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 */ 16syntax = "proto2"; 17 18package perfetto.protos; 19 20// A random unique ID that identifies the trace. 21// This message has been introduced in v32. Prior to that, the UUID was 22// only (optionally) present in the TraceConfig.trace_uuid_msb/lsb fields. 23// This has been moved to a standalone packet to deal with new use-cases for 24// go/gapless-aot, where the same tracing session can be serialized several 25// times, in which case the UUID is changed on each snapshot and does not match 26// the one in the TraceConfig. 27message TraceUuid { 28 optional int64 msb = 1; 29 optional int64 lsb = 2; 30} 31