From patchwork Tue Feb 9 11:37:47 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Markus Armbruster X-Patchwork-Id: 8260411 Return-Path: X-Original-To: patchwork-qemu-devel@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork2.web.kernel.org (Postfix) with ESMTP id 4751DBEEE5 for ; Tue, 9 Feb 2016 11:46:32 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id A5FF82026C for ; Tue, 9 Feb 2016 11:46:31 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id E49AA20114 for ; Tue, 9 Feb 2016 11:46:30 +0000 (UTC) Received: from localhost ([::1]:54634 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1aT6kY-0005wv-7W for patchwork-qemu-devel@patchwork.kernel.org; Tue, 09 Feb 2016 06:46:30 -0500 Received: from eggs.gnu.org ([2001:4830:134:3::10]:34180) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1aT6cV-0007q0-H3 for qemu-devel@nongnu.org; Tue, 09 Feb 2016 06:38:12 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1aT6cU-00030W-H3 for qemu-devel@nongnu.org; Tue, 09 Feb 2016 06:38:11 -0500 Received: from mx1.redhat.com ([209.132.183.28]:42528) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1aT6cU-00030A-93 for qemu-devel@nongnu.org; Tue, 09 Feb 2016 06:38:10 -0500 Received: from int-mx11.intmail.prod.int.phx2.redhat.com (int-mx11.intmail.prod.int.phx2.redhat.com [10.5.11.24]) by mx1.redhat.com (Postfix) with ESMTPS id DF7548E236 for ; Tue, 9 Feb 2016 11:38:09 +0000 (UTC) Received: from blackfin.pond.sub.org (ovpn-116-34.ams2.redhat.com [10.36.116.34]) by int-mx11.intmail.prod.int.phx2.redhat.com (8.14.4/8.14.4) with ESMTP id u19Bc85m006257 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=NO); Tue, 9 Feb 2016 06:38:09 -0500 Received: by blackfin.pond.sub.org (Postfix, from userid 1000) id 282C5300BD81; Tue, 9 Feb 2016 12:38:04 +0100 (CET) From: Markus Armbruster To: qemu-devel@nongnu.org Date: Tue, 9 Feb 2016 12:37:47 +0100 Message-Id: <1455017883-25867-16-git-send-email-armbru@redhat.com> In-Reply-To: <1455017883-25867-1-git-send-email-armbru@redhat.com> References: <1455017883-25867-1-git-send-email-armbru@redhat.com> X-Scanned-By: MIMEDefang 2.68 on 10.5.11.24 X-detected-operating-system: by eggs.gnu.org: GNU/Linux 3.x X-Received-From: 209.132.183.28 Subject: [Qemu-devel] [PULL 15/31] qapi: Track all failures between visit_start/stop X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org X-Spam-Status: No, score=-6.9 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: Eric Blake Inside the generated code between visit_start_struct() and visit_end_struct(), we were blindly setting the error into the caller's errp parameter. But a future patch to split visit_end_struct() will require that we take action based on whether an error has occurred, which requires us to track all actions through a local err. Rewrite the visits to be more in line with the other generated calls. Generated code changes look like: | visit_start_struct(v, (void **)obj, "Abort", name, sizeof(Abort), &err); |- if (!err) { |- if (*obj) { |- visit_type_Abort_fields(v, obj, errp); |- } |- visit_end_struct(v, &err); |+ if (err) { |+ goto out; | } |+ if (!*obj) { |+ goto out_obj; |+ } |+ visit_type_Abort_fields(v, obj, &err); |+ error_propagate(errp, err); |+ err = NULL; |+out_obj: |+ visit_end_struct(v, &err); |+out: | error_propagate(errp, err); | } Signed-off-by: Eric Blake Message-Id: <1454075341-13658-12-git-send-email-eblake@redhat.com> Signed-off-by: Markus Armbruster --- scripts/qapi-visit.py | 18 ++++++++++++------ 1 file changed, 12 insertions(+), 6 deletions(-) diff --git a/scripts/qapi-visit.py b/scripts/qapi-visit.py index b93690b..ec16e36 100644 --- a/scripts/qapi-visit.py +++ b/scripts/qapi-visit.py @@ -2,7 +2,7 @@ # QAPI visitor generator # # Copyright IBM, Corp. 2011 -# Copyright (C) 2014-2015 Red Hat, Inc. +# Copyright (C) 2014-2016 Red Hat, Inc. # # Authors: # Anthony Liguori @@ -123,12 +123,18 @@ void visit_type_%(c_name)s(Visitor *v, %(c_name)s **obj, const char *name, Error Error *err = NULL; visit_start_struct(v, (void **)obj, "%(name)s", name, sizeof(%(c_name)s), &err); - if (!err) { - if (*obj) { - visit_type_%(c_name)s_fields(v, obj, errp); - } - visit_end_struct(v, &err); + if (err) { + goto out; } + if (!*obj) { + goto out_obj; + } + visit_type_%(c_name)s_fields(v, obj, &err); + error_propagate(errp, err); + err = NULL; +out_obj: + visit_end_struct(v, &err); +out: error_propagate(errp, err); } ''',