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// Copyright 2014 The PDFium Authors
// 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/stl_util.h"
#include "core/fxcrt/unowned_ptr.h"
#include "fxjs/cfx_v8_array_buffer_allocator.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/check_op.h"
#include "v8/include/v8-context.h"
#include "v8/include/v8-exception.h"
#include "v8/include/v8-isolate.h"
#include "v8/include/v8-message.h"
#include "v8/include/v8-primitive.h"
#include "v8/include/v8-script.h"
#include "v8/include/v8-util.h"
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. Keep these
// wchar_t to prevent the compiler from doing something clever, like
// aligning them on a byte boundary to save space, which would make them
// incompatible for use as V8 aligned pointers.
const wchar_t kPerObjectDataTag[] = L"CFXJS_PerObjectData";
const wchar_t kPerIsolateDataTag[] = L"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
class CFXJS_PerObjectData {
public:
~CFXJS_PerObjectData() = default;
static void SetNewDataInObject(uint32_t nObjDefnID,
v8::Local<v8::Object> pObj) {
if (pObj->InternalFieldCount() == 2) {
pObj->SetAlignedPointerInInternalField(
0, GetAlignedPointerForPerObjectDataTag());
pObj->SetAlignedPointerInInternalField(
1, new CFXJS_PerObjectData(nObjDefnID));
}
}
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));
}
uint32_t GetObjDefnID() const { return m_ObjDefnID; }
CJS_Object* GetPrivate() { return m_pPrivate.get(); }
void SetPrivate(std::unique_ptr<CJS_Object> p) { m_pPrivate = std::move(p); }
private:
explicit CFXJS_PerObjectData(uint32_t nObjDefnID) : m_ObjDefnID(nObjDefnID) {}
const uint32_t m_ObjDefnID;
std::unique_ptr<CJS_Object> m_pPrivate;
};
// 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(v8::Local<v8::Object> handle) {
WeakCallbackDataType* key = CFXJS_PerObjectData::GetFromObject(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);
}
MapType* GetMap() { return &m_map; }
private:
MapType m_map;
};
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_EQ(holder->InternalFieldCount(), 2);
holder->SetAlignedPointerInInternalField(0, nullptr);
holder->SetAlignedPointerInInternalField(1, nullptr);
}
FXJSOBJTYPE GetObjType() const { return m_ObjType; }
const char* GetObjName() const { return m_ObjName; }
v8::Isolate* GetIsolate() const { return m_pIsolate; }
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,
v8::GenericNamedPropertyEnumeratorCallback pPropEnum) {
GetInstanceTemplate()->SetHandler(v8::NamedPropertyHandlerConfiguration(
pPropGet, pPropPut, pPropQurey, pPropDel, pPropEnum,
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()));
}
void RunConstructor(CFXJS_Engine* pEngine,
v8::Local<v8::Object> obj,
v8::Local<v8::Object> proxy) {
if (m_pConstructor)
m_pConstructor(pEngine, obj, proxy);
}
void RunDestructor(v8::Local<v8::Object> obj) {
if (m_pDestructor)
m_pDestructor(obj);
}
private:
UnownedPtr<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->GetObjType() == 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;
pObjDef->RunDestructor(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>& info) {
auto* pIsolateData = FXJS_PerIsolateData::Get(info.GetIsolate());
V8TemplateMap* pObjsMap = pIsolateData->GetDynamicObjsMap();
return pObjsMap ? pObjsMap->GetMap() : nullptr;
}
void FXJS_Initialize(unsigned int embedderDataSlot, v8::Isolate* pIsolate) {
if (g_isolate) {
DCHECK_EQ(g_embedderDataSlot, embedderDataSlot);
DCHECK_EQ(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 fxcrt::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->GetObjDefnID() : 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)
pPerObjectData->SetPrivate(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::GenericNamedPropertyEnumeratorCallback pPropEnum) {
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,
pPropEnum);
}
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->GetObjType() == FXJSOBJTYPE_GLOBAL) {
CFXJS_PerObjectData::SetNewDataInObject(i, pThis);
pObjDef->RunConstructor(this, pThis, pThisProxy);
} else if (pObjDef->GetObjType() == FXJSOBJTYPE_STATIC) {
v8::Local<v8::String> pObjName = NewString(pObjDef->GetObjName());
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->GetObjType() == 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()) {
pObjDef->RunDestructor(pObj);
FreeObjectPrivate(pObj);
}
}
m_V8Context.Reset();
if (GetIsolate() == g_isolate && --g_isolate_ref_count > 0)
return;
delete pIsolateData;
GetIsolate()->SetData(g_embedderDataSlot, nullptr);
}
absl::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 absl::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::SetNewDataInObject(nObjDefnID, obj);
pObjDef->RunConstructor(this, obj, obj);
if (type == FXJSOBJTYPE_DYNAMIC) {
auto* pIsolateData = FXJS_PerIsolateData::Get(GetIsolate());
V8TemplateMap* pObjsMap = pIsolateData->GetDynamicObjsMap();
if (pObjsMap)
pObjsMap->SetAndMakeWeak(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::Isolate* pIsolate,
v8::Local<v8::Object> pObj) {
auto* pData = CFXJS_PerObjectData::GetFromObject(pObj);
if (pData)
return pData->GetPrivate();
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(pIsolate);
if (!pIsolateData)
return nullptr;
CFXJS_ObjDefinition* pObjDef =
pIsolateData->ObjDefinitionForID(pProtoData->GetObjDefnID());
if (!pObjDef || pObjDef->GetObjType() != FXJSOBJTYPE_GLOBAL)
return nullptr;
return pProtoData->GetPrivate();
}
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);
}