1 /* 2 * Copyright (c) 2011, Google Inc. All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions are 6 * met: 7 * 8 * * Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * * Redistributions in binary form must reproduce the above 11 * copyright notice, this list of conditions and the following disclaimer 12 * in the documentation and/or other materials provided with the 13 * distribution. 14 * * Neither the name of Google Inc. nor the names of its 15 * contributors may be used to endorse or promote products derived from 16 * this software without specific prior written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 21 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 22 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 23 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 24 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 29 */ 30 31 #include "config.h" 32 #include "bindings/v8/ScriptProfiler.h" 33 34 #include "bindings/core/v8/V8Node.h" 35 #include "bindings/core/v8/V8Window.h" 36 #include "bindings/v8/RetainedDOMInfo.h" 37 #include "bindings/v8/ScriptValue.h" 38 #include "bindings/v8/V8Binding.h" 39 #include "bindings/v8/WrapperTypeInfo.h" 40 #include "core/dom/Document.h" 41 #include "core/inspector/BindingVisitors.h" 42 43 #include <v8-profiler.h> 44 #include <v8.h> 45 46 #include "wtf/ThreadSpecific.h" 47 48 namespace WebCore { 49 50 typedef HashMap<String, double> ProfileNameIdleTimeMap; 51 52 void ScriptProfiler::setSamplingInterval(int intervalUs) 53 { 54 v8::Isolate* isolate = v8::Isolate::GetCurrent(); 55 v8::CpuProfiler* profiler = isolate->GetCpuProfiler(); 56 if (profiler) 57 profiler->SetSamplingInterval(intervalUs); 58 } 59 60 void ScriptProfiler::start(const String& title) 61 { 62 ProfileNameIdleTimeMap* profileNameIdleTimeMap = ScriptProfiler::currentProfileNameIdleTimeMap(); 63 if (profileNameIdleTimeMap->contains(title)) 64 return; 65 profileNameIdleTimeMap->add(title, 0); 66 67 v8::Isolate* isolate = v8::Isolate::GetCurrent(); 68 v8::CpuProfiler* profiler = isolate->GetCpuProfiler(); 69 if (!profiler) 70 return; 71 v8::HandleScope handleScope(isolate); 72 profiler->StartProfiling(v8String(isolate, title), true); 73 } 74 75 PassRefPtrWillBeRawPtr<ScriptProfile> ScriptProfiler::stop(const String& title) 76 { 77 v8::Isolate* isolate = v8::Isolate::GetCurrent(); 78 v8::CpuProfiler* profiler = isolate->GetCpuProfiler(); 79 if (!profiler) 80 return nullptr; 81 v8::HandleScope handleScope(isolate); 82 v8::CpuProfile* profile = profiler->StopProfiling(v8String(isolate, title)); 83 if (!profile) 84 return nullptr; 85 86 String profileTitle = toCoreString(profile->GetTitle()); 87 double idleTime = 0.0; 88 ProfileNameIdleTimeMap* profileNameIdleTimeMap = ScriptProfiler::currentProfileNameIdleTimeMap(); 89 ProfileNameIdleTimeMap::iterator profileIdleTime = profileNameIdleTimeMap->find(profileTitle); 90 if (profileIdleTime != profileNameIdleTimeMap->end()) { 91 idleTime = profileIdleTime->value * 1000.0; 92 profileNameIdleTimeMap->remove(profileIdleTime); 93 } 94 95 return ScriptProfile::create(profile, idleTime); 96 } 97 98 void ScriptProfiler::collectGarbage() 99 { 100 v8::V8::LowMemoryNotification(); 101 } 102 103 ScriptValue ScriptProfiler::objectByHeapObjectId(unsigned id) 104 { 105 v8::Isolate* isolate = v8::Isolate::GetCurrent(); 106 v8::HeapProfiler* profiler = isolate->GetHeapProfiler(); 107 v8::HandleScope handleScope(isolate); 108 v8::Handle<v8::Value> value = profiler->FindObjectById(id); 109 if (value.IsEmpty() || !value->IsObject()) 110 return ScriptValue(); 111 112 v8::Handle<v8::Object> object = value.As<v8::Object>(); 113 114 if (object->InternalFieldCount() >= v8DefaultWrapperInternalFieldCount) { 115 v8::Handle<v8::Value> wrapper = object->GetInternalField(v8DOMWrapperObjectIndex); 116 // Skip wrapper boilerplates which are like regular wrappers but don't have 117 // native object. 118 if (!wrapper.IsEmpty() && wrapper->IsUndefined()) 119 return ScriptValue(); 120 } 121 122 ScriptState* scriptState = ScriptState::from(object->CreationContext()); 123 return ScriptValue(scriptState, object); 124 } 125 126 unsigned ScriptProfiler::getHeapObjectId(const ScriptValue& value) 127 { 128 v8::Isolate* isolate = v8::Isolate::GetCurrent(); 129 v8::HeapProfiler* profiler = isolate->GetHeapProfiler(); 130 v8::SnapshotObjectId id = profiler->GetObjectId(value.v8Value()); 131 return id; 132 } 133 134 void ScriptProfiler::clearHeapObjectIds() 135 { 136 v8::Isolate* isolate = v8::Isolate::GetCurrent(); 137 v8::HeapProfiler* profiler = isolate->GetHeapProfiler(); 138 profiler->ClearObjectIds(); 139 } 140 141 namespace { 142 143 class ActivityControlAdapter FINAL : public v8::ActivityControl { 144 public: 145 ActivityControlAdapter(ScriptProfiler::HeapSnapshotProgress* progress) 146 : m_progress(progress), m_firstReport(true) { } 147 virtual ControlOption ReportProgressValue(int done, int total) OVERRIDE 148 { 149 ControlOption result = m_progress->isCanceled() ? kAbort : kContinue; 150 if (m_firstReport) { 151 m_firstReport = false; 152 m_progress->Start(total); 153 } else 154 m_progress->Worked(done); 155 if (done >= total) 156 m_progress->Done(); 157 return result; 158 } 159 private: 160 ScriptProfiler::HeapSnapshotProgress* m_progress; 161 bool m_firstReport; 162 }; 163 164 class GlobalObjectNameResolver FINAL : public v8::HeapProfiler::ObjectNameResolver { 165 public: 166 virtual const char* GetName(v8::Handle<v8::Object> object) OVERRIDE 167 { 168 LocalDOMWindow* window = toDOMWindow(object, v8::Isolate::GetCurrent()); 169 if (!window) 170 return 0; 171 CString url = window->document()->url().string().utf8(); 172 m_strings.append(url); 173 return url.data(); 174 } 175 176 private: 177 Vector<CString> m_strings; 178 }; 179 180 } // namespace 181 182 void ScriptProfiler::startTrackingHeapObjects(bool trackAllocations) 183 { 184 v8::Isolate::GetCurrent()->GetHeapProfiler()->StartTrackingHeapObjects(trackAllocations); 185 } 186 187 namespace { 188 189 class HeapStatsStream : public v8::OutputStream { 190 public: 191 HeapStatsStream(ScriptProfiler::OutputStream* stream) : m_stream(stream) { } 192 virtual void EndOfStream() OVERRIDE { } 193 194 virtual WriteResult WriteAsciiChunk(char* data, int size) OVERRIDE 195 { 196 ASSERT(false); 197 return kAbort; 198 } 199 200 virtual WriteResult WriteHeapStatsChunk(v8::HeapStatsUpdate* updateData, int count) OVERRIDE 201 { 202 Vector<uint32_t> rawData(count * 3); 203 for (int i = 0; i < count; ++i) { 204 int offset = i * 3; 205 rawData[offset] = updateData[i].index; 206 rawData[offset + 1] = updateData[i].count; 207 rawData[offset + 2] = updateData[i].size; 208 } 209 m_stream->write(rawData.data(), rawData.size()); 210 return kContinue; 211 } 212 213 private: 214 ScriptProfiler::OutputStream* m_stream; 215 }; 216 217 } 218 219 unsigned ScriptProfiler::requestHeapStatsUpdate(ScriptProfiler::OutputStream* stream) 220 { 221 HeapStatsStream heapStatsStream(stream); 222 return v8::Isolate::GetCurrent()->GetHeapProfiler()->GetHeapStats(&heapStatsStream); 223 } 224 225 void ScriptProfiler::stopTrackingHeapObjects() 226 { 227 v8::Isolate::GetCurrent()->GetHeapProfiler()->StopTrackingHeapObjects(); 228 } 229 230 // FIXME: This method should receive a ScriptState, from which we should retrieve an Isolate. 231 PassRefPtr<ScriptHeapSnapshot> ScriptProfiler::takeHeapSnapshot(const String& title, HeapSnapshotProgress* control) 232 { 233 v8::Isolate* isolate = v8::Isolate::GetCurrent(); 234 v8::HeapProfiler* profiler = isolate->GetHeapProfiler(); 235 if (!profiler) 236 return nullptr; 237 v8::HandleScope handleScope(isolate); 238 ASSERT(control); 239 ActivityControlAdapter adapter(control); 240 GlobalObjectNameResolver resolver; 241 const v8::HeapSnapshot* snapshot = profiler->TakeHeapSnapshot(v8String(isolate, title), &adapter, &resolver); 242 return snapshot ? ScriptHeapSnapshot::create(snapshot) : nullptr; 243 } 244 245 static v8::RetainedObjectInfo* retainedDOMInfo(uint16_t classId, v8::Handle<v8::Value> wrapper) 246 { 247 ASSERT(classId == v8DOMNodeClassId); 248 if (!wrapper->IsObject()) 249 return 0; 250 Node* node = V8Node::toNative(wrapper.As<v8::Object>()); 251 return node ? new RetainedDOMInfo(node) : 0; 252 } 253 254 void ScriptProfiler::initialize() 255 { 256 v8::Isolate* isolate = v8::Isolate::GetCurrent(); 257 v8::HeapProfiler* profiler = isolate->GetHeapProfiler(); 258 if (profiler) 259 profiler->SetWrapperClassInfoProvider(v8DOMNodeClassId, &retainedDOMInfo); 260 } 261 262 void ScriptProfiler::visitNodeWrappers(WrappedNodeVisitor* visitor) 263 { 264 // visitNodeWrappers() should receive a ScriptState and retrieve an Isolate 265 // from the ScriptState. 266 v8::Isolate* isolate = v8::Isolate::GetCurrent(); 267 v8::HandleScope handleScope(isolate); 268 269 class DOMNodeWrapperVisitor : public v8::PersistentHandleVisitor { 270 public: 271 DOMNodeWrapperVisitor(WrappedNodeVisitor* visitor, v8::Isolate* isolate) 272 : m_visitor(visitor) 273 , m_isolate(isolate) 274 { 275 } 276 277 virtual void VisitPersistentHandle(v8::Persistent<v8::Value>* value, uint16_t classId) OVERRIDE 278 { 279 if (classId != v8DOMNodeClassId) 280 return; 281 // Casting to Handle is safe here, since the Persistent cannot get 282 // GCd during visiting. 283 v8::Handle<v8::Object>* wrapper = reinterpret_cast<v8::Handle<v8::Object>*>(value); 284 ASSERT_UNUSED(m_isolate, V8Node::hasInstance(*wrapper, m_isolate)); 285 ASSERT((*wrapper)->IsObject()); 286 m_visitor->visitNode(V8Node::toNative(*wrapper)); 287 } 288 289 private: 290 WrappedNodeVisitor* m_visitor; 291 v8::Isolate* m_isolate; 292 } wrapperVisitor(visitor, isolate); 293 294 v8::V8::VisitHandlesWithClassIds(&wrapperVisitor); 295 } 296 297 ProfileNameIdleTimeMap* ScriptProfiler::currentProfileNameIdleTimeMap() 298 { 299 AtomicallyInitializedStatic(WTF::ThreadSpecific<ProfileNameIdleTimeMap>*, map = new WTF::ThreadSpecific<ProfileNameIdleTimeMap>); 300 return *map; 301 } 302 303 void ScriptProfiler::setIdle(bool isIdle) 304 { 305 v8::Isolate* isolate = v8::Isolate::GetCurrent(); 306 if (v8::CpuProfiler* profiler = isolate->GetCpuProfiler()) 307 profiler->SetIdle(isIdle); 308 } 309 310 } // namespace WebCore 311