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From: Markus Armbruster <armbru@redhat.com>
To: "Marc-André Lureau" <marcandre.lureau@gmail.com>
Cc: QEMU <qemu-devel@nongnu.org>, Michael Roth <mdroth@linux.vnet.ibm.com>
Subject: Re: [Qemu-devel] [RFC PATCH 15/32] tests/qapi-schema: Improve simple union coverage
Date: Thu, 05 Oct 2017 06:29:39 +0200	[thread overview]
Message-ID: <87wp4ai5e4.fsf@dusky.pond.sub.org> (raw)
In-Reply-To: <CAJ+F1CKSuJ2Zk6B4baESAdmM6RNeGFszJ1H41ZWxg+dXEcW7zQ@mail.gmail.com> (=?utf-8?Q?=22Marc-Andr=C3=A9?= Lureau"'s message of "Wed, 4 Oct 2017 14:02:54 +0200")

Marc-André Lureau <marcandre.lureau@gmail.com> writes:

> On Mon, Oct 2, 2017 at 5:25 PM, Markus Armbruster <armbru@redhat.com> wrote:
>> This demonstrates a bug in the lowering of simple unions: if more than
>> one schema uses the same built-in type T for a simple union member,
>> they all generate the same q_obj_T_wrapper into their qapi-types.h.
>> They clash when you include more than one schema's qapi-types.h.
>
> Ah, I don't remember seeing that when I splitted the schema in my
> qapi-if / conditional series.

Simple union members of built-in type are rare.  I spotted the problem
with options, then realized it's already possible with simple unions.

> Could it happen with non-built-in types ?

Yes, but multiple q_obj_T_wrapper can clash only when their T also
clash.  Name your types more wisely then.

>> Signed-off-by: Markus Armbruster <armbru@redhat.com>
>
> Reviewed-by: Marc-André Lureau <marcandre.lureau@redhat.com>

Thanks!

  reply	other threads:[~2017-10-05  4:29 UTC|newest]

Thread overview: 61+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-10-02 15:25 [Qemu-devel] [RFC PATCH 00/32] Command line QAPIfication Markus Armbruster
2017-10-02 15:25 ` [Qemu-devel] [RFC PATCH 01/32] tests/qapi-schema: Improve coverage of '@' Markus Armbruster
2017-10-04 10:37   ` Marc-André Lureau
2017-10-02 15:25 ` [Qemu-devel] [RFC PATCH 02/32] texi2pod: Support @verbatim environment Markus Armbruster
2017-10-05 14:58   ` Eric Blake
2017-10-06  5:24     ` Markus Armbruster
2017-10-06 13:40       ` Eric Blake
2017-10-02 15:25 ` [Qemu-devel] [RFC PATCH 03/32] qapi2texi: Fix for examples containing '@' Markus Armbruster
2017-10-04 10:45   ` Marc-André Lureau
2017-10-02 15:25 ` [Qemu-devel] [RFC PATCH 04/32] qapi2texi: Fix for '@' not followed by \w character Markus Armbruster
2017-10-04 10:47   ` Marc-André Lureau
2017-10-02 15:25 ` [Qemu-devel] [RFC PATCH 05/32] qapi2texi: Provide access to Texinfo markup Markus Armbruster
2017-10-02 15:25 ` [Qemu-devel] [RFC PATCH 06/32] qapi2texi: Drop | example markup Markus Armbruster
2017-10-02 15:25 ` [Qemu-devel] [RFC PATCH 07/32] qapi: Drop superfluous allow_optional=True Markus Armbruster
2017-10-04 10:52   ` Marc-André Lureau
2017-10-02 15:25 ` [Qemu-devel] [RFC PATCH 08/32] qapi: Simplify check_name() parameters Markus Armbruster
2017-10-04 10:54   ` Marc-André Lureau
2017-10-04 10:54   ` Marc-André Lureau
2017-10-02 15:25 ` [Qemu-devel] [RFC PATCH 09/32] qapi: check_type() parameter allow_optional is now unused, drop Markus Armbruster
2017-10-04 10:55   ` Marc-André Lureau
2017-10-02 15:25 ` [Qemu-devel] [RFC PATCH 10/32] qapi: Don't run generators twice Markus Armbruster
2017-10-04 11:04   ` Marc-André Lureau
2017-10-02 15:25 ` [Qemu-devel] [RFC PATCH 11/32] qapi: Drop the options to generate only .c or .h Markus Armbruster
2017-10-04 11:07   ` Marc-André Lureau
2017-10-02 15:25 ` [Qemu-devel] [RFC PATCH 12/32] qapi: Use argparse to parse command line arguments Markus Armbruster
2017-10-04 11:13   ` Marc-André Lureau
2017-10-02 15:25 ` [Qemu-devel] [RFC PATCH 13/32] qapi: Use argparse to open schema file Markus Armbruster
2017-10-04 11:18   ` Marc-André Lureau
2017-10-02 15:25 ` [Qemu-devel] [RFC PATCH 14/32] qapi: Rework generated code for built-in types Markus Armbruster
2017-10-04 11:52   ` Marc-André Lureau
2017-10-05  4:24     ` Markus Armbruster
2017-10-02 15:25 ` [Qemu-devel] [RFC PATCH 15/32] tests/qapi-schema: Improve simple union coverage Markus Armbruster
2017-10-04 12:02   ` Marc-André Lureau
2017-10-05  4:29     ` Markus Armbruster [this message]
2017-10-02 15:25 ` [Qemu-devel] [RFC PATCH 16/32] qapi: Factor out _make_implicit_wrapper_type() Markus Armbruster
2017-10-04 12:00   ` Marc-André Lureau
2017-10-02 15:25 ` [Qemu-devel] [RFC PATCH 17/32] qapi: Fix simple union lowering with multiple schemas Markus Armbruster
2017-10-04 12:04   ` Marc-André Lureau
2017-10-02 15:25 ` [Qemu-devel] [RFC PATCH 18/32] docs/devel/qapi-code-gen.txt: Rewrite section on schema syntax Markus Armbruster
2017-10-04 11:59   ` Marc-André Lureau
2017-10-02 15:25 ` [Qemu-devel] [RFC PATCH 19/32] qapi: Accept double-quoted strings Markus Armbruster
2017-10-04 11:58   ` Marc-André Lureau
2017-10-05  4:41     ` Markus Armbruster
2017-10-05 14:13       ` Marc-André Lureau
2017-10-06  5:29         ` Markus Armbruster
2017-10-05 15:16       ` Eric Blake
2017-10-06  5:27         ` Markus Armbruster
2017-10-02 15:25 ` [Qemu-devel] [RFC PATCH 20/32] qapi: Frontend for defining command line options Markus Armbruster
2017-10-02 15:25 ` [Qemu-devel] [RFC PATCH 21/32] qapi: Define QAPIOptionKind and QAPIOption automatically Markus Armbruster
2017-10-02 15:25 ` [Qemu-devel] [RFC PATCH 22/32] qapi: New helper c_string() Markus Armbruster
2017-10-02 15:25 ` [Qemu-devel] [RFC PATCH 23/32] qapi-options: Command line option backend Markus Armbruster
2017-10-02 15:25 ` [Qemu-devel] [RFC PATCH 24/32] qapi-options: Generate help string Markus Armbruster
2017-10-02 15:25 ` [Qemu-devel] [RFC PATCH 25/32] qapi-introspect: Include command line options information Markus Armbruster
2017-10-02 15:25 ` [Qemu-devel] [RFC PATCH 26/32] qapi2texi: " Markus Armbruster
2017-10-02 15:25 ` [Qemu-devel] [RFC PATCH 27/32] os-posix: Drop misleading comment Markus Armbruster
2017-10-04 12:10   ` Marc-André Lureau
2017-10-02 15:25 ` [Qemu-devel] [RFC PATCH 28/32] vl: QAPIfy command line option definition Markus Armbruster
2017-10-02 15:25 ` [Qemu-devel] [RFC PATCH 29/32] qapi/options: QAPIfy --echr argument type Markus Armbruster
2017-10-02 15:25 ` [Qemu-devel] [RFC PATCH 30/32] qapi/options: QAPIfy --watchdog-action " Markus Armbruster
2017-10-02 15:25 ` [Qemu-devel] [RFC PATCH 31/32] qapi/options: QAPIfy --blockdev " Markus Armbruster
2017-10-02 15:25 ` [Qemu-devel] [RFC PATCH 32/32] qapi/options: QAPIfy --add-fd " Markus Armbruster

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