From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 65084 invoked by alias); 13 Jan 2020 20:54:15 -0000 Mailing-List: contact systemtap-help@sourceware.org; run by ezmlm Precedence: bulk List-Id: List-Subscribe: List-Post: List-Help: , Sender: systemtap-owner@sourceware.org Received: (qmail 65076 invoked by uid 89); 13 Jan 2020 20:54:15 -0000 Authentication-Results: sourceware.org; auth=none X-Spam-SWARE-Status: No, score=-4.0 required=5.0 tests=AWL,BAYES_00,RCVD_IN_DNSWL_NONE autolearn=ham version=3.3.1 spammy=capable, vehicle, engineered, enhancing X-HELO: us-smtp-1.mimecast.com Received: from us-smtp-delivery-1.mimecast.com (HELO us-smtp-1.mimecast.com) (205.139.110.120) by sourceware.org (qpsmtpd/0.93/v0.84-503-g423c35a) with ESMTP; Mon, 13 Jan 2020 20:54:14 +0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1578948852; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=wT/uloTgG1xLJ2P8mC1JcB2deQuEMddwm8vD9m+1vMA=; b=bsuvnAww0Q6smSBsAOICMR5jo0cW6eDREQHvgGDfZ+mjVnqZAiltmCKVglZKsSJj0uXIvs LYenvMPZXkQ8DnIckOca3J6y4R511bdgkfOx6/f+AubPplErJpAXe9VJPF++XnozifP2ba gxz/XvAAG587tofkGbUbtIs3X+51kdc= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-280-ZtQDBaDcMuWkKhHLcA0img-1; Mon, 13 Jan 2020 15:54:09 -0500 Received: from smtp.corp.redhat.com (int-mx06.intmail.prod.int.phx2.redhat.com [10.5.11.16]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id 2916E100551D; Mon, 13 Jan 2020 20:54:08 +0000 (UTC) Received: from redhat.com (ovpn-116-36.phx2.redhat.com [10.3.116.36]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 0B1445C1B0; Mon, 13 Jan 2020 20:54:08 +0000 (UTC) Received: from fche by redhat.com with local (Exim 4.92) (envelope-from ) id 1ir6is-0004DY-Kq; Mon, 13 Jan 2020 15:54:06 -0500 Date: Mon, 13 Jan 2020 20:54:00 -0000 From: "Frank Ch. Eigler" To: Craig Ringer Cc: systemtap@sourceware.org Subject: Re: SDTs with data types and argument names Message-ID: <20200113205406.GE6118@redhat.com> References: <87blrcfox9.fsf@redhat.com> MIME-Version: 1.0 In-Reply-To: User-Agent: Mutt/1.12.0 (2019-05-25) X-Mimecast-Spam-Score: 0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: quoted-printable Content-Disposition: inline X-SW-Source: 2020-q1/txt/msg00007.txt Hi - > > Yeah. I believe there was a kernel-bpf-oriented group last year, who > > were speculating extending sdt.h in a similarly motivated way. >=20 > Good to know. Any idea who may've been involved? It'd be good to > collaborate and not duplicate work or explore a dead-end already followed. https://web.archive.org/web/20190528152614/http://vger.kernel.org/lpc-bpf20= 18.html#session-11 "enhancing user defined tracepoints" (h/t serhei) (btw, where did vger itself go??? did it merge with Decker and disappeared into another dimension?) > Indeed. And the latter option is hairy for complex and portable software: > you must get exactly the right header version, but you must also ensure y= ou > have any number of preprocessor macros etc set precisely the same. There > can be header inclusion order considerations and more. I'm very reluctant > to use the automated header processing features. Those provisos are all valid, yet it turns out to be useful & capable a lot of the time. If there is a "-devel" level packaged set of headers, they should be well enough engineered to let this work. > [...] I don't know of any way to ask gcc/gdb/binutils/etc to retain > a subset of debuginfo in an executable when it's being stripped, and > I doubt that'd be popular or accepted anyway. [...] See "BTF" and "CTF" for two efforts to keep some wee subsets of debuginfo on the installation medium. And see debuginfod.systemtap.org :-) for a distribution vehicle for full mainstream debuginfo. - FChE