// Copyright (c) 2012, the Dart project authors. Please see the AUTHORS file // for details. All rights reserved. Use of this source code is governed by a // BSD-style license that can be found in the LICENSE file. #include "lib/invocation_mirror.h" #include "vm/bootstrap_natives.h" #include "vm/class_finalizer.h" #include "vm/compiler.h" #include "vm/dart_entry.h" #include "vm/exceptions.h" #include "vm/object_store.h" #include "vm/parser.h" #include "vm/port.h" #include "vm/resolver.h" #include "vm/symbols.h" namespace dart { DEFINE_FLAG(bool, use_mirrored_compilation_error, false, "Wrap compilation errors that occur during reflective access in a " "MirroredCompilationError, rather than suspending the isolate."); DEFINE_FLAG(bool, support_find_in_context, false, "Experimental support for ClosureMirror.findInContext."); static RawInstance* CreateMirror(const String& mirror_class_name, const Array& constructor_arguments) { const Library& mirrors_lib = Library::Handle(Library::MirrorsLibrary()); const String& constructor_name = Symbols::Dot(); const Object& result = Object::Handle( DartLibraryCalls::InstanceCreate(mirrors_lib, mirror_class_name, constructor_name, constructor_arguments)); ASSERT(!result.IsError()); return Instance::Cast(result).raw(); } static void ThrowMirroredCompilationError(const String& message) { Array& args = Array::Handle(Array::New(1)); args.SetAt(0, message); Exceptions::ThrowByType(Exceptions::kMirroredCompilationError, args); UNREACHABLE(); } static void ThrowInvokeError(const Error& error) { if (FLAG_use_mirrored_compilation_error && error.IsLanguageError()) { // A compilation error that was delayed by lazy compilation. const LanguageError& compilation_error = LanguageError::Cast(error); String& message = String::Handle(compilation_error.FormatMessage()); ThrowMirroredCompilationError(message); UNREACHABLE(); } Exceptions::PropagateError(error); UNREACHABLE(); } // Conventions: // * For throwing a NSM in a class klass we use its runtime type as receiver, // i.e., klass.RareType(). // * For throwing a NSM in a library, we just pass the null instance as // receiver. static void ThrowNoSuchMethod(const Instance& receiver, const String& function_name, const Function& function, const InvocationMirror::Call call, const InvocationMirror::Type type) { const Smi& invocation_type = Smi::Handle(Smi::New( InvocationMirror::EncodeType(call, type))); const Array& args = Array::Handle(Array::New(6)); args.SetAt(0, receiver); args.SetAt(1, function_name); args.SetAt(2, invocation_type); // Parameter 3 (actual arguments): We omit this parameter to get the same // error message as one would get by invoking the function non-reflectively. // Parameter 4 (named arguments): We omit this parameters since we cannot // invoke functions with named parameters reflectively (using mirrors). if (!function.IsNull()) { const int total_num_parameters = function.NumParameters(); const Array& array = Array::Handle(Array::New(total_num_parameters)); String& param_name = String::Handle(); for (int i = 0; i < total_num_parameters; i++) { param_name = function.ParameterNameAt(i); array.SetAt(i, param_name); } args.SetAt(5, array); } Exceptions::ThrowByType(Exceptions::kNoSuchMethod, args); UNREACHABLE(); } static void EnsureConstructorsAreCompiled(const Function& func) { // Only generative constructors can have initializing formals. if (!func.IsConstructor()) return; const Class& cls = Class::Handle(func.Owner()); const Error& error = Error::Handle(cls.EnsureIsFinalized(Isolate::Current())); if (!error.IsNull()) { ThrowInvokeError(error); UNREACHABLE(); } if (!func.HasCode()) { const Error& error = Error::Handle(Compiler::CompileFunction(func)); if (!error.IsNull()) { ThrowInvokeError(error); UNREACHABLE(); } } } static RawInstance* CreateParameterMirrorList(const Function& func, const Instance& owner_mirror) { HANDLESCOPE(Isolate::Current()); const intptr_t implicit_param_count = func.NumImplicitParameters(); const intptr_t non_implicit_param_count = func.NumParameters() - implicit_param_count; const intptr_t index_of_first_optional_param = non_implicit_param_count - func.NumOptionalParameters(); const intptr_t index_of_first_named_param = non_implicit_param_count - func.NumOptionalNamedParameters(); const Array& results = Array::Handle(Array::New(non_implicit_param_count)); const Array& args = Array::Handle(Array::New(9)); // Return for synthetic functions and getters. if (func.IsGetterFunction() || func.IsImplicitConstructor() || func.IsImplicitGetterFunction() || func.IsImplicitSetterFunction()) { return results.raw(); } Smi& pos = Smi::Handle(); String& name = String::Handle(); Instance& param = Instance::Handle(); Bool& is_final = Bool::Handle(); Object& default_value = Object::Handle(); Object& metadata = Object::Handle(); // We force compilation of constructors to ensure the types of initializing // formals have been corrected. We do not force the compilation of all types // of functions because some have no body, e.g. signature functions. EnsureConstructorsAreCompiled(func); // Reparse the function for the following information: // * The default value of a parameter. // * Whether a parameters has been deflared as final. // * Any metadata associated with the parameter. const Object& result = Object::Handle(Parser::ParseFunctionParameters(func)); if (result.IsError()) { ThrowInvokeError(Error::Cast(result)); UNREACHABLE(); } args.SetAt(0, MirrorReference::Handle(MirrorReference::New(func))); args.SetAt(2, owner_mirror); const Array& param_descriptor = Array::Cast(result); ASSERT(param_descriptor.Length() == (Parser::kParameterEntrySize * non_implicit_param_count)); for (intptr_t i = 0; i < non_implicit_param_count; i++) { pos ^= Smi::New(i); name ^= func.ParameterNameAt(implicit_param_count + i); is_final ^= param_descriptor.At( i * Parser::kParameterEntrySize + Parser::kParameterIsFinalOffset); default_value = param_descriptor.At( i * Parser::kParameterEntrySize + Parser::kParameterDefaultValueOffset); metadata = param_descriptor.At( i * Parser::kParameterEntrySize + Parser::kParameterMetadataOffset); ASSERT(default_value.IsNull() || default_value.IsInstance()); // Arguments 0 (referent) and 2 (owner) are the same for all parameters. See // above. args.SetAt(1, name); args.SetAt(3, pos); args.SetAt(4, Bool::Get(i >= index_of_first_optional_param)); args.SetAt(5, Bool::Get(i >= index_of_first_named_param)); args.SetAt(6, is_final); args.SetAt(7, default_value); args.SetAt(8, metadata); param ^= CreateMirror(Symbols::_LocalParameterMirror(), args); results.SetAt(i, param); } results.MakeImmutable(); return results.raw(); } static RawInstance* CreateTypeVariableMirror(const TypeParameter& param, const Instance& owner_mirror) { const Array& args = Array::Handle(Array::New(3)); args.SetAt(0, param); args.SetAt(1, String::Handle(param.name())); args.SetAt(2, owner_mirror); return CreateMirror(Symbols::_LocalTypeVariableMirror(), args); } // We create a list in native code and let Dart code create the type mirror // object and the ordered map. static RawInstance* CreateTypeVariableList(const Class& cls) { const TypeArguments& args = TypeArguments::Handle(cls.type_parameters()); if (args.IsNull()) { return Object::empty_array().raw(); } const Array& result = Array::Handle(Array::New(args.Length() * 2)); TypeParameter& type = TypeParameter::Handle(); String& name = String::Handle(); for (intptr_t i = 0; i < args.Length(); i++) { type ^= args.TypeAt(i); ASSERT(type.IsTypeParameter()); ASSERT(!type.IsMalformed()); ASSERT(type.IsFinalized()); name ^= type.name(); result.SetAt(2 * i, name); result.SetAt(2 * i + 1, type); } return result.raw(); } static RawInstance* CreateTypedefMirror(const Class& cls, const AbstractType& type, const Bool& is_declaration, const Instance& owner_mirror) { const Array& args = Array::Handle(Array::New(6)); args.SetAt(0, MirrorReference::Handle(MirrorReference::New(cls))); args.SetAt(1, type); args.SetAt(2, String::Handle(cls.Name())); args.SetAt(3, Bool::Get(cls.NumTypeParameters() != 0)); args.SetAt(4, cls.NumTypeParameters() == 0 ? Bool::False() : is_declaration); args.SetAt(5, owner_mirror); return CreateMirror(Symbols::_LocalTypedefMirror(), args); } static RawInstance* CreateFunctionTypeMirror(const Class& cls, const AbstractType& type) { const Array& args = Array::Handle(Array::New(2)); args.SetAt(0, MirrorReference::Handle(MirrorReference::New(cls))); args.SetAt(1, type); return CreateMirror(Symbols::_LocalFunctionTypeMirror(), args); } static RawInstance* CreateMethodMirror(const Function& func, const Instance& owner_mirror) { const Array& args = Array::Handle(Array::New(12)); args.SetAt(0, MirrorReference::Handle(MirrorReference::New(func))); String& name = String::Handle(func.name()); name = String::IdentifierPrettyNameRetainPrivate(name); args.SetAt(1, name); args.SetAt(2, owner_mirror); args.SetAt(3, Bool::Get(func.is_static())); args.SetAt(4, Bool::Get(func.is_abstract())); args.SetAt(5, Bool::Get(func.IsGetterFunction())); args.SetAt(6, Bool::Get(func.IsSetterFunction())); bool isConstructor = (func.kind() == RawFunction::kConstructor); args.SetAt(7, Bool::Get(isConstructor)); args.SetAt(8, Bool::Get(isConstructor && func.is_const())); args.SetAt(9, Bool::Get(isConstructor && func.IsConstructor())); args.SetAt(10, Bool::Get(isConstructor && func.is_redirecting())); args.SetAt(11, Bool::Get(isConstructor && func.IsFactory())); return CreateMirror(Symbols::_LocalMethodMirror(), args); } static RawInstance* CreateVariableMirror(const Field& field, const Instance& owner_mirror) { const MirrorReference& field_ref = MirrorReference::Handle(MirrorReference::New(field)); const String& name = String::Handle(field.name()); const Array& args = Array::Handle(Array::New(7)); args.SetAt(0, field_ref); args.SetAt(1, name); args.SetAt(2, owner_mirror); args.SetAt(3, Object::null_instance()); // Null for type. args.SetAt(4, Bool::Get(field.is_static())); args.SetAt(5, Bool::Get(field.is_final())); args.SetAt(6, Bool::Get(field.is_const())); return CreateMirror(Symbols::_LocalVariableMirror(), args); } static RawFunction* CallMethod(const Class& cls) { if (cls.IsSignatureClass()) { return cls.signature_function(); } Class& lookup_cls = Class::Handle(cls.raw()); Function& call_function = Function::Handle(); do { call_function = lookup_cls.LookupDynamicFunction(Symbols::Call()); if (!call_function.IsNull()) { return call_function.raw(); } lookup_cls = lookup_cls.SuperClass(); } while (!lookup_cls.IsNull()); return Function::null(); } static RawInstance* CreateClassMirror(const Class& cls, const AbstractType& type, const Bool& is_declaration, const Instance& owner_mirror) { ASSERT(!cls.IsDynamicClass() && !cls.IsVoidClass()); ASSERT(!type.IsNull()); ASSERT(type.IsFinalized()); ASSERT(!type.IsTypeRef()); if (cls.IsSignatureClass()) { if (cls.IsCanonicalSignatureClass()) { // We represent function types as canonical signature classes. return CreateFunctionTypeMirror(cls, type); } else { // We represent typedefs as non-canonical signature classes. return CreateTypedefMirror(cls, type, is_declaration, owner_mirror); } } const Bool& is_generic = Bool::Get(cls.NumTypeParameters() != 0); const Bool& is_mixin_app_alias = Bool::Get(cls.is_mixin_app_alias()); const Array& args = Array::Handle(Array::New(7)); args.SetAt(0, MirrorReference::Handle(MirrorReference::New(cls))); args.SetAt(1, type); // We do not set the names of anonymous mixin applications because the mirrors // use a different naming convention than the VM (lib.S with lib.M and S&M // respectively). if (!cls.IsAnonymousMixinApplication()) { args.SetAt(2, String::Handle(cls.Name())); } args.SetAt(3, owner_mirror); args.SetAt(4, is_generic); args.SetAt(5, is_mixin_app_alias); args.SetAt(6, cls.NumTypeParameters() == 0 ? Bool::False() : is_declaration); return CreateMirror(Symbols::_LocalClassMirror(), args); } static RawInstance* CreateLibraryMirror(const Library& lib) { const Array& args = Array::Handle(Array::New(3)); args.SetAt(0, MirrorReference::Handle(MirrorReference::New(lib))); String& str = String::Handle(); str = lib.name(); args.SetAt(1, str); str = lib.url(); args.SetAt(2, str); return CreateMirror(Symbols::_LocalLibraryMirror(), args); } static RawInstance* CreateTypeMirror(const AbstractType& type) { ASSERT(type.IsFinalized()); ASSERT(!type.IsMalformed()); ASSERT(!type.IsTypeRef()); if (type.HasResolvedTypeClass()) { const Class& cls = Class::Handle(type.type_class()); // Handle void and dynamic types. if (cls.IsVoidClass()) { Array& args = Array::Handle(Array::New(1)); args.SetAt(0, Symbols::Void()); // TODO(mlippautz): Create once in the VM isolate and retrieve from there. return CreateMirror(Symbols::_SpecialTypeMirror(), args); } else if (cls.IsDynamicClass()) { Array& args = Array::Handle(Array::New(1)); args.SetAt(0, Symbols::Dynamic()); // TODO(mlippautz): Create once in the VM isolate and retrieve from there. return CreateMirror(Symbols::_SpecialTypeMirror(), args); } return CreateClassMirror(cls, type, Bool::False(), Object::null_instance()); } else if (type.IsTypeParameter()) { return CreateTypeVariableMirror(TypeParameter::Cast(type), Object::null_instance()); } else if (type.IsBoundedType()) { AbstractType& actual_type = AbstractType::Handle(BoundedType::Cast(type).type()); return CreateTypeMirror(actual_type); } UNREACHABLE(); return Instance::null(); } static RawInstance* CreateIsolateMirror() { Isolate* isolate = Isolate::Current(); const String& debug_name = String::Handle(String::New(isolate->name())); const Library& root_library = Library::Handle(isolate, isolate->object_store()->root_library()); const Instance& root_library_mirror = Instance::Handle(CreateLibraryMirror(root_library)); const Array& args = Array::Handle(Array::New(2)); args.SetAt(0, debug_name); args.SetAt(1, root_library_mirror); return CreateMirror(Symbols::_LocalIsolateMirror(), args); } static RawInstance* CreateMirrorSystem() { Isolate* isolate = Isolate::Current(); const GrowableObjectArray& libraries = GrowableObjectArray::Handle(isolate->object_store()->libraries()); const int num_libraries = libraries.Length(); const Array& library_mirrors = Array::Handle(Array::New(num_libraries)); Library& library = Library::Handle(); Instance& library_mirror = Instance::Handle(); for (int i = 0; i < num_libraries; i++) { library ^= libraries.At(i); library_mirror = CreateLibraryMirror(library); library_mirrors.SetAt(i, library_mirror); } const Instance& isolate_mirror = Instance::Handle(CreateIsolateMirror()); const Array& args = Array::Handle(Array::New(2)); args.SetAt(0, library_mirrors); args.SetAt(1, isolate_mirror); return CreateMirror(Symbols::_LocalMirrorSystem(), args); } static RawInstance* ReturnResult(const Object& result) { if (result.IsError()) { ThrowInvokeError(Error::Cast(result)); UNREACHABLE(); } if (result.IsInstance()) { return Instance::Cast(result).raw(); } ASSERT(result.IsNull()); return Instance::null(); } // Invoke the function, or noSuchMethod if it is null. Propagate any unhandled // exceptions. Wrap and propagate any compilation errors. static RawInstance* InvokeDynamicFunction( const Instance& receiver, const Function& function, const String& target_name, const Array& args, const Array& args_descriptor_array) { // Note "args" is already the internal arguments with the receiver as the // first element. Object& result = Object::Handle(); ArgumentsDescriptor args_descriptor(args_descriptor_array); if (function.IsNull() || !function.is_visible() || !function.AreValidArguments(args_descriptor, NULL)) { result = DartEntry::InvokeNoSuchMethod(receiver, target_name, args, args_descriptor_array); } else { result = DartEntry::InvokeFunction(function, args, args_descriptor_array); } return ReturnResult(result); } static RawInstance* InvokeLibraryGetter(const Library& library, const String& getter_name, const bool throw_nsm_if_absent) { // To access a top-level we may need to use the Field or the getter Function. // The getter function may either be in the library or in the field's owner // class, depending on whether it was an actual getter, or an uninitialized // field. const Field& field = Field::Handle( library.LookupLocalField(getter_name)); Function& getter = Function::Handle(); if (field.IsNull()) { // No field found. Check for a getter in the lib. const String& internal_getter_name = String::Handle(Field::GetterName(getter_name)); getter = library.LookupLocalFunction(internal_getter_name); if (getter.IsNull()) { getter = library.LookupLocalFunction(getter_name); if (!getter.IsNull()) { // Looking for a getter but found a regular method: closurize it. const Function& closure_function = Function::Handle(getter.ImplicitClosureFunction()); return closure_function.ImplicitStaticClosure(); } } } else { if (!field.IsUninitialized()) { return field.value(); } // An uninitialized field was found. Check for a getter in the field's // owner classs. const Class& klass = Class::Handle(field.owner()); const String& internal_getter_name = String::Handle(Field::GetterName(getter_name)); getter = klass.LookupStaticFunction(internal_getter_name); } if (!getter.IsNull() && getter.is_visible()) { // Invoke the getter and return the result. const Object& result = Object::Handle( DartEntry::InvokeFunction(getter, Object::empty_array())); return ReturnResult(result); } if (throw_nsm_if_absent) { ThrowNoSuchMethod(Instance::null_instance(), getter_name, getter, InvocationMirror::kTopLevel, InvocationMirror::kGetter); UNREACHABLE(); } // Fall through case: Indicate that we didn't find any function or field using // a special null instance. This is different from a field being null. Callers // make sure that this null does not leak into Dartland. return Object::sentinel().raw(); } // TODO(13656): Remove AllowPrivate. static RawInstance* InvokeLibraryGetterAllowImports( const Library& library, const String& getter_name, const bool throw_nsm_if_absent) { // To access a top-level we may need to use the Field or the getter Function. // The getter function may either be in the library or in the field's owner // class, depending on whether it was an actual getter, or an uninitialized // field. const Field& field = Field::Handle( library.LookupFieldAllowPrivate(getter_name)); Function& getter = Function::Handle(); if (field.IsNull()) { // No field found. Check for a getter in the lib. const String& internal_getter_name = String::Handle(Field::GetterName(getter_name)); getter = library.LookupFunctionAllowPrivate(internal_getter_name); if (getter.IsNull()) { getter = library.LookupFunctionAllowPrivate(getter_name); if (!getter.IsNull()) { // Looking for a getter but found a regular method: closurize it. const Function& closure_function = Function::Handle(getter.ImplicitClosureFunction()); return closure_function.ImplicitStaticClosure(); } } } else { if (!field.IsUninitialized()) { return field.value(); } // An uninitialized field was found. Check for a getter in the field's // owner classs. const Class& klass = Class::Handle(field.owner()); const String& internal_getter_name = String::Handle(Field::GetterName(getter_name)); getter = klass.LookupStaticFunction(internal_getter_name); } if (!getter.IsNull() && getter.is_visible()) { // Invoke the getter and return the result. const Object& result = Object::Handle( DartEntry::InvokeFunction(getter, Object::empty_array())); return ReturnResult(result); } if (throw_nsm_if_absent) { ThrowNoSuchMethod(Instance::null_instance(), getter_name, getter, InvocationMirror::kTopLevel, InvocationMirror::kGetter); UNREACHABLE(); } // Fall through case: Indicate that we didn't find any function or field using // a special null instance. This is different from a field being null. Callers // make sure that this null does not leak into Dartland. return Object::sentinel().raw(); } static RawInstance* InvokeClassGetter(const Class& klass, const String& getter_name, const bool throw_nsm_if_absent) { // Note static fields do not have implicit getters. const Field& field = Field::Handle(klass.LookupStaticField(getter_name)); if (field.IsNull() || field.IsUninitialized()) { const String& internal_getter_name = String::Handle( Field::GetterName(getter_name)); Function& getter = Function::Handle( klass.LookupStaticFunction(internal_getter_name)); if (getter.IsNull() || !getter.is_visible()) { if (getter.IsNull()) { getter = klass.LookupStaticFunction(getter_name); if (!getter.IsNull()) { // Looking for a getter but found a regular method: closurize it. const Function& closure_function = Function::Handle(getter.ImplicitClosureFunction()); return closure_function.ImplicitStaticClosure(); } } if (throw_nsm_if_absent) { ThrowNoSuchMethod(AbstractType::Handle(klass.RareType()), getter_name, getter, InvocationMirror::kStatic, InvocationMirror::kGetter); UNREACHABLE(); } // Fall through case: Indicate that we didn't find any function or field // using a special null instance. This is different from a field being // null. Callers make sure that this null does not leak into Dartland. return Object::sentinel().raw(); } // Invoke the getter and return the result. const Object& result = Object::Handle( DartEntry::InvokeFunction(getter, Object::empty_array())); return ReturnResult(result); } return field.value(); } static RawInstance* InvokeInstanceGetter(const Class& klass, const Instance& reflectee, const String& getter_name, const bool throw_nsm_if_absent) { const String& internal_getter_name = String::Handle( Field::GetterName(getter_name)); Function& function = Function::Handle( Resolver::ResolveDynamicAnyArgs(klass, internal_getter_name)); if (!function.IsNull() || throw_nsm_if_absent) { const int kNumArgs = 1; const Array& args = Array::Handle(Array::New(kNumArgs)); args.SetAt(0, reflectee); const Array& args_descriptor = Array::Handle(ArgumentsDescriptor::New(args.Length())); // InvokeDynamic invokes NoSuchMethod if the provided function is null. return InvokeDynamicFunction(reflectee, function, internal_getter_name, args, args_descriptor); } // Fall through case: Indicate that we didn't find any function or field using // a special null instance. This is different from a field being null. Callers // make sure that this null does not leak into Dartland. return Object::sentinel().raw(); } static RawInstance* LookupFunctionOrFieldInLibraryPrefix( const LibraryPrefix& prefix, const String& lookup_name) { const Object& entry = Object::Handle(prefix.LookupObject(lookup_name)); if (!entry.IsNull()) { if (entry.IsField()) { const Field& field = Field::Cast(entry); const Class& field_owner = Class::Handle(field.owner()); const Library& field_library = Library::Handle(field_owner.library()); const Instance& result = Instance::Handle( InvokeLibraryGetterAllowImports(field_library, lookup_name, false)); if (result.raw() != Object::sentinel().raw()) { return result.raw(); } } else if (entry.IsFunction()) { const Function& func = Function::Cast(entry); const Function& closure_function = Function::Handle( func.ImplicitClosureFunction()); return closure_function.ImplicitStaticClosure(); } } // Fall through case: Indicate that we didn't find any function or field using // a special null instance. This is different from a field being null. Callers // make sure that this null does not leak into Dartland. return Object::sentinel().raw(); } static RawInstance* LookupStaticFunctionOrFieldInClass( const Class& klass, const String& lookup_name) { Instance& result = Instance::Handle( InvokeClassGetter(klass, lookup_name, false)); if (result.raw() != Object::sentinel().raw()) { return result.raw(); } const Function& func = Function::Handle(klass.LookupStaticFunction(lookup_name)); if (!func.IsNull()) { const Function& closure_function = Function::Handle( func.ImplicitClosureFunction()); ASSERT(!closure_function.IsNull()); return closure_function.ImplicitStaticClosure(); } // Fall through case: Indicate that we didn't find any function or field using // a special null instance. This is different from a field being null. Callers // make sure that this null does not leak into Dartland. return Object::sentinel().raw(); } static RawInstance* LookupFunctionOrFieldInFunctionContext( const Function& func, const Context& ctx, const String& lookup_name) { const ContextScope& ctx_scope = ContextScope::Handle(func.context_scope()); intptr_t this_index = -1; // Search local context. String& name = String::Handle(); for (intptr_t i = 0; i < ctx_scope.num_variables(); i++) { name ^= ctx_scope.NameAt(i); if (name.Equals(lookup_name)) { return ctx.At(i); } else if (name.Equals(Symbols::This())) { // Record instance index to search for the field in the instance // afterwards. this_index = i; } } // Search the instance this function is attached to. if (this_index >= 0) { // Since we want the closurized version of a function, we can access, both, // functions and fields through their implicit getter name. If the implicit // getter does not exist for the function, a method extractor will be // created. const Class& owner = Class::Handle(func.Owner()); const Instance& receiver = Instance::Handle(ctx.At(this_index)); return InvokeInstanceGetter(owner, receiver, lookup_name, false); } // Fall through case: Indicate that we didn't find any function or field using // a special null instance. This is different from a field being null. Callers // make sure that this null does not leak into Dartland. return Object::sentinel().raw(); } static RawInstance* LookupFunctionOrFieldInLibraryHelper( const Library& library, const String& class_name, const String& lookup_name) { if (class_name.IsNull()) { const Instance& result = Instance::Handle( InvokeLibraryGetterAllowImports(library, lookup_name, false)); if (result.raw() != Object::sentinel().raw()) { return result.raw(); } const Function& func = Function::Handle( library.LookupLocalFunction(lookup_name)); if (!func.IsNull()) { const Function& closure_function = Function::Handle( func.ImplicitClosureFunction()); return closure_function.ImplicitStaticClosure(); } } else { const Class& cls = Class::Handle( library.LookupClass(class_name)); if (!cls.IsNull()) { return LookupStaticFunctionOrFieldInClass(cls, lookup_name); } } // Fall through case: Indicate that we didn't find any function or field using // a special null instance. This is different from a field being null. Callers // make sure that this null does not leak into Dartland. return Object::sentinel().raw(); } static RawInstance* LookupFunctionOrFieldInLibrary(const Library& library, const String& class_name, const String& lookup_name) { Instance& result = Instance::Handle(); // Check current library. result ^= LookupFunctionOrFieldInLibraryHelper( library, class_name, lookup_name); if (result.raw() != Object::sentinel().raw()) { return result.raw(); } // Check all imports. Library& lib_it = Library::Handle(); for (intptr_t i = 0; i < library.num_imports(); i++) { lib_it ^= library.ImportLibraryAt(i); result ^= LookupFunctionOrFieldInLibraryHelper( lib_it, class_name, lookup_name); if (result.raw() != Object::sentinel().raw()) { return result.raw(); } } // Fall through case: Indicate that we didn't find any function or field using // a special null instance. This is different from a field being null. Callers // make sure that this null does not leak into Dartland. return Object::sentinel().raw(); } static RawAbstractType* InstantiateType(const AbstractType& type, const AbstractType& instantiator) { ASSERT(type.IsFinalized()); ASSERT(!type.IsMalformed()); if (type.IsInstantiated()) { return type.Canonicalize(); } ASSERT(!instantiator.IsNull()); ASSERT(instantiator.IsFinalized()); ASSERT(!instantiator.IsMalformed()); const AbstractTypeArguments& type_args = AbstractTypeArguments::Handle(instantiator.arguments()); Error& bound_error = Error::Handle(); AbstractType& result = AbstractType::Handle(type.InstantiateFrom(type_args, &bound_error)); if (!bound_error.IsNull()) { ThrowInvokeError(bound_error); UNREACHABLE(); } ASSERT(result.IsFinalized()); return result.Canonicalize(); } DEFINE_NATIVE_ENTRY(Mirrors_makeLocalMirrorSystem, 0) { return CreateMirrorSystem(); } DEFINE_NATIVE_ENTRY(Mirrors_makeLocalClassMirror, 1) { GET_NON_NULL_NATIVE_ARGUMENT(AbstractType, type, arguments->NativeArgAt(0)); ASSERT(!type.IsMalformed()); ASSERT(type.IsFinalized()); ASSERT(type.HasResolvedTypeClass()); const Class& cls = Class::Handle(type.type_class()); ASSERT(!cls.IsNull()); if (cls.IsDynamicClass() || cls.IsVoidClass() || (cls.IsSignatureClass() && !cls.IsCanonicalSignatureClass())) { Exceptions::ThrowArgumentError(type); UNREACHABLE(); } return CreateClassMirror(cls, AbstractType::Handle(cls.DeclarationType()), Bool::True(), // is_declaration Object::null_instance()); } DEFINE_NATIVE_ENTRY(Mirrors_makeLocalTypeMirror, 1) { GET_NON_NULL_NATIVE_ARGUMENT(AbstractType, type, arguments->NativeArgAt(0)); return CreateTypeMirror(type); } DEFINE_NATIVE_ENTRY(Mirrors_mangleName, 2) { GET_NON_NULL_NATIVE_ARGUMENT(String, name, arguments->NativeArgAt(0)); GET_NON_NULL_NATIVE_ARGUMENT(MirrorReference, ref, arguments->NativeArgAt(1)); const Library& lib = Library::Handle(ref.GetLibraryReferent()); return lib.IsPrivate(name) ? lib.PrivateName(name) : name.raw(); } DEFINE_NATIVE_ENTRY(MirrorReference_equals, 2) { GET_NON_NULL_NATIVE_ARGUMENT(MirrorReference, a, arguments->NativeArgAt(0)); GET_NON_NULL_NATIVE_ARGUMENT(MirrorReference, b, arguments->NativeArgAt(1)); return Bool::Get(a.referent() == b.referent()).raw(); } DEFINE_NATIVE_ENTRY(DeclarationMirror_metadata, 1) { GET_NON_NULL_NATIVE_ARGUMENT(Instance, reflectee, arguments->NativeArgAt(0)); Object& decl = Object::Handle(); if (reflectee.IsMirrorReference()) { const MirrorReference& decl_ref = MirrorReference::Cast(reflectee); decl = decl_ref.referent(); } else if (reflectee.IsTypeParameter()) { decl = reflectee.raw(); } else { UNREACHABLE(); } Class& klass = Class::Handle(); Library& library = Library::Handle(); if (decl.IsClass()) { klass ^= decl.raw(); library = klass.library(); } else if (decl.IsFunction()) { klass = Function::Cast(decl).origin(); library = klass.library(); } else if (decl.IsField()) { klass = Field::Cast(decl).origin(); library = klass.library(); } else if (decl.IsLibrary()) { library ^= decl.raw(); } else if (decl.IsTypeParameter()) { klass ^= TypeParameter::Cast(decl).parameterized_class(); library = klass.library(); } else { return Object::empty_array().raw(); } const Object& metadata = Object::Handle(library.GetMetadata(decl)); if (metadata.IsError()) { ThrowInvokeError(Error::Cast(metadata)); } return metadata.raw(); } DEFINE_NATIVE_ENTRY(FunctionTypeMirror_call_method, 2) { GET_NON_NULL_NATIVE_ARGUMENT(Instance, owner_mirror, arguments->NativeArgAt(0)); GET_NON_NULL_NATIVE_ARGUMENT(MirrorReference, ref, arguments->NativeArgAt(1)); const Class& cls = Class::Handle(ref.GetClassReferent()); const Function& func = Function::Handle(CallMethod(cls)); ASSERT(!func.IsNull()); return CreateMethodMirror(func, owner_mirror); } DEFINE_NATIVE_ENTRY(FunctionTypeMirror_parameters, 2) { GET_NON_NULL_NATIVE_ARGUMENT(Instance, owner, arguments->NativeArgAt(0)); GET_NON_NULL_NATIVE_ARGUMENT(MirrorReference, ref, arguments->NativeArgAt(1)); const Class& cls = Class::Handle(ref.GetClassReferent()); const Function& func = Function::Handle(cls.signature_function()); return CreateParameterMirrorList(func, owner); } DEFINE_NATIVE_ENTRY(FunctionTypeMirror_return_type, 2) { GET_NON_NULL_NATIVE_ARGUMENT(MirrorReference, ref, arguments->NativeArgAt(0)); GET_NON_NULL_NATIVE_ARGUMENT(AbstractType, instantiator, arguments->NativeArgAt(1)); const Class& cls = Class::Handle(ref.GetClassReferent()); const Function& func = Function::Handle(CallMethod(cls)); ASSERT(!func.IsNull()); AbstractType& type = AbstractType::Handle(func.result_type()); return InstantiateType(type, instantiator); } DEFINE_NATIVE_ENTRY(ClassMirror_library, 1) { GET_NON_NULL_NATIVE_ARGUMENT(MirrorReference, ref, arguments->NativeArgAt(0)); const Class& klass = Class::Handle(ref.GetClassReferent()); const Library& library = Library::Handle(klass.library()); ASSERT(!library.IsNull()); return CreateLibraryMirror(library); } DEFINE_NATIVE_ENTRY(ClassMirror_supertype, 1) { GET_NON_NULL_NATIVE_ARGUMENT(AbstractType, type, arguments->NativeArgAt(0)); ASSERT(!type.IsMalformed()); ASSERT(type.IsFinalized()); if (!type.HasResolvedTypeClass()) { Exceptions::ThrowArgumentError(type); UNREACHABLE(); } const Class& cls = Class::Handle(type.type_class()); const AbstractType& super_type = AbstractType::Handle(cls.super_type()); ASSERT(super_type.IsNull() || super_type.IsFinalized()); return super_type.raw(); } DEFINE_NATIVE_ENTRY(ClassMirror_supertype_instantiated, 1) { GET_NON_NULL_NATIVE_ARGUMENT(AbstractType, type, arguments->NativeArgAt(0)); ASSERT(!type.IsMalformed()); ASSERT(type.IsFinalized()); if (!type.HasResolvedTypeClass()) { Exceptions::ThrowArgumentError(type); UNREACHABLE(); } const Class& cls = Class::Handle(type.type_class()); const AbstractType& super_type = AbstractType::Handle(cls.super_type()); return InstantiateType(super_type, type); } DEFINE_NATIVE_ENTRY(ClassMirror_interfaces, 1) { GET_NON_NULL_NATIVE_ARGUMENT(AbstractType, type, arguments->NativeArgAt(0)); ASSERT(!type.IsMalformed()); ASSERT(type.IsFinalized()); if (!type.HasResolvedTypeClass()) { Exceptions::ThrowArgumentError(type); UNREACHABLE(); } const Class& cls = Class::Handle(type.type_class()); const Error& error = Error::Handle(cls.EnsureIsFinalized(isolate)); if (!error.IsNull()) { ThrowInvokeError(error); } return cls.interfaces(); } DEFINE_NATIVE_ENTRY(ClassMirror_interfaces_instantiated, 1) { GET_NON_NULL_NATIVE_ARGUMENT(AbstractType, type, arguments->NativeArgAt(0)); ASSERT(!type.IsMalformed()); ASSERT(type.IsFinalized()); if (!type.HasResolvedTypeClass()) { Exceptions::ThrowArgumentError(type); UNREACHABLE(); } const Class& cls = Class::Handle(type.type_class()); const Error& error = Error::Handle(cls.EnsureIsFinalized(isolate)); if (!error.IsNull()) { ThrowInvokeError(error); } Array& interfaces = Array::Handle(cls.interfaces()); Array& interfaces_inst = Array::Handle(Array::New(interfaces.Length())); AbstractType& interface = AbstractType::Handle(); for (int i = 0; i < interfaces.Length(); i++) { interface ^= interfaces.At(i); interface = InstantiateType(interface, type); interfaces_inst.SetAt(i, interface); } return interfaces_inst.raw(); } DEFINE_NATIVE_ENTRY(ClassMirror_mixin, 1) { GET_NON_NULL_NATIVE_ARGUMENT(AbstractType, type, arguments->NativeArgAt(0)); ASSERT(!type.IsMalformed()); ASSERT(type.IsFinalized()); if (!type.HasResolvedTypeClass()) { Exceptions::ThrowArgumentError(type); UNREACHABLE(); } const Class& cls = Class::Handle(type.type_class()); const AbstractType& mixin_type = AbstractType::Handle(cls.mixin()); ASSERT(mixin_type.IsNull() || mixin_type.IsFinalized()); return mixin_type.raw(); } DEFINE_NATIVE_ENTRY(ClassMirror_mixin_instantiated, 2) { GET_NON_NULL_NATIVE_ARGUMENT(AbstractType, type, arguments->NativeArgAt(0)); GET_NON_NULL_NATIVE_ARGUMENT(AbstractType, instantiator, arguments->NativeArgAt(1)); ASSERT(!type.IsMalformed()); ASSERT(type.IsFinalized()); if (!type.HasResolvedTypeClass()) { Exceptions::ThrowArgumentError(type); UNREACHABLE(); } const Class& cls = Class::Handle(type.type_class()); const AbstractType& mixin_type = AbstractType::Handle(cls.mixin()); if (mixin_type.IsNull()) { return mixin_type.raw(); } return InstantiateType(mixin_type, instantiator); } DEFINE_NATIVE_ENTRY(ClassMirror_members, 2) { GET_NON_NULL_NATIVE_ARGUMENT(Instance, owner_mirror, arguments->NativeArgAt(0)); GET_NON_NULL_NATIVE_ARGUMENT(MirrorReference, ref, arguments->NativeArgAt(1)); const Class& klass = Class::Handle(ref.GetClassReferent()); const Error& error = Error::Handle(klass.EnsureIsFinalized(isolate)); if (!error.IsNull()) { ThrowInvokeError(error); } const Array& fields = Array::Handle(klass.fields()); const intptr_t num_fields = fields.Length(); const Array& functions = Array::Handle(klass.functions()); const intptr_t num_functions = functions.Length(); Instance& member_mirror = Instance::Handle(); const GrowableObjectArray& member_mirrors = GrowableObjectArray::Handle( GrowableObjectArray::New(num_fields + num_functions)); Field& field = Field::Handle(); for (intptr_t i = 0; i < num_fields; i++) { field ^= fields.At(i); member_mirror = CreateVariableMirror(field, owner_mirror); member_mirrors.Add(member_mirror); } Function& func = Function::Handle(); for (intptr_t i = 0; i < num_functions; i++) { func ^= functions.At(i); if (func.is_visible() && (func.kind() == RawFunction::kRegularFunction || func.kind() == RawFunction::kGetterFunction || func.kind() == RawFunction::kSetterFunction)) { member_mirror = CreateMethodMirror(func, owner_mirror); member_mirrors.Add(member_mirror); } } return member_mirrors.raw(); } DEFINE_NATIVE_ENTRY(ClassMirror_constructors, 2) { GET_NON_NULL_NATIVE_ARGUMENT(Instance, owner_mirror, arguments->NativeArgAt(0)); GET_NON_NULL_NATIVE_ARGUMENT(MirrorReference, ref, arguments->NativeArgAt(1)); const Class& klass = Class::Handle(ref.GetClassReferent()); const Error& error = Error::Handle(klass.EnsureIsFinalized(isolate)); if (!error.IsNull()) { ThrowInvokeError(error); } const Array& functions = Array::Handle(klass.functions()); const intptr_t num_functions = functions.Length(); Instance& constructor_mirror = Instance::Handle(); const GrowableObjectArray& constructor_mirrors = GrowableObjectArray::Handle( GrowableObjectArray::New(num_functions)); Function& func = Function::Handle(); for (intptr_t i = 0; i < num_functions; i++) { func ^= functions.At(i); if (func.kind() == RawFunction::kConstructor) { constructor_mirror = CreateMethodMirror(func, owner_mirror); constructor_mirrors.Add(constructor_mirror); } } return constructor_mirrors.raw(); } DEFINE_NATIVE_ENTRY(LibraryMirror_members, 2) { GET_NON_NULL_NATIVE_ARGUMENT(Instance, owner_mirror, arguments->NativeArgAt(0)); GET_NON_NULL_NATIVE_ARGUMENT(MirrorReference, ref, arguments->NativeArgAt(1)); const Library& library = Library::Handle(ref.GetLibraryReferent()); Instance& member_mirror = Instance::Handle(); const GrowableObjectArray& member_mirrors = GrowableObjectArray::Handle(GrowableObjectArray::New()); Object& entry = Object::Handle(); DictionaryIterator entries(library); AbstractType& type = AbstractType::Handle(); while (entries.HasNext()) { entry = entries.GetNext(); if (entry.IsClass()) { const Class& klass = Class::Cast(entry); // We filter out function signature classes and dynamic. // TODO(12478): Should not need to filter out dynamic. if (!klass.IsCanonicalSignatureClass() && !klass.IsDynamicClass() && !klass.IsAnonymousMixinApplication()) { type = klass.DeclarationType(); member_mirror = CreateClassMirror(klass, type, Bool::True(), // is_declaration owner_mirror); member_mirrors.Add(member_mirror); } } else if (entry.IsField()) { const Field& field = Field::Cast(entry); member_mirror = CreateVariableMirror(field, owner_mirror); member_mirrors.Add(member_mirror); } else if (entry.IsFunction()) { const Function& func = Function::Cast(entry); if (func.kind() == RawFunction::kRegularFunction || func.kind() == RawFunction::kGetterFunction || func.kind() == RawFunction::kSetterFunction) { member_mirror = CreateMethodMirror(func, owner_mirror); member_mirrors.Add(member_mirror); } } } return member_mirrors.raw(); } DEFINE_NATIVE_ENTRY(ClassMirror_type_variables, 1) { GET_NON_NULL_NATIVE_ARGUMENT(MirrorReference, ref, arguments->NativeArgAt(0)); const Class& klass = Class::Handle(ref.GetClassReferent()); return CreateTypeVariableList(klass); } DEFINE_NATIVE_ENTRY(ClassMirror_type_arguments, 1) { GET_NON_NULL_NATIVE_ARGUMENT(AbstractType, type, arguments->NativeArgAt(0)); const Class& cls = Class::Handle(type.type_class()); const intptr_t num_params = cls.NumTypeParameters(); if (num_params == 0) { return Object::empty_array().raw(); } const Array& result = Array::Handle(Array::New(num_params)); AbstractType& arg_type = AbstractType::Handle(); Instance& type_mirror = Instance::Handle(); const AbstractTypeArguments& args = AbstractTypeArguments::Handle(type.arguments()); // Handle argument lists that have been optimized away, because either no // arguments have been provided, or all arguments are dynamic. Return a list // of typemirrors on dynamic in this case. if (args.IsNull()) { arg_type ^= Object::dynamic_type(); type_mirror ^= CreateTypeMirror(arg_type); for (intptr_t i = 0; i < num_params; i++) { result.SetAt(i, type_mirror); } return result.raw(); } ASSERT(args.Length() >= num_params); const intptr_t num_inherited_args = args.Length() - num_params; for (intptr_t i = 0; i < num_params; i++) { arg_type ^= args.TypeAt(i + num_inherited_args); arg_type = arg_type.Canonicalize(); // Necessary for recursive types. type_mirror = CreateTypeMirror(arg_type); result.SetAt(i, type_mirror); } return result.raw(); } DEFINE_NATIVE_ENTRY(TypeVariableMirror_owner, 1) { GET_NON_NULL_NATIVE_ARGUMENT(TypeParameter, param, arguments->NativeArgAt(0)); const Class& owner = Class::Handle(param.parameterized_class()); const AbstractType& type = AbstractType::Handle(owner.DeclarationType()); return CreateClassMirror(owner, type, Bool::True(), // is_declaration Instance::null_instance()); } DEFINE_NATIVE_ENTRY(TypeVariableMirror_upper_bound, 1) { GET_NON_NULL_NATIVE_ARGUMENT(TypeParameter, param, arguments->NativeArgAt(0)); return param.bound(); } DEFINE_NATIVE_ENTRY(TypedefMirror_declaration, 1) { GET_NON_NULL_NATIVE_ARGUMENT(Type, type, arguments->NativeArgAt(0)); const Class& cls = Class::Handle(type.type_class()); // We represent typedefs as non-canonical signature classes. ASSERT(cls.IsSignatureClass() && !cls.IsCanonicalSignatureClass()); return CreateTypedefMirror(cls, AbstractType::Handle(cls.DeclarationType()), Bool::True(), // is_declaration Object::null_instance()); } DEFINE_NATIVE_ENTRY(InstanceMirror_invoke, 5) { // Argument 0 is the mirror, which is unused by the native. It exists // because this native is an instance method in order to be polymorphic // with its cousins. GET_NATIVE_ARGUMENT(Instance, reflectee, arguments->NativeArgAt(1)); GET_NON_NULL_NATIVE_ARGUMENT( String, function_name, arguments->NativeArgAt(2)); GET_NON_NULL_NATIVE_ARGUMENT(Array, args, arguments->NativeArgAt(3)); GET_NON_NULL_NATIVE_ARGUMENT(Array, arg_names, arguments->NativeArgAt(4)); Class& klass = Class::Handle(reflectee.clazz()); Function& function = Function::Handle( Resolver::ResolveDynamicAnyArgs(klass, function_name)); const Array& args_descriptor = Array::Handle(ArgumentsDescriptor::New(args.Length(), arg_names)); if (function.IsNull()) { // Didn't find a method: try to find a getter and invoke call on its result. const String& getter_name = String::Handle(Field::GetterName(function_name)); function = Resolver::ResolveDynamicAnyArgs(klass, getter_name); if (!function.IsNull()) { ASSERT(function.kind() != RawFunction::kMethodExtractor); // Invoke the getter. const int kNumArgs = 1; const Array& getter_args = Array::Handle(Array::New(kNumArgs)); getter_args.SetAt(0, reflectee); const Array& getter_args_descriptor = Array::Handle(ArgumentsDescriptor::New(getter_args.Length())); const Instance& getter_result = Instance::Handle( InvokeDynamicFunction(reflectee, function, getter_name, getter_args, getter_args_descriptor)); // Replace the closure as the receiver in the arguments list. args.SetAt(0, getter_result); // Call the closure. const Object& call_result = Object::Handle(DartEntry::InvokeClosure(args, args_descriptor)); if (call_result.IsError()) { ThrowInvokeError(Error::Cast(call_result)); UNREACHABLE(); } return call_result.raw(); } } // Found an ordinary method. return InvokeDynamicFunction(reflectee, function, function_name, args, args_descriptor); } DEFINE_NATIVE_ENTRY(InstanceMirror_invokeGetter, 3) { // Argument 0 is the mirror, which is unused by the native. It exists // because this native is an instance method in order to be polymorphic // with its cousins. GET_NATIVE_ARGUMENT(Instance, reflectee, arguments->NativeArgAt(1)); GET_NON_NULL_NATIVE_ARGUMENT(String, getter_name, arguments->NativeArgAt(2)); Class& klass = Class::Handle(reflectee.clazz()); return InvokeInstanceGetter(klass, reflectee, getter_name, true); } DEFINE_NATIVE_ENTRY(InstanceMirror_invokeSetter, 4) { // Argument 0 is the mirror, which is unused by the native. It exists // because this native is an instance method in order to be polymorphic // with its cousins. GET_NATIVE_ARGUMENT(Instance, reflectee, arguments->NativeArgAt(1)); GET_NON_NULL_NATIVE_ARGUMENT(String, setter_name, arguments->NativeArgAt(2)); GET_NATIVE_ARGUMENT(Instance, value, arguments->NativeArgAt(3)); const Class& klass = Class::Handle(reflectee.clazz()); const String& internal_setter_name = String::Handle(Field::SetterName(setter_name)); const Function& setter = Function::Handle( Resolver::ResolveDynamicAnyArgs(klass, internal_setter_name)); const int kNumArgs = 2; const Array& args = Array::Handle(Array::New(kNumArgs)); args.SetAt(0, reflectee); args.SetAt(1, value); const Array& args_descriptor = Array::Handle(ArgumentsDescriptor::New(args.Length())); return InvokeDynamicFunction(reflectee, setter, internal_setter_name, args, args_descriptor); } DEFINE_NATIVE_ENTRY(InstanceMirror_computeType, 1) { GET_NON_NULL_NATIVE_ARGUMENT(Instance, instance, arguments->NativeArgAt(0)); const Type& type = Type::Handle(instance.GetType()); // The static type of null is specified to be the bottom type, however, the // runtime type of null is the Null type, which we correctly return here. return type.Canonicalize(); } DEFINE_NATIVE_ENTRY(ClosureMirror_apply, 2) { GET_NON_NULL_NATIVE_ARGUMENT(Array, args, arguments->NativeArgAt(0)); GET_NON_NULL_NATIVE_ARGUMENT(Array, arg_names, arguments->NativeArgAt(1)); const Array& args_descriptor = Array::Handle(ArgumentsDescriptor::New(args.Length(), arg_names)); const Object& result = Object::Handle(DartEntry::InvokeClosure(args, args_descriptor)); if (result.IsError()) { ThrowInvokeError(Error::Cast(result)); UNREACHABLE(); } return result.raw(); } DEFINE_NATIVE_ENTRY(ClosureMirror_find_in_context, 2) { if (!FLAG_support_find_in_context) { return Object::empty_array().raw(); } GET_NON_NULL_NATIVE_ARGUMENT(Instance, closure, arguments->NativeArgAt(0)); GET_NON_NULL_NATIVE_ARGUMENT(Array, lookup_parts, arguments->NativeArgAt(1)); ASSERT(lookup_parts.Length() >= 1 && lookup_parts.Length() <= 3); if (!closure.IsClosure()) { const Array& result_tuple = Array::Handle(Array::New(2)); result_tuple.SetAt(0, Bool::False()); return result_tuple.raw(); } Function& function = Function::Handle(); const bool callable = closure.IsCallable(&function, NULL); ASSERT(callable); const int parts_len = lookup_parts.Length(); // Lookup name is always the last part. const String& lookup_name = String::Handle(String::RawCast( lookup_parts.At(parts_len - 1))); String& part_name = String::Handle(); Class& owner = Class::Handle(function.Owner()); LibraryPrefix& prefix = LibraryPrefix::Handle(); Library& this_library = Library::Handle(owner.library()); Instance& result = Instance::Handle(Object::sentinel().raw()); if (parts_len == 1) { // Could be either a field in context, an instance or static field of the // enclosing class, or a field in the current library or any imported // library. result ^= LookupFunctionOrFieldInFunctionContext( function, Context::Handle(Closure::context(closure)), lookup_name); if (result.raw() == Object::sentinel().raw()) { result ^= LookupStaticFunctionOrFieldInClass(owner, lookup_name); } if (result.raw() == Object::sentinel().raw()) { result ^= LookupFunctionOrFieldInLibrary(this_library, part_name, lookup_name); } } else if (parts_len == 2) { // Could be either library.field or class.staticfield. part_name ^= lookup_parts.At(0); prefix ^= this_library.LookupLocalLibraryPrefix(part_name); if (prefix.IsNull()) { result ^= LookupFunctionOrFieldInLibrary(this_library, part_name, lookup_name); } else { result ^= LookupFunctionOrFieldInLibraryPrefix(prefix, lookup_name); } } else { ASSERT(parts_len == 3); // Can only be library.class.staticfield. part_name ^= lookup_parts.At(0); prefix ^= this_library.LookupLocalLibraryPrefix(part_name); if (!prefix.IsNull()) { part_name ^= lookup_parts.At(1); owner ^= prefix.LookupClass(part_name); if (!owner.IsNull()) { result ^= LookupStaticFunctionOrFieldInClass(owner, lookup_name); } } } // We return a tuple (list) where the first slot is a boolean indicates // whether we found a field or function and the second slot contains the // result. This is needed to distinguish between not finding a field and a // field containing null as value. const Array& result_tuple = Array::Handle(Array::New(2)); if (result.raw() == Object::sentinel().raw()) { result_tuple.SetAt(0, Bool::False()); // No need to set the value. } else { result_tuple.SetAt(0, Bool::True()); result_tuple.SetAt(1, result); } return result_tuple.raw(); } DEFINE_NATIVE_ENTRY(ClosureMirror_function, 1) { GET_NON_NULL_NATIVE_ARGUMENT(Instance, closure, arguments->NativeArgAt(0)); ASSERT(!closure.IsNull()); Function& function = Function::Handle(); bool callable = closure.IsCallable(&function, NULL); if (callable) { return CreateMethodMirror(function, Instance::null_instance()); } return Instance::null(); } DEFINE_NATIVE_ENTRY(ClassMirror_invoke, 5) { // Argument 0 is the mirror, which is unused by the native. It exists // because this native is an instance method in order to be polymorphic // with its cousins. GET_NON_NULL_NATIVE_ARGUMENT(MirrorReference, ref, arguments->NativeArgAt(1)); const Class& klass = Class::Handle(ref.GetClassReferent()); GET_NON_NULL_NATIVE_ARGUMENT( String, function_name, arguments->NativeArgAt(2)); GET_NON_NULL_NATIVE_ARGUMENT(Array, args, arguments->NativeArgAt(3)); GET_NON_NULL_NATIVE_ARGUMENT(Array, arg_names, arguments->NativeArgAt(4)); Function& function = Function::Handle( klass.LookupStaticFunction(function_name)); if (function.IsNull()) { // Didn't find a method: try to find a getter and invoke call on its result. const String& getter_name = String::Handle(Field::GetterName(function_name)); function = klass.LookupStaticFunction(getter_name); if (!function.IsNull()) { // Invoke the getter. const Object& getter_result = Object::Handle( DartEntry::InvokeFunction(function, Object::empty_array())); if (getter_result.IsError()) { ThrowInvokeError(Error::Cast(getter_result)); UNREACHABLE(); } // Make room for the closure (receiver) in the argument list. int numArgs = args.Length(); const Array& call_args = Array::Handle(Array::New(numArgs + 1)); Object& temp = Object::Handle(); for (int i = 0; i < numArgs; i++) { temp = args.At(i); call_args.SetAt(i + 1, temp); } call_args.SetAt(0, getter_result); const Array& call_args_descriptor_array = Array::Handle(ArgumentsDescriptor::New(call_args.Length(), arg_names)); // Call the closure. const Object& call_result = Object::Handle( DartEntry::InvokeClosure(call_args, call_args_descriptor_array)); if (call_result.IsError()) { ThrowInvokeError(Error::Cast(call_result)); UNREACHABLE(); } return call_result.raw(); } } const Array& args_descriptor_array = Array::Handle(ArgumentsDescriptor::New(args.Length(), arg_names)); ArgumentsDescriptor args_descriptor(args_descriptor_array); if (function.IsNull() || !function.AreValidArguments(args_descriptor, NULL) || !function.is_visible()) { ThrowNoSuchMethod(AbstractType::Handle(klass.RareType()), function_name, function, InvocationMirror::kStatic, InvocationMirror::kMethod); UNREACHABLE(); } Object& result = Object::Handle( DartEntry::InvokeFunction(function, args, args_descriptor_array)); if (result.IsError()) { ThrowInvokeError(Error::Cast(result)); UNREACHABLE(); } return result.raw(); } DEFINE_NATIVE_ENTRY(ClassMirror_invokeGetter, 3) { // Argument 0 is the mirror, which is unused by the native. It exists // because this native is an instance method in order to be polymorphic // with its cousins. GET_NON_NULL_NATIVE_ARGUMENT(MirrorReference, ref, arguments->NativeArgAt(1)); const Class& klass = Class::Handle(ref.GetClassReferent()); GET_NON_NULL_NATIVE_ARGUMENT(String, getter_name, arguments->NativeArgAt(2)); return InvokeClassGetter(klass, getter_name, true); } DEFINE_NATIVE_ENTRY(ClassMirror_invokeSetter, 4) { // Argument 0 is the mirror, which is unused by the native. It exists // because this native is an instance method in order to be polymorphic // with its cousins. GET_NON_NULL_NATIVE_ARGUMENT(MirrorReference, ref, arguments->NativeArgAt(1)); const Class& klass = Class::Handle(ref.GetClassReferent()); GET_NON_NULL_NATIVE_ARGUMENT(String, setter_name, arguments->NativeArgAt(2)); GET_NATIVE_ARGUMENT(Instance, value, arguments->NativeArgAt(3)); // Check for real fields and user-defined setters. const Field& field = Field::Handle(klass.LookupStaticField(setter_name)); Function& setter = Function::Handle(); if (field.IsNull()) { const String& internal_setter_name = String::Handle( Field::SetterName(setter_name)); setter = klass.LookupStaticFunction(internal_setter_name); if (setter.IsNull() || !setter.is_visible()) { ThrowNoSuchMethod(AbstractType::Handle(klass.RareType()), setter_name, setter, InvocationMirror::kStatic, InvocationMirror::kSetter); UNREACHABLE(); } // Invoke the setter and return the result. const int kNumArgs = 1; const Array& args = Array::Handle(Array::New(kNumArgs)); args.SetAt(0, value); Object& result = Object::Handle( DartEntry::InvokeFunction(setter, args)); if (result.IsError()) { ThrowInvokeError(Error::Cast(result)); UNREACHABLE(); } return result.raw(); } if (field.is_final()) { ThrowNoSuchMethod(AbstractType::Handle(klass.RareType()), setter_name, setter, InvocationMirror::kStatic, InvocationMirror::kSetter); UNREACHABLE(); } field.set_value(value); return value.raw(); } DEFINE_NATIVE_ENTRY(ClassMirror_invokeConstructor, 5) { GET_NON_NULL_NATIVE_ARGUMENT(MirrorReference, ref, arguments->NativeArgAt(0)); const Class& klass = Class::Handle(ref.GetClassReferent()); GET_NATIVE_ARGUMENT(Type, type, arguments->NativeArgAt(1)); GET_NON_NULL_NATIVE_ARGUMENT( String, constructor_name, arguments->NativeArgAt(2)); GET_NON_NULL_NATIVE_ARGUMENT(Array, explicit_args, arguments->NativeArgAt(3)); GET_NON_NULL_NATIVE_ARGUMENT(Array, arg_names, arguments->NativeArgAt(4)); // By convention, the static function implementing a named constructor 'C' // for class 'A' is labeled 'A.C', and the static function implementing the // unnamed constructor for class 'A' is labeled 'A.'. // This convention prevents users from explicitly calling constructors. const String& klass_name = String::Handle(klass.Name()); String& internal_constructor_name = String::Handle(String::Concat(klass_name, Symbols::Dot())); if (!constructor_name.IsNull()) { internal_constructor_name = String::Concat(internal_constructor_name, constructor_name); } Function& lookup_constructor = Function::Handle( klass.LookupFunction(internal_constructor_name)); if (lookup_constructor.IsNull() || !(lookup_constructor.IsConstructor() || lookup_constructor.IsFactory()) || !lookup_constructor.is_visible()) { // Pretend we didn't find the constructor at all when the arity is wrong // so as to produce the same NoSuchMethodError as the non-reflective case. lookup_constructor = Function::null(); ThrowNoSuchMethod(AbstractType::Handle(klass.RareType()), internal_constructor_name, lookup_constructor, InvocationMirror::kConstructor, InvocationMirror::kMethod); UNREACHABLE(); } if (klass.is_abstract() && !lookup_constructor.IsFactory()) { const Array& error_args = Array::Handle(Array::New(3)); error_args.SetAt(0, klass_name); // 1 = script url // 2 = token position Exceptions::ThrowByType(Exceptions::kAbstractClassInstantiation, error_args); UNREACHABLE(); } ASSERT(!type.IsNull()); AbstractTypeArguments& type_arguments = AbstractTypeArguments::Handle(type.arguments()); if (!type.IsInstantiated()) { // Must have been a declaration type. AbstractType& rare_type = AbstractType::Handle(klass.RareType()); ASSERT(rare_type.IsInstantiated()); type_arguments = rare_type.arguments(); } Class& redirected_klass = Class::Handle(klass.raw()); Function& redirected_constructor = Function::Handle(lookup_constructor.raw()); if (lookup_constructor.IsRedirectingFactory()) { ClassFinalizer::ResolveRedirectingFactory(klass, lookup_constructor); Type& redirect_type = Type::Handle(lookup_constructor.RedirectionType()); if (!redirect_type.IsInstantiated()) { // The type arguments of the redirection type are instantiated from the // type arguments of the type reflected by the class mirror. Error& bound_error = Error::Handle(); redirect_type ^= redirect_type.InstantiateFrom(type_arguments, &bound_error); if (!bound_error.IsNull()) { ThrowInvokeError(bound_error); UNREACHABLE(); } } type = redirect_type.raw(); type_arguments = redirect_type.arguments(); redirected_constructor = lookup_constructor.RedirectionTarget(); ASSERT(!redirected_constructor.IsNull()); redirected_klass = type.type_class(); } const intptr_t num_explicit_args = explicit_args.Length(); const intptr_t num_implicit_args = redirected_constructor.IsConstructor() ? 2 : 1; const Array& args = Array::Handle(Array::New(num_implicit_args + num_explicit_args)); // Copy over the explicit arguments. Object& explicit_argument = Object::Handle(); for (int i = 0; i < num_explicit_args; i++) { explicit_argument = explicit_args.At(i); args.SetAt(i + num_implicit_args, explicit_argument); } const Array& args_descriptor_array = Array::Handle(ArgumentsDescriptor::New(args.Length(), arg_names)); ArgumentsDescriptor args_descriptor(args_descriptor_array); if (!redirected_constructor.AreValidArguments(args_descriptor, NULL) || !redirected_constructor.is_visible()) { // Pretend we didn't find the constructor at all when the arity is wrong // so as to produce the same NoSuchMethodError as the non-reflective case. redirected_constructor = Function::null(); ThrowNoSuchMethod(AbstractType::Handle(klass.RareType()), internal_constructor_name, redirected_constructor, InvocationMirror::kConstructor, InvocationMirror::kMethod); UNREACHABLE(); } Instance& new_object = Instance::Handle(); if (redirected_constructor.IsConstructor()) { // Constructors get the uninitialized object and a constructor phase. Note // we have delayed allocation until after the function type and argument // matching checks. new_object = Instance::New(redirected_klass); if (!type_arguments.IsNull()) { // The type arguments will be null if the class has no type parameters, in // which case the following call would fail because there is no slot // reserved in the object for the type vector. new_object.SetTypeArguments(type_arguments); } args.SetAt(0, new_object); args.SetAt(1, Smi::Handle(Smi::New(Function::kCtorPhaseAll))); } else { // Factories get type arguments. args.SetAt(0, type_arguments); } // Invoke the constructor and return the new object. const Object& result = Object::Handle(DartEntry::InvokeFunction(redirected_constructor, args, args_descriptor_array)); if (result.IsError()) { ThrowInvokeError(Error::Cast(result)); UNREACHABLE(); } // Factories may return null. ASSERT(result.IsInstance() || result.IsNull()); if (redirected_constructor.IsConstructor()) { return new_object.raw(); } else { return result.raw(); } } DEFINE_NATIVE_ENTRY(LibraryMirror_invoke, 5) { // Argument 0 is the mirror, which is unused by the native. It exists // because this native is an instance method in order to be polymorphic // with its cousins. GET_NON_NULL_NATIVE_ARGUMENT(MirrorReference, ref, arguments->NativeArgAt(1)); const Library& library = Library::Handle(ref.GetLibraryReferent()); GET_NON_NULL_NATIVE_ARGUMENT( String, function_name, arguments->NativeArgAt(2)); GET_NON_NULL_NATIVE_ARGUMENT(Array, args, arguments->NativeArgAt(3)); GET_NON_NULL_NATIVE_ARGUMENT(Array, arg_names, arguments->NativeArgAt(4)); Function& function = Function::Handle( library.LookupLocalFunction(function_name)); if (function.IsNull()) { // Didn't find a method: try to find a getter and invoke call on its result. const String& getter_name = String::Handle(Field::GetterName(function_name)); function = library.LookupLocalFunction(getter_name); if (!function.IsNull()) { // Invoke getter. const Object& getter_result = Object::Handle( DartEntry::InvokeFunction(function, Object::empty_array())); if (getter_result.IsError()) { ThrowInvokeError(Error::Cast(getter_result)); UNREACHABLE(); } // Make room for the closure (receiver) in arguments. int numArgs = args.Length(); const Array& call_args = Array::Handle(Array::New(numArgs + 1)); Object& temp = Object::Handle(); for (int i = 0; i < numArgs; i++) { temp = args.At(i); call_args.SetAt(i + 1, temp); } call_args.SetAt(0, getter_result); const Array& call_args_descriptor_array = Array::Handle(ArgumentsDescriptor::New(call_args.Length(), arg_names)); // Call closure. const Object& call_result = Object::Handle( DartEntry::InvokeClosure(call_args, call_args_descriptor_array)); if (call_result.IsError()) { ThrowInvokeError(Error::Cast(call_result)); UNREACHABLE(); } return call_result.raw(); } } const Array& args_descriptor_array = Array::Handle(ArgumentsDescriptor::New(args.Length(), arg_names)); ArgumentsDescriptor args_descriptor(args_descriptor_array); if (function.IsNull() || !function.AreValidArguments(args_descriptor, NULL) || !function.is_visible()) { ThrowNoSuchMethod(Instance::null_instance(), function_name, function, InvocationMirror::kTopLevel, InvocationMirror::kMethod); UNREACHABLE(); } const Object& result = Object::Handle( DartEntry::InvokeFunction(function, args, args_descriptor_array)); if (result.IsError()) { ThrowInvokeError(Error::Cast(result)); UNREACHABLE(); } return result.raw(); } DEFINE_NATIVE_ENTRY(LibraryMirror_invokeGetter, 3) { // Argument 0 is the mirror, which is unused by the native. It exists // because this native is an instance method in order to be polymorphic // with its cousins. GET_NON_NULL_NATIVE_ARGUMENT(MirrorReference, ref, arguments->NativeArgAt(1)); const Library& library = Library::Handle(ref.GetLibraryReferent()); GET_NON_NULL_NATIVE_ARGUMENT(String, getter_name, arguments->NativeArgAt(2)); return InvokeLibraryGetter(library, getter_name, true); } DEFINE_NATIVE_ENTRY(LibraryMirror_invokeSetter, 4) { // Argument 0 is the mirror, which is unused by the native. It exists // because this native is an instance method in order to be polymorphic // with its cousins. GET_NON_NULL_NATIVE_ARGUMENT(MirrorReference, ref, arguments->NativeArgAt(1)); const Library& library = Library::Handle(ref.GetLibraryReferent()); GET_NON_NULL_NATIVE_ARGUMENT(String, setter_name, arguments->NativeArgAt(2)); GET_NATIVE_ARGUMENT(Instance, value, arguments->NativeArgAt(3)); // To access a top-level we may need to use the Field or the // setter Function. The setter function may either be in the // library or in the field's owner class, depending. const Field& field = Field::Handle( library.LookupLocalField(setter_name)); Function& setter = Function::Handle(); if (field.IsNull()) { const String& internal_setter_name = String::Handle(Field::SetterName(setter_name)); setter = library.LookupLocalFunction(internal_setter_name); if (setter.IsNull() || !setter.is_visible()) { ThrowNoSuchMethod(Instance::null_instance(), setter_name, setter, InvocationMirror::kTopLevel, InvocationMirror::kSetter); UNREACHABLE(); } // Invoke the setter and return the result. const int kNumArgs = 1; const Array& args = Array::Handle(Array::New(kNumArgs)); args.SetAt(0, value); const Object& result = Object::Handle( DartEntry::InvokeFunction(setter, args)); if (result.IsError()) { ThrowInvokeError(Error::Cast(result)); UNREACHABLE(); } return result.raw(); } if (field.is_final()) { ThrowNoSuchMethod(Instance::null_instance(), setter_name, setter, InvocationMirror::kTopLevel, InvocationMirror::kSetter); UNREACHABLE(); } field.set_value(value); return value.raw(); } DEFINE_NATIVE_ENTRY(MethodMirror_owner, 1) { GET_NON_NULL_NATIVE_ARGUMENT(MirrorReference, ref, arguments->NativeArgAt(0)); const Function& func = Function::Handle(ref.GetFunctionReferent()); if (func.IsNonImplicitClosureFunction()) { return CreateMethodMirror(Function::Handle( func.parent_function()), Object::null_instance()); } const Class& owner = Class::Handle(func.Owner()); if (owner.IsTopLevel()) { return CreateLibraryMirror(Library::Handle(owner.library())); } AbstractType& type = AbstractType::Handle(owner.DeclarationType()); return CreateClassMirror(owner, type, Bool::True(), Object::null_instance()); } DEFINE_NATIVE_ENTRY(MethodMirror_parameters, 2) { GET_NON_NULL_NATIVE_ARGUMENT(Instance, owner, arguments->NativeArgAt(0)); GET_NON_NULL_NATIVE_ARGUMENT(MirrorReference, ref, arguments->NativeArgAt(1)); const Function& func = Function::Handle(ref.GetFunctionReferent()); return CreateParameterMirrorList(func, owner); } DEFINE_NATIVE_ENTRY(MethodMirror_return_type, 2) { GET_NON_NULL_NATIVE_ARGUMENT(MirrorReference, ref, arguments->NativeArgAt(0)); const Function& func = Function::Handle(ref.GetFunctionReferent()); GET_NATIVE_ARGUMENT(AbstractType, instantiator, arguments->NativeArgAt(1)); // We handle constructors in Dart code. ASSERT(!func.IsConstructor()); const AbstractType& type = AbstractType::Handle(func.result_type()); return InstantiateType(type, instantiator); } DEFINE_NATIVE_ENTRY(MethodMirror_source, 1) { GET_NON_NULL_NATIVE_ARGUMENT(MirrorReference, ref, arguments->NativeArgAt(0)); const Function& func = Function::Handle(ref.GetFunctionReferent()); const Script& script = Script::Handle(func.script()); const TokenStream& stream = TokenStream::Handle(script.tokens()); const TokenStream::Iterator tkit(stream, func.end_token_pos()); intptr_t from_line; intptr_t from_col; intptr_t to_line; intptr_t to_col; script.GetTokenLocation(func.token_pos(), &from_line, &from_col); script.GetTokenLocation(func.end_token_pos(), &to_line, &to_col); intptr_t last_tok_len = String::Handle(tkit.CurrentLiteral()).Length(); // Handle special cases for end tokens of closures (where we exclude the last // token): // (1) "foo(() => null, bar);": End token is `,', but we don't print it. // (2) "foo(() => null);": End token is ')`, but we don't print it. // (3) "var foo = () => null;": End token is `;', but in this case the token // semicolon belongs to the assignment so we skip it. if ((tkit.CurrentTokenKind() == Token::kCOMMA) || // Case 1. (tkit.CurrentTokenKind() == Token::kRPAREN) || // Case 2. (tkit.CurrentTokenKind() == Token::kSEMICOLON && String::Handle(func.name()).Equals(""))) { // Case 3. last_tok_len = 0; } return script.GetSnippet(from_line, from_col, to_line, to_col + last_tok_len); } DEFINE_NATIVE_ENTRY(TypedefMirror_referent, 1) { GET_NON_NULL_NATIVE_ARGUMENT(Type, type, arguments->NativeArgAt(0)); const Class& cls = Class::Handle(type.type_class()); const Function& sig_func = Function::Handle(cls.signature_function()); const Class& sig_cls = Class::Handle(sig_func.signature_class()); AbstractType& referent_type = AbstractType::Handle(sig_cls.DeclarationType()); referent_type = InstantiateType(referent_type, type); return CreateFunctionTypeMirror(sig_cls, referent_type); } DEFINE_NATIVE_ENTRY(ParameterMirror_type, 3) { GET_NON_NULL_NATIVE_ARGUMENT(MirrorReference, ref, arguments->NativeArgAt(0)); GET_NON_NULL_NATIVE_ARGUMENT(Smi, pos, arguments->NativeArgAt(1)); GET_NATIVE_ARGUMENT(AbstractType, instantiator, arguments->NativeArgAt(2)); const Function& func = Function::Handle(ref.GetFunctionReferent()); const AbstractType& type = AbstractType::Handle( func.ParameterTypeAt(func.NumImplicitParameters() + pos.Value())); return InstantiateType(type, instantiator); } DEFINE_NATIVE_ENTRY(VariableMirror_type, 2) { GET_NON_NULL_NATIVE_ARGUMENT(MirrorReference, ref, arguments->NativeArgAt(0)); const Field& field = Field::Handle(ref.GetFieldReferent()); GET_NATIVE_ARGUMENT(AbstractType, instantiator, arguments->NativeArgAt(1)); const AbstractType& type = AbstractType::Handle(field.type()); return InstantiateType(type, instantiator); } } // namespace dart