1/* 2 * Copyright (C) 2022 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 android.os.statsd; 20 21option java_package = "com.android.os"; 22option java_multiple_files = true; 23 24/** 25 * This proto represents a node of an attribution chain. 26 * Note: All attribution chains are represented as a repeated field of type 27 * AttributionNode. It is understood that in such arrays, the order is that 28 * of calls, that is [A, B, C] if A calls B that calls C. 29 */ 30message AttributionNode { 31 // The uid for a given element in the attribution chain. 32 optional int32 uid = 1; 33 34 // The (optional) string tag for an element in the attribution chain. If the 35 // element has no tag, it is encoded as an empty string. 36 optional string tag = 2; 37} 38 39