From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:42292) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1aLYrw-0004UF-Ay for qemu-devel@nongnu.org; Tue, 19 Jan 2016 11:11:02 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1aLYrs-00020k-4h for qemu-devel@nongnu.org; Tue, 19 Jan 2016 11:10:56 -0500 Received: from mx1.redhat.com ([209.132.183.28]:48700) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1aLYrs-00020U-05 for qemu-devel@nongnu.org; Tue, 19 Jan 2016 11:10:52 -0500 From: Eric Blake Date: Tue, 19 Jan 2016 09:10:16 -0700 Message-Id: <1453219845-30939-9-git-send-email-eblake@redhat.com> In-Reply-To: <1453219845-30939-1-git-send-email-eblake@redhat.com> References: <1453219845-30939-1-git-send-email-eblake@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable Subject: [Qemu-devel] [PATCH v9 08/37] qapi: Track all failures between visit_start/stop List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org Cc: marcandre.lureau@redhat.com, armbru@redhat.com, Michael Roth 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: |@@ -42,12 +42,18 @@ void visit_type_GuestAgentCommandInfo(Vi | Error *err =3D NULL; | | visit_start_struct(v, (void **)obj, "GuestAgentCommandInfo", name, = sizeof(GuestAgentCommandInfo), &err); |- if (!err) { |- if (*obj) { |- visit_type_GuestAgentCommandInfo_fields(v, obj, errp); |- } |- visit_end_struct(v, &err); |+ if (err) { |+ goto out; | } |+ if (!*obj) { |+ goto out_obj; |+ } |+ visit_type_GuestAgentCommandInfo_fields(v, obj, &err); |+out_obj: |+ error_propagate(errp, err); |+ err =3D NULL; |+ visit_end_struct(v, &err); |+out: | error_propagate(errp, err); | } Signed-off-by: Eric Blake Reviewed-by: Marc-Andr=C3=A9 Lureau --- v9: enhance commit message v8: no change v7: place earlier in series v6: based loosely on v5 7/46, but mostly a rewrite to get the last generated code in the same form as all the others, so that the later conversion to split visit_check_struct() will be easier --- scripts/qapi-visit.py | 16 +++++++++++----- 1 file changed, 11 insertions(+), 5 deletions(-) diff --git a/scripts/qapi-visit.py b/scripts/qapi-visit.py index b93690b..4a4f67d 100644 --- a/scripts/qapi-visit.py +++ b/scripts/qapi-visit.py @@ -123,12 +123,18 @@ void visit_type_%(c_name)s(Visitor *v, %(c_name)s *= *obj, const char *name, Error Error *err =3D NULL; visit_start_struct(v, (void **)obj, "%(name)s", name, sizeof(%(c_nam= e)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); +out_obj: + error_propagate(errp, err); + err =3D NULL; + visit_end_struct(v, &err); +out: error_propagate(errp, err); } ''', --=20 2.5.0