| // Copyright 2014 PDFium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com |
| |
| #include "fxjs/cfxjs_engine.h" |
| |
| #include <memory> |
| #include <utility> |
| |
| #include "core/fxcrt/unowned_ptr.h" |
| #include "fxjs/cjs_object.h" |
| #include "fxjs/fxv8.h" |
| #include "fxjs/xfa/cfxjse_runtimedata.h" |
| #include "third_party/base/check.h" |
| #include "third_party/base/stl_util.h" |
| #include "v8/include/v8-util.h" |
| |
| class CFXJS_PerObjectData; |
| |
| namespace { |
| |
| unsigned int g_embedderDataSlot = 1u; |
| v8::Isolate* g_isolate = nullptr; |
| size_t g_isolate_ref_count = 0; |
| CFX_V8ArrayBufferAllocator* g_arrayBufferAllocator = nullptr; |
| v8::Global<v8::ObjectTemplate>* g_DefaultGlobalObjectTemplate = nullptr; |
| |
| // Only the address matters, values are for humans debugging. ASLR should |
| // ensure that these values are unlikely to arise otherwise. |
| const char kPerObjectDataTag[] = "CFXJS_PerObjectData"; |
| const char kPerIsolateDataTag[] = "FXJS_PerIsolateData"; |
| |
| void* GetAlignedPointerForPerObjectDataTag() { |
| return const_cast<void*>(static_cast<const void*>(kPerObjectDataTag)); |
| } |
| |
| std::pair<int, int> GetLineAndColumnFromError(v8::Local<v8::Message> message, |
| v8::Local<v8::Context> context) { |
| if (message.IsEmpty()) |
| return std::make_pair(-1, -1); |
| return std::make_pair(message->GetLineNumber(context).FromMaybe(-1), |
| message->GetStartColumn()); |
| } |
| |
| } // namespace |
| |
| // Global weak map to save dynamic objects. |
| class V8TemplateMapTraits final |
| : public v8::StdMapTraits<CFXJS_PerObjectData*, v8::Object> { |
| public: |
| using WeakCallbackDataType = CFXJS_PerObjectData; |
| using MapType = v8:: |
| GlobalValueMap<WeakCallbackDataType*, v8::Object, V8TemplateMapTraits>; |
| |
| static const v8::PersistentContainerCallbackType kCallbackType = |
| v8::kWeakWithInternalFields; |
| |
| static WeakCallbackDataType* WeakCallbackParameter( |
| MapType* map, |
| WeakCallbackDataType* key, |
| v8::Local<v8::Object> value) { |
| return key; |
| } |
| static MapType* MapFromWeakCallbackInfo( |
| const v8::WeakCallbackInfo<WeakCallbackDataType>&); |
| static WeakCallbackDataType* KeyFromWeakCallbackInfo( |
| const v8::WeakCallbackInfo<WeakCallbackDataType>& data) { |
| return data.GetParameter(); |
| } |
| static void OnWeakCallback( |
| const v8::WeakCallbackInfo<WeakCallbackDataType>& data) {} |
| static void DisposeWeak( |
| const v8::WeakCallbackInfo<WeakCallbackDataType>& data); |
| static void Dispose(v8::Isolate* isolate, |
| v8::Global<v8::Object> value, |
| WeakCallbackDataType* key); |
| static void DisposeCallbackData(WeakCallbackDataType* callbackData) {} |
| }; |
| |
| class V8TemplateMap { |
| public: |
| using WeakCallbackDataType = CFXJS_PerObjectData; |
| using MapType = v8:: |
| GlobalValueMap<WeakCallbackDataType*, v8::Object, V8TemplateMapTraits>; |
| |
| explicit V8TemplateMap(v8::Isolate* isolate) : m_map(isolate) {} |
| ~V8TemplateMap() = default; |
| |
| void SetAndMakeWeak(WeakCallbackDataType* key, v8::Local<v8::Object> handle) { |
| DCHECK(!m_map.Contains(key)); |
| |
| // Inserting an object into a GlobalValueMap with the appropriate traits |
| // has the side-effect of making the object weak deep in the guts of V8, |
| // and arranges for it to be cleaned up by the methods in the traits. |
| m_map.Set(key, handle); |
| } |
| |
| friend class V8TemplateMapTraits; |
| |
| private: |
| MapType m_map; |
| }; |
| |
| class CFXJS_PerObjectData { |
| public: |
| explicit CFXJS_PerObjectData(uint32_t nObjDefnID) : m_ObjDefnID(nObjDefnID) {} |
| |
| ~CFXJS_PerObjectData() = default; |
| |
| static void SetInObject(CFXJS_PerObjectData* pData, |
| v8::Local<v8::Object> pObj) { |
| if (pObj->InternalFieldCount() == 2) { |
| pObj->SetAlignedPointerInInternalField( |
| 0, GetAlignedPointerForPerObjectDataTag()); |
| pObj->SetAlignedPointerInInternalField(1, pData); |
| } |
| } |
| |
| static CFXJS_PerObjectData* GetFromObject(v8::Local<v8::Object> pObj) { |
| if (pObj.IsEmpty() || pObj->InternalFieldCount() != 2 || |
| pObj->GetAlignedPointerFromInternalField(0) != |
| GetAlignedPointerForPerObjectDataTag()) { |
| return nullptr; |
| } |
| return static_cast<CFXJS_PerObjectData*>( |
| pObj->GetAlignedPointerFromInternalField(1)); |
| } |
| |
| const uint32_t m_ObjDefnID; |
| std::unique_ptr<CJS_Object> m_pPrivate; |
| }; |
| |
| class CFXJS_ObjDefinition { |
| public: |
| CFXJS_ObjDefinition(v8::Isolate* isolate, |
| const char* sObjName, |
| FXJSOBJTYPE eObjType, |
| CFXJS_Engine::Constructor pConstructor, |
| CFXJS_Engine::Destructor pDestructor) |
| : m_ObjName(sObjName), |
| m_ObjType(eObjType), |
| m_pConstructor(pConstructor), |
| m_pDestructor(pDestructor), |
| m_pIsolate(isolate) { |
| v8::Isolate::Scope isolate_scope(isolate); |
| v8::HandleScope handle_scope(isolate); |
| v8::Local<v8::FunctionTemplate> fn = v8::FunctionTemplate::New(isolate); |
| fn->InstanceTemplate()->SetInternalFieldCount(2); |
| fn->InstanceTemplate()->SetImmutableProto(); |
| fn->SetCallHandler(CallHandler, v8::Number::New(isolate, eObjType)); |
| if (eObjType == FXJSOBJTYPE_GLOBAL) { |
| fn->InstanceTemplate()->Set(v8::Symbol::GetToStringTag(isolate), |
| fxv8::NewStringHelper(isolate, "global")); |
| } |
| m_FunctionTemplate.Reset(isolate, fn); |
| m_Signature.Reset(isolate, v8::Signature::New(isolate, fn)); |
| } |
| |
| static void CallHandler(const v8::FunctionCallbackInfo<v8::Value>& info) { |
| v8::Isolate* isolate = info.GetIsolate(); |
| if (!info.IsConstructCall()) { |
| fxv8::ThrowExceptionHelper(isolate, "illegal constructor"); |
| return; |
| } |
| if (info.Data().As<v8::Int32>()->Value() != FXJSOBJTYPE_DYNAMIC) { |
| fxv8::ThrowExceptionHelper(isolate, "not a dynamic object"); |
| return; |
| } |
| v8::Local<v8::Object> holder = info.Holder(); |
| DCHECK(holder->InternalFieldCount() == 2); |
| holder->SetAlignedPointerInInternalField(0, nullptr); |
| holder->SetAlignedPointerInInternalField(1, nullptr); |
| } |
| |
| v8::Isolate* GetIsolate() const { return m_pIsolate.Get(); } |
| |
| void DefineConst(const char* sConstName, v8::Local<v8::Value> pDefault) { |
| GetInstanceTemplate()->Set(GetIsolate(), sConstName, pDefault); |
| } |
| |
| void DefineProperty(v8::Local<v8::String> sPropName, |
| v8::AccessorGetterCallback pPropGet, |
| v8::AccessorSetterCallback pPropPut) { |
| GetInstanceTemplate()->SetAccessor(sPropName, pPropGet, pPropPut); |
| } |
| |
| void DefineMethod(v8::Local<v8::String> sMethodName, |
| v8::FunctionCallback pMethodCall) { |
| v8::Local<v8::FunctionTemplate> fun = v8::FunctionTemplate::New( |
| GetIsolate(), pMethodCall, v8::Local<v8::Value>(), GetSignature()); |
| fun->RemovePrototype(); |
| GetInstanceTemplate()->Set(sMethodName, fun, v8::ReadOnly); |
| } |
| |
| void DefineAllProperties(v8::GenericNamedPropertyQueryCallback pPropQurey, |
| v8::GenericNamedPropertyGetterCallback pPropGet, |
| v8::GenericNamedPropertySetterCallback pPropPut, |
| v8::GenericNamedPropertyDeleterCallback pPropDel) { |
| GetInstanceTemplate()->SetHandler(v8::NamedPropertyHandlerConfiguration( |
| pPropGet, pPropPut, pPropQurey, pPropDel, nullptr, |
| v8::Local<v8::Value>(), |
| v8::PropertyHandlerFlags::kOnlyInterceptStrings)); |
| } |
| |
| v8::Local<v8::ObjectTemplate> GetInstanceTemplate() { |
| v8::EscapableHandleScope scope(GetIsolate()); |
| v8::Local<v8::FunctionTemplate> function = |
| m_FunctionTemplate.Get(GetIsolate()); |
| return scope.Escape(function->InstanceTemplate()); |
| } |
| |
| v8::Local<v8::Signature> GetSignature() { |
| v8::EscapableHandleScope scope(GetIsolate()); |
| return scope.Escape(m_Signature.Get(GetIsolate())); |
| } |
| |
| const char* const m_ObjName; |
| const FXJSOBJTYPE m_ObjType; |
| const CFXJS_Engine::Constructor m_pConstructor; |
| const CFXJS_Engine::Destructor m_pDestructor; |
| UnownedPtr<v8::Isolate> m_pIsolate; |
| v8::Global<v8::FunctionTemplate> m_FunctionTemplate; |
| v8::Global<v8::Signature> m_Signature; |
| }; |
| |
| static v8::Local<v8::ObjectTemplate> GetGlobalObjectTemplate( |
| v8::Isolate* pIsolate) { |
| FXJS_PerIsolateData* pIsolateData = FXJS_PerIsolateData::Get(pIsolate); |
| for (uint32_t i = 1; i <= pIsolateData->CurrentMaxObjDefinitionID(); ++i) { |
| CFXJS_ObjDefinition* pObjDef = pIsolateData->ObjDefinitionForID(i); |
| if (pObjDef->m_ObjType == FXJSOBJTYPE_GLOBAL) |
| return pObjDef->GetInstanceTemplate(); |
| } |
| if (!g_DefaultGlobalObjectTemplate) { |
| v8::Local<v8::ObjectTemplate> hGlobalTemplate = |
| v8::ObjectTemplate::New(pIsolate); |
| hGlobalTemplate->Set(v8::Symbol::GetToStringTag(pIsolate), |
| fxv8::NewStringHelper(pIsolate, "global")); |
| g_DefaultGlobalObjectTemplate = |
| new v8::Global<v8::ObjectTemplate>(pIsolate, hGlobalTemplate); |
| } |
| return g_DefaultGlobalObjectTemplate->Get(pIsolate); |
| } |
| |
| void V8TemplateMapTraits::Dispose(v8::Isolate* isolate, |
| v8::Global<v8::Object> value, |
| WeakCallbackDataType* key) { |
| v8::Local<v8::Object> obj = value.Get(isolate); |
| if (obj.IsEmpty()) |
| return; |
| uint32_t id = CFXJS_Engine::GetObjDefnID(obj); |
| if (id == 0) |
| return; |
| FXJS_PerIsolateData* pIsolateData = FXJS_PerIsolateData::Get(isolate); |
| CFXJS_ObjDefinition* pObjDef = pIsolateData->ObjDefinitionForID(id); |
| if (!pObjDef) |
| return; |
| if (pObjDef->m_pDestructor) |
| pObjDef->m_pDestructor(obj); |
| CFXJS_Engine::FreeObjectPrivate(obj); |
| } |
| |
| void V8TemplateMapTraits::DisposeWeak( |
| const v8::WeakCallbackInfo<WeakCallbackDataType>& data) { |
| // TODO(tsepez): this is expected be called during GC. |
| } |
| |
| V8TemplateMapTraits::MapType* V8TemplateMapTraits::MapFromWeakCallbackInfo( |
| const v8::WeakCallbackInfo<WeakCallbackDataType>& data) { |
| V8TemplateMap* pMap = |
| FXJS_PerIsolateData::Get(data.GetIsolate())->m_pDynamicObjsMap.get(); |
| return pMap ? &pMap->m_map : nullptr; |
| } |
| |
| void FXJS_Initialize(unsigned int embedderDataSlot, v8::Isolate* pIsolate) { |
| if (g_isolate) { |
| DCHECK(g_embedderDataSlot == embedderDataSlot); |
| DCHECK(g_isolate == pIsolate); |
| return; |
| } |
| g_embedderDataSlot = embedderDataSlot; |
| g_isolate = pIsolate; |
| } |
| |
| void FXJS_Release() { |
| DCHECK(!g_isolate || g_isolate_ref_count == 0); |
| delete g_DefaultGlobalObjectTemplate; |
| g_DefaultGlobalObjectTemplate = nullptr; |
| g_isolate = nullptr; |
| |
| delete g_arrayBufferAllocator; |
| g_arrayBufferAllocator = nullptr; |
| } |
| |
| bool FXJS_GetIsolate(v8::Isolate** pResultIsolate) { |
| if (g_isolate) { |
| *pResultIsolate = g_isolate; |
| return false; |
| } |
| // Provide backwards compatibility when no external isolate. |
| if (!g_arrayBufferAllocator) |
| g_arrayBufferAllocator = new CFX_V8ArrayBufferAllocator(); |
| v8::Isolate::CreateParams params; |
| params.array_buffer_allocator = g_arrayBufferAllocator; |
| *pResultIsolate = v8::Isolate::New(params); |
| return true; |
| } |
| |
| size_t FXJS_GlobalIsolateRefCount() { |
| return g_isolate_ref_count; |
| } |
| |
| // static |
| void FXJS_PerIsolateData::SetUp(v8::Isolate* pIsolate) { |
| if (!pIsolate->GetData(g_embedderDataSlot)) |
| pIsolate->SetData(g_embedderDataSlot, new FXJS_PerIsolateData(pIsolate)); |
| } |
| |
| // static |
| FXJS_PerIsolateData* FXJS_PerIsolateData::Get(v8::Isolate* pIsolate) { |
| auto* result = |
| static_cast<FXJS_PerIsolateData*>(pIsolate->GetData(g_embedderDataSlot)); |
| CHECK(result->m_Tag == kPerIsolateDataTag); |
| return result; |
| } |
| |
| FXJS_PerIsolateData::FXJS_PerIsolateData(v8::Isolate* pIsolate) |
| : m_Tag(kPerIsolateDataTag), |
| m_pDynamicObjsMap(std::make_unique<V8TemplateMap>(pIsolate)) {} |
| |
| FXJS_PerIsolateData::~FXJS_PerIsolateData() = default; |
| |
| uint32_t FXJS_PerIsolateData::CurrentMaxObjDefinitionID() const { |
| return pdfium::CollectionSize<uint32_t>(m_ObjectDefnArray); |
| } |
| |
| CFXJS_ObjDefinition* FXJS_PerIsolateData::ObjDefinitionForID( |
| uint32_t id) const { |
| return id > 0 && id <= CurrentMaxObjDefinitionID() |
| ? m_ObjectDefnArray[id - 1].get() |
| : nullptr; |
| } |
| |
| uint32_t FXJS_PerIsolateData::AssignIDForObjDefinition( |
| std::unique_ptr<CFXJS_ObjDefinition> pDefn) { |
| m_ObjectDefnArray.push_back(std::move(pDefn)); |
| return CurrentMaxObjDefinitionID(); |
| } |
| |
| CFXJS_Engine::CFXJS_Engine() : CFX_V8(nullptr) {} |
| |
| CFXJS_Engine::CFXJS_Engine(v8::Isolate* pIsolate) : CFX_V8(pIsolate) {} |
| |
| CFXJS_Engine::~CFXJS_Engine() = default; |
| |
| // static |
| uint32_t CFXJS_Engine::GetObjDefnID(v8::Local<v8::Object> pObj) { |
| CFXJS_PerObjectData* pData = CFXJS_PerObjectData::GetFromObject(pObj); |
| return pData ? pData->m_ObjDefnID : 0; |
| } |
| |
| // static |
| void CFXJS_Engine::SetObjectPrivate(v8::Local<v8::Object> pObj, |
| std::unique_ptr<CJS_Object> p) { |
| CFXJS_PerObjectData* pPerObjectData = |
| CFXJS_PerObjectData::GetFromObject(pObj); |
| if (!pPerObjectData) |
| return; |
| pPerObjectData->m_pPrivate = std::move(p); |
| } |
| |
| // static |
| void CFXJS_Engine::FreeObjectPrivate(v8::Local<v8::Object> pObj) { |
| CFXJS_PerObjectData* pData = CFXJS_PerObjectData::GetFromObject(pObj); |
| pObj->SetAlignedPointerInInternalField(0, nullptr); |
| pObj->SetAlignedPointerInInternalField(1, nullptr); |
| delete pData; |
| } |
| |
| uint32_t CFXJS_Engine::DefineObj(const char* sObjName, |
| FXJSOBJTYPE eObjType, |
| CFXJS_Engine::Constructor pConstructor, |
| CFXJS_Engine::Destructor pDestructor) { |
| v8::Isolate::Scope isolate_scope(GetIsolate()); |
| v8::HandleScope handle_scope(GetIsolate()); |
| FXJS_PerIsolateData::SetUp(GetIsolate()); |
| FXJS_PerIsolateData* pIsolateData = FXJS_PerIsolateData::Get(GetIsolate()); |
| return pIsolateData->AssignIDForObjDefinition( |
| std::make_unique<CFXJS_ObjDefinition>(GetIsolate(), sObjName, eObjType, |
| pConstructor, pDestructor)); |
| } |
| |
| void CFXJS_Engine::DefineObjMethod(uint32_t nObjDefnID, |
| const char* sMethodName, |
| v8::FunctionCallback pMethodCall) { |
| v8::Isolate::Scope isolate_scope(GetIsolate()); |
| v8::HandleScope handle_scope(GetIsolate()); |
| FXJS_PerIsolateData* pIsolateData = FXJS_PerIsolateData::Get(GetIsolate()); |
| CFXJS_ObjDefinition* pObjDef = pIsolateData->ObjDefinitionForID(nObjDefnID); |
| pObjDef->DefineMethod(NewString(sMethodName), pMethodCall); |
| } |
| |
| void CFXJS_Engine::DefineObjProperty(uint32_t nObjDefnID, |
| const char* sPropName, |
| v8::AccessorGetterCallback pPropGet, |
| v8::AccessorSetterCallback pPropPut) { |
| v8::Isolate::Scope isolate_scope(GetIsolate()); |
| v8::HandleScope handle_scope(GetIsolate()); |
| FXJS_PerIsolateData* pIsolateData = FXJS_PerIsolateData::Get(GetIsolate()); |
| CFXJS_ObjDefinition* pObjDef = pIsolateData->ObjDefinitionForID(nObjDefnID); |
| pObjDef->DefineProperty(NewString(sPropName), pPropGet, pPropPut); |
| } |
| |
| void CFXJS_Engine::DefineObjAllProperties( |
| uint32_t nObjDefnID, |
| v8::GenericNamedPropertyQueryCallback pPropQurey, |
| v8::GenericNamedPropertyGetterCallback pPropGet, |
| v8::GenericNamedPropertySetterCallback pPropPut, |
| v8::GenericNamedPropertyDeleterCallback pPropDel) { |
| v8::Isolate::Scope isolate_scope(GetIsolate()); |
| v8::HandleScope handle_scope(GetIsolate()); |
| FXJS_PerIsolateData* pIsolateData = FXJS_PerIsolateData::Get(GetIsolate()); |
| CFXJS_ObjDefinition* pObjDef = pIsolateData->ObjDefinitionForID(nObjDefnID); |
| pObjDef->DefineAllProperties(pPropQurey, pPropGet, pPropPut, pPropDel); |
| } |
| |
| void CFXJS_Engine::DefineObjConst(uint32_t nObjDefnID, |
| const char* sConstName, |
| v8::Local<v8::Value> pDefault) { |
| v8::Isolate::Scope isolate_scope(GetIsolate()); |
| v8::HandleScope handle_scope(GetIsolate()); |
| FXJS_PerIsolateData* pIsolateData = FXJS_PerIsolateData::Get(GetIsolate()); |
| CFXJS_ObjDefinition* pObjDef = pIsolateData->ObjDefinitionForID(nObjDefnID); |
| pObjDef->DefineConst(sConstName, pDefault); |
| } |
| |
| void CFXJS_Engine::DefineGlobalMethod(const char* sMethodName, |
| v8::FunctionCallback pMethodCall) { |
| v8::Isolate::Scope isolate_scope(GetIsolate()); |
| v8::HandleScope handle_scope(GetIsolate()); |
| v8::Local<v8::FunctionTemplate> fun = |
| v8::FunctionTemplate::New(GetIsolate(), pMethodCall); |
| fun->RemovePrototype(); |
| GetGlobalObjectTemplate(GetIsolate()) |
| ->Set(NewString(sMethodName), fun, v8::ReadOnly); |
| } |
| |
| void CFXJS_Engine::DefineGlobalConst(const wchar_t* sConstName, |
| v8::FunctionCallback pConstGetter) { |
| v8::Isolate::Scope isolate_scope(GetIsolate()); |
| v8::HandleScope handle_scope(GetIsolate()); |
| v8::Local<v8::FunctionTemplate> fun = |
| v8::FunctionTemplate::New(GetIsolate(), pConstGetter); |
| fun->RemovePrototype(); |
| GetGlobalObjectTemplate(GetIsolate()) |
| ->SetAccessorProperty(NewString(sConstName), fun); |
| } |
| |
| void CFXJS_Engine::InitializeEngine() { |
| if (GetIsolate() == g_isolate) |
| ++g_isolate_ref_count; |
| |
| v8::Isolate::Scope isolate_scope(GetIsolate()); |
| v8::HandleScope handle_scope(GetIsolate()); |
| |
| // This has to happen before we call GetGlobalObjectTemplate because that |
| // method gets the PerIsolateData from GetIsolate(). |
| FXJS_PerIsolateData::SetUp(GetIsolate()); |
| |
| v8::Local<v8::Context> v8Context = v8::Context::New( |
| GetIsolate(), nullptr, GetGlobalObjectTemplate(GetIsolate())); |
| |
| // May not have the internal fields when called from tests. |
| v8::Local<v8::Object> pThisProxy = v8Context->Global(); |
| if (pThisProxy->InternalFieldCount() == 2) { |
| pThisProxy->SetAlignedPointerInInternalField(0, nullptr); |
| pThisProxy->SetAlignedPointerInInternalField(1, nullptr); |
| } |
| v8::Local<v8::Object> pThis = pThisProxy->GetPrototype().As<v8::Object>(); |
| if (pThis->InternalFieldCount() == 2) { |
| pThis->SetAlignedPointerInInternalField(0, nullptr); |
| pThis->SetAlignedPointerInInternalField(1, nullptr); |
| } |
| |
| v8::Context::Scope context_scope(v8Context); |
| FXJS_PerIsolateData* pIsolateData = FXJS_PerIsolateData::Get(GetIsolate()); |
| uint32_t maxID = pIsolateData->CurrentMaxObjDefinitionID(); |
| m_StaticObjects.resize(maxID + 1); |
| for (uint32_t i = 1; i <= maxID; ++i) { |
| CFXJS_ObjDefinition* pObjDef = pIsolateData->ObjDefinitionForID(i); |
| if (pObjDef->m_ObjType == FXJSOBJTYPE_GLOBAL) { |
| CFXJS_PerObjectData::SetInObject(new CFXJS_PerObjectData(i), |
| v8Context->Global() |
| ->GetPrototype() |
| ->ToObject(v8Context) |
| .ToLocalChecked()); |
| if (pObjDef->m_pConstructor) { |
| pObjDef->m_pConstructor(this, v8Context->Global() |
| ->GetPrototype() |
| ->ToObject(v8Context) |
| .ToLocalChecked()); |
| } |
| } else if (pObjDef->m_ObjType == FXJSOBJTYPE_STATIC) { |
| v8::Local<v8::String> pObjName = NewString(pObjDef->m_ObjName); |
| v8::Local<v8::Object> obj = NewFXJSBoundObject(i, FXJSOBJTYPE_STATIC); |
| if (!obj.IsEmpty()) { |
| v8Context->Global()->Set(v8Context, pObjName, obj).FromJust(); |
| m_StaticObjects[i] = v8::Global<v8::Object>(GetIsolate(), obj); |
| } |
| } |
| } |
| m_V8Context.Reset(GetIsolate(), v8Context); |
| } |
| |
| void CFXJS_Engine::ReleaseEngine() { |
| v8::Isolate::Scope isolate_scope(GetIsolate()); |
| v8::HandleScope handle_scope(GetIsolate()); |
| v8::Local<v8::Context> context = GetV8Context(); |
| v8::Context::Scope context_scope(context); |
| FXJS_PerIsolateData* pIsolateData = FXJS_PerIsolateData::Get(GetIsolate()); |
| if (!pIsolateData) |
| return; |
| |
| m_ConstArrays.clear(); |
| |
| for (uint32_t i = 1; i <= pIsolateData->CurrentMaxObjDefinitionID(); ++i) { |
| CFXJS_ObjDefinition* pObjDef = pIsolateData->ObjDefinitionForID(i); |
| v8::Local<v8::Object> pObj; |
| if (pObjDef->m_ObjType == FXJSOBJTYPE_GLOBAL) { |
| pObj = |
| context->Global()->GetPrototype()->ToObject(context).ToLocalChecked(); |
| } else if (!m_StaticObjects[i].IsEmpty()) { |
| pObj = v8::Local<v8::Object>::New(GetIsolate(), m_StaticObjects[i]); |
| m_StaticObjects[i].Reset(); |
| } |
| if (!pObj.IsEmpty()) { |
| if (pObjDef->m_pDestructor) |
| pObjDef->m_pDestructor(pObj); |
| FreeObjectPrivate(pObj); |
| } |
| } |
| |
| m_V8Context.Reset(); |
| |
| if (GetIsolate() == g_isolate && --g_isolate_ref_count > 0) |
| return; |
| |
| delete pIsolateData; |
| GetIsolate()->SetData(g_embedderDataSlot, nullptr); |
| } |
| |
| Optional<IJS_Runtime::JS_Error> CFXJS_Engine::Execute( |
| const WideString& script) { |
| v8::Isolate::Scope isolate_scope(GetIsolate()); |
| v8::TryCatch try_catch(GetIsolate()); |
| v8::Local<v8::Context> context = GetIsolate()->GetCurrentContext(); |
| v8::Local<v8::Script> compiled_script; |
| if (!v8::Script::Compile(context, NewString(script.AsStringView())) |
| .ToLocal(&compiled_script)) { |
| v8::String::Utf8Value error(GetIsolate(), try_catch.Exception()); |
| v8::Local<v8::Message> msg = try_catch.Message(); |
| int line = -1; |
| int column = -1; |
| std::tie(line, column) = GetLineAndColumnFromError(msg, context); |
| return IJS_Runtime::JS_Error(line, column, WideString::FromUTF8(*error)); |
| } |
| |
| v8::Local<v8::Value> result; |
| if (!compiled_script->Run(context).ToLocal(&result)) { |
| v8::String::Utf8Value error(GetIsolate(), try_catch.Exception()); |
| auto msg = try_catch.Message(); |
| int line = -1; |
| int column = -1; |
| std::tie(line, column) = GetLineAndColumnFromError(msg, context); |
| return IJS_Runtime::JS_Error(line, column, WideString::FromUTF8(*error)); |
| } |
| return pdfium::nullopt; |
| } |
| |
| v8::Local<v8::Object> CFXJS_Engine::NewFXJSBoundObject(uint32_t nObjDefnID, |
| FXJSOBJTYPE type) { |
| v8::Isolate::Scope isolate_scope(GetIsolate()); |
| v8::Local<v8::Context> context = GetIsolate()->GetCurrentContext(); |
| FXJS_PerIsolateData* pData = FXJS_PerIsolateData::Get(GetIsolate()); |
| if (!pData) |
| return v8::Local<v8::Object>(); |
| |
| CFXJS_ObjDefinition* pObjDef = pData->ObjDefinitionForID(nObjDefnID); |
| if (!pObjDef) |
| return v8::Local<v8::Object>(); |
| |
| v8::Local<v8::Object> obj; |
| if (!pObjDef->GetInstanceTemplate()->NewInstance(context).ToLocal(&obj)) |
| return v8::Local<v8::Object>(); |
| |
| CFXJS_PerObjectData* pObjData = new CFXJS_PerObjectData(nObjDefnID); |
| CFXJS_PerObjectData::SetInObject(pObjData, obj); |
| if (pObjDef->m_pConstructor) |
| pObjDef->m_pConstructor(this, obj); |
| |
| if (type == FXJSOBJTYPE_DYNAMIC) { |
| auto* pIsolateData = FXJS_PerIsolateData::Get(GetIsolate()); |
| if (pIsolateData->m_pDynamicObjsMap) |
| pIsolateData->m_pDynamicObjsMap->SetAndMakeWeak(pObjData, obj); |
| } |
| return obj; |
| } |
| |
| v8::Local<v8::Object> CFXJS_Engine::GetThisObj() { |
| v8::Isolate::Scope isolate_scope(GetIsolate()); |
| if (!FXJS_PerIsolateData::Get(GetIsolate())) |
| return v8::Local<v8::Object>(); |
| |
| // Return the global object. |
| v8::Local<v8::Context> context = GetIsolate()->GetCurrentContext(); |
| return context->Global()->GetPrototype()->ToObject(context).ToLocalChecked(); |
| } |
| |
| void CFXJS_Engine::Error(const WideString& message) { |
| fxv8::ThrowExceptionHelper(GetIsolate(), message.AsStringView()); |
| } |
| |
| v8::Local<v8::Context> CFXJS_Engine::GetV8Context() { |
| return v8::Local<v8::Context>::New(GetIsolate(), m_V8Context); |
| } |
| |
| // static |
| CJS_Object* CFXJS_Engine::GetObjectPrivate(v8::Local<v8::Object> pObj) { |
| auto* pData = CFXJS_PerObjectData::GetFromObject(pObj); |
| if (pData) |
| return pData->m_pPrivate.get(); |
| |
| if (pObj.IsEmpty()) |
| return nullptr; |
| |
| // It could be a global proxy object, in which case the prototype holds |
| // the actual bound object. |
| v8::Local<v8::Value> val = pObj->GetPrototype(); |
| if (!val->IsObject()) |
| return nullptr; |
| |
| auto* pProtoData = CFXJS_PerObjectData::GetFromObject(val.As<v8::Object>()); |
| if (!pProtoData) |
| return nullptr; |
| |
| auto* pIsolateData = FXJS_PerIsolateData::Get(v8::Isolate::GetCurrent()); |
| if (!pIsolateData) |
| return nullptr; |
| |
| CFXJS_ObjDefinition* pObjDef = |
| pIsolateData->ObjDefinitionForID(pProtoData->m_ObjDefnID); |
| if (!pObjDef || pObjDef->m_ObjType != FXJSOBJTYPE_GLOBAL) |
| return nullptr; |
| |
| return pProtoData->m_pPrivate.get(); |
| } |
| |
| v8::Local<v8::Array> CFXJS_Engine::GetConstArray(const WideString& name) { |
| return v8::Local<v8::Array>::New(GetIsolate(), m_ConstArrays[name]); |
| } |
| |
| void CFXJS_Engine::SetConstArray(const WideString& name, |
| v8::Local<v8::Array> array) { |
| m_ConstArrays[name] = v8::Global<v8::Array>(GetIsolate(), array); |
| } |