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// Copyright 2025 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "chrome/browser/actor/aggregated_journal_serializer.h"
#include "base/containers/span.h"
#include "third_party/abseil-cpp/absl/strings/str_format.h"
#include "third_party/perfetto/include/perfetto/ext/tracing/core/trace_packet.h"
#include "third_party/perfetto/include/perfetto/protozero/scattered_heap_buffer.h"
#include "third_party/perfetto/protos/perfetto/common/builtin_clock.pbzero.h"
#include "third_party/perfetto/protos/perfetto/config/data_source_config.pbzero.h"
#include "third_party/perfetto/protos/perfetto/config/trace_config.pbzero.h"
#include "third_party/perfetto/protos/perfetto/config/track_event/track_event_config.gen.h"
#include "third_party/perfetto/protos/perfetto/trace/clock_snapshot.pbzero.h"
#include "third_party/perfetto/protos/perfetto/trace/perfetto/tracing_service_event.pbzero.h"
#include "third_party/perfetto/protos/perfetto/trace/trace_packet.pbzero.h"
#include "third_party/perfetto/protos/perfetto/trace/track_event/debug_annotation.pbzero.h"
#include "third_party/perfetto/protos/perfetto/trace/track_event/process_descriptor.pbzero.h"
#include "third_party/perfetto/protos/perfetto/trace/track_event/screenshot.pbzero.h"
#include "third_party/perfetto/protos/perfetto/trace/track_event/track_descriptor.pbzero.h"
#include "third_party/perfetto/protos/perfetto/trace/track_event/track_event.pbzero.h"
namespace actor {
namespace {
uint64_t NowInNanoseconds() {
return (base::Time::Now() - base::Time::UnixEpoch()).InNanoseconds();
}
const uint64_t kFrontEndId = 0x100000000;
} // namespace
AggregatedJournalSerializer::AggregatedJournalSerializer(
AggregatedJournal& journal)
: journal_(journal.GetSafeRef()) {}
void AggregatedJournalSerializer::InitImpl() {
WriteTracePreamble();
journal_->AddObserver(this);
}
void AggregatedJournalSerializer::WriteTracePreamble() {
observed_task_ids_.clear();
// Write initial message in protobuf.
{
protozero::HeapBuffered<perfetto::protos::pbzero::TracePacket> init_msg;
init_msg->set_trusted_packet_sequence_id(sequence_id_++);
auto* clock_snapshot = init_msg->set_clock_snapshot();
clock_snapshot->set_primary_trace_clock(
perfetto::protos::pbzero::BUILTIN_CLOCK_REALTIME);
auto* clock = clock_snapshot->add_clocks();
clock->set_clock_id(perfetto::protos::pbzero::BUILTIN_CLOCK_REALTIME);
clock->set_timestamp(NowInNanoseconds());
auto* trace_config = init_msg->set_trace_config();
auto* data_source = trace_config->add_data_sources();
auto* source_config = data_source->set_config();
source_config->set_name("track_event");
source_config->set_target_buffer(0);
perfetto::protos::gen::TrackEventConfig track_event_config;
track_event_config.add_enabled_categories("*");
source_config->set_track_event_config_raw(
track_event_config.SerializeAsString());
WriteTracePacket(init_msg.SerializeAsArray());
}
// Write tracing started.
{
protozero::HeapBuffered<perfetto::protos::pbzero::TracePacket> msg;
msg->set_trusted_packet_sequence_id(sequence_id_++);
msg->set_timestamp(NowInNanoseconds());
msg->set_timestamp_clock_id(
perfetto::protos::pbzero::BUILTIN_CLOCK_REALTIME);
auto* service_event = msg->set_service_event();
service_event->set_tracing_started(true);
WriteTracePacket(msg.SerializeAsArray());
}
// Write tracting active.
{
protozero::HeapBuffered<perfetto::protos::pbzero::TracePacket> msg;
msg->set_trusted_packet_sequence_id(sequence_id_++);
msg->set_timestamp(NowInNanoseconds());
msg->set_timestamp_clock_id(
perfetto::protos::pbzero::BUILTIN_CLOCK_REALTIME);
auto* service_event = msg->set_service_event();
service_event->set_all_data_sources_started(true);
WriteTracePacket(msg.SerializeAsArray());
}
}
AggregatedJournalSerializer::~AggregatedJournalSerializer() {
journal_->RemoveObserver(this);
}
void AggregatedJournalSerializer::WillAddJournalEntry(
const AggregatedJournal::Entry& entry) {
ObservedTaskId(entry.data->task_id);
protozero::HeapBuffered<perfetto::protos::pbzero::TracePacket> msg;
msg->set_trusted_packet_sequence_id(sequence_id_++);
msg->set_timestamp(
(entry.data->timestamp - base::Time::UnixEpoch()).InNanoseconds());
msg->set_timestamp_clock_id(perfetto::protos::pbzero::BUILTIN_CLOCK_REALTIME);
auto* track_event = msg->set_track_event();
perfetto::protos::pbzero::TrackEvent_Type pb_type =
perfetto::protos::pbzero::TrackEvent::TYPE_UNSPECIFIED;
switch (entry.data->type) {
case mojom::JournalEntryType::kBegin:
pb_type = perfetto::protos::pbzero::TrackEvent::TYPE_SLICE_BEGIN;
break;
case mojom::JournalEntryType::kEnd:
pb_type = perfetto::protos::pbzero::TrackEvent::TYPE_SLICE_END;
break;
case mojom::JournalEntryType::kInstant:
pb_type = perfetto::protos::pbzero::TrackEvent::TYPE_INSTANT;
break;
}
track_event->set_type(pb_type);
track_event->set_name(entry.data->event);
if (entry.data->task_id != 0) {
uint64_t track_uuid = entry.data->task_id;
if (entry.data->track == mojom::JournalTrack::kFrontEnd) {
track_uuid += kFrontEndId;
}
track_event->set_track_uuid(track_uuid);
}
// For Perfetto to read screenshots we need to have the category as
// "android_screenshot". See
// https://github.com/google/perfetto/blob/891351c7233523c01dc0e58ac8650df47fad9ab5/src/trace_processor/perfetto_sql/stdlib/android/screenshots.sql#L37
track_event->add_categories(
entry.jpg_screenshot.has_value() ? "android_screenshot" : "actor");
auto* annotation = track_event->add_debug_annotations();
if (!entry.data->details.empty()) {
annotation->set_name(
pb_type == perfetto::protos::pbzero::TrackEvent::TYPE_SLICE_BEGIN
? "begin_details"
: "details");
annotation->set_string_value(entry.data->details);
}
// If we have an annontated page content we encde it into screenshot
// descriptor for now. TODO(dtapuska): annotation->set_proto_value
// wasn't working because it didn't know about the encoded protobuf
// type in the chrome_intelligence_proto_features.AnnotatedPageContent type.
if (entry.annotated_page_content.has_value()) {
auto* screenshot = track_event->set_screenshot();
screenshot->set_jpg_image(entry.annotated_page_content->data(),
entry.annotated_page_content->size());
}
if (entry.jpg_screenshot.has_value()) {
auto* screenshot = track_event->set_screenshot();
screenshot->set_jpg_image(entry.jpg_screenshot->data(),
entry.jpg_screenshot->size());
}
if (!entry.url.empty()) {
annotation = track_event->add_debug_annotations();
annotation->set_name("url");
annotation->set_string_value(entry.url);
}
WriteTracePacket(msg.SerializeAsArray());
}
void AggregatedJournalSerializer::ObservedTaskId(int32_t task_id) {
if (task_id == 0 || observed_task_ids_.contains(task_id)) {
return;
}
{
protozero::HeapBuffered<perfetto::protos::pbzero::TracePacket> msg;
msg->set_trusted_packet_sequence_id(sequence_id_++);
msg->set_timestamp(NowInNanoseconds());
msg->set_timestamp_clock_id(
perfetto::protos::pbzero::BUILTIN_CLOCK_REALTIME);
auto* track_descriptor = msg->set_track_descriptor();
track_descriptor->set_uuid(kFrontEndId + task_id);
track_descriptor->set_name("Front End");
auto* process_descriptor = track_descriptor->set_process();
process_descriptor->set_pid(task_id);
WriteTracePacket(msg.SerializeAsArray());
}
{
protozero::HeapBuffered<perfetto::protos::pbzero::TracePacket> msg;
msg->set_trusted_packet_sequence_id(sequence_id_++);
msg->set_timestamp(NowInNanoseconds());
msg->set_timestamp_clock_id(
perfetto::protos::pbzero::BUILTIN_CLOCK_REALTIME);
auto* track_descriptor = msg->set_track_descriptor();
track_descriptor->set_uuid(task_id);
track_descriptor->set_parent_uuid(kFrontEndId + task_id);
track_descriptor->set_name("Chrome (actor)");
WriteTracePacket(msg.SerializeAsArray());
}
}
} // namespace actor
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