protos/perfetto/trace/chrome/chrome_trace_packet.proto

/*
 * Copyright (C) 2018 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.
 */

// Use proto3 syntax as an optimization. The difference is that proto2 stores
// unknown fields seen while decoding in an internal buffer (std::string) while
// proto3 completely drops them. Since during validation we only need to check
// for the presence of the trusted fields below, we can use proto3 as a way to
// speed up this process.
//
// See https://developers.google.com/protocol-buffers/docs/proto3#unknowns and
// https://android-review.googlesource.com/c/platform/external/perfetto/+/
// 591673#17 for details.
syntax = "proto3";
option optimize_for = LITE_RUNTIME;

import "perfetto/config/trace_config.proto";
import "perfetto/trace/chrome/chrome_trace_event.proto";
import "perfetto/trace/clock_snapshot.proto";
import "perfetto/trace/trace_stats.proto";

package perfetto.protos;

// This proto contains only the TracePacket fields that Chrome needs.
// Note that the field ids here must be kept in sync with TracePacket.
// This protobuf is here to avoid bloating the Chrome binary with symbols
// for all possible trace protos.
// TODO(b/78898755): Try using weak bindings instead of a separate proto.
message ChromeTracePacket {
  ChromeEventBundle chrome_events = 5;

  // The original trace config.
  TraceConfig trace_config = 33;
  TraceStats trace_stats = 35;

  ClockSnapshot clock_snapshot = 6;
}