src/declarative/debugger/qv8profilerservice.cpp

   1 /****************************************************************************
   2 **
   3 ** Copyright (C) 2011 Nokia Corporation and/or its subsidiary(-ies).
   4 ** All rights reserved.
   5 ** Contact: Nokia Corporation (qt-info@nokia.com)
   6 **
   7 ** This file is part of the QtDeclarative module of the Qt Toolkit.
   8 **
   9 ** $QT_BEGIN_LICENSE:LGPL$
  10 ** GNU Lesser General Public License Usage
  11 ** This file may be used under the terms of the GNU Lesser General Public
  12 ** License version 2.1 as published by the Free Software Foundation and
  13 ** appearing in the file LICENSE.LGPL included in the packaging of this
  14 ** file. Please review the following information to ensure the GNU Lesser
  15 ** General Public License version 2.1 requirements will be met:
  16 ** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
  17 **
  18 ** In addition, as a special exception, Nokia gives you certain additional
  19 ** rights. These rights are described in the Nokia Qt LGPL Exception
  20 ** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
  21 **
  22 ** GNU General Public License Usage
  23 ** Alternatively, this file may be used under the terms of the GNU General
  24 ** Public License version 3.0 as published by the Free Software Foundation
  25 ** and appearing in the file LICENSE.GPL included in the packaging of this
  26 ** file. Please review the following information to ensure the GNU General
  27 ** Public License version 3.0 requirements will be met:
  28 ** http://www.gnu.org/copyleft/gpl.html.
  29 **
  30 ** Other Usage
  31 ** Alternatively, this file may be used in accordance with the terms and
  32 ** conditions contained in a signed written agreement between you and Nokia.
  33 **
  34 **
  35 **
  36 **
  37 **
  38 ** $QT_END_LICENSE$
  39 **
  40 ****************************************************************************/
  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 ByteArrayOutputStream : public v8::OutputStream
  54 {
  55     QByteArray *_buffer;
  56 public:
  57     ByteArrayOutputStream(QByteArray *buffer)
  58         : v8::OutputStream(),
  59           _buffer(buffer) {}
  60     void EndOfStream() {}
  61     WriteResult WriteAsciiChunk(char *data, int size)
  62     {
  63         QByteArray b(data, size);
  64         _buffer->append(b);
  65         return kContinue;
  66     }
  67 };
  68
  69 // convert to a QByteArray that can be sent to the debug client
  70 QByteArray QV8ProfilerData::toByteArray() const
  71 {
  72     QByteArray data;
  73     //### using QDataStream is relatively expensive
  74     QDataStream ds(&data, QIODevice::WriteOnly);
  75     ds << messageType << filename << functionname << lineNumber << totalTime << selfTime << treeLevel;
  76
  77     return data;
  78 }
  79
  80 class QV8ProfilerServicePrivate : public QDeclarativeDebugServicePrivate
  81 {
  82     Q_DECLARE_PUBLIC(QV8ProfilerService)
  83
  84 public:
  85     QV8ProfilerServicePrivate()
  86         :initialized(false)
  87     {
  88     }
  89
  90     void takeSnapshot(v8::HeapSnapshot::Type);
  91
  92     void printProfileTree(const v8::CpuProfileNode *node, int level = 0);
  93     void sendMessages();
  94
  95     QList<QV8ProfilerData> m_data;
  96
  97     bool initialized;
  98 };
  99
 100 QV8ProfilerService::QV8ProfilerService(QObject *parent)
 101     : QDeclarativeDebugService(*(new QV8ProfilerServicePrivate()), QLatin1String("V8Profiler"), parent)
 102 {
 103     Q_D(QV8ProfilerService);
 104
 105     if (registerService() == Enabled) {
 106         // ,block mode, client attached
 107         while (!d->initialized)
 108             waitForMessage();
 109     }
 110 }
 111
 112 QV8ProfilerService::~QV8ProfilerService()
 113 {
 114 }
 115
 116 QV8ProfilerService *QV8ProfilerService::instance()
 117 {
 118     return v8ProfilerInstance();
 119 }
 120
 121 void QV8ProfilerService::initialize()
 122 {
 123     // just make sure that the service is properly registered
 124     v8ProfilerInstance();
 125 }
 126
 127 void QV8ProfilerService::messageReceived(const QByteArray &message)
 128 {
 129     Q_D(QV8ProfilerService);
 130
 131     QDataStream ds(message);
 132     QByteArray command;
 133     QByteArray option;
 134     QByteArray title;
 135     ds >> command >> option;
 136
 137     if (command == "V8PROFILER") {
 138         ds >>  title;
 139         if (option == "start") {
 140             QMetaObject::invokeMethod(this, "startProfiling", Qt::QueuedConnection, Q_ARG(QString, QString::fromUtf8(title)));
 141         } else if (option == "stop") {
 142             QMetaObject::invokeMethod(this, "stopProfiling", Qt::QueuedConnection, Q_ARG(QString, QString::fromUtf8(title)));
 143             QMetaObject::invokeMethod(this, "sendProfilingData", Qt::QueuedConnection);
 144         }
 145         d->initialized = true;
 146     }
 147
 148     if (command == "V8SNAPSHOT") {
 149         if (option == "full")
 150             QMetaObject::invokeMethod(this, "takeSnapshot", Qt::QueuedConnection);
 151         else if (option == "delete") {
 152             QMetaObject::invokeMethod(this, "deleteSnapshots", Qt::QueuedConnection);
 153         }
 154     }
 155
 156     QDeclarativeDebugService::messageReceived(message);
 157 }
 158
 159 void QV8ProfilerService::startProfiling(const QString &title)
 160 {
 161     // Start Profiling
 162     v8::HandleScope handle_scope;
 163     v8::Handle<v8::String> v8title = v8::String::New(reinterpret_cast<const uint16_t*>(title.data()), title.size());
 164     v8::CpuProfiler::StartProfiling(v8title);
 165 }
 166
 167 void QV8ProfilerService::stopProfiling(const QString &title)
 168 {
 169     Q_D(QV8ProfilerService);
 170     // Stop profiling
 171     v8::HandleScope handle_scope;
 172     v8::Handle<v8::String> v8title = v8::String::New(reinterpret_cast<const uint16_t*>(title.data()), title.size());
 173     const v8::CpuProfile *cpuProfile = v8::CpuProfiler::StopProfiling(v8title);
 174     if (cpuProfile) {
 175         // can happen at start
 176         const v8::CpuProfileNode *rootNode = cpuProfile->GetTopDownRoot();
 177         d->printProfileTree(rootNode);
 178     }
 179 }
 180
 181 void QV8ProfilerService::takeSnapshot()
 182 {
 183     Q_D(QV8ProfilerService);
 184     d->takeSnapshot(v8::HeapSnapshot::kFull);
 185 }
 186
 187 void QV8ProfilerService::deleteSnapshots()
 188 {
 189     v8::HeapProfiler::DeleteAllSnapshots();
 190 }
 191
 192 void QV8ProfilerService::sendProfilingData()
 193 {
 194     Q_D(QV8ProfilerService);
 195     // Send messages to client
 196     d->sendMessages();
 197 }
 198
 199 void QV8ProfilerServicePrivate::printProfileTree(const v8::CpuProfileNode *node, int level)
 200 {
 201     for (int index = 0 ; index < node->GetChildrenCount() ; index++) {
 202         const v8::CpuProfileNode* childNode = node->GetChild(index);
 203         QString scriptResourceName = QJSConverter::toString(childNode->GetScriptResourceName());
 204         if (scriptResourceName.length() > 0) {
 205
 206             QV8ProfilerData rd = {(int)QV8ProfilerService::V8Entry, scriptResourceName,
 207                 QJSConverter::toString(childNode->GetFunctionName()),
 208                 childNode->GetLineNumber(), childNode->GetTotalTime(), childNode->GetSelfTime(), level};
 209             m_data.append(rd);
 210
 211             // different nodes might have common children: fix at client side
 212             if (childNode->GetChildrenCount() > 0) {
 213                 printProfileTree(childNode, level+1);
 214             }
 215         }
 216     }
 217 }
 218
 219 void QV8ProfilerServicePrivate::takeSnapshot(v8::HeapSnapshot::Type snapshotType)
 220 {
 221     Q_Q(QV8ProfilerService);
 222
 223     v8::HandleScope scope;
 224     v8::Local<v8::String> title = v8::String::New("");
 225
 226     QByteArray jsonSnapshot;
 227     ByteArrayOutputStream bos(&jsonSnapshot);
 228     const v8::HeapSnapshot *snapshot = v8::HeapProfiler::TakeSnapshot(title, snapshotType);
 229     snapshot->Serialize(&bos, v8::HeapSnapshot::kJSON);
 230
 231     QByteArray data;
 232     QDataStream ds(&data, QIODevice::WriteOnly);
 233     ds << (int)QV8ProfilerService::V8Snapshot << jsonSnapshot;
 234
 235     q->sendMessage(data);
 236 }
 237
 238 void QV8ProfilerServicePrivate::sendMessages()
 239 {
 240     Q_Q(QV8ProfilerService);
 241
 242     for (int i = 0; i < m_data.count(); ++i)
 243         q->sendMessage(m_data.at(i).toByteArray());
 244     m_data.clear();
 245
 246     //indicate completion
 247     QByteArray data;
 248     QDataStream ds(&data, QIODevice::WriteOnly);
 249     ds << (int)QV8ProfilerService::V8Complete;
 250
 251     q->sendMessage(data);
 252 }
 253
 254
 255 QT_END_NAMESPACE