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Tue, 10 Sep 2024 10:40:22 -0700 (PDT) From: Pierrick Bouvier To: qemu-devel@nongnu.org Cc: Wainer dos Santos Moschetta , Richard Henderson , Paolo Bonzini , Ilya Leoshkevich , =?UTF-8?q?Alex=20Benn=C3=A9e?= , David Hildenbrand , =?UTF-8?q?Marc-Andr=C3=A9=20Lureau?= , =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= , kvm@vger.kernel.org, Thomas Huth , Marcelo Tosatti , =?UTF-8?q?Daniel=20P=2E=20Berrang=C3=A9?= , qemu-s390x@nongnu.org, Beraldo Leal , Pierrick Bouvier Subject: [PATCH v3 1/3] meson: hide tsan related warnings Date: Tue, 10 Sep 2024 10:40:11 -0700 Message-Id: <20240910174013.1433331-2-pierrick.bouvier@linaro.org> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20240910174013.1433331-1-pierrick.bouvier@linaro.org> References: <20240910174013.1433331-1-pierrick.bouvier@linaro.org> MIME-Version: 1.0 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=2607:f8b0:4864:20::102b; envelope-from=pierrick.bouvier@linaro.org; helo=mail-pj1-x102b.google.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, 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: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @linaro.org) X-ZM-MESSAGEID: 1725990146072116600 When building with gcc-12 -fsanitize=3Dthread, gcc reports some constructions not supported with tsan. Found on debian stable. qemu/include/qemu/atomic.h:36:52: error: =E2=80=98atomic_thread_fence=E2=80= =99 is not supported with =E2=80=98-fsanitize=3Dthread=E2=80=99 [-Werror=3D= tsan] 36 | #define smp_mb() ({ barrier(); __atomic_thread_= fence(__ATOMIC_SEQ_CST); }) | ^~~~~~~~~~~~~~~~= ~~~~~~~~~~~~~~~~~~~~~~~ Signed-off-by: Pierrick Bouvier --- meson.build | 10 +++++++++- 1 file changed, 9 insertions(+), 1 deletion(-) diff --git a/meson.build b/meson.build index fbda17c987e..8a587bd52cc 100644 --- a/meson.build +++ b/meson.build @@ -504,7 +504,15 @@ if get_option('tsan') prefix: '#include ') error('Cannot enable TSAN due to missing fiber annotation interface') endif - qemu_cflags =3D ['-fsanitize=3Dthread'] + qemu_cflags + tsan_warn_suppress =3D [] + # gcc (>=3D11) will report constructions not supported by tsan: + # "error: =E2=80=98atomic_thread_fence=E2=80=99 is not supported with = =E2=80=98-fsanitize=3Dthread=E2=80=99" + # https://gcc.gnu.org/gcc-11/changes.html + # However, clang does not support this warning and this triggers an erro= r. + if cc.has_argument('-Wno-tsan') + tsan_warn_suppress =3D ['-Wno-tsan'] + endif + qemu_cflags =3D ['-fsanitize=3Dthread'] + tsan_warn_suppress + qemu_cfla= gs qemu_ldflags =3D ['-fsanitize=3Dthread'] + qemu_ldflags endif =20 --=20 2.39.2