mirror of
https://github.com/Samsung/escargot.git
synced 2026-06-22 10:01:50 +00:00
864973236d
* Remove some unused function, variables * Remove LexicalEnvironment from NativeFunctionObject * Don't save stack-allocated LexicalEnvironment on ScriptFunctionObject. it may cause memory leak from stack * Don't store newTarget, ThisBinded value on FunctionEnvironmentRecord if possible(we don't need these values except class functions) Signed-off-by: seonghyun kim <sh8281.kim@samsung.com>
235 lines
11 KiB
C++
235 lines
11 KiB
C++
/*
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* Copyright (c) 2019-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 "ScriptFunctionObject.h"
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#include "runtime/ArrayObject.h"
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#include "runtime/GeneratorObject.h"
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#include "runtime/Context.h"
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#include "runtime/ProxyObject.h"
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#include "interpreter/ByteCode.h"
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#include "interpreter/ByteCodeGenerator.h"
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#include "interpreter/ByteCodeInterpreter.h"
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#include "runtime/Environment.h"
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#include "runtime/EnvironmentRecord.h"
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#include "runtime/ErrorObject.h"
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#include "runtime/VMInstance.h"
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#include "parser/ScriptParser.h"
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#include "parser/ast/AST.h"
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#include "util/Util.h"
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#include "FunctionObjectInlines.h"
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namespace Escargot {
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ScriptFunctionObject::ScriptFunctionObject(ExecutionState& state, CodeBlock* codeBlock, LexicalEnvironment* outerEnv, bool isConstructor, bool isGenerator)
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: FunctionObject(state,
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((isConstructor || isGenerator) ? (ESCARGOT_OBJECT_BUILTIN_PROPERTY_NUMBER + 3) : (ESCARGOT_OBJECT_BUILTIN_PROPERTY_NUMBER + 2)) + (codeBlock->isStrict() ? 2 : 0))
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{
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m_codeBlock = codeBlock;
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m_outerEnvironment = outerEnv;
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if (m_outerEnvironment) {
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ASSERT(m_outerEnvironment->isAllocatedOnHeap());
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if (m_outerEnvironment->record()->isDeclarativeEnvironmentRecord() && m_outerEnvironment->record()->asDeclarativeEnvironmentRecord()->isFunctionEnvironmentRecord()) {
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ASSERT(!m_outerEnvironment->record()->asDeclarativeEnvironmentRecord()->asFunctionEnvironmentRecord()->isFunctionEnvironmentRecordOnStack());
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}
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}
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initStructureAndValues(state, isConstructor, isGenerator);
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if (isGenerator) {
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Object::setPrototype(state, state.context()->globalObject()->generator());
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} else {
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Object::setPrototype(state, state.context()->globalObject()->functionPrototype());
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}
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}
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NEVER_INLINE void ScriptFunctionObject::generateByteCodeBlock(ExecutionState& state)
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{
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Vector<CodeBlock*, GCUtil::gc_malloc_ignore_off_page_allocator<CodeBlock*>>& v = state.context()->compiledCodeBlocks();
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auto& currentCodeSizeTotal = state.context()->vmInstance()->compiledByteCodeSize();
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if (currentCodeSizeTotal > FUNCTION_OBJECT_BYTECODE_SIZE_MAX) {
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currentCodeSizeTotal = 0;
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std::vector<CodeBlock*, gc_allocator<CodeBlock*>> codeBlocksInCurrentStack;
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ExecutionState* es = &state;
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while (es != nullptr) {
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auto env = es->lexicalEnvironment();
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if (env != nullptr && env->record()->isDeclarativeEnvironmentRecord() && env->record()->asDeclarativeEnvironmentRecord()->isFunctionEnvironmentRecord()) {
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if (env->record()->asDeclarativeEnvironmentRecord()->asFunctionEnvironmentRecord()->functionObject()->codeBlock()->isInterpretedCodeBlock()) {
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InterpretedCodeBlock* cblk = env->record()->asDeclarativeEnvironmentRecord()->asFunctionEnvironmentRecord()->functionObject()->codeBlock()->asInterpretedCodeBlock();
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if (cblk->script() && cblk->byteCodeBlock() && std::find(codeBlocksInCurrentStack.begin(), codeBlocksInCurrentStack.end(), cblk) == codeBlocksInCurrentStack.end()) {
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codeBlocksInCurrentStack.push_back(cblk);
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}
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}
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}
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es = es->parent();
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}
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for (size_t i = 0; i < v.size(); i++) {
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if (std::find(codeBlocksInCurrentStack.begin(), codeBlocksInCurrentStack.end(), v[i]) == codeBlocksInCurrentStack.end()) {
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v[i]->m_byteCodeBlock = nullptr;
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}
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}
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v.clear();
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v.resizeWithUninitializedValues(codeBlocksInCurrentStack.size());
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for (size_t i = 0; i < codeBlocksInCurrentStack.size(); i++) {
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v[i] = codeBlocksInCurrentStack[i];
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currentCodeSizeTotal += v[i]->m_byteCodeBlock->memoryAllocatedSize();
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}
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}
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ASSERT(!m_codeBlock->hasCallNativeFunctionCode());
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volatile int sp;
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size_t currentStackBase = (size_t)&sp;
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#ifdef STACK_GROWS_DOWN
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size_t stackRemainApprox = STACK_LIMIT_FROM_BASE - (state.stackBase() - currentStackBase);
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#else
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size_t stackRemainApprox = STACK_LIMIT_FROM_BASE - (currentStackBase - state.stackBase());
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#endif
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state.context()->scriptParser().generateFunctionByteCode(state, m_codeBlock->asInterpretedCodeBlock(), stackRemainApprox);
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v.pushBack(m_codeBlock);
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currentCodeSizeTotal += m_codeBlock->m_byteCodeBlock->memoryAllocatedSize();
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}
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Value ScriptFunctionObject::call(ExecutionState& state, const Value& thisValue, const size_t argc, NULLABLE Value* argv)
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{
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ASSERT(!codeBlock()->hasCallNativeFunctionCode());
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return FunctionObjectProcessCallGenerator::processCall<ScriptFunctionObject, false, false, false, FunctionObjectThisValueBinder, FunctionObjectNewTargetBinder, FunctionObjectReturnValueBinder>(state, this, thisValue, argc, argv, nullptr);
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}
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class ScriptFunctionObjectObjectThisValueBinderWithConstruct {
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public:
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Value operator()(ExecutionState& calleeState, FunctionObject* self, const Value& thisArgument, bool isStrict)
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{
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ASSERT(thisArgument.isObject());
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return thisArgument;
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}
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};
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class ScriptFunctionObjectReturnValueBinderWithConstruct {
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public:
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Value operator()(ExecutionState& state, ScriptFunctionObject* self, const Value& interpreterReturnValue, const Value& thisArgument, FunctionEnvironmentRecord* record)
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{
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// Let result be OrdinaryCallEvaluateBody(F, argumentsList).
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const Value& result = interpreterReturnValue;
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// If result.[[type]] is return, then
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// If Type(result.[[value]]) is Object, return NormalCompletion(result.[[value]]).
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if (result.isObject()) {
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return result;
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}
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// If kind is "base", return NormalCompletion(thisArgument).
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// -> kind is always `base`
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return thisArgument;
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}
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};
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Object* ScriptFunctionObject::construct(ExecutionState& state, const size_t argc, NULLABLE Value* argv, Object* newTarget)
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{
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ASSERT(!codeBlock()->hasCallNativeFunctionCode());
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// Assert: Type(newTarget) is Object.
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ASSERT(newTarget->isObject());
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ASSERT(newTarget->isConstructor());
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// Let kind be F’s [[ConstructorKind]] internal slot.
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ASSERT(constructorKind() == ConstructorKind::Base); // this is always `Base` because we define ScriptClassConsturctor::construct
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CodeBlock* cb = codeBlock();
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FunctionObject* constructor = this;
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// Let thisArgument be OrdinaryCreateFromConstructor(newTarget, "%ObjectPrototype%").
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// OrdinaryCreateFromConstructor -> Let proto be GetPrototypeFromConstructor(constructor, intrinsicDefaultProto).
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// OrdinaryCreateFromConstructor -> GetPrototypeFromConstructor -> Let proto be Get(constructor, "prototype").
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Value proto = newTarget->get(state, ObjectPropertyName(state.context()->staticStrings().prototype)).value(state, newTarget);
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// OrdinaryCreateFromConstructor -> GetPrototypeFromConstructor -> If Type(proto) is not Object, then
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// OrdinaryCreateFromConstructor -> GetPrototypeFromConstructor -> Let realm be GetFunctionRealm(constructor).
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// OrdinaryCreateFromConstructor -> GetPrototypeFromConstructor -> ReturnIfAbrupt(realm).
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// OrdinaryCreateFromConstructor -> GetPrototypeFromConstructor -> Let proto be realm’s intrinsic object named intrinsicDefaultProto.
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if (!proto.isObject()) {
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proto = codeBlock()->context()->globalObject()->objectPrototype();
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}
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Object* thisArgument = new Object(state);
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// Set the [[Prototype]] internal slot of obj to proto.
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thisArgument->setPrototype(state, proto);
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// ReturnIfAbrupt(thisArgument).
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// We don't need to setNewTarget here
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// only `super` keyword uses getNewTarget on executing
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return FunctionObjectProcessCallGenerator::processCall<ScriptFunctionObject, true, false, false, ScriptFunctionObjectObjectThisValueBinderWithConstruct, FunctionObjectNewTargetBinder, ScriptFunctionObjectReturnValueBinderWithConstruct>(state, this, Value(thisArgument), argc, argv, newTarget).asObject();
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}
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void ScriptFunctionObject::generateArgumentsObject(ExecutionState& state, FunctionEnvironmentRecord* fnRecord, Value* stackStorage, bool isMapped)
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{
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AtomicString arguments = state.context()->staticStrings().arguments;
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if (fnRecord->isFunctionEnvironmentRecordNotIndexed()) {
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auto result = fnRecord->hasBinding(state, arguments);
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if (UNLIKELY(result.m_index == SIZE_MAX)) {
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fnRecord->createBinding(state, arguments, false, true);
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result = fnRecord->hasBinding(state, arguments);
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}
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fnRecord->initializeBinding(state, arguments, fnRecord->createArgumentsObject(state, isMapped));
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} else {
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const InterpretedCodeBlock::IdentifierInfoVector& v = fnRecord->functionObject()->codeBlock()->asInterpretedCodeBlock()->identifierInfos();
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for (size_t i = 0; i < v.size(); i++) {
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if (v[i].m_name == arguments) {
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if (v[i].m_needToAllocateOnStack) {
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stackStorage[v[i].m_indexForIndexedStorage] = fnRecord->createArgumentsObject(state, isMapped);
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} else {
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fnRecord->heapStorage()[v[i].m_indexForIndexedStorage] = fnRecord->createArgumentsObject(state, isMapped);
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}
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break;
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}
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}
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}
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}
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void ScriptFunctionObject::generateRestParameter(ExecutionState& state, FunctionEnvironmentRecord* record, Value* parameterStorageInStack, const size_t argc, Value* argv)
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{
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ArrayObject* newArray;
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size_t parameterLen = (size_t)m_codeBlock->parameterCount();
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if (argc > parameterLen) {
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size_t arrLen = argc - parameterLen;
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newArray = new ArrayObject(state, (double)arrLen);
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for (size_t i = 0; i < arrLen; i++) {
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newArray->setIndexedProperty(state, Value(i), argv[parameterLen + i]);
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}
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} else {
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newArray = new ArrayObject(state);
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}
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InterpretedCodeBlock::FunctionParametersInfo lastInfo = const_cast<InterpretedCodeBlock::FunctionParametersInfoVector&>(m_codeBlock->asInterpretedCodeBlock()->parametersInfomation()).back();
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if (!m_codeBlock->canUseIndexedVariableStorage()) {
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record->initializeBinding(state, lastInfo.m_name, Value(newArray));
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} else if (lastInfo.m_isHeapAllocated) {
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record->heapStorage()[lastInfo.m_index] = newArray;
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} else {
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parameterStorageInStack[lastInfo.m_index] = newArray;
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}
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}
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}
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