From owner-freebsd-hackers@FreeBSD.ORG Sun Mar 20 03:08:11 2011 Return-Path: Delivered-To: freebsd-hackers@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id CB6E2106564A for ; Sun, 20 Mar 2011 03:08:11 +0000 (UTC) (envelope-from forandom@gmail.com) Received: from mail-iy0-f182.google.com (mail-iy0-f182.google.com [209.85.210.182]) by mx1.freebsd.org (Postfix) with ESMTP id 879B18FC21 for ; Sun, 20 Mar 2011 03:08:11 +0000 (UTC) Received: by iyj12 with SMTP id 12so6328534iyj.13 for ; Sat, 19 Mar 2011 20:08:11 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:sender:in-reply-to:references:date :x-google-sender-auth:message-id:subject:from:to:cc:content-type; bh=iKW5TYHysq8PhBG9HS/ygJHX9qYAF+5SAmeIAbq2xG8=; b=jufhxg78t6GfUHt1eT3qJrgxZ9+k1bXTDnJV+YgPyPPvxEK5Y3Mq3Af9vReiQLb/lh LQ5AopUW5AkjcXhRw/AEpOwBijSWODqUny7pvz40Y80wCbHJ5TWB4JgsIyr+f+5QYj7j 0FSjizZTBHDgeYMuZSlN9cFMp6LYrLmFKD7GE= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:sender:in-reply-to:references:date :x-google-sender-auth:message-id:subject:from:to:cc:content-type; b=dKN/1UL6i3cW3ZDgc7j7C5bLAvtcthfNuVjgkn+kkAcvE/IGD4ZLjSL5HZ2gLTCSNE IbRa+oaFeRawKIZT+hxhlW6cZN/xPLCDqdye/dr5bt8WnKxb2w2QW7kR1RrtO0sy0u3m wYoXRuDfPnWeUpQvi6kLRD6kgWlVLx5MumKak= MIME-Version: 1.0 Received: by 10.231.193.233 with SMTP id dv41mr2612667ibb.186.1300590490983; Sat, 19 Mar 2011 20:08:10 -0700 (PDT) Sender: forandom@gmail.com Received: by 10.231.144.201 with HTTP; Sat, 19 Mar 2011 20:08:10 -0700 (PDT) In-Reply-To: <20110319174115.GA33282@dchagin.static.corbina.ru> References: <20110319174115.GA33282@dchagin.static.corbina.ru> Date: Sun, 20 Mar 2011 11:08:10 +0800 X-Google-Sender-Auth: D3sJ71A70VfbMe6JirGuyZvf_IU Message-ID: From: Xingxing Pan To: Chagin Dmitry Content-Type: text/plain; charset=ISO-8859-1 Cc: freebsd-hackers@freebsd.org Subject: Re: GSoC'11: DWARF2 call frame information X-BeenThere: freebsd-hackers@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Technical Discussions relating to FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sun, 20 Mar 2011 03:08:11 -0000 2011/3/20 Chagin Dmitry : > On Sun, Mar 20, 2011 at 12:36:39AM +0800, Xingxing Pan wrote: >> Hi, everyone. >> >> I'm a student interested in the project "DWARF2 call frame >> information" for Summer of Code 2011. >> I'd like to know which compiler I will work on to add DWARF2 support. >> This project is not tagged by "suggested". Will it be ok to choose it >> as the target? >> > > hi Xingxing, > > You should carefully reread the proposed idea. Especially in the > "A debug kernel is not able to show stack traces with cross > exceptions anymore. This is because we do not emit any dwarf2 > call frame information for any assembler code, since gdb switched > to the dwarf2 format" part. > > And, of course, this work is very important for the community. So, IMO, > it will be ok as the target :) > Thank you. > > -- > Have fun! > chd > Hi chd, Thank you for your reply. I thought the dwarf2 call frame information was generated by the toolchain. That's why I care about the states of the compiler. I'm not quite understand the proposed idea. Could you show me more details of the project? I really appreciate your support. Thank you. Xingxing Pan