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Mon, 29 Sep 2025 08:49:57 -0700 (PDT) X-Google-Smtp-Source: AGHT+IG39NgJaEGvGG8aqTB4Gzd3IeTq2Z4iKh6aPJuTq1virL/sLNIB/BE9XZK3/aJG78p7jKX5ew== X-Received: by 2002:a17:907:72cf:b0:b3f:1120:82a5 with SMTP id a640c23a62f3a-b413a7e70d9mr106818266b.20.1759160996550; Mon, 29 Sep 2025 08:49:56 -0700 (PDT) From: Paolo Bonzini To: qemu-devel@nongnu.org Cc: Tanish Desai , Stefan Hajnoczi , Manos Pitsidianakis , Mads Ynddal , =?UTF-8?q?Daniel=20P=20=2E=20Berrang=C3=A9?= , Zhao Liu , qemu-rust@nongnu.org Subject: [PATCH 06/16] tracetool: add CHECK_TRACE_EVENT_GET_STATE Date: Mon, 29 Sep 2025 17:49:28 +0200 Message-ID: <20250929154938.594389-7-pbonzini@redhat.com> X-Mailer: git-send-email 2.51.0 In-Reply-To: <20250929154938.594389-1-pbonzini@redhat.com> References: <20250929154938.594389-1-pbonzini@redhat.com> MIME-Version: 1.0 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=pbonzini@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -25 X-Spam_score: -2.6 X-Spam_bar: -- X-Spam_report: (-2.6 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.513, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H5=0.001, RCVD_IN_MSPIKE_WL=0.001, RCVD_IN_VALIDITY_RPBL_BLOCKED=0.001, RCVD_IN_VALIDITY_SAFE_BLOCKED=0.001, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001 autolearn=unavailable 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 @redhat.com) X-ZM-MESSAGEID: 1759161135108116600 Content-Type: text/plain; charset="utf-8" From: Tanish Desai Add a new attribute CHECK_TRACE_EVENT_GET_STATE to the backends. When present and True, the code generated by the generate function is wrapped in a conditional that checks whether the event is enabled; this removes the need for repeating the same conditional in multiple backends. Signed-off-by: Tanish Desai Reviewed-by: Stefan Hajnoczi Signed-off-by: Paolo Bonzini --- scripts/tracetool/backend/__init__.py | 39 ++++++++++++++++++--------- scripts/tracetool/format/h.py | 11 +++++--- 2 files changed, 35 insertions(+), 15 deletions(-) diff --git a/scripts/tracetool/backend/__init__.py b/scripts/tracetool/back= end/__init__.py index bf91e443e99..9109a783c72 100644 --- a/scripts/tracetool/backend/__init__.py +++ b/scripts/tracetool/backend/__init__.py @@ -19,11 +19,15 @@ Backend attributes ------------------ =20 -=3D=3D=3D=3D=3D=3D=3D=3D=3D =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D -Attribute Description -=3D=3D=3D=3D=3D=3D=3D=3D=3D =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D -PUBLIC If exists and is set to 'True', the backend is considered "publi= c". -=3D=3D=3D=3D=3D=3D=3D=3D=3D =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D +=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D +Attribute Description +=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D +PUBLIC If exists and is set to 'True', the backend is + considered "public". +CHECK_TRACE_EVENT_GET_STATE If exists and is set to 'True', the backend-sp= ecific + code inside the tracepoint is emitted within an + ``if trace_event_get_state()`` conditional. +=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D= =3D=3D=3D=3D=3D=3D =20 =20 Backend functions @@ -101,22 +105,33 @@ class Wrapper: def __init__(self, backends, format): self._backends =3D [backend.replace("-", "_") for backend in backe= nds] self._format =3D format.replace("-", "_") + self.check_trace_event_get_state =3D False for backend in self._backends: assert exists(backend) assert tracetool.format.exists(self._format) + for backend in self.backend_modules(): + check_trace_event_get_state =3D getattr(backend, "CHECK_TRACE_= EVENT_GET_STATE", False) + self.check_trace_event_get_state =3D self.check_trace_event_ge= t_state or check_trace_event_get_state =20 - def _run_function(self, name, *args, **kwargs): + def backend_modules(self): for backend in self._backends: - func =3D tracetool.try_import("tracetool.backend." + backend, - name % self._format, None)[1] - if func is not None: - func(*args, **kwargs) + module =3D tracetool.try_import("tracetool.backend." + backen= d)[1] + if module is not None: + yield module + + def _run_function(self, name, *args, check_trace_event_get_state=3DNon= e, **kwargs): + for backend in self.backend_modules(): + func =3D getattr(backend, name % self._format, None) + if func is not None and \ + (check_trace_event_get_state is None or + check_trace_event_get_state =3D=3D getattr(backend, 'CHEC= K_TRACE_EVENT_GET_STATE', False)): + func(*args, **kwargs) =20 def generate_begin(self, events, group): self._run_function("generate_%s_begin", events, group) =20 - def generate(self, event, group): - self._run_function("generate_%s", event, group) + def generate(self, event, group, check_trace_event_get_state=3DNone): + self._run_function("generate_%s", event, group, check_trace_event_= get_state=3Dcheck_trace_event_get_state) =20 def generate_backend_dstate(self, event, group): self._run_function("generate_%s_backend_dstate", event, group) diff --git a/scripts/tracetool/format/h.py b/scripts/tracetool/format/h.py index be7f32e67b9..dd58713a158 100644 --- a/scripts/tracetool/format/h.py +++ b/scripts/tracetool/format/h.py @@ -55,7 +55,6 @@ def generate(events, backend, group): =20 out(' false)') =20 - # tracer without checks out('', 'static inline void %(api)s(%(args)s)', '{', @@ -63,11 +62,17 @@ def generate(events, backend, group): args=3De.args) =20 if "disable" not in e.properties: - backend.generate(e, group) + backend.generate(e, group, check_trace_event_get_state=3DFalse) =20 + if backend.check_trace_event_get_state: + event_id =3D 'TRACE_' + e.name.upper() + cond =3D "trace_event_get_state(%s)" % event_id + out(' if (%(cond)s) {', + cond=3Dcond) + backend.generate(e, group, check_trace_event_get_state=3DT= rue) + out(' }') out('}') =20 - backend.generate_end(events, group) =20 out('#endif /* TRACE_%s_GENERATED_TRACERS_H */' % group.upper()) --=20 2.51.0