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| ****************************************************************************/ |
| #include <qv4argumentsobject_p.h> |
| #include <qv4arrayobject_p.h> |
| #include <qv4scopedvalue_p.h> |
| #include <qv4string_p.h> |
| #include <qv4function_p.h> |
| #include <qv4jscall_p.h> |
| #include <qv4symbol_p.h> |
| |
| #include <private/qv4alloca_p.h> |
| |
| using namespace QV4; |
| |
| DEFINE_OBJECT_VTABLE(ArgumentsObject); |
| DEFINE_OBJECT_VTABLE(StrictArgumentsObject); |
| |
| void Heap::StrictArgumentsObject::init(QV4::CppStackFrame *frame) |
| |
| { |
| Q_ASSERT(vtable() == QV4::StrictArgumentsObject::staticVTable()); |
| ExecutionEngine *v4 = internalClass->engine; |
| |
| Object::init(); |
| |
| Q_ASSERT(internalClass->verifyIndex(v4->id_callee()->propertyKey(), CalleePropertyIndex)); |
| Q_ASSERT(internalClass->findValueOrSetter(v4->id_callee()->propertyKey()).index == CalleeSetterPropertyIndex); |
| Q_ASSERT(internalClass->verifyIndex(v4->symbol_iterator()->propertyKey(), SymbolIteratorPropertyIndex)); |
| setProperty(v4, SymbolIteratorPropertyIndex, *v4->arrayProtoValues()); |
| setProperty(v4, CalleePropertyIndex, *v4->thrower()); |
| setProperty(v4, CalleeSetterPropertyIndex, *v4->thrower()); |
| |
| Scope scope(v4); |
| Scoped<QV4::StrictArgumentsObject> args(scope, this); |
| args->arrayReserve(frame->originalArgumentsCount); |
| args->arrayPut(0, frame->originalArguments, frame->originalArgumentsCount); |
| |
| Q_ASSERT(args->internalClass()->verifyIndex(v4->id_length()->propertyKey(), LengthPropertyIndex)); |
| setProperty(v4, LengthPropertyIndex, Value::fromInt32(frame->originalArgumentsCount)); |
| } |
| |
| void Heap::ArgumentsObject::init(QV4::CppStackFrame *frame) |
| { |
| ExecutionEngine *v4 = internalClass->engine; |
| |
| QV4::CallContext *context = static_cast<QV4::CallContext *>(frame->context()); |
| |
| Object::init(); |
| this->context.set(v4, context->d()); |
| Q_ASSERT(vtable() == QV4::ArgumentsObject::staticVTable()); |
| |
| Q_ASSERT(internalClass->verifyIndex(v4->id_callee()->propertyKey(), CalleePropertyIndex)); |
| setProperty(v4, CalleePropertyIndex, context->d()->function); |
| Q_ASSERT(internalClass->verifyIndex(v4->id_length()->propertyKey(), LengthPropertyIndex)); |
| setProperty(v4, LengthPropertyIndex, Value::fromInt32(context->argc())); |
| Q_ASSERT(internalClass->verifyIndex(v4->symbol_iterator()->propertyKey(), SymbolIteratorPropertyIndex)); |
| setProperty(v4, SymbolIteratorPropertyIndex, *v4->arrayProtoValues()); |
| |
| fullyCreated = false; |
| argCount = frame->originalArgumentsCount; |
| uint nFormals = frame->v4Function->nFormals; |
| mapped = nFormals > 63 ? std::numeric_limits<quint64>::max() : (1ull << nFormals) - 1; |
| } |
| |
| void ArgumentsObject::fullyCreate() |
| { |
| if (d()->fullyCreated) |
| return; |
| |
| Scope scope(engine()); |
| |
| arrayReserve(d()->argCount); |
| arrayPut(0, context()->args(), d()->argCount); |
| // Use a sparse array, so that method_getElement() doesn't shortcut |
| initSparseArray(); |
| |
| d()->fullyCreated = true; |
| } |
| |
| bool ArgumentsObject::virtualDefineOwnProperty(Managed *m, PropertyKey id, const Property *desc, PropertyAttributes attrs) |
| { |
| ArgumentsObject *args = static_cast<ArgumentsObject *>(m); |
| args->fullyCreate(); |
| if (!id.isArrayIndex()) |
| return Object::virtualDefineOwnProperty(m, id, desc, attrs); |
| |
| uint index = id.asArrayIndex(); |
| |
| if (!args->isMapped(index)) |
| return Object::virtualDefineOwnProperty(m, id, desc, attrs); |
| |
| Scope scope(args); |
| PropertyAttributes cAttrs = attrs; |
| ScopedProperty cDesc(scope); |
| cDesc->copy(desc, attrs); |
| |
| if (attrs.isData() && desc->value.isEmpty() && attrs.hasWritable() && !attrs.isWritable()) { |
| cDesc->value = args->context()->args()[index]; |
| cAttrs.setType(PropertyAttributes::Data); |
| } |
| |
| bool allowed = Object::virtualDefineOwnProperty(m, id, cDesc, cAttrs); |
| if (!allowed) |
| return false; |
| |
| if (attrs.isAccessor()) { |
| args->removeMapping(index); |
| } else { |
| if (!desc->value.isEmpty()) |
| args->context()->setArg(index, desc->value); |
| if (attrs.hasWritable() && !attrs.isWritable()) |
| args->removeMapping(index); |
| } |
| return true; |
| } |
| |
| ReturnedValue ArgumentsObject::virtualGet(const Managed *m, PropertyKey id, const Value *receiver, bool *hasProperty) |
| { |
| if (id.isArrayIndex()) { |
| const ArgumentsObject *args = static_cast<const ArgumentsObject *>(m); |
| uint index = id.asArrayIndex(); |
| if (index < args->d()->argCount && !args->d()->fullyCreated) { |
| if (hasProperty) |
| *hasProperty = true; |
| return args->context()->args()[index].asReturnedValue(); |
| } |
| |
| if (args->isMapped(index)) { |
| Q_ASSERT(index < static_cast<uint>(args->context()->function->formalParameterCount())); |
| if (hasProperty) |
| *hasProperty = true; |
| return args->context()->args()[index].asReturnedValue(); |
| } |
| } |
| |
| return Object::virtualGet(m, id, receiver, hasProperty); |
| } |
| |
| bool ArgumentsObject::virtualPut(Managed *m, PropertyKey id, const Value &value, Value *receiver) |
| { |
| if (id.isArrayIndex()) { |
| ArgumentsObject *args = static_cast<ArgumentsObject *>(m); |
| uint index = id.asArrayIndex(); |
| |
| if (args == receiver && index < args->d()->argCount && !args->d()->fullyCreated) { |
| args->context()->setArg(index, value); |
| return true; |
| } |
| |
| bool isMapped = (args == receiver && args->isMapped(index)); |
| if (isMapped) |
| args->context()->setArg(index, value); |
| } |
| |
| return Object::virtualPut(m, id, value, receiver); |
| } |
| |
| bool ArgumentsObject::virtualDeleteProperty(Managed *m, PropertyKey id) |
| { |
| ArgumentsObject *args = static_cast<ArgumentsObject *>(m); |
| args->fullyCreate(); |
| bool result = Object::virtualDeleteProperty(m, id); |
| if (result && id.isArrayIndex()) |
| args->removeMapping(id.asArrayIndex()); |
| return result; |
| } |
| |
| PropertyAttributes ArgumentsObject::virtualGetOwnProperty(const Managed *m, PropertyKey id, Property *p) |
| { |
| if (!id.isArrayIndex()) |
| return Object::virtualGetOwnProperty(m, id, p); |
| |
| const ArgumentsObject *args = static_cast<const ArgumentsObject *>(m); |
| uint index = id.asArrayIndex(); |
| if (index < args->d()->argCount && !args->d()->fullyCreated) { |
| p->value = args->context()->args()[index]; |
| return Attr_Data; |
| } |
| |
| PropertyAttributes attrs = Object::virtualGetOwnProperty(m, id, p); |
| if (attrs.isEmpty() || !args->isMapped(index)) |
| return attrs; |
| |
| Q_ASSERT(index < static_cast<uint>(args->context()->function->formalParameterCount())); |
| if (p) |
| p->value = args->context()->args()[index]; |
| return attrs; |
| } |
| |
| qint64 ArgumentsObject::virtualGetLength(const Managed *m) |
| { |
| const ArgumentsObject *a = static_cast<const ArgumentsObject *>(m); |
| return a->propertyData(Heap::ArgumentsObject::LengthPropertyIndex)->toLength(); |
| } |
| |
| OwnPropertyKeyIterator *ArgumentsObject::virtualOwnPropertyKeys(const Object *m, Value *target) |
| { |
| static_cast<ArgumentsObject *>(const_cast<Object *>(m))->fullyCreate(); |
| return Object::virtualOwnPropertyKeys(m, target); |
| } |