xref: /aosp_15_r20/external/perfetto/protos/perfetto/trace/trace_uuid.proto (revision 6dbdd20afdafa5e3ca9b8809fa73465d530080dc)

/*
 * Copyright (C) 2022 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";

package perfetto.protos;

// A random unique ID that identifies the trace.
// This message has been introduced in v32. Prior to that, the UUID was
// only (optionally) present in the TraceConfig.trace_uuid_msb/lsb fields.
// This has been moved to a standalone packet to deal with new use-cases for
// go/gapless-aot, where the same tracing session can be serialized several
// times, in which case the UUID is changed on each snapshot and does not match
// the one in the TraceConfig.
message TraceUuid {
  optional int64 msb = 1;
  optional int64 lsb = 2;
}