/*
 * 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";

import "protos/perfetto/common/trace_stats.proto";
import "protos/perfetto/config/trace_config.proto";
import "protos/perfetto/trace/extension_descriptor.proto";
import "protos/perfetto/trace/android/android_log.proto";
import "protos/perfetto/trace/android/camera_event.proto";
import "protos/perfetto/trace/android/frame_timeline_event.proto";
import "protos/perfetto/trace/android/gpu_mem_event.proto";
import "protos/perfetto/trace/android/graphics_frame_event.proto";
import "protos/perfetto/trace/android/initial_display_state.proto";
import "protos/perfetto/trace/android/packages_list.proto";
import "protos/perfetto/trace/chrome/chrome_benchmark_metadata.proto";
import "protos/perfetto/trace/chrome/chrome_metadata.proto";
import "protos/perfetto/trace/chrome/chrome_trace_event.proto";
import "protos/perfetto/trace/clock_snapshot.proto";
import "protos/perfetto/trace/filesystem/inode_file_map.proto";
import "protos/perfetto/trace/ftrace/ftrace_event_bundle.proto";
import "protos/perfetto/trace/ftrace/ftrace_stats.proto";
import "protos/perfetto/trace/gpu/gpu_counter_event.proto";
import "protos/perfetto/trace/gpu/gpu_log.proto";
import "protos/perfetto/trace/gpu/gpu_render_stage_event.proto";
import "protos/perfetto/trace/gpu/vulkan_memory_event.proto";
import "protos/perfetto/trace/gpu/vulkan_api_event.proto";
import "protos/perfetto/trace/interned_data/interned_data.proto";
import "protos/perfetto/trace/memory_graph.proto";
import "protos/perfetto/trace/perfetto/perfetto_metatrace.proto";
import "protos/perfetto/trace/perfetto/tracing_service_event.proto";
import "protos/perfetto/trace/power/android_energy_estimation_breakdown.proto";
import "protos/perfetto/trace/power/battery_counters.proto";
import "protos/perfetto/trace/power/power_rails.proto";
import "protos/perfetto/trace/profiling/deobfuscation.proto";
import "protos/perfetto/trace/profiling/heap_graph.proto";
import "protos/perfetto/trace/profiling/profile_common.proto";
import "protos/perfetto/trace/profiling/profile_packet.proto";
import "protos/perfetto/trace/profiling/smaps.proto";
import "protos/perfetto/trace/ps/process_stats.proto";
import "protos/perfetto/trace/ps/process_tree.proto";
import "protos/perfetto/trace/sys_stats/sys_stats.proto";
import "protos/perfetto/trace/system_info.proto";
import "protos/perfetto/trace/system_info/cpu_info.proto";
import "protos/perfetto/trace/trace_packet_defaults.proto";
import "protos/perfetto/trace/track_event/process_descriptor.proto";
import "protos/perfetto/trace/track_event/thread_descriptor.proto";
import "protos/perfetto/trace/track_event/track_descriptor.proto";
import "protos/perfetto/trace/track_event/track_event.proto";
import "protos/perfetto/trace/translation/translation_table.proto";
import "protos/perfetto/trace/trigger.proto";
import "protos/perfetto/trace/test_event.proto";
import "protos/perfetto/trace/ui_state.proto";

package perfetto.protos;

// TracePacket is the root object of a Perfeto trace.
// A Perfetto trace is a linear sequence of TracePacket(s).
//
// The tracing service guarantees that all TracePacket(s) written by a given
// TraceWriter are seen in-order, without gaps or duplicates. If, for any
// reason, a TraceWriter sequence becomes invalid, no more packets are returned
// to the Consumer (or written into the trace file).
// TracePacket(s) written by different TraceWriter(s), hence even different
// data sources, can be seen in arbitrary order.
// The consumer can re-establish a total order, if interested, using the packet
// timestamps, after having synchronized the different clocks onto a global
// clock.
//
// The tracing service is agnostic of the content of TracePacket, with the
// exception of few fields (e.g.. trusted_*, trace_config) that are written by
// the service itself.
//
// See the [Buffers and Dataflow](/docs/concepts/buffers.md) doc for details.
//
// Next reserved id: 14 (up to 15).
// Next id: 83.
message TracePacket {
  // The timestamp of the TracePacket.
  // By default this timestamps refers to the trace clock (CLOCK_BOOTTIME on
  // Android). It can be overridden using a different timestamp_clock_id.
  // The clock domain definition in ClockSnapshot can also override:
  // - The unit (default: 1ns).
  // - The absolute vs delta encoding (default: absolute timestamp).
  optional uint64 timestamp = 8;

  // Specifies the ID of the clock used for the TracePacket |timestamp|. Can be
  // one of the built-in types from ClockSnapshot::BuiltinClocks, or a
  // producer-defined clock id.
  // If unspecified and if no default per-sequence value has been provided via
  // TracePacketDefaults, it defaults to BuiltinClocks::BOOTTIME.
  optional uint32 timestamp_clock_id = 58;

  oneof data {
    ProcessTree process_tree = 2;
    ProcessStats process_stats = 9;
    InodeFileMap inode_file_map = 4;
    ChromeEventBundle chrome_events = 5;
    ClockSnapshot clock_snapshot = 6;
    SysStats sys_stats = 7;
    TrackEvent track_event = 11;

    // IDs up to 15 are reserved. They take only one byte to encode their
    // preamble so should be used for frequent events.

    TraceConfig trace_config = 33;
    FtraceStats ftrace_stats = 34;
    TraceStats trace_stats = 35;
    ProfilePacket profile_packet = 37;
    StreamingAllocation streaming_allocation = 74;
    StreamingFree streaming_free = 75;
    BatteryCounters battery = 38;
    PowerRails power_rails = 40;
    AndroidLogPacket android_log = 39;
    SystemInfo system_info = 45;
    Trigger trigger = 46;
    PackagesList packages_list = 47;
    ChromeBenchmarkMetadata chrome_benchmark_metadata = 48;
    PerfettoMetatrace perfetto_metatrace = 49;
    ChromeMetadataPacket chrome_metadata = 51;
    GpuCounterEvent gpu_counter_event = 52;
    GpuRenderStageEvent gpu_render_stage_event = 53;
    StreamingProfilePacket streaming_profile_packet = 54;
    HeapGraph heap_graph = 56;
    GraphicsFrameEvent graphics_frame_event = 57;
    VulkanMemoryEvent vulkan_memory_event = 62;
    GpuLog gpu_log = 63;
    VulkanApiEvent vulkan_api_event = 65;
    PerfSample perf_sample = 66;
    CpuInfo cpu_info = 67;
    SmapsPacket smaps_packet = 68;
    TracingServiceEvent service_event = 69;
    InitialDisplayState initial_display_state = 70;
    GpuMemTotalEvent gpu_mem_total_event = 71;
    MemoryTrackerSnapshot memory_tracker_snapshot = 73;
    FrameTimelineEvent frame_timeline_event = 76;
    AndroidEnergyEstimationBreakdown android_energy_estimation_breakdown = 77;
    UiState ui_state = 78;
    AndroidCameraFrameEvent android_camera_frame_event = 80;
    AndroidCameraSessionStats android_camera_session_stats = 81;
    TranslationTable translation_table = 82;

    // Only used in profile packets.
    ProfiledFrameSymbols profiled_frame_symbols = 55;
    ModuleSymbols module_symbols = 61;
    DeobfuscationMapping deobfuscation_mapping = 64;

    // Only used by TrackEvent.
    TrackDescriptor track_descriptor = 60;

    // Deprecated, use TrackDescriptor instead.
    ProcessDescriptor process_descriptor = 43;

    // Deprecated, use TrackDescriptor instead.
    ThreadDescriptor thread_descriptor = 44;

    // Events from the Linux kernel ftrace infrastructure.
    FtraceEventBundle ftrace_events = 1;

    // This field is emitted at periodic intervals (~10s) and
    // contains always the binary representation of the UUID
    // {82477a76-b28d-42ba-81dc-33326d57a079}. This is used to be able to
    // efficiently partition long traces without having to fully parse them.
    bytes synchronization_marker = 36;

    // Zero or more proto encoded trace packets compressed using deflate.
    // Each compressed_packets TracePacket (including the two field ids and
    // sizes) should be less than 512KB.
    bytes compressed_packets = 50;

    // Data sources can extend the trace proto with custom extension protos (see
    // docs/design-docs/extensions.md). When they do that, the descriptor of
    // their extension proto descriptor is serialized in this packet. This
    // allows trace_processor to deserialize extended messages using reflection
    // even if the extension proto is not checked in the Perfetto repo.
    ExtensionDescriptor extension_descriptor = 72;

    // This field is only used for testing.
    // In previous versions of this proto this field had the id 268435455
    // This caused many problems:
    // - protozero decoder does not handle field ids larger than 999.
    // - old versions of protoc produce Java bindings with syntax errors when
    //   the field id is large enough.
    TestEvent for_testing = 900;
  }

  // Trusted user id of the producer which generated this packet. Keep in sync
  // with TrustedPacket.trusted_uid.
  //
  // TODO(eseckler): Emit this field in a PacketSequenceDescriptor message
  // instead.
  oneof optional_trusted_uid { int32 trusted_uid = 3; };

  // Service-assigned identifier of the packet sequence this packet belongs to.
  // Uniquely identifies a producer + writer pair within the tracing session. A
  // value of zero denotes an invalid ID. Keep in sync with
  // TrustedPacket.trusted_packet_sequence_id.
  oneof optional_trusted_packet_sequence_id {
    uint32 trusted_packet_sequence_id = 10;
  }

  // Trusted process id of the producer which generated this packet, written by
  // the service.
  optional int32 trusted_pid = 79;

  // Incrementally emitted interned data, valid only on the packet's sequence
  // (packets with the same |trusted_packet_sequence_id|). The writer will
  // usually emit new interned data in the same TracePacket that first refers to
  // it (since the last reset of interning state). It may also be emitted
  // proactively in advance of referring to them in later packets.
  optional InternedData interned_data = 12;

  enum SequenceFlags {
    SEQ_UNSPECIFIED = 0;

    // Set by the writer to indicate that it will re-emit any incremental data
    // for the packet's sequence before referring to it again. This includes
    // interned data as well as periodically emitted data like
    // Process/ThreadDescriptors. This flag only affects the current packet
    // sequence (see |trusted_packet_sequence_id|).
    //
    // When set, this TracePacket and subsequent TracePackets on the same
    // sequence will not refer to any incremental data emitted before this
    // TracePacket. For example, previously emitted interned data will be
    // re-emitted if it is referred to again.
    //
    // When the reader detects packet loss (|previous_packet_dropped|), it needs
    // to skip packets in the sequence until the next one with this flag set, to
    // ensure intact incremental data.
    SEQ_INCREMENTAL_STATE_CLEARED = 1;

    // This packet requires incremental state, such as TracePacketDefaults or
    // InternedData, to be parsed correctly. The trace reader should skip this
    // packet if incremental state is not valid on this sequence, i.e. if no
    // packet with the SEQ_INCREMENTAL_STATE_CLEARED flag has been seen on the
    // current |trusted_packet_sequence_id|.
    SEQ_NEEDS_INCREMENTAL_STATE = 2;
  };
  optional uint32 sequence_flags = 13;

  // DEPRECATED. Moved to SequenceFlags::SEQ_INCREMENTAL_STATE_CLEARED.
  optional bool incremental_state_cleared = 41;

  // Default values for fields of later TracePackets emitted on this packet's
  // sequence (TracePackets with the same |trusted_packet_sequence_id|).
  // It must be reemitted when incremental state is cleared (see
  // |incremental_state_cleared|).
  // Requires that any future packet emitted on the same sequence specifies
  // the SEQ_NEEDS_INCREMENTAL_STATE flag.
  // TracePacketDefaults always override the global defaults for any future
  // packet on this sequence (regardless of SEQ_NEEDS_INCREMENTAL_STATE).
  optional TracePacketDefaults trace_packet_defaults = 59;

  // Flag set by the service if, for the current packet sequence (see
  // |trusted_packet_sequence_id|), either:
  // * this is the first packet, or
  // * one or multiple packets were dropped since the last packet that the
  //   consumer read from the sequence. This can happen if chunks in the trace
  //   buffer are overridden before the consumer could read them when the trace
  //   is configured in ring buffer mode.
  //
  // When packet loss occurs, incrementally emitted data (including interned
  // data) on the sequence should be considered invalid up until the next packet
  // with SEQ_INCREMENTAL_STATE_CLEARED set.
  optional bool previous_packet_dropped = 42;
}