src/declarative/debugger/qv8profilerservice.cpp

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  41
  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"
  47
  48 #include <QtCore/QHash>
  49
  50 QT_BEGIN_NAMESPACE
  51
  52 Q_GLOBAL_STATIC(QV8ProfilerService, v8ServiceInstance)
  53
  54 class ByteArrayOutputStream : public v8::OutputStream
  55 {
  56     QByteArray *_buffer;
  57 public:
  58     ByteArrayOutputStream(QByteArray *buffer)
  59         : v8::OutputStream(),
  60           _buffer(buffer) {}
  61     void EndOfStream() {}
  62     WriteResult WriteAsciiChunk(char *data, int size)
  63     {
  64         QByteArray b(data, size);
  65         _buffer->append(b);
  66         return kContinue;
  67     }
  68 };
  69
  70 // convert to a QByteArray that can be sent to the debug client
  71 QByteArray QV8ProfilerData::toByteArray() const
  72 {
  73     QByteArray data;
  74     //### using QDataStream is relatively expensive
  75     QDataStream ds(&data, QIODevice::WriteOnly);
  76     ds << messageType << filename << functionname << lineNumber << totalTime << selfTime << treeLevel;
  77
  78     return data;
  79 }
  80
  81 class QV8ProfilerServicePrivate : public QDeclarativeDebugServicePrivate
  82 {
  83     Q_DECLARE_PUBLIC(QV8ProfilerService)
  84
  85 public:
  86     QV8ProfilerServicePrivate()
  87         :initialized(false)
  88     {
  89     }
  90
  91     void takeSnapshot(v8::HeapSnapshot::Type);
  92
  93     void printProfileTree(const v8::CpuProfileNode *node, int level = 0);
  94     void sendMessages();
  95
  96     QList<QV8ProfilerData> m_data;
  97
  98     bool initialized;
  99     QList<QDeclarativeEngine *> engines;
 100 };
 101
 102 QV8ProfilerService::QV8ProfilerService(QObject *parent)
 103     : QDeclarativeDebugService(*(new QV8ProfilerServicePrivate()), QLatin1String("V8Profiler"), parent)
 104 {
 105     Q_D(QV8ProfilerService);
 106     if (status() == Enabled) {
 107         // ,block mode, client attached
 108         while (!d->initialized)
 109             waitForMessage();
 110     }
 111 }
 112
 113 QV8ProfilerService::~QV8ProfilerService()
 114 {
 115 }
 116
 117 QV8ProfilerService *QV8ProfilerService::instance()
 118 {
 119     return v8ServiceInstance();
 120 }
 121
 122 void QV8ProfilerService::addEngine(QDeclarativeEngine *engine)
 123 {
 124     Q_D(QV8ProfilerService);
 125     Q_ASSERT(engine);
 126     Q_ASSERT(!d->engines.contains(engine));
 127
 128     d->engines.append(engine);
 129 }
 130
 131 void QV8ProfilerService::removeEngine(QDeclarativeEngine *engine)
 132 {
 133     Q_D(QV8ProfilerService);
 134     Q_ASSERT(engine);
 135     Q_ASSERT(d->engines.contains(engine));
 136
 137     d->engines.removeOne(engine);
 138 }
 139
 140 void QV8ProfilerService::messageReceived(const QByteArray &message)
 141 {
 142     Q_D(QV8ProfilerService);
 143
 144     QDataStream ds(message);
 145     QByteArray command;
 146     QByteArray option;
 147     QByteArray title;
 148     ds >> command >> option;
 149
 150     if (command == "V8PROFILER") {
 151         ds >>  title;
 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
 158             d->sendMessages();
 159         }
 160     }
 161
 162     if (command == "V8SNAPSHOT") {
 163             QByteArray snapshotType;
 164             ds >> snapshotType;
 165
 166             if (snapshotType == "aggregated")
 167                 d->takeSnapshot(v8::HeapSnapshot::kAggregated);
 168             else if (snapshotType == "full")
 169                 d->takeSnapshot(v8::HeapSnapshot::kFull);
 170         } else if (command == "deletesnapshots") {
 171             v8::HeapProfiler::DeleteAllSnapshots();
 172         }
 173
 174     QDeclarativeDebugService::messageReceived(message);
 175 }
 176
 177 void QV8ProfilerService::startProfiling(const QString &title)
 178 {
 179     // Start Profiling
 180     v8::HandleScope handle_scope;
 181     v8::Handle<v8::String> v8title = v8::String::New(reinterpret_cast<const uint16_t*>(title.data()), title.size());
 182     v8::CpuProfiler::StartProfiling(v8title);
 183 }
 184
 185 void QV8ProfilerService::stopProfiling(const QString &title)
 186 {
 187     Q_D(QV8ProfilerService);
 188     // Stop profiling
 189     v8::HandleScope handle_scope;
 190     v8::Handle<v8::String> v8title = v8::String::New(reinterpret_cast<const uint16_t*>(title.data()), title.size());
 191     const v8::CpuProfile *cpuProfile = v8::CpuProfiler::StopProfiling(v8title);
 192     const v8::CpuProfileNode *rootNode = cpuProfile->GetTopDownRoot();
 193
 194     d->printProfileTree(rootNode);
 195 }
 196
 197 void QV8ProfilerServicePrivate::printProfileTree(const v8::CpuProfileNode *node, int level)
 198 {
 199     for (int index = 0 ; index < node->GetChildrenCount() ; index++) {
 200         const v8::CpuProfileNode* childNode = node->GetChild(index);
 201         if (QV8Engine::toStringStatic(childNode->GetScriptResourceName()).length() > 0) {
 202
 203             QV8ProfilerData rd = {(int)QV8ProfilerService::V8Entry, QV8Engine::toStringStatic(childNode->GetScriptResourceName()),
 204                 QV8Engine::toStringStatic(childNode->GetFunctionName()),
 205                 childNode->GetLineNumber(), childNode->GetTotalTime(), childNode->GetSelfTime(), level};
 206             m_data.append(rd);
 207
 208             // different nodes might have common children: fix at client side
 209             if (childNode->GetChildrenCount() > 0) {
 210                 printProfileTree(childNode, level+1);
 211             }
 212         }
 213     }
 214 }
 215
 216 void QV8ProfilerServicePrivate::takeSnapshot(v8::HeapSnapshot::Type snapshotType)
 217 {
 218     Q_Q(QV8ProfilerService);
 219
 220     v8::HandleScope scope;
 221     v8::Local<v8::String> title = v8::String::New("");
 222
 223     const v8::HeapSnapshot *snapshot = v8::HeapProfiler::TakeSnapshot(title, snapshotType);
 224
 225     QByteArray data;
 226     QDataStream ds(&data, QIODevice::WriteOnly);
 227     ds << (int)QV8ProfilerService::V8Snapshot;
 228
 229     ByteArrayOutputStream bos(&data);
 230     snapshot->Serialize(&bos, v8::HeapSnapshot::kJSON);
 231
 232     q->sendMessage(data);
 233 }
 234
 235 void QV8ProfilerServicePrivate::sendMessages()
 236 {
 237     Q_Q(QV8ProfilerService);
 238
 239     for (int i = 0; i < m_data.count(); ++i)
 240         q->sendMessage(m_data.at(i).toByteArray());
 241     m_data.clear();
 242
 243     //indicate completion
 244     QByteArray data;
 245     QDataStream ds(&data, QIODevice::WriteOnly);
 246     ds << (int)QV8ProfilerService::V8Complete;
 247
 248     q->sendMessage(data);
 249 }
 250
 251
 252 QT_END_NAMESPACE