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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/ScriptState.h"
     31 #include "bindings/v8/V8HiddenValue.h"
     32 #include "bindings/v8/WrapperTypeInfo.h"
     33 #include "gin/public/gin_embedders.h"
     34 #include "gin/public/isolate_holder.h"
     35 #include <v8.h>
     36 #include "wtf/Forward.h"
     37 #include "wtf/HashMap.h"
     38 #include "wtf/OwnPtr.h"
     39 #include "wtf/Vector.h"
     40 
     41 namespace WebCore {
     42 
     43 class DOMDataStore;
     44 class GCEventData;
     45 class StringCache;
     46 struct WrapperTypeInfo;
     47 
     48 class ExternalStringVisitor;
     49 
     50 typedef WTF::Vector<DOMDataStore*> DOMDataStoreList;
     51 
     52 class V8PerIsolateData {
     53 public:
     54     static void ensureInitialized(v8::Isolate*);
     55     static V8PerIsolateData* from(v8::Isolate* isolate)
     56     {
     57         ASSERT(isolate);
     58         ASSERT(isolate->GetData(gin::kEmbedderBlink));
     59         return static_cast<V8PerIsolateData*>(isolate->GetData(gin::kEmbedderBlink));
     60     }
     61     static void dispose(v8::Isolate*);
     62     static v8::Isolate* mainThreadIsolate();
     63 
     64     v8::Isolate* isolate() { return m_isolate; }
     65 
     66     v8::Handle<v8::FunctionTemplate> toStringTemplate();
     67 
     68     StringCache* stringCache() { return m_stringCache.get(); }
     69 
     70     v8::Persistent<v8::Value>& ensureLiveRoot();
     71 
     72     int recursionLevel() const { return m_recursionLevel; }
     73     int incrementRecursionLevel() { return ++m_recursionLevel; }
     74     int decrementRecursionLevel() { return --m_recursionLevel; }
     75 
     76     bool performingMicrotaskCheckpoint() const { return m_performingMicrotaskCheckpoint; }
     77     void setPerformingMicrotaskCheckpoint(bool performingMicrotaskCheckpoint) { m_performingMicrotaskCheckpoint = performingMicrotaskCheckpoint; }
     78 
     79 #ifndef NDEBUG
     80     int internalScriptRecursionLevel() const { return m_internalScriptRecursionLevel; }
     81     int incrementInternalScriptRecursionLevel() { return ++m_internalScriptRecursionLevel; }
     82     int decrementInternalScriptRecursionLevel() { return --m_internalScriptRecursionLevel; }
     83 #endif
     84 
     85     GCEventData* gcEventData() { return m_gcEventData.get(); }
     86     V8HiddenValue* hiddenValue() { return m_hiddenValue.get(); }
     87 
     88     v8::Handle<v8::FunctionTemplate> domTemplate(void* domTemplateKey, v8::FunctionCallback = 0, v8::Handle<v8::Value> data = v8::Handle<v8::Value>(), v8::Handle<v8::Signature> = v8::Handle<v8::Signature>(), int length = 0);
     89     v8::Handle<v8::FunctionTemplate> existingDOMTemplate(void* domTemplateKey);
     90     void setDOMTemplate(void* domTemplateKey, v8::Handle<v8::FunctionTemplate>);
     91 
     92     bool hasInstance(const WrapperTypeInfo*, v8::Handle<v8::Value>);
     93     v8::Handle<v8::Object> findInstanceInPrototypeChain(const WrapperTypeInfo*, v8::Handle<v8::Value>);
     94 
     95     v8::Local<v8::Context> ensureScriptRegexpContext();
     96 
     97     const char* previousSamplingState() const { return m_previousSamplingState; }
     98     void setPreviousSamplingState(const char* name) { m_previousSamplingState = name; }
     99 
    100 private:
    101     explicit V8PerIsolateData(v8::Isolate*);
    102     ~V8PerIsolateData();
    103 
    104     typedef HashMap<const void*, v8::Eternal<v8::FunctionTemplate> > DOMTemplateMap;
    105     DOMTemplateMap& currentDOMTemplateMap();
    106     bool hasInstance(const WrapperTypeInfo*, v8::Handle<v8::Value>, DOMTemplateMap&);
    107     v8::Handle<v8::Object> findInstanceInPrototypeChain(const WrapperTypeInfo*, v8::Handle<v8::Value>, DOMTemplateMap&);
    108 
    109     v8::Isolate* m_isolate;
    110     OwnPtr<gin::IsolateHolder> m_isolateHolder;
    111     DOMTemplateMap m_domTemplateMapForMainWorld;
    112     DOMTemplateMap m_domTemplateMapForNonMainWorld;
    113     ScopedPersistent<v8::FunctionTemplate> m_toStringTemplate;
    114     OwnPtr<StringCache> m_stringCache;
    115     OwnPtr<V8HiddenValue> m_hiddenValue;
    116     ScopedPersistent<v8::Value> m_liveRoot;
    117     RefPtr<ScriptState> m_scriptRegexpScriptState;
    118 
    119     const char* m_previousSamplingState;
    120 
    121     bool m_constructorMode;
    122     friend class ConstructorMode;
    123 
    124     int m_recursionLevel;
    125 
    126 #ifndef NDEBUG
    127     int m_internalScriptRecursionLevel;
    128 #endif
    129     OwnPtr<GCEventData> m_gcEventData;
    130     bool m_performingMicrotaskCheckpoint;
    131 };
    132 
    133 } // namespace WebCore
    134 
    135 #endif // V8PerIsolateData_h
    136