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GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	inspector/tracing_agent.cc	Lines:	85	88	96.6 %
Date:	2022-08-21 04:19:51	Branches:	12	18	66.7 %


#include "tracing_agent.h"
#include "main_thread_interface.h"
#include "node_internals.h"
#include "node_v8_platform-inl.h"
#include "v8.h"

#include <set>
#include <sstream>

namespace node {
namespace inspector {
namespace protocol {

namespace {
using v8::platform::tracing::TraceWriter;

class DeletableFrontendWrapper : public Deletable {
 public:
  explicit DeletableFrontendWrapper(
      std::weak_ptr<NodeTracing::Frontend> frontend)
      : frontend_(frontend) {}

  // This should only be called from the main thread, meaning frontend should
  // not be destroyed concurrently.
  NodeTracing::Frontend* get() { return frontend_.lock().get(); }

 private:
  std::weak_ptr<NodeTracing::Frontend> frontend_;
};

class CreateFrontendWrapperRequest : public Request {
 public:
  CreateFrontendWrapperRequest(int object_id,
                               std::weak_ptr<NodeTracing::Frontend> frontend)
      : object_id_(object_id) {
    frontend_wrapper_ = std::make_unique<DeletableFrontendWrapper>(frontend);
  }

  void Call(MainThreadInterface* thread) override {
    thread->AddObject(object_id_, std::move(frontend_wrapper_));
  }

 private:
  int object_id_;
  std::unique_ptr<DeletableFrontendWrapper> frontend_wrapper_;
};

class DestroyFrontendWrapperRequest : public Request {
 public:
  explicit DestroyFrontendWrapperRequest(int object_id)
      : object_id_(object_id) {}

  void Call(MainThreadInterface* thread) override {
    thread->RemoveObject(object_id_);
  }

 private:
  int object_id_;
};

class SendMessageRequest : public Request {
 public:
  explicit SendMessageRequest(int object_id, const std::string& message)
      : object_id_(object_id), message_(message) {}

  void Call(MainThreadInterface* thread) override {
    DeletableFrontendWrapper* frontend_wrapper =
        static_cast<DeletableFrontendWrapper*>(
            thread->GetObjectIfExists(object_id_));
    if (frontend_wrapper == nullptr) return;
    auto frontend = frontend_wrapper->get();
    if (frontend != nullptr) {
      frontend->sendRawJSONNotification(message_);
    }
  }

 private:
  int object_id_;
  std::string message_;
};

class InspectorTraceWriter : public node::tracing::AsyncTraceWriter {
 public:
  explicit InspectorTraceWriter(int frontend_object_id,
                                std::shared_ptr<MainThreadHandle> main_thread)
      : frontend_object_id_(frontend_object_id), main_thread_(main_thread) {}

  void AppendTraceEvent(
      v8::platform::tracing::TraceObject* trace_event) override {
    if (!json_writer_)
      json_writer_.reset(TraceWriter::CreateJSONTraceWriter(stream_, "value"));
    json_writer_->AppendTraceEvent(trace_event);
  }

  void Flush(bool) override {
    if (!json_writer_)
      return;
    json_writer_.reset();
    std::ostringstream result(
        "{\"method\":\"NodeTracing.dataCollected\",\"params\":",
        std::ostringstream::ate);
    result << stream_.str();
    result << "}";
    main_thread_->Post(std::make_unique<SendMessageRequest>(frontend_object_id_,
                                                            result.str()));
    stream_.str("");
  }

 private:
  std::unique_ptr<TraceWriter> json_writer_;
  std::ostringstream stream_;
  int frontend_object_id_;
  std::shared_ptr<MainThreadHandle> main_thread_;
};
}  // namespace

TracingAgent::TracingAgent(Environment* env,
                           std::shared_ptr<MainThreadHandle> main_thread)
    : env_(env), main_thread_(main_thread) {}

TracingAgent::~TracingAgent() {
  trace_writer_.reset();
  main_thread_->Post(
      std::make_unique<DestroyFrontendWrapperRequest>(frontend_object_id_));
}

void TracingAgent::Wire(UberDispatcher* dispatcher) {
  // Note that frontend is still owned by TracingAgent
  frontend_ = std::make_shared<NodeTracing::Frontend>(dispatcher->channel());
  frontend_object_id_ = main_thread_->newObjectId();
  main_thread_->Post(std::make_unique<CreateFrontendWrapperRequest>(
      frontend_object_id_, frontend_));
  NodeTracing::Dispatcher::wire(dispatcher, this);
}

DispatchResponse TracingAgent::start(
    std::unique_ptr<protocol::NodeTracing::TraceConfig> traceConfig) {
  if (!trace_writer_.empty()) {
    return DispatchResponse::Error(
        "Call NodeTracing::end to stop tracing before updating the config");
  }
  if (!env_->owns_process_state()) {
    return DispatchResponse::Error(
        "Tracing properties can only be changed through main thread sessions");
  }

  std::set<std::string> categories_set;
  protocol::Array<std::string>* categories =
      traceConfig->getIncludedCategories();
  for (size_t i = 0; i < categories->length(); i++)
    categories_set.insert(categories->get(i));

  if (categories_set.empty())
    return DispatchResponse::Error("At least one category should be enabled");

  tracing::AgentWriterHandle* writer = GetTracingAgentWriter();
  if (writer != nullptr) {
    trace_writer_ =
        writer->agent()->AddClient(categories_set,
                                   std::make_unique<InspectorTraceWriter>(
                                       frontend_object_id_, main_thread_),
                                   tracing::Agent::kIgnoreDefaultCategories);
  }
  return DispatchResponse::OK();
}

DispatchResponse TracingAgent::stop() {
  trace_writer_.reset();
  frontend_->tracingComplete();
  return DispatchResponse::OK();
}

DispatchResponse TracingAgent::getCategories(
    std::unique_ptr<protocol::Array<String>>* categories) {
  *categories = Array<String>::create();
  categories->get()->addItem("node");
  categories->get()->addItem("node.async");
  categories->get()->addItem("node.bootstrap");
  categories->get()->addItem("node.fs.sync");
  categories->get()->addItem("node.perf");
  categories->get()->addItem("node.perf.usertiming");
  categories->get()->addItem("node.perf.timerify");
  categories->get()->addItem("v8");
  return DispatchResponse::OK();
}

}  // namespace protocol
}  // namespace inspector
}  // namespace node


Generated by: GCOVR (Version 4.2)

Line	Branch	Exec	Source
1			#include "tracing_agent.h"
2			#include "main_thread_interface.h"
3			#include "node_internals.h"
4			#include "node_v8_platform-inl.h"
5			#include "v8.h"
6
7			#include <set>
8			#include <sstream>
9
10			namespace node {
11			namespace inspector {
12			namespace protocol {
13
14			namespace {
15			using v8::platform::tracing::TraceWriter;
16
17			class DeletableFrontendWrapper : public Deletable {
18			public:
19		7088	explicit DeletableFrontendWrapper(
20			std::weak_ptr<NodeTracing::Frontend> frontend)
21		7088	: frontend_(frontend) {}
22
23			// This should only be called from the main thread, meaning frontend should
24			// not be destroyed concurrently.
25		4	NodeTracing::Frontend* get() { return frontend_.lock().get(); }
26
27			private:
28			std::weak_ptr<NodeTracing::Frontend> frontend_;
29			};
30
31			class CreateFrontendWrapperRequest : public Request {
32			public:
33		7088	CreateFrontendWrapperRequest(int object_id,
34			std::weak_ptr<NodeTracing::Frontend> frontend)
35		7088	: object_id_(object_id) {
36		7088	frontend_wrapper_ = std::make_unique<DeletableFrontendWrapper>(frontend);
37		7088	}
38
39		7088	void Call(MainThreadInterface* thread) override {
40		7088	thread->AddObject(object_id_, std::move(frontend_wrapper_));
41		7088	}
42
43			private:
44			int object_id_;
45			std::unique_ptr<DeletableFrontendWrapper> frontend_wrapper_;
46			};
47
48			class DestroyFrontendWrapperRequest : public Request {
49			public:
50		6538	explicit DestroyFrontendWrapperRequest(int object_id)
51		6538	: object_id_(object_id) {}
52
53		930	void Call(MainThreadInterface* thread) override {
54		930	thread->RemoveObject(object_id_);
55		930	}
56
57			private:
58			int object_id_;
59			};
60
61			class SendMessageRequest : public Request {
62			public:
63		4	explicit SendMessageRequest(int object_id, const std::string& message)
64		4	: object_id_(object_id), message_(message) {}
65
66		4	void Call(MainThreadInterface* thread) override {
67			DeletableFrontendWrapper* frontend_wrapper =
68			static_cast<DeletableFrontendWrapper*>(
69		4	thread->GetObjectIfExists(object_id_));
70	✗✓	4	if (frontend_wrapper == nullptr) return;
71		4	auto frontend = frontend_wrapper->get();
72	✓✗	4	if (frontend != nullptr) {
73		4	frontend->sendRawJSONNotification(message_);
74			}
75			}
76
77			private:
78			int object_id_;
79			std::string message_;
80			};
81
82			class InspectorTraceWriter : public node::tracing::AsyncTraceWriter {
83			public:
84		2	explicit InspectorTraceWriter(int frontend_object_id,
85			std::shared_ptr<MainThreadHandle> main_thread)
86		2	: frontend_object_id_(frontend_object_id), main_thread_(main_thread) {}
87
88		93	void AppendTraceEvent(
89			v8::platform::tracing::TraceObject* trace_event) override {
90	✓✓	93	if (!json_writer_)
91		4	json_writer_.reset(TraceWriter::CreateJSONTraceWriter(stream_, "value"));
92		93	json_writer_->AppendTraceEvent(trace_event);
93		93	}
94
95		4	void Flush(bool) override {
96	✗✓	4	if (!json_writer_)
97			return;
98		4	json_writer_.reset();
99			std::ostringstream result(
100			"{\"method\":\"NodeTracing.dataCollected\",\"params\":",
101		8	std::ostringstream::ate);
102		4	result << stream_.str();
103		4	result << "}";
104		8	main_thread_->Post(std::make_unique<SendMessageRequest>(frontend_object_id_,
105		8	result.str()));
106		4	stream_.str("");
107			}
108
109			private:
110			std::unique_ptr<TraceWriter> json_writer_;
111			std::ostringstream stream_;
112			int frontend_object_id_;
113			std::shared_ptr<MainThreadHandle> main_thread_;
114			};
115			} // namespace
116
117		7088	TracingAgent::TracingAgent(Environment* env,
118		7088	std::shared_ptr<MainThreadHandle> main_thread)
119		7088	: env_(env), main_thread_(main_thread) {}
120
121		26152	TracingAgent::~TracingAgent() {
122		13076	trace_writer_.reset();
123		26152	main_thread_->Post(
124		26152	std::make_unique<DestroyFrontendWrapperRequest>(frontend_object_id_));
125		26152	}
126
127		7088	void TracingAgent::Wire(UberDispatcher* dispatcher) {
128			// Note that frontend is still owned by TracingAgent
129		7088	frontend_ = std::make_shared<NodeTracing::Frontend>(dispatcher->channel());
130		7088	frontend_object_id_ = main_thread_->newObjectId();
131		14176	main_thread_->Post(std::make_unique<CreateFrontendWrapperRequest>(
132		7088	frontend_object_id_, frontend_));
133		7088	NodeTracing::Dispatcher::wire(dispatcher, this);
134		7088	}
135
136		3	DispatchResponse TracingAgent::start(
137			std::unique_ptr<protocol::NodeTracing::TraceConfig> traceConfig) {
138	✗✓	3	if (!trace_writer_.empty()) {
139			return DispatchResponse::Error(
140			"Call NodeTracing::end to stop tracing before updating the config");
141			}
142	✓✓	3	if (!env_->owns_process_state()) {
143			return DispatchResponse::Error(
144		1	"Tracing properties can only be changed through main thread sessions");
145			}
146
147		4	std::set<std::string> categories_set;
148			protocol::Array<std::string>* categories =
149		2	traceConfig->getIncludedCategories();
150	✓✓	4	for (size_t i = 0; i < categories->length(); i++)
151		2	categories_set.insert(categories->get(i));
152
153	✗✓	2	if (categories_set.empty())
154			return DispatchResponse::Error("At least one category should be enabled");
155
156		2	tracing::AgentWriterHandle* writer = GetTracingAgentWriter();
157	✓✗	2	if (writer != nullptr) {
158			trace_writer_ =
159		6	writer->agent()->AddClient(categories_set,
160		2	std::make_unique<InspectorTraceWriter>(
161		2	frontend_object_id_, main_thread_),
162		2	tracing::Agent::kIgnoreDefaultCategories);
163			}
164		2	return DispatchResponse::OK();
165			}
166
167		2	DispatchResponse TracingAgent::stop() {
168		2	trace_writer_.reset();
169		2	frontend_->tracingComplete();
170		2	return DispatchResponse::OK();
171			}
172
173		1	DispatchResponse TracingAgent::getCategories(
174			std::unique_ptr<protocol::Array<String>>* categories) {
175		1	*categories = Array<String>::create();
176		1	categories->get()->addItem("node");
177		1	categories->get()->addItem("node.async");
178		1	categories->get()->addItem("node.bootstrap");
179		1	categories->get()->addItem("node.fs.sync");
180		1	categories->get()->addItem("node.perf");
181		1	categories->get()->addItem("node.perf.usertiming");
182		1	categories->get()->addItem("node.perf.timerify");
183		1	categories->get()->addItem("v8");
184		1	return DispatchResponse::OK();
185			}
186
187			} // namespace protocol
188			} // namespace inspector
189			} // namespace node