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https://github.com/Samsung/escargot.git
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ebcd331fd8
Also do some cleanup in ExecutionState. Signed-off-by: Zoltan Herczeg zherczeg.u-szeged@partner.samsung.com
117 lines
3.8 KiB
C++
117 lines
3.8 KiB
C++
/*
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* Copyright (c) 2016-present Samsung Electronics Co., Ltd
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301
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* USA
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*/
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#include "Escargot.h"
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#include "ExecutionState.h"
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#include "Context.h"
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#include "Environment.h"
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#include "EnvironmentRecord.h"
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#include "FunctionObject.h"
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namespace Escargot {
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void ExecutionState::throwException(const Value& e)
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{
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context()->throwException(*this, e);
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}
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ExecutionStateRareData* ExecutionState::ensureRareData()
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{
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if (m_parent & 1) {
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ExecutionState* p = parent();
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m_rareData = new ExecutionStateRareData();
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m_rareData->m_parent = p;
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}
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return rareData();
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}
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FunctionObject* ExecutionState::resolveCallee()
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{
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LexicalEnvironment* env = m_lexicalEnvironment;
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while (env != nullptr) {
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if (env->record()->isDeclarativeEnvironmentRecord() && env->record()->asDeclarativeEnvironmentRecord()->isFunctionEnvironmentRecord()) {
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return env->record()->asDeclarativeEnvironmentRecord()->asFunctionEnvironmentRecord()->functionObject();
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}
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env = env->outerEnvironment();
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}
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return nullptr;
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}
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Value ExecutionState::getNewTarget()
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{
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EnvironmentRecord* envRec = getThisEnvironment();
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ASSERT(envRec->isDeclarativeEnvironmentRecord() && envRec->asDeclarativeEnvironmentRecord()->isFunctionEnvironmentRecord());
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FunctionEnvironmentRecord* funcEnvRec = envRec->asDeclarativeEnvironmentRecord()->asFunctionEnvironmentRecord();
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return funcEnvRec->newTarget() ? funcEnvRec->newTarget() : Value();
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}
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EnvironmentRecord* ExecutionState::getThisEnvironment()
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{
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LexicalEnvironment* lex = m_lexicalEnvironment;
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LexicalEnvironment* prevLex = nullptr;
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while (true) {
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EnvironmentRecord* envRec = lex->record();
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if (envRec->hasThisBinding()) {
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return envRec;
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}
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lex = lex->outerEnvironment();
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}
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}
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Value ExecutionState::makeSuperPropertyReference(ExecutionState& state)
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{
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EnvironmentRecord* envRec = getThisEnvironment();
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if (!envRec->hasSuperBinding()) {
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ErrorObject::throwBuiltinError(state, ErrorObject::Code::ReferenceError, errorMessage_No_Super_Binding);
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}
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ASSERT(envRec->isDeclarativeEnvironmentRecord() && envRec->asDeclarativeEnvironmentRecord()->isFunctionEnvironmentRecord());
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FunctionEnvironmentRecord* funcEnvRec = envRec->asDeclarativeEnvironmentRecord()->asFunctionEnvironmentRecord();
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Value bv = funcEnvRec->getSuperBase(state).toObject(state);
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return bv;
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}
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Value ExecutionState::getSuperConstructor(ExecutionState& state)
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{
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EnvironmentRecord* envRec = getThisEnvironment();
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ASSERT(envRec->isDeclarativeEnvironmentRecord() && envRec->asDeclarativeEnvironmentRecord()->isFunctionEnvironmentRecord());
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FunctionEnvironmentRecord* funcEnvRec = envRec->asDeclarativeEnvironmentRecord()->asFunctionEnvironmentRecord();
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Value activeFunction = funcEnvRec->functionObject() ? funcEnvRec->functionObject() : Value();
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Value superConstructor = activeFunction.asObject()->getPrototype(state);
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if (superConstructor.isConstructor() == false) {
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ErrorObject::throwBuiltinError(state, ErrorObject::Code::TypeError, errorMessage_No_Super_Binding);
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}
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return superConstructor;
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}
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}
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