From: "Philippe Mathieu-Daudé" <philmd@redhat.com>
To: Thomas Huth <thuth@redhat.com>,
qemu-devel@nongnu.org, Paolo Bonzini <pbonzini@redhat.com>,
Richard Henderson <richard.henderson@linaro.org>,
Claudio Fontana <cfontana@suse.de>
Cc: "Daniel P. Berrangé" <berrange@redhat.com>,
"Eduardo Habkost" <ehabkost@redhat.com>,
"Juan Quintela" <quintela@redhat.com>,
"Markus Armbruster" <armbru@redhat.com>,
"Cameron Esfahani" <dirty@apple.com>,
"Dr. David Alan Gilbert" <dgilbert@redhat.com>,
"Roman Bolshakov" <r.bolshakov@yadro.com>,
"Wenchao Wang" <wenchao.wang@intel.com>,
"Sunil Muthuswamy" <sunilmut@microsoft.com>,
"Colin Xu" <colin.xu@intel.com>
Subject: Re: [PATCH for-6.1 4/4] configure: Poison all current target-specific #defines
Date: Thu, 15 Apr 2021 10:34:48 +0200 [thread overview]
Message-ID: <529f4022-aa17-2b41-294d-a293b0461690@redhat.com> (raw)
In-Reply-To: <20210414112004.943383-5-thuth@redhat.com>
+Richard/Claudio
On 4/14/21 1:20 PM, Thomas Huth wrote:
> We are generating a lot of target-specific defines in the *-config-devices.h
> and *-config-target.h files. Using them in common code is wrong and leads
> to very subtle bugs since a "#ifdef CONFIG_SOMETHING" is not working there
> as expected. To avoid these issues, we are already poisoning many of the
> macros in include/exec/poison.h - but it's cumbersome to maintain this
> list manually. Thus let's generate an additional list of poisoned macros
> automatically from the current config switches - this should give us a
> much better test coverage via the different CI configurations.
>
> Note that CONFIG_TCG (which is also defined in config-host.h) and
> CONFIG_USER_ONLY are special, so we have to filter these out.
I know if we poison CONFIG_TCG, almost nothing build, but I fail to
see how it is different from the other accelerators. I suppose in the
future (maybe with Claudio's effort) we could have it not special.
> Signed-off-by: Thomas Huth <thuth@redhat.com>
> ---
> Makefile | 2 +-
> configure | 5 +++++
> include/exec/poison.h | 2 ++
> 3 files changed, 8 insertions(+), 1 deletion(-)
>
> diff --git a/Makefile b/Makefile
> index bcbbec71a1..4cab10a2a4 100644
> --- a/Makefile
> +++ b/Makefile
> @@ -213,7 +213,7 @@ qemu-%.tar.bz2:
>
> distclean: clean
> -$(quiet-@)test -f build.ninja && $(NINJA) $(NINJAFLAGS) -t clean -g || :
> - rm -f config-host.mak config-host.h*
> + rm -f config-host.mak config-host.h* config-poison.h
> rm -f tests/tcg/config-*.mak
> rm -f config-all-disas.mak config.status
> rm -f roms/seabios/config.mak roms/vgabios/config.mak
> diff --git a/configure b/configure
> index 4f374b4889..a0f0601e7e 100755
> --- a/configure
> +++ b/configure
> @@ -6440,6 +6440,11 @@ if test -n "${deprecated_features}"; then
> echo " features: ${deprecated_features}"
> fi
>
Maybe a one line comment (but since it is obvious, I don't mind):
# Filter out CONFIG_TCG and CONFIG_USER_ONLY which are special
> +sed -n -e '/CONFIG_TCG/d' -e '/CONFIG_USER_ONLY/d' \
> + -e '/^#define / { s///; s/ .*//; s/^/#pragma GCC poison /p; }' \
> + *-config-devices.h *-config-target.h | \
> + sort -u > config-poison.h
> +
Reviewed-by: Philippe Mathieu-Daudé <philmd@redhat.com>
next prev parent reply other threads:[~2021-04-15 8:36 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-04-14 11:20 [PATCH for-6.1 0/4] Poison more CONFIG switches Thomas Huth
2021-04-14 11:20 ` [PATCH for-6.1 1/4] include/sysemu: Poison all accelerator CONFIG switches in common code Thomas Huth
2021-04-14 16:56 ` Philippe Mathieu-Daudé
2021-04-14 11:20 ` [PATCH for-6.1 2/4] migration: Move populate_vfio_info() into a separate file Thomas Huth
2021-04-14 12:22 ` Dr. David Alan Gilbert
2021-04-14 12:33 ` Philippe Mathieu-Daudé
2021-05-03 6:04 ` Thomas Huth
2021-04-14 11:20 ` [PATCH for-6.1 3/4] qapi/qom.json: Do not use CONFIG_VIRTIO_CRYPTO in common code Thomas Huth
2021-04-14 13:55 ` Markus Armbruster
2021-04-15 6:15 ` Thomas Huth
2021-04-15 7:44 ` Markus Armbruster
2021-04-15 8:03 ` Thomas Huth
2021-04-14 11:20 ` [PATCH for-6.1 4/4] configure: Poison all current target-specific #defines Thomas Huth
2021-04-15 8:34 ` Philippe Mathieu-Daudé [this message]
2021-04-15 11:21 ` Thomas Huth
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