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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/core/v8/ScopedPersistent.h"
     30 #include "bindings/core/v8/ScriptState.h"
     31 #include "bindings/core/v8/V8HiddenValue.h"
     32 #include "bindings/core/v8/WrapperTypeInfo.h"
     33 #include "gin/public/gin_embedders.h"
     34 #include "gin/public/isolate_holder.h"
     35 #include "modules/indexeddb/IDBPendingTransactionMonitor.h"
     36 #include "wtf/Forward.h"
     37 #include "wtf/HashMap.h"
     38 #include "wtf/OwnPtr.h"
     39 #include "wtf/Vector.h"
     40 #include <v8.h>
     41 
     42 namespace blink {
     43 
     44 class DOMDataStore;
     45 class GCEventData;
     46 class StringCache;
     47 struct WrapperTypeInfo;
     48 
     49 class ExternalStringVisitor;
     50 
     51 typedef WTF::Vector<DOMDataStore*> DOMDataStoreList;
     52 
     53 class V8PerIsolateData {
     54 public:
     55     static v8::Isolate* initialize();
     56     static V8PerIsolateData* from(v8::Isolate* isolate)
     57     {
     58         ASSERT(isolate);
     59         ASSERT(isolate->GetData(gin::kEmbedderBlink));
     60         return static_cast<V8PerIsolateData*>(isolate->GetData(gin::kEmbedderBlink));
     61     }
     62 
     63     static void willBeDestroyed(v8::Isolate*);
     64     static void destroy(v8::Isolate*);
     65     static v8::Isolate* mainThreadIsolate();
     66 
     67     bool destructionPending() const { return m_destructionPending; }
     68     v8::Isolate* isolate() { return m_isolateHolder->isolate(); }
     69 
     70     v8::Handle<v8::FunctionTemplate> toStringTemplate();
     71 
     72     StringCache* stringCache() { return m_stringCache.get(); }
     73 
     74     v8::Persistent<v8::Value>& ensureLiveRoot();
     75 
     76     int recursionLevel() const { return m_recursionLevel; }
     77     int incrementRecursionLevel() { return ++m_recursionLevel; }
     78     int decrementRecursionLevel() { return --m_recursionLevel; }
     79     bool isHandlingRecursionLevelError() const { return m_isHandlingRecursionLevelError; }
     80     void setIsHandlingRecursionLevelError(bool value) { m_isHandlingRecursionLevelError = value; }
     81 
     82     bool performingMicrotaskCheckpoint() const { return m_performingMicrotaskCheckpoint; }
     83     void setPerformingMicrotaskCheckpoint(bool performingMicrotaskCheckpoint) { m_performingMicrotaskCheckpoint = performingMicrotaskCheckpoint; }
     84 
     85 #if ENABLE(ASSERT)
     86     int internalScriptRecursionLevel() const { return m_internalScriptRecursionLevel; }
     87     int incrementInternalScriptRecursionLevel() { return ++m_internalScriptRecursionLevel; }
     88     int decrementInternalScriptRecursionLevel() { return --m_internalScriptRecursionLevel; }
     89 #endif
     90 
     91     GCEventData* gcEventData() { return m_gcEventData.get(); }
     92     V8HiddenValue* hiddenValue() { return m_hiddenValue.get(); }
     93 
     94     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);
     95     v8::Handle<v8::FunctionTemplate> existingDOMTemplate(void* domTemplateKey);
     96     void setDOMTemplate(void* domTemplateKey, v8::Handle<v8::FunctionTemplate>);
     97 
     98     bool hasInstance(const WrapperTypeInfo*, v8::Handle<v8::Value>);
     99     v8::Handle<v8::Object> findInstanceInPrototypeChain(const WrapperTypeInfo*, v8::Handle<v8::Value>);
    100 
    101     v8::Local<v8::Context> ensureScriptRegexpContext();
    102 
    103     const char* previousSamplingState() const { return m_previousSamplingState; }
    104     void setPreviousSamplingState(const char* name) { m_previousSamplingState = name; }
    105 
    106     IDBPendingTransactionMonitor* ensureIDBPendingTransactionMonitor();
    107 
    108 private:
    109     V8PerIsolateData();
    110     ~V8PerIsolateData();
    111 
    112     typedef HashMap<const void*, v8::Eternal<v8::FunctionTemplate> > DOMTemplateMap;
    113     DOMTemplateMap& currentDOMTemplateMap();
    114     bool hasInstance(const WrapperTypeInfo*, v8::Handle<v8::Value>, DOMTemplateMap&);
    115     v8::Handle<v8::Object> findInstanceInPrototypeChain(const WrapperTypeInfo*, v8::Handle<v8::Value>, DOMTemplateMap&);
    116 
    117     bool m_destructionPending;
    118     OwnPtr<gin::IsolateHolder> m_isolateHolder;
    119     DOMTemplateMap m_domTemplateMapForMainWorld;
    120     DOMTemplateMap m_domTemplateMapForNonMainWorld;
    121     ScopedPersistent<v8::FunctionTemplate> m_toStringTemplate;
    122     OwnPtr<StringCache> m_stringCache;
    123     OwnPtr<V8HiddenValue> m_hiddenValue;
    124     ScopedPersistent<v8::Value> m_liveRoot;
    125     RefPtr<ScriptState> m_scriptRegexpScriptState;
    126 
    127     const char* m_previousSamplingState;
    128 
    129     bool m_constructorMode;
    130     friend class ConstructorMode;
    131 
    132     int m_recursionLevel;
    133     bool m_isHandlingRecursionLevelError;
    134 
    135 #if ENABLE(ASSERT)
    136     int m_internalScriptRecursionLevel;
    137 #endif
    138     OwnPtr<GCEventData> m_gcEventData;
    139     bool m_performingMicrotaskCheckpoint;
    140 
    141     OwnPtr<IDBPendingTransactionMonitor> m_idbPendingTransactionMonitor;
    142 };
    143 
    144 } // namespace blink
    145 
    146 #endif // V8PerIsolateData_h
    147