/*
 * Copyright (C) 2017 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";
option optimize_for = LITE_RUNTIME;

import "protos/perfetto/config/data_source_config.proto";

package perfetto.protos;

// The overall config that is used when starting a new tracing session through
// ProducerPort::StartTracing().
// It contains the general config for the logging buffer(s) and the configs for
// all the data source being enabled.
//
// Next id: 27.
message TraceConfig {
  message BufferConfig {
    optional uint32 size_kb = 1;

    reserved 2;  // |page_size|, now deprecated.
    reserved 3;  // |optimize_for|, now deprecated.

    enum FillPolicy {
      UNSPECIFIED = 0;

      // Default behavior. The buffer operates as a conventional ring buffer.
      // If the writer is faster than the reader (or if the reader reads only
      // after tracing is stopped) newly written packets will overwrite old
      // packets.
      RING_BUFFER = 1;

      // Behaves like RING_BUFFER as long as there is space in the buffer or
      // the reader catches up with the writer. As soon as the writer hits
      // an unread chunk, it stops accepting new data in the buffer.
      DISCARD = 2;
    }
    optional FillPolicy fill_policy = 4;
  }
  repeated BufferConfig buffers = 1;

  message DataSource {
    // Filters and data-source specific config. It contains also the unique name
    // of the data source, the one passed in the  DataSourceDescriptor when they
    // register on the service.
    optional protos.DataSourceConfig config = 1;

    // Optional. If multiple producers (~processes) expose the same data source
    // and |producer_name_filter| != "", the data source is enabled only for
    // producers whose names match any of the producer_name_filter below.
    // The |producer_name_filter| has to be an exact match. (TODO(primiano):
    // support wildcards or regex).
    // This allows to enable a data source only for specific processes.
    // The "repeated" field has OR sematics: specifying a filter ["foo", "bar"]
    // will enable data source on both "foo" and "bar" (if existent).
    repeated string producer_name_filter = 2;
  }
  repeated DataSource data_sources = 2;

  // Config for builtin trace packets emitted by perfetto like trace stats,
  // system info, etc.
  message BuiltinDataSource {
    // Disable emitting clock timestamps into the trace.
    optional bool disable_clock_snapshotting = 1;

    optional bool disable_trace_config = 2;

    optional bool disable_system_info = 3;
  }
  optional BuiltinDataSource builtin_data_sources = 20;

  // If specified, the trace will be stopped |duration_ms| after starting.
  // However in case of traces with triggers, see
  // TriggerConfig.trigger_timeout_ms instead.
  optional uint32 duration_ms = 3;

  // This is set when --dropbox is passed to the Perfetto command line client
  // and enables guardrails that limit resource usage for traces requested
  // by statsd.
  optional bool enable_extra_guardrails = 4;

  enum LockdownModeOperation {
    LOCKDOWN_UNCHANGED = 0;
    LOCKDOWN_CLEAR = 1;
    LOCKDOWN_SET = 2;
  }
  // Reject producers that are not running under the same UID as the tracing
  // service.
  optional LockdownModeOperation lockdown_mode = 5;

  message ProducerConfig {
    // Identifies the producer for which this config is for.
    optional string producer_name = 1;

    // Specifies the preferred size of the shared memory buffer. If the size is
    // larger than the max size, the max will be used. If it is smaller than
    // the page size or doesn't fit pages evenly into it, it will fall back to
    // the size specified by the producer or finally the default shared memory
    // size.
    optional uint32 shm_size_kb = 2;

    // Specifies the preferred size of each page in the shared memory buffer.
    // Must be an integer multiple of 4K.
    optional uint32 page_size_kb = 3;
  }

  repeated ProducerConfig producers = 6;

  // Contains statsd-specific metadata about an alert associated with the trace.
  message StatsdMetadata {
    // The identifier of the alert which triggered this trace.
    optional int64 triggering_alert_id = 1;
    // The uid which registered the triggering configuration with statsd.
    optional int32 triggering_config_uid = 2;
    // The identifier of the config which triggered the alert.
    optional int64 triggering_config_id = 3;
    // The identifier of the subscription which triggered this trace.
    optional int64 triggering_subscription_id = 4;
  }

  // Statsd-specific metadata.
  optional StatsdMetadata statsd_metadata = 7;

  // When true, the EnableTracing() request must also provide a file descriptor.
  // The service will then periodically read packets out of the trace buffer and
  // store it into the passed file.
  optional bool write_into_file = 8;

  // Optional. If non-zero tunes the write period. A min value of 100ms is
  // enforced (i.e. smaller values are ignored).
  optional uint32 file_write_period_ms = 9;

  // Optional. When non zero the periodic write stops once at most X bytes
  // have been written into the file. Tracing is disabled when this limit is
  // reached, even if |duration_ms| has not been reached yet.
  optional uint64 max_file_size_bytes = 10;

  // Contains flags which override the default values of the guardrails inside
  // Perfetto. These values are only affect userdebug builds.
  message GuardrailOverrides {
    // Override the default limit (in bytes) for uploading data to server within
    // a 24 hour period.
    optional uint64 max_upload_per_day_bytes = 1;
  }

  optional GuardrailOverrides guardrail_overrides = 11;

  // When true, data sources are not started until an explicit call to
  // StartTracing() on the consumer port. This is to support early
  // initialization and fast trace triggering. This can be used only when the
  // Consumer explicitly triggers the StartTracing() method.
  // This should not be used in a remote trace config via statsd, doing so will
  // result in a hung trace session.
  optional bool deferred_start = 12;

  // When set, it periodically issues a Flush() to all data source, forcing them
  // to commit their data into the tracing service. This can be used for
  // quasi-real-time streaming mode and to guarantee some partial ordering of
  // events in the trace in windows of X ms.
  optional uint32 flush_period_ms = 13;

  // Wait for this long for producers to acknowledge flush requests.
  // Default 5s.
  optional uint32 flush_timeout_ms = 14;

  // Wait for this long for producers to acknowledge stop requests.
  // Default 5s.
  optional uint32 data_source_stop_timeout_ms = 23;

  reserved 15;  // |disable_clock_snapshotting| moved.

  // Android-only. If set, sends an intent to the Traceur system app when the
  // trace ends to notify it about the trace readiness.
  optional bool notify_traceur = 16;

  // Triggers allow producers to start or stop the tracing session when an event
  // occurs.
  //
  // For example if we are tracing probabilistically, most traces will be
  // uninteresting. Triggers allow us to keep only the interesting ones such as
  // those traces during which the device temperature reached a certain
  // threshold. In this case the producer can activate a trigger to keep
  // (STOP_TRACING) the trace, otherwise it can also begin a trace
  // (START_TRACING) because it knows something is about to happen.
  message TriggerConfig {
    enum TriggerMode {
      UNSPECIFIED = 0;

      // When this mode is chosen, data sources are not started until one of the
      // |triggers| are received. This supports early initialization and fast
      // starting of the tracing system. On triggering, the session will then
      // record for |stop_delay_ms|. However if no trigger is seen
      // after |trigger_timeout_ms| the session will be stopped and no data will
      // be returned.
      START_TRACING = 1;

      // When this mode is chosen, the session will be started via the normal
      // EnableTracing() & StartTracing(). If no trigger is ever seen
      // the session will be stopped after |trigger_timeout_ms| and no data will
      // be returned. However if triggered the trace will stop after
      // |stop_delay_ms| and any data in the buffer will be returned to the
      // consumer.
      STOP_TRACING = 2;
    }
    optional TriggerMode trigger_mode = 1;

    message Trigger {
      // The producer must specify this name to activate the trigger.
      optional string name = 1;

      // The a std::regex that will match the producer that can activate this
      // trigger. This is optional. If unset any producers can activate this
      // trigger.
      optional string producer_name_regex = 2;

      // After a trigger is received either in START_TRACING or STOP_TRACING
      // mode then the trace will end |stop_delay_ms| after triggering.
      optional uint32 stop_delay_ms = 3;
    }
    // A list of triggers which are related to this configuration. If ANY
    // trigger is seen then an action will be performed based on |trigger_mode|.
    repeated Trigger triggers = 2;

    // Required and must be positive if a TriggerConfig is specified. This is
    // how long this TraceConfig should wait for a trigger to arrive. After this
    // period of time if no trigger is seen the TracingSession will be cleaned
    // up.
    optional uint32 trigger_timeout_ms = 3;
  }
  optional TriggerConfig trigger_config = 17;

  // When this is non-empty the perfetto command line tool will ignore the rest
  // of this TraceConfig and instead connect to the perfetto service as a
  // producer and send these triggers, potentially stopping or starting traces
  // that were previous configured to use a TriggerConfig.
  repeated string activate_triggers = 18;

  // Configuration for trace contents that reference earlier trace data. For
  // example, a data source might intern strings, and emit packets containing
  // {interned id : string} pairs. Future packets from that data source can then
  // use the interned ids instead of duplicating the raw string contents. The
  // trace parser will then need to use that interning table to fully interpret
  // the rest of the trace.
  message IncrementalStateConfig {
    // If nonzero, notify eligible data sources to clear their incremental state
    // periodically, with the given period. The notification is sent only to
    // data sources that have |handles_incremental_state_clear| set in their
    // DataSourceDescriptor. The notification requests that the data source
    // stops referring to past trace contents. This is particularly useful when
    // tracing in ring buffer mode, where it is not exceptional to overwrite old
    // trace data.
    //
    // Warning: this time-based global clearing is likely to be removed in the
    // future, to be replaced with a smarter way of sending the notifications
    // only when necessary.
    optional uint32 clear_period_ms = 1;
  }
  optional IncrementalStateConfig incremental_state_config = 21;

  // Additional guardrail used by the Perfetto command line client.
  // On user builds when --dropbox is set perfetto will refuse to trace unless
  // this is also set.
  // Added in Q.
  optional bool allow_user_build_tracing = 19;

  // If set the tracing service will ensure there is at most one tracing session
  // with this key.
  optional string unique_session_name = 22;

  // Compress trace with the given method. Best effort.
  enum CompressionType {
    COMPRESSION_TYPE_UNSPECIFIED = 0;
    COMPRESSION_TYPE_DEFLATE = 1;
  }
  optional CompressionType compression_type = 24;

  // Android-only. Debug builds only. Not for general use. If set, saves a
  // Dropbox trace into an incident. This field is read by perfetto_cmd, rather
  // than the tracing service. All fields are mandatory.
  message IncidentReportConfig {
    optional string destination_package = 1;
    optional string destination_class = 2;
    // Level of filtering in the requested incident. See |Destination| in
    // frameworks/base/core/proto/android/privacy.proto.
    optional int32 privacy_level = 3;
    // If true, do not write the trace into dropbox (i.e. incident only).
    // Otherwise, write to both dropbox and incident.
    optional bool skip_dropbox = 4;
  }
  optional IncidentReportConfig incident_report_config = 25;

  // An identifier clients can use to tie this trace to other logging.
  optional bytes trace_uuid = 26;
}