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bh=V06JyM5hB4aiy1XWsA8HEuhWvMq+bzeBj4OjUp9zVmU=; b=AZtF5IWwPq1ScFIc3tFptxQkHmqcL7m1Zh2ZKgo1ECnedDWaq3EQ0pxiO7ts0igfOEWLZ9 Qx6GtPIYbEQobpPeKMnU3M8uT+yjh7jUsI7zUxn6GPKuo3ZEJ6tpSGZaVjTrhSfIvt0sVd JVNkA6i3KoW6AAar9GOQ8Ute5ugANss= X-MC-Unique: CU5fzaZuPay4UZlxQJ_pbQ-1 From: Thomas Huth To: qemu-devel@nongnu.org, Peter Maydell Subject: [PULL 17/20] configure: Poison all current target-specific #defines Date: Fri, 14 May 2021 14:15:15 +0200 Message-Id: <20210514121518.832729-18-thuth@redhat.com> In-Reply-To: <20210514121518.832729-1-thuth@redhat.com> References: <20210514121518.832729-1-thuth@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.13 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=thuth@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=170.10.133.124; envelope-from=thuth@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -34 X-Spam_score: -3.5 X-Spam_bar: --- X-Spam_report: (-3.5 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.699, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_MSPIKE_H4=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= , =?UTF-8?q?Alex=20Benn=C3=A9e?= Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: fail (Header signature does not verify) 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. Message-Id: <20210414112004.943383-5-thuth@redhat.com> Reviewed-by: Philippe Mathieu-Daud=C3=A9 Signed-off-by: Thomas Huth --- Makefile | 2 +- configure | 7 +++++++ include/exec/poison.h | 2 ++ 3 files changed, 10 insertions(+), 1 deletion(-) diff --git a/Makefile b/Makefile index bcbbec71a1..4cab10a2a4 100644 --- a/Makefile +++ b/Makefile @@ -213,7 +213,7 @@ qemu-%.tar.bz2: =20 distclean: clean -$(quiet-@)test -f build.ninja && $(NINJA) $(NINJAFLAGS) -t clean -g || : - rm -f config-host.mak config-host.h* + rm -f config-host.mak config-host.h* config-poison.h rm -f tests/tcg/config-*.mak rm -f config-all-disas.mak config.status rm -f roms/seabios/config.mak roms/vgabios/config.mak diff --git a/configure b/configure index f05ca143b3..0e4233fd8a 100755 --- a/configure +++ b/configure @@ -6473,6 +6473,13 @@ if test -n "${deprecated_features}"; then echo " features: ${deprecated_features}" fi =20 +# Create list of config switches that should be poisoned in common code... +# but 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 + # Save the configure command line for later reuse. cat <config.status #!/bin/sh diff --git a/include/exec/poison.h b/include/exec/poison.h index a527def5f0..7ad4ad18e8 100644 --- a/include/exec/poison.h +++ b/include/exec/poison.h @@ -4,6 +4,8 @@ #ifndef HW_POISON_H #define HW_POISON_H =20 +#include "config-poison.h" + #pragma GCC poison TARGET_I386 #pragma GCC poison TARGET_X86_64 #pragma GCC poison TARGET_AARCH64 --=20 2.27.0