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| 1 /* | |
| 2 * Copyright (C) 2012 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 #include "config.h" | |
| 31 #include "bindings/core/dart/DartGCController.h" | |
| 32 | |
| 33 #include "core/HTMLNames.h" | |
| 34 #include "bindings/core/dart/DartDOMData.h" | |
| 35 #include "bindings/core/dart/DartDOMWrapper.h" | |
| 36 #include "bindings/core/dart/DartEventListener.h" | |
| 37 #include "bindings/core/dart/DartUtilities.h" | |
| 38 #include "core/dom/ActiveDOMObject.h" | |
| 39 #include "core/dom/Attr.h" | |
| 40 #include "core/dom/Document.h" | |
| 41 #include "core/dom/Node.h" | |
| 42 #include "core/frame/LocalDOMWindow.h" | |
| 43 #include "core/html/HTMLImageElement.h" | |
| 44 | |
| 45 #include <wtf/Vector.h> | |
| 46 | |
| 47 namespace blink { | |
| 48 | |
| 49 typedef HashMap<Node*, Dart_WeakReferenceSet> WeakReferenceSetForRootMap; | |
| 50 | |
| 51 static Node* calculateRootNode(Node*); | |
| 52 static void collectEventListenerWrappers(EventTarget*, Dart_WeakReferenceSet); | |
| 53 | |
| 54 static void createWeakReferenceSetForNode( | |
| 55 DartDOMData* domData, | |
| 56 Dart_WeakReferenceSetBuilder setBuilder, | |
| 57 Node* node, | |
| 58 Dart_WeakPersistentHandle wrapper, | |
| 59 WeakReferenceSetForRootMap* weakReferenceSetForRootMap) | |
| 60 { | |
| 61 Dart_WeakReferenceSet weakReferenceSet = 0; | |
| 62 ASSERT(node); | |
| 63 | |
| 64 Node* root = 0; | |
| 65 if (node->inDocument() || (node->hasTagName(HTMLNames::imgTag) && static_cas
t<HTMLImageElement*>(node)->hasPendingActivity())) { | |
| 66 root = &node->document(); | |
| 67 } else { | |
| 68 root = calculateRootNode(node); | |
| 69 if (!root) | |
| 70 return; | |
| 71 } | |
| 72 ASSERT(root); | |
| 73 | |
| 74 Document* document = static_cast<Document*>(domData->scriptExecutionContext(
)); | |
| 75 if (root == document) { | |
| 76 weakReferenceSet = domData->documentWeakReferenceSet(); | |
| 77 Dart_AppendToWeakReferenceSet(weakReferenceSet, wrapper, wrapper); | |
| 78 } else { | |
| 79 WeakReferenceSetForRootMap::const_iterator weakReferenceSetIterator = we
akReferenceSetForRootMap->find(root); | |
| 80 if (weakReferenceSetIterator != weakReferenceSetForRootMap->end()) { | |
| 81 weakReferenceSet = weakReferenceSetIterator->value; | |
| 82 Dart_AppendToWeakReferenceSet(weakReferenceSet, wrapper, wrapper); | |
| 83 } | |
| 84 else { | |
| 85 weakReferenceSet = Dart_NewWeakReferenceSet(setBuilder, wrapper, wra
pper); | |
| 86 weakReferenceSetForRootMap->set(root, weakReferenceSet); | |
| 87 } | |
| 88 } | |
| 89 EventTarget* eventTarget = node; | |
| 90 if (eventTarget->hasEventListeners()) | |
| 91 collectEventListenerWrappers(node, weakReferenceSet); | |
| 92 } | |
| 93 | |
| 94 static void collectRetainedActiveDOMObjectWrappers(DartDOMData* domData, Dart_We
akReferenceSet set) | |
| 95 { | |
| 96 DartMessagePortMap* messagePortMap = domData->messagePortMap(); | |
| 97 for (DartMessagePortMap::const_iterator it = messagePortMap->begin(); it !=
messagePortMap->end(); ++it) { | |
| 98 MessagePort* messagePort = it->key; | |
| 99 if (messagePort->isEntangled() || messagePort->hasPendingActivity()) { | |
| 100 Dart_AppendValueToWeakReferenceSet(set, it->value); | |
| 101 } | |
| 102 } | |
| 103 } | |
| 104 | |
| 105 static Node* calculateRootNode(Node* node) | |
| 106 { | |
| 107 Node* root = node; | |
| 108 if (node->isAttributeNode()) { | |
| 109 root = static_cast<Attr*>(node)->ownerElement(); | |
| 110 // If the attribute has no element, no need to put it in the group, | |
| 111 // because it'll always be a group of 1. | |
| 112 if (!root) | |
| 113 return 0; | |
| 114 } else { | |
| 115 while (Node* parent = root->parentOrShadowHostOrTemplateHostNode()) | |
| 116 root = parent; | |
| 117 } | |
| 118 return root; | |
| 119 } | |
| 120 | |
| 121 static void collectEventListenerWrappers(EventTarget* eventTarget, Dart_WeakRefe
renceSet weakReferenceSet) | |
| 122 { | |
| 123 EventListenerIterator iterator(eventTarget); | |
| 124 while (EventListener* listener = iterator.nextListener()) { | |
| 125 if (static_cast<int>(listener->type()) != DartEventListenerType) | |
| 126 continue; | |
| 127 DartEventListener* dartListener = static_cast<DartEventListener*>(listen
er); | |
| 128 if (dartListener->isolate() != Dart_CurrentIsolate()) | |
| 129 continue; | |
| 130 Dart_AppendValueToWeakReferenceSet(weakReferenceSet, dartListener->liste
nerObject()); | |
| 131 } | |
| 132 } | |
| 133 | |
| 134 void DartGCController::prologueCallback() | |
| 135 { | |
| 136 Dart_EnterScope(); | |
| 137 | |
| 138 DartDOMData* domData = DartDOMData::current(); | |
| 139 ASSERT(domData->isDOMEnabled()); | |
| 140 ASSERT(domData->reachableWeakHandle()); | |
| 141 | |
| 142 // Setup weak reference set builder. | |
| 143 Dart_WeakReferenceSetBuilder setBuilder = Dart_NewWeakReferenceSetBuilder(); | |
| 144 ASSERT(setBuilder); | |
| 145 domData->setWeakReferenceSetBuilder(setBuilder); | |
| 146 | |
| 147 // Setup root <=> weak_reference_set map. | |
| 148 WeakReferenceSetForRootMap weakReferenceSetForRootMap; | |
| 149 domData->setWeakReferenceSetForRootMap(&weakReferenceSetForRootMap); | |
| 150 | |
| 151 // Create dedicated weak reference set for a document. | |
| 152 // ActiveDOMObjects with pending activity and active Message ports | |
| 153 // will be added to this set. | |
| 154 ASSERT(domData->scriptExecutionContext()->isDocument()); | |
| 155 Document* document = static_cast<Document*>(domData->scriptExecutionContext(
)); | |
| 156 Dart_WeakReferenceSet documentWeakReferenceSet = | |
| 157 Dart_NewWeakReferenceSet(setBuilder, domData->reachableWeakHandle(), 0); | |
| 158 domData->setDocumentWeakReferenceSet(documentWeakReferenceSet); | |
| 159 weakReferenceSetForRootMap.set(document, documentWeakReferenceSet); | |
| 160 | |
| 161 // Now visit all the prolog weak handles. | |
| 162 Dart_Handle ALLOW_UNUSED result = Dart_VisitPrologueWeakHandles(prologueWeak
HandleCallback); | |
| 163 collectRetainedActiveDOMObjectWrappers(domData, documentWeakReferenceSet); | |
| 164 } | |
| 165 | |
| 166 void DartGCController::epilogueCallback() | |
| 167 { | |
| 168 Dart_ExitScope(); | |
| 169 } | |
| 170 | |
| 171 void DartGCController::prologueWeakHandleCallback(void* isolateCallbackData, Dar
t_WeakPersistentHandle obj, intptr_t numNativeFields, intptr_t* nativeFields) | |
| 172 { | |
| 173 if (!numNativeFields) | |
| 174 return; | |
| 175 ASSERT(numNativeFields == DartDOMWrapper::NativeFieldCount); | |
| 176 | |
| 177 DartDOMData* domData = reinterpret_cast<DartDOMData*>(isolateCallbackData); | |
| 178 ASSERT(domData->isDOMEnabled()); | |
| 179 | |
| 180 intptr_t cid = nativeFields[DartDOMWrapper::NativeTypeIndex]; | |
| 181 void* nativeObject = reinterpret_cast<void*>(nativeFields[DartDOMWrapper::Na
tiveImplementationIndex]); | |
| 182 const DartWrapperTypeInfo& typeInfo = DartWebkitClassInfo[cid]; | |
| 183 ASSERT(typeInfo.toNode); | |
| 184 Node* node = typeInfo.toNode(nativeObject); | |
| 185 if (node) { | |
| 186 Dart_WeakReferenceSetBuilder setBuilder = domData->weakReferenceSetBuild
er(); | |
| 187 WeakReferenceSetForRootMap* weakReferenceSetForRootMap = domData->weakRe
ferenceSetForRootMap(); | |
| 188 createWeakReferenceSetForNode(domData, setBuilder, node, obj, weakRefere
nceSetForRootMap); | |
| 189 return; | |
| 190 } | |
| 191 ASSERT(typeInfo.toEventTarget); | |
| 192 EventTarget* eventTarget = typeInfo.toEventTarget(nativeObject); | |
| 193 if (eventTarget) { | |
| 194 if (eventTarget->hasEventListeners()) { | |
| 195 Dart_WeakReferenceSetBuilder setBuilder = domData->weakReferenceSetB
uilder(); | |
| 196 Dart_WeakReferenceSet set = Dart_NewWeakReferenceSet(setBuilder, obj
, 0); | |
| 197 | |
| 198 collectEventListenerWrappers(eventTarget, set); | |
| 199 } | |
| 200 } | |
| 201 ASSERT(typeInfo.toActiveDOMObject); | |
| 202 ActiveDOMObject* activeDOMObject = typeInfo.toActiveDOMObject(nativeObject); | |
| 203 if (activeDOMObject && activeDOMObject->hasPendingActivity()) { | |
| 204 Dart_WeakReferenceSet documentWeakReferenceSet = domData->documentWeakRe
ferenceSet(); | |
| 205 Dart_AppendValueToWeakReferenceSet(documentWeakReferenceSet, obj); | |
| 206 } | |
| 207 } | |
| 208 | |
| 209 } | |
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