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=-8.5 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, NUMERIC_HTTP_ADDR,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED, USER_AGENT_GIT 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 E2EF8C64E7D for ; Tue, 17 Nov 2020 13:29:29 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 8263F21534 for ; Tue, 17 Nov 2020 13:29:29 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=kernel.org header.i=@kernel.org header.b="s1+YMshN" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731583AbgKQN3X (ORCPT ); Tue, 17 Nov 2020 08:29:23 -0500 Received: from mail.kernel.org ([198.145.29.99]:37952 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1731576AbgKQN3W (ORCPT ); Tue, 17 Nov 2020 08:29:22 -0500 Received: from localhost (83-86-74-64.cable.dynamic.v4.ziggo.nl [83.86.74.64]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 4485A2078D; Tue, 17 Nov 2020 13:29:21 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1605619761; bh=ha6bZhqTCYO40+kGQ3S6CrIeRW3n9o6h2ac7PtqCpRU=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=s1+YMshN7jiDFFgEBZvDSqi1BOmu587v3MGD64IoQXvyIwsOxSeWaK1iYKvYHT/tg NJKp4G1jokMPKS66n4ryGZEVghBgeWCQKJ33gtz4uV7K74IYMQAgPnxPPqecC0eGVh cmGduHQlJWCEXCI4KBvZKRWZj9CF1kqa+pHzZ+YI= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Adrian Hunter , Ian Rogers , Jiri Olsa , Namhyung Kim , Arnaldo Carvalho de Melo , Tapas Kundu Subject: [PATCH 5.4 148/151] perf scripting python: Avoid declaring function pointers with a visibility attribute Date: Tue, 17 Nov 2020 14:06:18 +0100 Message-Id: <20201117122128.630029567@linuxfoundation.org> X-Mailer: git-send-email 2.29.2 In-Reply-To: <20201117122121.381905960@linuxfoundation.org> References: <20201117122121.381905960@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Arnaldo Carvalho de Melo commit d0e7b0c71fbb653de90a7163ef46912a96f0bdaf upstream. To avoid this: util/scripting-engines/trace-event-python.c: In function 'python_start_script': util/scripting-engines/trace-event-python.c:1595:2: error: 'visibility' attribute ignored [-Werror=attributes] 1595 | PyMODINIT_FUNC (*initfunc)(void); | ^~~~~~~~~~~~~~ That started breaking when building with PYTHON=python3 and these gcc versions (I haven't checked with the clang ones, maybe it breaks there as well): # export PERF_TARBALL=http://192.168.86.5/perf/perf-5.9.0.tar.xz # dm fedora:33 fedora:rawhide 1 107.80 fedora:33 : Ok gcc (GCC) 10.2.1 20201005 (Red Hat 10.2.1-5), clang version 11.0.0 (Fedora 11.0.0-1.fc33) 2 92.47 fedora:rawhide : Ok gcc (GCC) 10.2.1 20201016 (Red Hat 10.2.1-6), clang version 11.0.0 (Fedora 11.0.0-1.fc34) # Avoid that by ditching that 'initfunc' function pointer with its: #define Py_EXPORTED_SYMBOL _attribute_ ((visibility ("default"))) #define PyMODINIT_FUNC Py_EXPORTED_SYMBOL PyObject* And just call PyImport_AppendInittab() at the end of the ifdef python3 block with the functions that were being attributed to that initfunc. Cc: Adrian Hunter Cc: Ian Rogers Cc: Jiri Olsa Cc: Namhyung Kim Signed-off-by: Arnaldo Carvalho de Melo Signed-off-by: Tapas Kundu Signed-off-by: Greg Kroah-Hartman --- tools/perf/util/scripting-engines/trace-event-python.c | 7 ++----- 1 file changed, 2 insertions(+), 5 deletions(-) --- a/tools/perf/util/scripting-engines/trace-event-python.c +++ b/tools/perf/util/scripting-engines/trace-event-python.c @@ -1587,7 +1587,6 @@ static void _free_command_line(wchar_t * static int python_start_script(const char *script, int argc, const char **argv) { struct tables *tables = &tables_global; - PyMODINIT_FUNC (*initfunc)(void); #if PY_MAJOR_VERSION < 3 const char **command_line; #else @@ -1602,20 +1601,18 @@ static int python_start_script(const cha FILE *fp; #if PY_MAJOR_VERSION < 3 - initfunc = initperf_trace_context; command_line = malloc((argc + 1) * sizeof(const char *)); command_line[0] = script; for (i = 1; i < argc + 1; i++) command_line[i] = argv[i - 1]; + PyImport_AppendInittab(name, initperf_trace_context); #else - initfunc = PyInit_perf_trace_context; command_line = malloc((argc + 1) * sizeof(wchar_t *)); command_line[0] = Py_DecodeLocale(script, NULL); for (i = 1; i < argc + 1; i++) command_line[i] = Py_DecodeLocale(argv[i - 1], NULL); + PyImport_AppendInittab(name, PyInit_perf_trace_context); #endif - - PyImport_AppendInittab(name, initfunc); Py_Initialize(); #if PY_MAJOR_VERSION < 3