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      1 /*
      2  * Copyright (C) 2009 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
      6  * are met:
      7  * 1. Redistributions of source code must retain the above copyright
      8  *    notice, this list of conditions and the following disclaimer.
      9  * 2. Redistributions in binary form must reproduce the above copyright
     10  *    notice, this list of conditions and the following disclaimer in the
     11  *    documentation and/or other materials provided with the distribution.
     12  *
     13  * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
     14  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
     15  * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     16  * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
     17  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     18  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     19  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     20  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     21  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     22  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
     23  * THE POSSIBILITY OF SUCH DAMAGE.
     24  */
     25 
     26 #ifndef V8PerIsolateData_h
     27 #define V8PerIsolateData_h
     28 
     29 #include "bindings/v8/ScopedPersistent.h"
     30 #include "bindings/v8/UnsafePersistent.h"
     31 #include "bindings/v8/WrapperTypeInfo.h"
     32 #include "gin/public/gin_embedders.h"
     33 #include <v8.h>
     34 #include "wtf/Forward.h"
     35 #include "wtf/HashMap.h"
     36 #include "wtf/OwnPtr.h"
     37 #include "wtf/Vector.h"
     38 
     39 namespace WebCore {
     40 
     41 class DOMDataStore;
     42 class GCEventData;
     43 class StringCache;
     44 class V8HiddenPropertyName;
     45 struct WrapperTypeInfo;
     46 
     47 class ExternalStringVisitor;
     48 
     49 typedef WTF::Vector<DOMDataStore*> DOMDataList;
     50 
     51 class V8PerIsolateData {
     52 public:
     53     static V8PerIsolateData* create(v8::Isolate*);
     54     static void ensureInitialized(v8::Isolate*);
     55     static V8PerIsolateData* current()
     56     {
     57         return from(v8::Isolate::GetCurrent());
     58     }
     59     static V8PerIsolateData* from(v8::Isolate* isolate)
     60     {
     61         ASSERT(isolate);
     62         ASSERT(isolate->GetData(gin::kEmbedderBlink));
     63         return static_cast<V8PerIsolateData*>(isolate->GetData(gin::kEmbedderBlink));
     64     }
     65     static void dispose(v8::Isolate*);
     66 
     67     typedef HashMap<const void*, UnsafePersistent<v8::FunctionTemplate> > TemplateMap;
     68 
     69     TemplateMap& rawDOMTemplateMap(WrapperWorldType worldType)
     70     {
     71         if (worldType == MainWorld)
     72             return m_rawDOMTemplatesForMainWorld;
     73         return m_rawDOMTemplatesForNonMainWorld;
     74     }
     75 
     76     TemplateMap& templateMap(WrapperWorldType worldType)
     77     {
     78         if (worldType == MainWorld)
     79             return m_templatesForMainWorld;
     80         return m_templatesForNonMainWorld;
     81     }
     82 
     83     v8::Handle<v8::FunctionTemplate> toStringTemplate();
     84     v8::Handle<v8::FunctionTemplate> lazyEventListenerToStringTemplate()
     85     {
     86         return v8::Local<v8::FunctionTemplate>::New(m_isolate, m_lazyEventListenerToStringTemplate);
     87     }
     88 
     89     StringCache* stringCache() { return m_stringCache.get(); }
     90 
     91     v8::Persistent<v8::Value>& ensureLiveRoot();
     92 
     93     DOMDataList& allStores() { return m_domDataList; }
     94 
     95     V8HiddenPropertyName* hiddenPropertyName() { return m_hiddenPropertyName.get(); }
     96 
     97     void registerDOMDataStore(DOMDataStore* domDataStore)
     98     {
     99         ASSERT(m_domDataList.find(domDataStore) == kNotFound);
    100         m_domDataList.append(domDataStore);
    101     }
    102 
    103     void unregisterDOMDataStore(DOMDataStore* domDataStore)
    104     {
    105         ASSERT(m_domDataList.find(domDataStore) != kNotFound);
    106         m_domDataList.remove(m_domDataList.find(domDataStore));
    107     }
    108 
    109     // DOMDataStore is owned outside V8PerIsolateData.
    110     DOMDataStore* workerDOMDataStore() { return m_workerDomDataStore; }
    111     void setWorkerDOMDataStore(DOMDataStore* store) { m_workerDomDataStore = store; }
    112 
    113     int recursionLevel() const { return m_recursionLevel; }
    114     int incrementRecursionLevel() { return ++m_recursionLevel; }
    115     int decrementRecursionLevel() { return --m_recursionLevel; }
    116 
    117 #ifndef NDEBUG
    118     int internalScriptRecursionLevel() const { return m_internalScriptRecursionLevel; }
    119     int incrementInternalScriptRecursionLevel() { return ++m_internalScriptRecursionLevel; }
    120     int decrementInternalScriptRecursionLevel() { return --m_internalScriptRecursionLevel; }
    121 #endif
    122 
    123     GCEventData* gcEventData() { return m_gcEventData.get(); }
    124 
    125     // Gives the system a hint that we should request garbage collection
    126     // upon the next close or navigation event, because some expensive
    127     // objects have been allocated that we want to take every opportunity
    128     // to collect.
    129     void setShouldCollectGarbageSoon() { m_shouldCollectGarbageSoon = true; }
    130     void clearShouldCollectGarbageSoon() { m_shouldCollectGarbageSoon = false; }
    131     bool shouldCollectGarbageSoon() const { return m_shouldCollectGarbageSoon; }
    132 
    133     v8::Handle<v8::FunctionTemplate> privateTemplate(WrapperWorldType, void* privatePointer, v8::FunctionCallback = 0, v8::Handle<v8::Value> data = v8::Handle<v8::Value>(), v8::Handle<v8::Signature> = v8::Handle<v8::Signature>(), int length = 0);
    134     v8::Handle<v8::FunctionTemplate> privateTemplateIfExists(WrapperWorldType, void* privatePointer);
    135     void setPrivateTemplate(WrapperWorldType, void* privatePointer, v8::Handle<v8::FunctionTemplate>);
    136 
    137     v8::Handle<v8::FunctionTemplate> rawDOMTemplate(const WrapperTypeInfo*, WrapperWorldType);
    138 
    139     bool hasInstance(const WrapperTypeInfo*, v8::Handle<v8::Value>, WrapperWorldType);
    140 
    141     v8::Local<v8::Context> ensureRegexContext();
    142 
    143     const char* previousSamplingState() const { return m_previousSamplingState; }
    144     void setPreviousSamplingState(const char* name) { m_previousSamplingState = name; }
    145 
    146 private:
    147     explicit V8PerIsolateData(v8::Isolate*);
    148     ~V8PerIsolateData();
    149     static void constructorOfToString(const v8::FunctionCallbackInfo<v8::Value>&);
    150 
    151     v8::Isolate* m_isolate;
    152     TemplateMap m_rawDOMTemplatesForMainWorld;
    153     TemplateMap m_rawDOMTemplatesForNonMainWorld;
    154     TemplateMap m_templatesForMainWorld;
    155     TemplateMap m_templatesForNonMainWorld;
    156     ScopedPersistent<v8::FunctionTemplate> m_toStringTemplate;
    157     v8::Persistent<v8::FunctionTemplate> m_lazyEventListenerToStringTemplate;
    158     OwnPtr<StringCache> m_stringCache;
    159 
    160     Vector<DOMDataStore*> m_domDataList;
    161     DOMDataStore* m_workerDomDataStore;
    162 
    163     OwnPtr<V8HiddenPropertyName> m_hiddenPropertyName;
    164     ScopedPersistent<v8::Value> m_liveRoot;
    165     ScopedPersistent<v8::Context> m_regexContext;
    166 
    167     const char* m_previousSamplingState;
    168 
    169     bool m_constructorMode;
    170     friend class ConstructorMode;
    171 
    172     int m_recursionLevel;
    173 
    174 #ifndef NDEBUG
    175     int m_internalScriptRecursionLevel;
    176 #endif
    177     OwnPtr<GCEventData> m_gcEventData;
    178     bool m_shouldCollectGarbageSoon;
    179 };
    180 
    181 } // namespace WebCore
    182 
    183 #endif // V8PerIsolateData_h
    184