third_party/perfetto/protos/perfetto/trace/android/android_log.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.
 */

syntax = "proto2";
package perfetto.protos;

import "protos/perfetto/common/android_log_constants.proto";

message AndroidLogPacket {
  message LogEvent {
    // The log buffer (e.g. MAIN, SYSTEM, RADIO) the event comes from.
    optional AndroidLogId log_id = 1;

    // PID (TGID), TID and UID of the task that emitted the event.
    optional int32 pid = 2;
    optional int32 tid = 3;
    optional int32 uid = 4;

    // Timestamp [ns]. The clock source is CLOCK_REALTIME, unlike many other
    // Perfetto trace events that instead use CLOCK_BOOTTIME. The trace
    // processor will take care of realigning clocks using the ClockSnapshot(s).
    optional uint64 timestamp = 5;

    // When log_id == LID_EVENTS, |tag| corresponds to the event name defined in
    // the second column of /system/etc/event-log-tags. For all other events,
    // |tag| is the app-specified argument passed to __android_log_write().
    optional string tag = 6;

    // Empty when log_id == LID_EVENTS.
    optional AndroidLogPriority prio = 7;

    // Empty when log_id == LID_EVENTS.
    optional string message = 8;

    message Arg {
      optional string name = 1;
      oneof value {
        int64 int_value = 2;
        float float_value = 3;
        string string_value = 4;
      }
    }
    // Only populated when log_id == LID_EVENTS.
    repeated Arg args = 9;
  }

  repeated LogEvent events = 1;

  // Stats are emitted only upon Flush() and are monotonic (i.e. they are
  // absolute counters since the beginning of the lifetime of the tracing
  // session and NOT relative to the previous Stats snapshot).
  message Stats {
    // Total number of log events seen, including errors and skipped entries
    // (num of events stored in the trace = total - failed - skipped).
    optional uint64 num_total = 1;

    // Parser failures.
    optional uint64 num_failed = 2;

    // Messages skipped due to filters.
    optional uint64 num_skipped = 3;
  }
  optional Stats stats = 2;
}