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40 ****************************************************************************/
42 #include "qv8profilerservice_p.h"
43 #include "qdeclarativedebugservice_p_p.h"
44 #include "qdeclarativeengine_p.h"
45 #include "private/qv8profiler_p.h"
46 #include "qjsconverter_p.h"
48 #include <QtCore/QHash>
52 Q_GLOBAL_STATIC(QV8ProfilerService, v8ServiceInstance)
54 class ByteArrayOutputStream : public v8::OutputStream
58 ByteArrayOutputStream(QByteArray *buffer)
62 WriteResult WriteAsciiChunk(char *data, int size)
64 QByteArray b(data, size);
70 // convert to a QByteArray that can be sent to the debug client
71 QByteArray QV8ProfilerData::toByteArray() const
74 //### using QDataStream is relatively expensive
75 QDataStream ds(&data, QIODevice::WriteOnly);
76 ds << messageType << filename << functionname << lineNumber << totalTime << selfTime << treeLevel;
81 class QV8ProfilerServicePrivate : public QDeclarativeDebugServicePrivate
83 Q_DECLARE_PUBLIC(QV8ProfilerService)
86 QV8ProfilerServicePrivate()
91 void takeSnapshot(v8::HeapSnapshot::Type);
93 void printProfileTree(const v8::CpuProfileNode *node, int level = 0);
96 QList<QV8ProfilerData> m_data;
99 QList<QDeclarativeEngine *> engines;
102 QV8ProfilerService::QV8ProfilerService(QObject *parent)
103 : QDeclarativeDebugService(*(new QV8ProfilerServicePrivate()), QLatin1String("V8Profiler"), parent)
105 Q_D(QV8ProfilerService);
106 if (status() == Enabled) {
107 // ,block mode, client attached
108 while (!d->initialized)
113 QV8ProfilerService::~QV8ProfilerService()
117 QV8ProfilerService *QV8ProfilerService::instance()
119 return v8ServiceInstance();
122 void QV8ProfilerService::addEngine(QDeclarativeEngine *engine)
124 Q_D(QV8ProfilerService);
126 Q_ASSERT(!d->engines.contains(engine));
128 d->engines.append(engine);
131 void QV8ProfilerService::removeEngine(QDeclarativeEngine *engine)
133 Q_D(QV8ProfilerService);
135 Q_ASSERT(d->engines.contains(engine));
137 d->engines.removeOne(engine);
140 void QV8ProfilerService::messageReceived(const QByteArray &message)
142 Q_D(QV8ProfilerService);
144 QDataStream ds(message);
148 ds >> command >> option;
150 if (command == "V8PROFILER") {
152 if (option == "start") {
153 d->initialized = true;
154 startProfiling(QString::fromUtf8(title));
155 } else if (option == "stop") {
156 stopProfiling(QString::fromUtf8(title));
157 // Send messages to client
162 if (command == "V8SNAPSHOT") {
163 if (option == "full")
164 d->takeSnapshot(v8::HeapSnapshot::kFull);
165 else if (option == "delete") {
166 v8::HeapProfiler::DeleteAllSnapshots();
170 QDeclarativeDebugService::messageReceived(message);
173 void QV8ProfilerService::startProfiling(const QString &title)
176 v8::HandleScope handle_scope;
177 v8::Handle<v8::String> v8title = v8::String::New(reinterpret_cast<const uint16_t*>(title.data()), title.size());
178 v8::CpuProfiler::StartProfiling(v8title);
181 void QV8ProfilerService::stopProfiling(const QString &title)
183 Q_D(QV8ProfilerService);
185 v8::HandleScope handle_scope;
186 v8::Handle<v8::String> v8title = v8::String::New(reinterpret_cast<const uint16_t*>(title.data()), title.size());
187 const v8::CpuProfile *cpuProfile = v8::CpuProfiler::StopProfiling(v8title);
188 const v8::CpuProfileNode *rootNode = cpuProfile->GetTopDownRoot();
190 d->printProfileTree(rootNode);
193 void QV8ProfilerServicePrivate::printProfileTree(const v8::CpuProfileNode *node, int level)
195 for (int index = 0 ; index < node->GetChildrenCount() ; index++) {
196 const v8::CpuProfileNode* childNode = node->GetChild(index);
197 if (QV8Engine::toStringStatic(childNode->GetScriptResourceName()).length() > 0) {
199 QV8ProfilerData rd = {(int)QV8ProfilerService::V8Entry, QV8Engine::toStringStatic(childNode->GetScriptResourceName()),
200 QV8Engine::toStringStatic(childNode->GetFunctionName()),
201 childNode->GetLineNumber(), childNode->GetTotalTime(), childNode->GetSelfTime(), level};
204 // different nodes might have common children: fix at client side
205 if (childNode->GetChildrenCount() > 0) {
206 printProfileTree(childNode, level+1);
212 void QV8ProfilerServicePrivate::takeSnapshot(v8::HeapSnapshot::Type snapshotType)
214 Q_Q(QV8ProfilerService);
216 v8::HandleScope scope;
217 v8::Local<v8::String> title = v8::String::New("");
219 QByteArray jsonSnapshot;
220 ByteArrayOutputStream bos(&jsonSnapshot);
221 const v8::HeapSnapshot *snapshot = v8::HeapProfiler::TakeSnapshot(title, snapshotType);
222 snapshot->Serialize(&bos, v8::HeapSnapshot::kJSON);
225 QDataStream ds(&data, QIODevice::WriteOnly);
226 ds << (int)QV8ProfilerService::V8Snapshot << jsonSnapshot;
228 q->sendMessage(data);
231 void QV8ProfilerServicePrivate::sendMessages()
233 Q_Q(QV8ProfilerService);
235 for (int i = 0; i < m_data.count(); ++i)
236 q->sendMessage(m_data.at(i).toByteArray());
239 //indicate completion
241 QDataStream ds(&data, QIODevice::WriteOnly);
242 ds << (int)QV8ProfilerService::V8Complete;
244 q->sendMessage(data);