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| 1 // Copyright 2017 The Chromium Authors. All rights reserved. |
| 2 // Use of this source code is governed by a BSD-style license that can be |
| 3 // found in the LICENSE file. |
| 4 |
| 5 #include "services/resource_coordinator/public/cpp/tracing/chrome_agent.h" |
| 6 |
| 7 #include "base/bind.h" |
| 8 #include "base/memory/ref_counted.h" |
| 9 #include "base/memory/ref_counted_memory.h" |
| 10 #include "base/trace_event/trace_log.h" |
| 11 #include "services/service_manager/public/cpp/connector.h" |
| 12 |
| 13 namespace resource_coordinator { |
| 14 namespace tracing { |
| 15 |
| 16 // static |
| 17 void ChromeAgent::InitializeIfNeeded(mojom::AgentSetPtr agent_set) { |
| 18 static ChromeAgent* instance = nullptr; |
| 19 if (!instance) |
| 20 instance = new ChromeAgent(std::move(agent_set)); |
| 21 } |
| 22 |
| 23 ChromeAgent::ChromeAgent(mojom::AgentSetPtr agent_set) |
| 24 : agent_set_(std::move(agent_set)), binding_(this) { |
| 25 agent_set_->RegisterAgent(binding_.CreateInterfacePtrAndBind(), "traceEvents", |
| 26 mojom::TraceDataType::ARRAY, |
| 27 false /* supports_explicit_clock_sync */); |
| 28 } |
| 29 |
| 30 ChromeAgent::~ChromeAgent() {} |
| 31 |
| 32 void ChromeAgent::StartTracing(const std::string& config, |
| 33 mojom::RecorderPtr recorder, |
| 34 bool report_categories_only, |
| 35 const StartTracingCallback& callback) { |
| 36 DCHECK(!recorder_); |
| 37 recorder_ = std::move(recorder); |
| 38 report_categories_only_ = report_categories_only; |
| 39 if (!base::trace_event::TraceLog::GetInstance()->IsEnabled()) { |
| 40 base::trace_event::TraceLog::GetInstance()->SetEnabled( |
| 41 base::trace_event::TraceConfig(config), |
| 42 base::trace_event::TraceLog::RECORDING_MODE); |
| 43 } |
| 44 callback.Run(); |
| 45 } |
| 46 |
| 47 void ChromeAgent::StopAndFlush() { |
| 48 if (!recorder_) |
| 49 return; |
| 50 base::trace_event::TraceLog::GetInstance()->SetDisabled(); |
| 51 if (!report_categories_only_) { |
| 52 base::trace_event::TraceLog::GetInstance()->Flush( |
| 53 base::Bind(&ChromeAgent::SendChunk, base::Unretained(this))); |
| 54 } else { |
| 55 base::trace_event::TraceLog::GetInstance()->Flush( |
| 56 base::trace_event::TraceLog::OutputCallback()); |
| 57 std::vector<std::string> category_vector; |
| 58 base::trace_event::TraceLog::GetInstance()->GetKnownCategoryGroups( |
| 59 &category_vector); |
| 60 std::string categories_str; |
| 61 bool first = true; |
| 62 for (const auto& category : category_vector) { |
| 63 if (!first) |
| 64 categories_str += ","; |
| 65 first = false; |
| 66 categories_str += category; |
| 67 } |
| 68 recorder_->AddCategories(categories_str); |
| 69 recorder_.reset(); |
| 70 } |
| 71 } |
| 72 |
| 73 void ChromeAgent::RequestClockSyncMarker( |
| 74 const std::string& sync_id, |
| 75 const RequestClockSyncMarkerCallback& callback) { |
| 76 NOTREACHED() << "This agent does not support explicit clock sync"; |
| 77 } |
| 78 |
| 79 void ChromeAgent::RequestBufferStatus( |
| 80 const RequestBufferStatusCallback& callback) { |
| 81 auto status = base::trace_event::TraceLog::GetInstance()->GetStatus(); |
| 82 callback.Run(status.event_capacity, status.event_count); |
| 83 } |
| 84 |
| 85 void ChromeAgent::SendChunk( |
| 86 const scoped_refptr<base::RefCountedString>& events_str, |
| 87 bool has_more_events) { |
| 88 DCHECK(recorder_); |
| 89 if (!events_str->data().empty()) |
| 90 recorder_->AddChunk(events_str->data()); |
| 91 if (!has_more_events) |
| 92 recorder_.reset(); |
| 93 } |
| 94 |
| 95 } // namespace tracing |
| 96 } |
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