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5 ** Contact: Nokia Corporation (qt-info@nokia.com)
7 ** This file is part of the QtDeclarative module of the Qt Toolkit.
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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/qjsconverter_impl_p.h"
45 #include <private/qv8profiler_p.h>
47 #include <QtCore/QHash>
51 Q_GLOBAL_STATIC(QV8ProfilerService, v8ProfilerInstance)
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()
91 void takeSnapshot(v8::HeapSnapshot::Type);
93 void printProfileTree(const v8::CpuProfileNode *node, int level = 0);
96 QList<QV8ProfilerData> m_data;
102 QV8ProfilerService::QV8ProfilerService(QObject *parent)
103 : QDeclarativeDebugService(*(new QV8ProfilerServicePrivate()), QLatin1String("V8Profiler"), parent)
105 Q_D(QV8ProfilerService);
107 if (registerService() == Enabled) {
108 // ,block mode, client attached
109 while (!d->initialized)
114 QV8ProfilerService::~QV8ProfilerService()
118 QV8ProfilerService *QV8ProfilerService::instance()
120 return v8ProfilerInstance();
123 void QV8ProfilerService::initialize()
125 // just make sure that the service is properly registered
126 v8ProfilerInstance();
129 void QV8ProfilerService::messageReceived(const QByteArray &message)
131 Q_D(QV8ProfilerService);
133 QDataStream ds(message);
137 ds >> command >> option;
140 d->isolate = v8::Isolate::New();
141 v8::Isolate::Scope scope(d->isolate);
142 v8::V8::Initialize();
145 v8::Isolate::Scope scope(d->isolate);
147 if (command == "V8PROFILER") {
149 if (option == "start") {
150 startProfiling(QString::fromUtf8(title));
151 } else if (option == "stop") {
152 stopProfiling(QString::fromUtf8(title));
155 d->initialized = true;
158 if (command == "V8SNAPSHOT") {
159 if (option == "full")
160 d->takeSnapshot(v8::HeapSnapshot::kFull);
161 else if (option == "delete") {
162 v8::HeapProfiler::DeleteAllSnapshots();
166 QDeclarativeDebugService::messageReceived(message);
169 void QV8ProfilerService::startProfiling(const QString &title)
172 v8::HandleScope handle_scope;
173 v8::Handle<v8::String> v8title = v8::String::New(reinterpret_cast<const uint16_t*>(title.data()), title.size());
174 v8::CpuProfiler::StartProfiling(v8title);
177 void QV8ProfilerService::stopProfiling(const QString &title)
179 Q_D(QV8ProfilerService);
181 v8::HandleScope handle_scope;
182 v8::Handle<v8::String> v8title = v8::String::New(reinterpret_cast<const uint16_t*>(title.data()), title.size());
183 const v8::CpuProfile *cpuProfile = v8::CpuProfiler::StopProfiling(v8title);
185 // can happen at start
186 const v8::CpuProfileNode *rootNode = cpuProfile->GetTopDownRoot();
187 d->printProfileTree(rootNode);
191 void QV8ProfilerService::sendProfilingData()
193 Q_D(QV8ProfilerService);
194 // Send messages to client
198 void QV8ProfilerServicePrivate::printProfileTree(const v8::CpuProfileNode *node, int level)
200 for (int index = 0 ; index < node->GetChildrenCount() ; index++) {
201 const v8::CpuProfileNode* childNode = node->GetChild(index);
202 QString scriptResourceName = QJSConverter::toString(childNode->GetScriptResourceName());
203 if (scriptResourceName.length() > 0) {
205 QV8ProfilerData rd = {(int)QV8ProfilerService::V8Entry, scriptResourceName,
206 QJSConverter::toString(childNode->GetFunctionName()),
207 childNode->GetLineNumber(), childNode->GetTotalTime(), childNode->GetSelfTime(), level};
210 // different nodes might have common children: fix at client side
211 if (childNode->GetChildrenCount() > 0) {
212 printProfileTree(childNode, level+1);
218 void QV8ProfilerServicePrivate::takeSnapshot(v8::HeapSnapshot::Type snapshotType)
220 Q_Q(QV8ProfilerService);
222 v8::HandleScope scope;
223 v8::Local<v8::String> title = v8::String::New("");
225 QByteArray jsonSnapshot;
226 ByteArrayOutputStream bos(&jsonSnapshot);
227 const v8::HeapSnapshot *snapshot = v8::HeapProfiler::TakeSnapshot(title, snapshotType);
228 snapshot->Serialize(&bos, v8::HeapSnapshot::kJSON);
231 QDataStream ds(&data, QIODevice::WriteOnly);
232 ds << (int)QV8ProfilerService::V8Snapshot << jsonSnapshot;
234 q->sendMessage(data);
237 void QV8ProfilerServicePrivate::sendMessages()
239 Q_Q(QV8ProfilerService);
241 for (int i = 0; i < m_data.count(); ++i)
242 q->sendMessage(m_data.at(i).toByteArray());
245 //indicate completion
247 QDataStream ds(&data, QIODevice::WriteOnly);
248 ds << (int)QV8ProfilerService::V8Complete;
250 q->sendMessage(data);