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22 ** GNU General Public License Usage
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40 ****************************************************************************/
42 #include "qv8profilerservice_p.h"
43 #include "qdeclarativedebugservice_p_p.h"
44 #include <private/qdeclarativeengine_p.h>
45 #include <private/qv8profiler_p.h>
47 #include <QtCore/QHash>
51 Q_GLOBAL_STATIC(QV8ProfilerService, v8ServiceInstance)
53 class ByteArrayOutputStream : public v8::OutputStream
57 ByteArrayOutputStream(QByteArray *buffer)
61 WriteResult WriteAsciiChunk(char *data, int size)
63 QByteArray b(data, size);
69 // convert to a QByteArray that can be sent to the debug client
70 QByteArray QV8ProfilerData::toByteArray() const
73 //### using QDataStream is relatively expensive
74 QDataStream ds(&data, QIODevice::WriteOnly);
75 ds << messageType << filename << functionname << lineNumber << totalTime << selfTime << treeLevel;
80 class QV8ProfilerServicePrivate : public QDeclarativeDebugServicePrivate
82 Q_DECLARE_PUBLIC(QV8ProfilerService)
85 QV8ProfilerServicePrivate()
90 void takeSnapshot(v8::HeapSnapshot::Type);
92 void printProfileTree(const v8::CpuProfileNode *node, int level = 0);
95 QList<QV8ProfilerData> m_data;
98 QList<QDeclarativeEngine *> engines;
101 QV8ProfilerService::QV8ProfilerService(QObject *parent)
102 : QDeclarativeDebugService(*(new QV8ProfilerServicePrivate()), QLatin1String("V8Profiler"), parent)
104 Q_D(QV8ProfilerService);
105 if (status() == Enabled) {
106 // ,block mode, client attached
107 while (!d->initialized)
112 QV8ProfilerService::~QV8ProfilerService()
116 QV8ProfilerService *QV8ProfilerService::instance()
118 return v8ServiceInstance();
121 void QV8ProfilerService::addEngine(QDeclarativeEngine *engine)
123 Q_D(QV8ProfilerService);
125 Q_ASSERT(!d->engines.contains(engine));
127 d->engines.append(engine);
130 void QV8ProfilerService::removeEngine(QDeclarativeEngine *engine)
132 Q_D(QV8ProfilerService);
134 Q_ASSERT(d->engines.contains(engine));
136 d->engines.removeOne(engine);
139 void QV8ProfilerService::messageReceived(const QByteArray &message)
141 Q_D(QV8ProfilerService);
143 QDataStream ds(message);
147 ds >> command >> option;
149 if (command == "V8PROFILER") {
151 if (option == "start") {
152 d->initialized = true;
153 startProfiling(QString::fromUtf8(title));
154 } else if (option == "stop") {
155 stopProfiling(QString::fromUtf8(title));
156 // Send messages to client
161 if (command == "V8SNAPSHOT") {
162 if (option == "full")
163 d->takeSnapshot(v8::HeapSnapshot::kFull);
164 else if (option == "delete") {
165 v8::HeapProfiler::DeleteAllSnapshots();
169 QDeclarativeDebugService::messageReceived(message);
172 void QV8ProfilerService::startProfiling(const QString &title)
175 v8::HandleScope handle_scope;
176 v8::Handle<v8::String> v8title = v8::String::New(reinterpret_cast<const uint16_t*>(title.data()), title.size());
177 v8::CpuProfiler::StartProfiling(v8title);
180 void QV8ProfilerService::stopProfiling(const QString &title)
182 Q_D(QV8ProfilerService);
184 v8::HandleScope handle_scope;
185 v8::Handle<v8::String> v8title = v8::String::New(reinterpret_cast<const uint16_t*>(title.data()), title.size());
186 const v8::CpuProfile *cpuProfile = v8::CpuProfiler::StopProfiling(v8title);
187 const v8::CpuProfileNode *rootNode = cpuProfile->GetTopDownRoot();
189 d->printProfileTree(rootNode);
192 void QV8ProfilerServicePrivate::printProfileTree(const v8::CpuProfileNode *node, int level)
194 for (int index = 0 ; index < node->GetChildrenCount() ; index++) {
195 const v8::CpuProfileNode* childNode = node->GetChild(index);
196 if (QV8Engine::toStringStatic(childNode->GetScriptResourceName()).length() > 0) {
198 QV8ProfilerData rd = {(int)QV8ProfilerService::V8Entry, QV8Engine::toStringStatic(childNode->GetScriptResourceName()),
199 QV8Engine::toStringStatic(childNode->GetFunctionName()),
200 childNode->GetLineNumber(), childNode->GetTotalTime(), childNode->GetSelfTime(), level};
203 // different nodes might have common children: fix at client side
204 if (childNode->GetChildrenCount() > 0) {
205 printProfileTree(childNode, level+1);
211 void QV8ProfilerServicePrivate::takeSnapshot(v8::HeapSnapshot::Type snapshotType)
213 Q_Q(QV8ProfilerService);
215 v8::HandleScope scope;
216 v8::Local<v8::String> title = v8::String::New("");
218 QByteArray jsonSnapshot;
219 ByteArrayOutputStream bos(&jsonSnapshot);
220 const v8::HeapSnapshot *snapshot = v8::HeapProfiler::TakeSnapshot(title, snapshotType);
221 snapshot->Serialize(&bos, v8::HeapSnapshot::kJSON);
224 QDataStream ds(&data, QIODevice::WriteOnly);
225 ds << (int)QV8ProfilerService::V8Snapshot << jsonSnapshot;
227 q->sendMessage(data);
230 void QV8ProfilerServicePrivate::sendMessages()
232 Q_Q(QV8ProfilerService);
234 for (int i = 0; i < m_data.count(); ++i)
235 q->sendMessage(m_data.at(i).toByteArray());
238 //indicate completion
240 QDataStream ds(&data, QIODevice::WriteOnly);
241 ds << (int)QV8ProfilerService::V8Complete;
243 q->sendMessage(data);