2.0 MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit X-BeenThere: freebsd-hackers@freebsd.org X-Mailman-Version: 2.1.22 Precedence: list List-Id: Technical Discussions relating to FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 13 Aug 2016 17:22:18 -0000 Gordon Ross wrote: > I heard a rumor someone might be working on a port of illumos "mdb". > Anyone know if that's true, and how far along it went? > FWIW, I heard the same rumor. > We depend heavily upon this tool for production support; > so much that I'm not sure how we'd live without it. There is interest, and I have seen some attempt at work on it however it is not something likely to bear much fruit because mdb knows nothing about dwarf; AFAICT it knows only about stabs, which we don't use at all. Also, Oracle did make some Dtrace enhancements in upstream gdb that would be good to port. Pedro.