1/* 2 * Copyright (C) 2017 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 17syntax = "proto2"; 18 19package perfetto.protos; 20 21import "protos/perfetto/common/gpu_counter_descriptor.proto"; 22import "protos/perfetto/common/track_event_descriptor.proto"; 23 24// This message is sent from Producer(s) to the tracing Service when registering 25// to advertise their capabilities. It describes the structure of tracing 26// protos that will be produced by the data source and the supported filters. 27message DataSourceDescriptor { 28 // e.g., "linux.ftrace", "chromium.tracing" 29 optional string name = 1; 30 31 // When true the data source is expected to ack the stop request through the 32 // NotifyDataSourceStopped() IPC. This field has been introduced after 33 // Android P in Jul 2018 and is not supported on older versions. 34 optional bool will_notify_on_stop = 2; 35 36 // When true the data source is expected to ack the start request through the 37 // NotifyDataSourceStarted() IPC. This field has been introduced after 38 // Android P in March 2019 and is not supported on older versions. 39 optional bool will_notify_on_start = 3; 40 41 // If true, opt into receiving the ClearIncrementalState() IPC. This should be 42 // set if the data source writes packets that refer to previous trace 43 // contents, and knows how to stop referring to the already-emitted data. 44 optional bool handles_incremental_state_clear = 4; 45 46 // Optional specification about available GPU counters. 47 optional GpuCounterDescriptor gpu_counter_descriptor = 5 [lazy = true]; 48 49 optional TrackEventDescriptor track_event_descriptor = 6 [lazy = true]; 50} 51