From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 107217 invoked by alias); 19 Aug 2018 16:40:40 -0000 Mailing-List: contact gdb-help@sourceware.org; run by ezmlm Precedence: bulk List-Id: List-Subscribe: List-Archive: List-Post: List-Help: , Sender: gdb-owner@sourceware.org Received: (qmail 107197 invoked by uid 89); 19 Aug 2018 16:40:39 -0000 Authentication-Results: sourceware.org; auth=none X-Spam-SWARE-Status: No, score=-3.0 required=5.0 tests=AWL,BAYES_00,RCVD_IN_DNSWL_NONE,SPF_HELO_PASS autolearn=ham version=3.3.2 spammy=Files, peace X-HELO: gateway21.websitewelcome.com Received: from gateway21.websitewelcome.com (HELO gateway21.websitewelcome.com) (192.185.45.2) by sourceware.org (qpsmtpd/0.93/v0.84-503-g423c35a) with ESMTP; Sun, 19 Aug 2018 16:40:37 +0000 Received: from cm16.websitewelcome.com (cm16.websitewelcome.com [100.42.49.19]) by gateway21.websitewelcome.com (Postfix) with ESMTP id 939D2400CF5D2 for ; Sun, 19 Aug 2018 11:40:36 -0500 (CDT) Received: from box5379.bluehost.com ([162.241.216.53]) by cmsmtp with SMTP id rQkmfx5kSaSeyrQkmfSztB; Sun, 19 Aug 2018 11:40:36 -0500 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=tromey.com; s=default; h=Content-Type:MIME-Version:Message-ID:In-Reply-To:Date: References:Subject:Cc:To:From:Sender:Reply-To:Content-Transfer-Encoding: Content-ID:Content-Description:Resent-Date:Resent-From:Resent-Sender: Resent-To:Resent-Cc:Resent-Message-ID:List-Id:List-Help:List-Unsubscribe: List-Subscribe:List-Post:List-Owner:List-Archive; bh=Htx7I4oSkZhQT7j+PbK499dTIUqaQpfFsDNOJvBityo=; b=SyFps9n9gfZdBDGPiG0HHT0UVP jWVJhVwB6EGnP8kPUPwjbrill2QOgUIPukCH8vF3SHA+HE6mvPMfJB70JsiOeRfrgyw/dcAGja/LF GAb2Zpd1nrNcUeqGQu4kCJlLb; Received: from 75-166-85-72.hlrn.qwest.net ([75.166.85.72]:51690 helo=bapiya) by box5379.bluehost.com with esmtpsa (TLSv1.2:ECDHE-RSA-AES256-GCM-SHA384:256) (Exim 4.91) (envelope-from ) id 1frQkm-002Wii-9V; Sun, 19 Aug 2018 11:40:36 -0500 From: Tom Tromey To: Eli Zaretskii Cc: gdb@sourceware.org Subject: Re: Using separate debug info files with Windows DLLs References: <83h8jrg65m.fsf@gnu.org> Date: Sun, 19 Aug 2018 16:40:00 -0000 In-Reply-To: <83h8jrg65m.fsf@gnu.org> (Eli Zaretskii's message of "Sat, 18 Aug 2018 16:23:33 +0300") Message-ID: <8736vagvi5.fsf@tromey.com> User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/26.1.50 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain X-SW-Source: 2018-08/txt/msg00041.txt.bz2 >>>>> "Eli" == Eli Zaretskii writes: Eli> Does the "debug link" method work with Windows DLLs produces by MinGW Eli> GCC and GNU Binutils? I think so. Eli> The "Separate Debug Files" node of the GDB manual talks only about Eli> executables, and doesn't mention shared libraries. If those methods Eli> are supposed to work with shared libraries in general, and Windows Eli> DLLs in particular, then I wonder (a) would the Windows loader live in Eli> peace with the additional .gnu_debuglink section that needs to be put Eli> there, and (b) when will GDB load the debug info using this method? I don't know the answer to (a), but for (b), as far as I know, coff_symfile_read is used for both executables and libraries; and at the end of coff_symfile_read it has code to read the debug link and find the separate debug file. This is done if the main objfile doesn't have any debug info: /* Try to add separate debug file if no symbols table found. */ if (!objfile_has_partial_symbols (objfile)) { [...] I wonder if the build-id approach could be extended to COFF somehow. build-ids are better because they don't require the slow CRC computation. Tom