From: Eric Blake <eblake@redhat.com>
To: Markus Armbruster <armbru@redhat.com>
Cc: marcandre.lureau@redhat.com, qemu-devel@nongnu.org,
Michael Roth <mdroth@linux.vnet.ibm.com>
Subject: Re: [Qemu-devel] [PATCH v9 08/37] qapi: Track all failures between visit_start/stop
Date: Wed, 20 Jan 2016 10:15:59 -0700 [thread overview]
Message-ID: <569FC0CF.3040304@redhat.com> (raw)
In-Reply-To: <87k2n4p79t.fsf@blackfin.pond.sub.org>
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On 01/20/2016 09:03 AM, Markus Armbruster wrote:
> Eric Blake <eblake@redhat.com> writes:
>
>> 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.
>>
>> |+ if (!*obj) {
>
> err is clear here.
>
>> |+ goto out_obj;
>> |+ }
>> |+ visit_type_GuestAgentCommandInfo_fields(v, obj, &err);
>> |+out_obj:
>> |+ error_propagate(errp, err);
>> |+ err = NULL;
>
> If we come from goto out_obj, these two lines are no-ops.
I could move the label, if desired...
>
>> |+ visit_end_struct(v, &err);
>> |+out:
>> | error_propagate(errp, err);
>> | }
>
> gen_visit_union(), the other generator of visit_start_struct(), already
> does it this way. It generates additional goto out_obj, so the
> placement of out_obj makes more sense there. I guess we want to place
> it in the same spot here to facilitate unifying the two.
...but as you observed, the unification in 31 is a bit easier with it
placed identically. Maybe a commit message comment is in order.
--
Eric Blake eblake redhat com +1-919-301-3266
Libvirt virtualization library http://libvirt.org
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next prev parent reply other threads:[~2016-01-20 17:16 UTC|newest]
Thread overview: 128+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-01-19 16:10 [Qemu-devel] [PATCH v9 00/37] qapi visitor cleanups (post-introspection cleanups subset E) Eric Blake
2016-01-19 16:10 ` [Qemu-devel] [PATCH v9 01/37] qobject: Document more shortcomings in our number handling Eric Blake
2016-01-20 9:02 ` Markus Armbruster
2016-01-20 15:55 ` Eric Blake
2016-01-21 6:21 ` Markus Armbruster
2016-01-21 17:12 ` Eric Blake
2016-01-21 17:29 ` Daniel P. Berrange
2016-01-19 16:10 ` [Qemu-devel] [PATCH v9 02/37] qapi: Avoid use of misnamed DO_UPCAST() Eric Blake
2016-01-20 10:04 ` Markus Armbruster
2016-01-20 15:59 ` Eric Blake
2016-01-21 6:22 ` Markus Armbruster
2016-01-19 16:10 ` [Qemu-devel] [PATCH v9 03/37] qapi: Drop dead dealloc visitor variable Eric Blake
2016-01-19 16:10 ` [Qemu-devel] [PATCH v9 04/37] hmp: Improve use of qapi visitor Eric Blake
2016-01-20 13:05 ` Markus Armbruster
2016-01-19 16:10 ` [Qemu-devel] [PATCH v9 05/37] vl: " Eric Blake
2016-01-20 13:43 ` Markus Armbruster
2016-01-20 16:18 ` Eric Blake
2016-01-21 6:45 ` Markus Armbruster
2016-01-19 16:10 ` [Qemu-devel] [PATCH v9 06/37] balloon: " Eric Blake
2016-01-20 14:09 ` Markus Armbruster
2016-01-19 16:10 ` [Qemu-devel] [PATCH v9 07/37] qapi: Improve generated event " Eric Blake
2016-01-20 15:19 ` Markus Armbruster
2016-01-20 17:10 ` Eric Blake
2016-01-21 7:16 ` Markus Armbruster
2016-01-26 23:40 ` Eric Blake
2016-01-28 22:51 ` Eric Blake
2016-01-19 16:10 ` [Qemu-devel] [PATCH v9 08/37] qapi: Track all failures between visit_start/stop Eric Blake
2016-01-20 16:03 ` Markus Armbruster
2016-01-20 17:15 ` Eric Blake [this message]
2016-01-21 7:19 ` Markus Armbruster
2016-01-19 16:10 ` [Qemu-devel] [PATCH v9 09/37] qapi: Prefer type_int64 over type_int in visitors Eric Blake
2016-01-20 17:07 ` Markus Armbruster
2016-01-19 16:10 ` [Qemu-devel] [PATCH v9 10/37] qapi: Make all visitors supply uint64 callbacks Eric Blake
2016-01-20 17:29 ` Markus Armbruster
2016-01-20 18:10 ` Eric Blake
2016-01-21 8:56 ` Markus Armbruster
2016-01-21 17:22 ` Eric Blake
2016-01-19 16:10 ` [Qemu-devel] [PATCH v9 11/37] qapi: Consolidate visitor small integer callbacks Eric Blake
2016-01-20 17:34 ` Markus Armbruster
2016-01-20 18:17 ` Eric Blake
2016-01-21 9:05 ` Markus Armbruster
2016-01-19 16:10 ` [Qemu-devel] [PATCH v9 12/37] qapi: Don't cast Enum* to int* Eric Blake
2016-01-20 18:08 ` Markus Armbruster
2016-01-20 19:58 ` Eric Blake
2016-01-21 9:08 ` Markus Armbruster
2016-01-19 16:10 ` [Qemu-devel] [PATCH v9 13/37] qom: Use typedef for Visitor Eric Blake
2016-01-19 16:10 ` [Qemu-devel] [PATCH v9 14/37] qapi: Swap visit_* arguments for consistent 'name' placement Eric Blake
2016-01-20 18:28 ` Markus Armbruster
2016-01-19 16:10 ` [Qemu-devel] [PATCH v9 15/37] qom: Swap 'name' next to visitor in ObjectPropertyAccessor Eric Blake
2016-01-20 18:49 ` Markus Armbruster
2016-01-20 20:54 ` Eric Blake
2016-01-21 9:18 ` Markus Armbruster
2016-01-21 9:46 ` Kevin Wolf
2016-01-21 10:04 ` Markus Armbruster
2016-01-19 16:10 ` [Qemu-devel] [PATCH v9 16/37] qapi: Swap 'name' in visit_* callbacks to match public API Eric Blake
2016-01-20 18:55 ` Markus Armbruster
2016-01-20 21:01 ` Eric Blake
2016-01-21 9:19 ` Markus Armbruster
2016-01-19 16:10 ` [Qemu-devel] [PATCH v9 17/37] qapi: Drop unused 'kind' for struct/enum visit Eric Blake
2016-01-20 18:59 ` Markus Armbruster
2016-01-19 16:10 ` [Qemu-devel] [PATCH v9 18/37] qapi: Drop unused error argument for list and implicit struct Eric Blake
2016-01-20 19:03 ` Markus Armbruster
2016-01-20 21:58 ` Eric Blake
2016-01-21 9:47 ` Markus Armbruster
2016-01-19 16:10 ` [Qemu-devel] [PATCH v9 19/37] qmp: Fix reference-counting of qnull on empty output visit Eric Blake
2016-01-21 10:27 ` Markus Armbruster
2016-01-21 13:19 ` Markus Armbruster
2016-01-19 16:10 ` [Qemu-devel] [PATCH v9 20/37] qmp: Don't abuse stack to track qmp-output root Eric Blake
2016-01-21 13:58 ` Markus Armbruster
2016-01-29 3:06 ` Eric Blake
2016-01-19 16:10 ` [Qemu-devel] [PATCH v9 21/37] qapi: Document visitor interfaces, add assertions Eric Blake
2016-01-21 20:08 ` Markus Armbruster
2016-01-22 0:30 ` Eric Blake
2016-01-22 12:18 ` Markus Armbruster
2016-02-10 0:23 ` Eric Blake
2016-02-10 7:38 ` Markus Armbruster
2016-01-19 16:10 ` [Qemu-devel] [PATCH v9 22/37] qapi: Add visit_type_null() visitor Eric Blake
2016-01-22 17:00 ` Markus Armbruster
2016-01-19 16:10 ` [Qemu-devel] [PATCH v9 23/37] qmp: Support explicit null during input visit Eric Blake
2016-01-22 17:12 ` Markus Armbruster
2016-02-01 23:52 ` Eric Blake
2016-01-19 16:10 ` [Qemu-devel] [PATCH v9 24/37] qmp: Tighten output visitor rules Eric Blake
2016-01-22 19:11 ` Markus Armbruster
2016-01-19 16:10 ` [Qemu-devel] [PATCH v9 25/37] spapr_drc: Expose 'null' in qom-get when there is no fdt Eric Blake
2016-01-22 19:15 ` Markus Armbruster
2016-01-19 16:10 ` [Qemu-devel] [PATCH v9 26/37] qapi: Simplify excess input reporting in input visitors Eric Blake
2016-01-22 19:24 ` Markus Armbruster
2016-01-22 19:37 ` Eric Blake
2016-01-25 9:27 ` Markus Armbruster
2016-01-25 10:43 ` Laszlo Ersek
2016-01-27 13:54 ` [Qemu-devel] [PATCH 0/3] qapi-visit: Unify struct and union visit Markus Armbruster
2016-01-27 13:54 ` [Qemu-devel] [PATCH 1/3] qapi-visit: Simplify how we visit common union members Markus Armbruster
2016-01-27 21:48 ` Eric Blake
2016-01-27 13:54 ` [Qemu-devel] [PATCH 2/3] qapi-visit: Clean up code generated around visit_end_union() Markus Armbruster
2016-01-27 14:02 ` Eric Blake
2016-01-27 14:46 ` Markus Armbruster
2016-01-27 13:54 ` [Qemu-devel] [PATCH 3/3] qapi-visit: Unify struct and union visit Markus Armbruster
2016-01-19 16:10 ` [Qemu-devel] [PATCH v9 27/37] qapi: Add type.is_empty() helper Eric Blake
2016-01-25 14:15 ` Markus Armbruster
2016-01-19 16:10 ` [Qemu-devel] [PATCH v9 28/37] qapi: Fix command with named empty argument type Eric Blake
2016-01-25 15:03 ` Markus Armbruster
2016-01-19 16:10 ` [Qemu-devel] [PATCH v9 29/37] qapi: Eliminate empty visit_type_FOO_fields Eric Blake
2016-01-25 17:04 ` Markus Armbruster
2016-02-17 4:57 ` Eric Blake
2016-01-19 16:10 ` [Qemu-devel] [PATCH v9 30/37] qapi: Canonicalize missing object to :empty Eric Blake
2016-01-25 19:04 ` Markus Armbruster
2016-01-26 16:29 ` Markus Armbruster
2016-01-27 8:00 ` Markus Armbruster
2016-01-19 16:10 ` [Qemu-devel] [PATCH v9 31/37] qapi-visit: Unify struct and union visit Eric Blake
2016-01-27 14:12 ` Markus Armbruster
2016-01-19 16:10 ` [Qemu-devel] [PATCH v9 32/37] qapi: Rework deallocation of partial struct Eric Blake
2016-01-27 16:41 ` Markus Armbruster
2016-01-19 16:10 ` [Qemu-devel] [PATCH v9 33/37] qapi: Split visit_end_struct() into pieces Eric Blake
2016-01-27 17:20 ` Markus Armbruster
2016-01-19 16:10 ` [Qemu-devel] [PATCH v9 34/37] qapi: Simplify semantics of visit_next_list() Eric Blake
2016-01-28 13:37 ` Markus Armbruster
2016-01-19 16:10 ` [Qemu-devel] [PATCH v9 35/37] qapi: Change visit_type_FOO() to no longer return partial objects Eric Blake
2016-01-28 15:24 ` Markus Armbruster
2016-01-28 17:05 ` Eric Blake
2016-01-29 12:03 ` Markus Armbruster
2016-01-29 15:13 ` Eric Blake
2016-01-19 16:10 ` [Qemu-devel] [PATCH v9 36/37] RFC: qapi: Adjust layout of FooList types Eric Blake
2016-01-28 15:34 ` Markus Armbruster
2016-01-28 17:23 ` Eric Blake
2016-01-29 8:19 ` Markus Armbruster
2016-01-19 16:10 ` [Qemu-devel] [PATCH v9 37/37] qapi: Update docs to match recent generator changes Eric Blake
2016-01-28 15:37 ` Markus Armbruster
2016-01-28 17:56 ` [Qemu-devel] [PATCH v9 00/37] qapi visitor cleanups (post-introspection cleanups subset E) Markus Armbruster
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