From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-2.5 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_PASS,USER_AGENT_MUTT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 2C4E4C43381 for ; Mon, 4 Mar 2019 13:53:56 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id EE7F9205C9 for ; Mon, 4 Mar 2019 13:53:55 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727044AbfCDNxy (ORCPT ); Mon, 4 Mar 2019 08:53:54 -0500 Received: from mx1.redhat.com ([209.132.183.28]:50830 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726095AbfCDNxx (ORCPT ); Mon, 4 Mar 2019 08:53:53 -0500 Received: from smtp.corp.redhat.com (int-mx01.intmail.prod.int.phx2.redhat.com [10.5.11.11]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id CDB898552E; Mon, 4 Mar 2019 13:53:53 +0000 (UTC) Received: from krava (unknown [10.43.17.112]) by smtp.corp.redhat.com (Postfix) with SMTP id C00066013C; Mon, 4 Mar 2019 13:53:51 +0000 (UTC) Date: Mon, 4 Mar 2019 14:53:51 +0100 From: Jiri Olsa To: Song Liu Cc: netdev@vger.kernel.org, linux-kernel@vger.kernel.org, ast@kernel.org, daniel@iogearbox.net, kernel-team@fb.com, peterz@infradead.org, acme@redhat.com, jolsa@kernel.org, namhyung@kernel.org Subject: Re: [PATCH v5 perf,bpf 12/15] perf, bpf: enable annotation of bpf program Message-ID: <20190304135351.GL19809@krava> References: <20190228050643.958685-1-songliubraving@fb.com> <20190228050643.958685-13-songliubraving@fb.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20190228050643.958685-13-songliubraving@fb.com> User-Agent: Mutt/1.10.1 (2018-07-13) X-Scanned-By: MIMEDefang 2.79 on 10.5.11.11 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.28]); Mon, 04 Mar 2019 13:53:53 +0000 (UTC) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, Feb 27, 2019 at 09:06:40PM -0800, Song Liu wrote: SNIP > + fflush(s); > + do { > + const struct bpf_line_info *linfo = NULL; > + struct disasm_line *dl; > + size_t prev_buf_size; > + const char *srcline; > + u64 addr; > + > + addr = pc + ((u64 *)(info_linear->info.jited_ksyms))[sub_id]; > + count = disassemble(pc, &info); > + > + if (prog_linfo) > + linfo = bpf_prog_linfo__lfind_addr_func(prog_linfo, > + addr, sub_id, > + nr_skip); > + > + if (linfo && btf) { > + srcline = btf__name_by_offset(btf, linfo->line_off); > + nr_skip++; > + } else > + srcline = NULL; > + > + fprintf(s, "\n"); > + prev_buf_size = buf_size; > + fflush(s); > + > + if (!opts->hide_src_code && srcline) { > + args->offset = -1; why's the offset not needed in here? jirka > + args->line = strdup(srcline); > + args->line_nr = 0; > + args->ms.sym = sym; > + dl = disasm_line__new(args); > + if (dl) { > + annotation_line__add(&dl->al, > + ¬es->src->source); > + } > + } SNIP