src/declarative/debugger/qv8profilerservice.cpp

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  41
  42 #include "qv8profilerservice_p.h"
  43 #include "qdeclarativedebugservice_p_p.h"
  44 #include "private/qjsconverter_impl_p.h"
  45 #include <private/qv8profiler_p.h>
  46
  47 #include <QtCore/QHash>
  48
  49 QT_BEGIN_NAMESPACE
  50
  51 Q_GLOBAL_STATIC(QV8ProfilerService, v8ProfilerInstance)
  52
  53 class DebugServiceOutputStream : public v8::OutputStream
  54 {
  55     QDeclarativeDebugService &_service;
  56 public:
  57     DebugServiceOutputStream(QDeclarativeDebugService &service)
  58         : v8::OutputStream(),
  59           _service(service) {}
  60     void EndOfStream() {}
  61     WriteResult WriteAsciiChunk(char *rawData, int size)
  62     {
  63         QByteArray data;
  64         QDataStream ds(&data, QIODevice::WriteOnly);
  65         ds << QV8ProfilerService::V8SnapshotChunk << QByteArray(rawData, size);
  66         _service.sendMessage(data);
  67         return kContinue;
  68     }
  69 };
  70
  71 // convert to a QByteArray that can be sent to the debug client
  72 QByteArray QV8ProfilerData::toByteArray() const
  73 {
  74     QByteArray data;
  75     //### using QDataStream is relatively expensive
  76     QDataStream ds(&data, QIODevice::WriteOnly);
  77     ds << messageType << filename << functionname << lineNumber << totalTime << selfTime << treeLevel;
  78
  79     return data;
  80 }
  81
  82 class QV8ProfilerServicePrivate : public QDeclarativeDebugServicePrivate
  83 {
  84     Q_DECLARE_PUBLIC(QV8ProfilerService)
  85
  86 public:
  87     QV8ProfilerServicePrivate()
  88         :initialized(false)
  89     {
  90     }
  91
  92     void takeSnapshot(v8::HeapSnapshot::Type);
  93
  94     void printProfileTree(const v8::CpuProfileNode *node, int level = 0);
  95     void sendMessages();
  96
  97     QList<QV8ProfilerData> m_data;
  98
  99     bool initialized;
 100 };
 101
 102 QV8ProfilerService::QV8ProfilerService(QObject *parent)
 103     : QDeclarativeDebugService(*(new QV8ProfilerServicePrivate()), QLatin1String("V8Profiler"), 1, parent)
 104 {
 105     Q_D(QV8ProfilerService);
 106
 107     if (registerService() == Enabled) {
 108         // ,block mode, client attached
 109         while (!d->initialized)
 110             waitForMessage();
 111     }
 112 }
 113
 114 QV8ProfilerService::~QV8ProfilerService()
 115 {
 116 }
 117
 118 QV8ProfilerService *QV8ProfilerService::instance()
 119 {
 120     return v8ProfilerInstance();
 121 }
 122
 123 void QV8ProfilerService::initialize()
 124 {
 125     // just make sure that the service is properly registered
 126     v8ProfilerInstance();
 127 }
 128
 129 void QV8ProfilerService::messageReceived(const QByteArray &message)
 130 {
 131     Q_D(QV8ProfilerService);
 132
 133     QDataStream ds(message);
 134     QByteArray command;
 135     QByteArray option;
 136     QByteArray title;
 137     ds >> command >> option;
 138
 139     if (command == "V8PROFILER") {
 140         ds >>  title;
 141         if (option == "start") {
 142             QMetaObject::invokeMethod(this, "startProfiling", Qt::QueuedConnection, Q_ARG(QString, QString::fromUtf8(title)));
 143         } else if (option == "stop") {
 144             QMetaObject::invokeMethod(this, "stopProfiling", Qt::QueuedConnection, Q_ARG(QString, QString::fromUtf8(title)));
 145             QMetaObject::invokeMethod(this, "sendProfilingData", Qt::QueuedConnection);
 146         }
 147         d->initialized = true;
 148     }
 149
 150     if (command == "V8SNAPSHOT") {
 151         if (option == "full")
 152             QMetaObject::invokeMethod(this, "takeSnapshot", Qt::QueuedConnection);
 153         else if (option == "delete") {
 154             QMetaObject::invokeMethod(this, "deleteSnapshots", Qt::QueuedConnection);
 155         }
 156     }
 157
 158     QDeclarativeDebugService::messageReceived(message);
 159 }
 160
 161 void QV8ProfilerService::startProfiling(const QString &title)
 162 {
 163     // Start Profiling
 164     v8::HandleScope handle_scope;
 165     v8::Handle<v8::String> v8title = v8::String::New(reinterpret_cast<const uint16_t*>(title.data()), title.size());
 166     v8::CpuProfiler::StartProfiling(v8title);
 167 }
 168
 169 void QV8ProfilerService::stopProfiling(const QString &title)
 170 {
 171     Q_D(QV8ProfilerService);
 172     // Stop profiling
 173     v8::HandleScope handle_scope;
 174     v8::Handle<v8::String> v8title = v8::String::New(reinterpret_cast<const uint16_t*>(title.data()), title.size());
 175     const v8::CpuProfile *cpuProfile = v8::CpuProfiler::StopProfiling(v8title);
 176     if (cpuProfile) {
 177         // can happen at start
 178         const v8::CpuProfileNode *rootNode = cpuProfile->GetTopDownRoot();
 179         d->printProfileTree(rootNode);
 180     }
 181 }
 182
 183 void QV8ProfilerService::takeSnapshot()
 184 {
 185     Q_D(QV8ProfilerService);
 186     d->takeSnapshot(v8::HeapSnapshot::kFull);
 187 }
 188
 189 void QV8ProfilerService::deleteSnapshots()
 190 {
 191     v8::HeapProfiler::DeleteAllSnapshots();
 192 }
 193
 194 void QV8ProfilerService::sendProfilingData()
 195 {
 196     Q_D(QV8ProfilerService);
 197     // Send messages to client
 198     d->sendMessages();
 199 }
 200
 201 void QV8ProfilerServicePrivate::printProfileTree(const v8::CpuProfileNode *node, int level)
 202 {
 203     for (int index = 0 ; index < node->GetChildrenCount() ; index++) {
 204         const v8::CpuProfileNode* childNode = node->GetChild(index);
 205         QString scriptResourceName = QJSConverter::toString(childNode->GetScriptResourceName());
 206         if (scriptResourceName.length() > 0) {
 207
 208             QV8ProfilerData rd = {(int)QV8ProfilerService::V8Entry, scriptResourceName,
 209                 QJSConverter::toString(childNode->GetFunctionName()),
 210                 childNode->GetLineNumber(), childNode->GetTotalTime(), childNode->GetSelfTime(), level};
 211             m_data.append(rd);
 212
 213             // different nodes might have common children: fix at client side
 214             if (childNode->GetChildrenCount() > 0) {
 215                 printProfileTree(childNode, level+1);
 216             }
 217         }
 218     }
 219 }
 220
 221 void QV8ProfilerServicePrivate::takeSnapshot(v8::HeapSnapshot::Type snapshotType)
 222 {
 223     Q_Q(QV8ProfilerService);
 224
 225     v8::HandleScope scope;
 226     v8::Local<v8::String> title = v8::String::New("");
 227
 228     DebugServiceOutputStream outputStream(*q);
 229     const v8::HeapSnapshot *snapshot = v8::HeapProfiler::TakeSnapshot(title, snapshotType);
 230     snapshot->Serialize(&outputStream, v8::HeapSnapshot::kJSON);
 231
 232     //indicate completion
 233     QByteArray data;
 234     QDataStream ds(&data, QIODevice::WriteOnly);
 235     ds << (int)QV8ProfilerService::V8SnapshotComplete;
 236
 237     q->sendMessage(data);
 238 }
 239
 240 void QV8ProfilerServicePrivate::sendMessages()
 241 {
 242     Q_Q(QV8ProfilerService);
 243
 244     QList<QByteArray> messages;
 245     for (int i = 0; i < m_data.count(); ++i)
 246         messages << m_data.at(i).toByteArray();
 247     q->sendMessages(messages);
 248     m_data.clear();
 249
 250     //indicate completion
 251     QByteArray data;
 252     QDataStream ds(&data, QIODevice::WriteOnly);
 253     ds << (int)QV8ProfilerService::V8Complete;
 254
 255     q->sendMessage(data);
 256 }
 257
 258
 259 QT_END_NAMESPACE