protos/perfetto/config/data_source_descriptor.proto

/*
 * Copyright (C) 2017 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

syntax = "proto2";
option optimize_for = LITE_RUNTIME;

package perfetto.protos;

// When editing this file run ./tools/gen_tracing_cpp_headers_from_protos.py
// to reflect changes in the corresponding C++ headers.

// This message is sent from Producer(s) to the tracing Service when registering
// to advertise their capabilities. It describes the structure of tracing
// protos that will be produced by the data source and the supported filters.
message DataSourceDescriptor {
  optional string name = 1;  // e.g., "linux.ftrace", "chromium.tracing"

  // When true the data source is expected to ack the stop request through the
  // NotifyDataSourceStopped() IPC. This field has been introduced after
  // Android P in Jul 2018 and is not supported on older versions.
  optional bool will_notify_on_stop = 2;

  // When true the data source is expected to ack the start request through the
  // NotifyDataSourceStarted() IPC. This field has been introduced after
  // Android P in March 2019 and is not supported on older versions.
  optional bool will_notify_on_start = 3;

  // TODO: this should have a structure to enable reflection of the proto
  // fields emitted (see go/perfetto-logging).
}