| // Copyright (c) 2016, 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. |
| |
| library fasta.source_loader; |
| |
| import 'dart:async' show Future; |
| |
| import 'dart:convert' show utf8; |
| |
| import 'dart:typed_data' show Uint8List; |
| |
| import 'package:kernel/ast.dart' |
| show |
| Arguments, |
| BottomType, |
| Class, |
| Component, |
| DartType, |
| Expression, |
| FunctionNode, |
| InterfaceType, |
| Library, |
| LibraryDependency, |
| ProcedureKind, |
| Supertype; |
| |
| import 'package:kernel/class_hierarchy.dart' |
| show ClassHierarchy, HandleAmbiguousSupertypes; |
| |
| import 'package:kernel/core_types.dart' show CoreTypes; |
| |
| import 'package:kernel/type_environment.dart' show TypeEnvironment; |
| |
| import '../../api_prototype/file_system.dart'; |
| |
| import '../../base/instrumentation.dart' |
| show Instrumentation, InstrumentationValueLiteral; |
| |
| import '../builder/builder.dart' |
| show |
| ClassBuilder, |
| Declaration, |
| EnumBuilder, |
| FieldBuilder, |
| LibraryBuilder, |
| NamedTypeBuilder, |
| TypeBuilder; |
| |
| import '../export.dart' show Export; |
| |
| import '../import.dart' show Import; |
| |
| import '../fasta_codes.dart' |
| show |
| LocatedMessage, |
| Message, |
| SummaryTemplate, |
| Template, |
| messagePartOrphan, |
| noLength, |
| templateAmbiguousSupertypes, |
| templateCantReadFile, |
| templateCyclicClassHierarchy, |
| templateDuplicatedLibraryExport, |
| templateDuplicatedLibraryExportContext, |
| templateDuplicatedLibraryImport, |
| templateDuplicatedLibraryImportContext, |
| templateExtendingEnum, |
| templateExtendingRestricted, |
| templateIllegalMixin, |
| templateIllegalMixinDueToConstructors, |
| templateIllegalMixinDueToConstructorsCause, |
| templateInternalProblemUriMissingScheme, |
| templateSourceOutlineSummary, |
| templateUntranslatableUri; |
| |
| import '../fasta_codes.dart' as fasta_codes; |
| |
| import '../kernel/kernel_shadow_ast.dart' |
| show ShadowClass, ShadowTypeInferenceEngine; |
| |
| import '../kernel/kernel_builder.dart' show KernelProcedureBuilder; |
| |
| import '../kernel/kernel_target.dart' show KernelTarget; |
| |
| import '../kernel/body_builder.dart' show BodyBuilder; |
| |
| import '../loader.dart' show Loader, untranslatableUriScheme; |
| |
| import '../parser/class_member_parser.dart' show ClassMemberParser; |
| |
| import '../parser.dart' show Parser, lengthForToken, offsetForToken; |
| |
| import '../problems.dart' show internalProblem, unexpected, unhandled; |
| |
| import '../scanner.dart' show ErrorToken, ScannerResult, Token, scan; |
| |
| import '../severity.dart' show Severity; |
| |
| import '../type_inference/interface_resolver.dart' show InterfaceResolver; |
| |
| import '../type_inference/type_inference_engine.dart' show TypeInferenceEngine; |
| |
| import '../type_inference/type_inferrer.dart' |
| show LegacyModeMixinInferrer, StrongModeMixinInferrer; |
| |
| import 'diet_listener.dart' show DietListener; |
| |
| import 'diet_parser.dart' show DietParser; |
| |
| import 'outline_builder.dart' show OutlineBuilder; |
| |
| import 'source_class_builder.dart' show SourceClassBuilder; |
| |
| import 'source_library_builder.dart' show SourceLibraryBuilder; |
| |
| class SourceLoader<L> extends Loader<L> { |
| /// The [FileSystem] which should be used to access files. |
| final FileSystem fileSystem; |
| |
| /// Whether comments should be scanned and parsed. |
| final bool includeComments; |
| |
| final Map<Uri, List<int>> sourceBytes = <Uri, List<int>>{}; |
| |
| // Used when building directly to kernel. |
| ClassHierarchy hierarchy; |
| CoreTypes coreTypes; |
| // Used when checking whether a return type of an async function is valid. |
| DartType futureOfBottom; |
| DartType iterableOfBottom; |
| DartType streamOfBottom; |
| |
| @override |
| TypeInferenceEngine typeInferenceEngine; |
| |
| InterfaceResolver interfaceResolver; |
| |
| Instrumentation instrumentation; |
| |
| List<ClassBuilder> orderedClasses; |
| |
| SourceLoader(this.fileSystem, this.includeComments, KernelTarget target) |
| : super(target); |
| |
| Template<SummaryTemplate> get outlineSummaryTemplate => |
| templateSourceOutlineSummary; |
| |
| bool get isSourceLoader => true; |
| |
| Future<Token> tokenize(SourceLibraryBuilder library, |
| {bool suppressLexicalErrors: false}) async { |
| Uri uri = library.fileUri; |
| |
| // Lookup the file URI in the cache. |
| List<int> bytes = sourceBytes[uri]; |
| |
| if (bytes == null) { |
| // Error recovery. |
| if (uri.scheme == untranslatableUriScheme) { |
| Message message = templateUntranslatableUri.withArguments(library.uri); |
| library.addProblemAtAccessors(message); |
| bytes = synthesizeSourceForMissingFile(library.uri, null); |
| } else if (!uri.hasScheme) { |
| return internalProblem( |
| templateInternalProblemUriMissingScheme.withArguments(uri), |
| -1, |
| library.uri); |
| } else if (uri.scheme == SourceLibraryBuilder.MALFORMED_URI_SCHEME) { |
| bytes = synthesizeSourceForMissingFile(library.uri, null); |
| } |
| if (bytes != null) { |
| Uint8List zeroTerminatedBytes = new Uint8List(bytes.length + 1); |
| zeroTerminatedBytes.setRange(0, bytes.length, bytes); |
| bytes = zeroTerminatedBytes; |
| sourceBytes[uri] = bytes; |
| } |
| } |
| |
| if (bytes == null) { |
| // If it isn't found in the cache, read the file read from the file |
| // system. |
| List<int> rawBytes; |
| try { |
| rawBytes = await fileSystem.entityForUri(uri).readAsBytes(); |
| } on FileSystemException catch (e) { |
| Message message = templateCantReadFile.withArguments(uri, e.message); |
| library.addProblemAtAccessors(message); |
| rawBytes = synthesizeSourceForMissingFile(library.uri, message); |
| } |
| Uint8List zeroTerminatedBytes = new Uint8List(rawBytes.length + 1); |
| zeroTerminatedBytes.setRange(0, rawBytes.length, rawBytes); |
| bytes = zeroTerminatedBytes; |
| sourceBytes[uri] = bytes; |
| byteCount += rawBytes.length; |
| } |
| |
| ScannerResult result = scan(bytes, includeComments: includeComments); |
| Token token = result.tokens; |
| if (!suppressLexicalErrors) { |
| List<int> source = getSource(bytes); |
| target.addSourceInformation(library.fileUri, result.lineStarts, source); |
| } |
| while (token is ErrorToken) { |
| if (!suppressLexicalErrors) { |
| ErrorToken error = token; |
| library.addProblem(error.assertionMessage, offsetForToken(token), |
| lengthForToken(token), uri); |
| } |
| token = token.next; |
| } |
| return token; |
| } |
| |
| List<int> synthesizeSourceForMissingFile(Uri uri, Message message) { |
| switch ("$uri") { |
| case "dart:core": |
| return utf8.encode(defaultDartCoreSource); |
| |
| case "dart:async": |
| return utf8.encode(defaultDartAsyncSource); |
| |
| default: |
| return utf8.encode(message == null ? "" : "/* ${message.message} */"); |
| } |
| } |
| |
| List<int> getSource(List<int> bytes) { |
| // bytes is 0-terminated. We don't want that included. |
| if (bytes is Uint8List) { |
| return new Uint8List.view( |
| bytes.buffer, bytes.offsetInBytes, bytes.length - 1); |
| } |
| return bytes.sublist(0, bytes.length - 1); |
| } |
| |
| Future<Null> buildOutline(SourceLibraryBuilder library) async { |
| Token tokens = await tokenize(library); |
| if (tokens == null) return; |
| OutlineBuilder listener = new OutlineBuilder(library); |
| new ClassMemberParser(listener).parseUnit(tokens); |
| } |
| |
| Future<Null> buildBody(LibraryBuilder library) async { |
| if (library is SourceLibraryBuilder) { |
| // We tokenize source files twice to keep memory usage low. This is the |
| // second time, and the first time was in [buildOutline] above. So this |
| // time we suppress lexical errors. |
| Token tokens = await tokenize(library, suppressLexicalErrors: true); |
| if (tokens == null) return; |
| DietListener listener = createDietListener(library); |
| DietParser parser = new DietParser(listener); |
| parser.parseUnit(tokens); |
| for (SourceLibraryBuilder part in library.parts) { |
| if (part.partOfLibrary != library) { |
| // Part was included in multiple libraries. Skip it here. |
| continue; |
| } |
| Token tokens = await tokenize(part); |
| if (tokens != null) { |
| listener.uri = part.fileUri; |
| listener.partDirectiveIndex = 0; |
| parser.parseUnit(tokens); |
| } |
| } |
| } |
| } |
| |
| Future<Expression> buildExpression( |
| SourceLibraryBuilder library, |
| String enclosingClass, |
| bool isInstanceMember, |
| FunctionNode parameters) async { |
| Token token = await tokenize(library, suppressLexicalErrors: false); |
| if (token == null) return null; |
| DietListener dietListener = createDietListener(library); |
| |
| Declaration parent = library; |
| if (enclosingClass != null) { |
| Declaration cls = |
| dietListener.memberScope.lookup(enclosingClass, -1, null); |
| if (cls is ClassBuilder) { |
| parent = cls; |
| dietListener |
| ..currentClass = cls |
| ..memberScope = cls.scope.copyWithParent( |
| dietListener.memberScope.withTypeVariables(cls.typeVariables), |
| "debugExpression in $enclosingClass"); |
| } |
| } |
| KernelProcedureBuilder builder = new KernelProcedureBuilder(null, 0, null, |
| "debugExpr", null, null, ProcedureKind.Method, library, 0, 0, -1, -1) |
| ..parent = parent; |
| BodyBuilder listener = dietListener.createListener( |
| builder, dietListener.memberScope, isInstanceMember); |
| |
| return listener.parseSingleExpression( |
| new Parser(listener), token, parameters); |
| } |
| |
| KernelTarget get target => super.target; |
| |
| DietListener createDietListener(SourceLibraryBuilder library) { |
| return new DietListener(library, hierarchy, coreTypes, typeInferenceEngine); |
| } |
| |
| void resolveParts() { |
| List<Uri> parts = <Uri>[]; |
| List<SourceLibraryBuilder> libraries = <SourceLibraryBuilder>[]; |
| builders.forEach((Uri uri, LibraryBuilder library) { |
| if (library.loader == this) { |
| if (library.isPart) { |
| parts.add(uri); |
| } else { |
| libraries.add(library); |
| } |
| } |
| }); |
| Set<Uri> usedParts = new Set<Uri>(); |
| for (SourceLibraryBuilder library in libraries) { |
| library.includeParts(usedParts); |
| } |
| for (Uri uri in parts) { |
| if (usedParts.contains(uri)) { |
| builders.remove(uri); |
| } else { |
| SourceLibraryBuilder part = builders[uri]; |
| part.addProblem(messagePartOrphan, 0, 1, part.fileUri); |
| part.validatePart(null, null); |
| } |
| } |
| ticker.logMs("Resolved parts"); |
| |
| builders.forEach((Uri uri, LibraryBuilder library) { |
| if (library.loader == this) { |
| library.applyPatches(); |
| } |
| }); |
| ticker.logMs("Applied patches"); |
| } |
| |
| void computeLibraryScopes() { |
| Set<LibraryBuilder> exporters = new Set<LibraryBuilder>(); |
| Set<LibraryBuilder> exportees = new Set<LibraryBuilder>(); |
| builders.forEach((Uri uri, LibraryBuilder library) { |
| if (library.loader == this) { |
| SourceLibraryBuilder sourceLibrary = library; |
| sourceLibrary.buildInitialScopes(); |
| } |
| if (library.exporters.isNotEmpty) { |
| exportees.add(library); |
| for (Export exporter in library.exporters) { |
| exporters.add(exporter.exporter); |
| } |
| } |
| }); |
| Set<SourceLibraryBuilder> both = new Set<SourceLibraryBuilder>(); |
| for (LibraryBuilder exported in exportees) { |
| if (exporters.contains(exported)) { |
| both.add(exported); |
| } |
| for (Export export in exported.exporters) { |
| exported.exportScope.forEach(export.addToExportScope); |
| } |
| } |
| bool wasChanged = false; |
| do { |
| wasChanged = false; |
| for (SourceLibraryBuilder exported in both) { |
| for (Export export in exported.exporters) { |
| exported.exportScope.forEach((String name, Declaration member) { |
| if (export.addToExportScope(name, member)) { |
| wasChanged = true; |
| } |
| }); |
| } |
| } |
| } while (wasChanged); |
| builders.forEach((Uri uri, LibraryBuilder library) { |
| if (library.loader == this) { |
| SourceLibraryBuilder sourceLibrary = library; |
| sourceLibrary.addImportsToScope(); |
| } |
| }); |
| for (LibraryBuilder exportee in exportees) { |
| // TODO(ahe): Change how we track exporters. Currently, when a library |
| // (exporter) exports another library (exportee) we add a reference to |
| // exporter to exportee. This creates a reference in the wrong direction |
| // and can lead to memory leaks. |
| exportee.exporters.clear(); |
| } |
| ticker.logMs("Computed library scopes"); |
| // debugPrintExports(); |
| } |
| |
| void debugPrintExports() { |
| // TODO(sigmund): should be `covarint SourceLibraryBuilder`. |
| builders.forEach((Uri uri, dynamic l) { |
| SourceLibraryBuilder library = l; |
| Set<Declaration> members = new Set<Declaration>(); |
| library.forEach((String name, Declaration member) { |
| while (member != null) { |
| members.add(member); |
| member = member.next; |
| } |
| }); |
| List<String> exports = <String>[]; |
| library.exportScope.forEach((String name, Declaration member) { |
| while (member != null) { |
| if (!members.contains(member)) { |
| exports.add(name); |
| } |
| member = member.next; |
| } |
| }); |
| if (exports.isNotEmpty) { |
| print("$uri exports $exports"); |
| } |
| }); |
| } |
| |
| void resolveTypes() { |
| int typeCount = 0; |
| builders.forEach((Uri uri, LibraryBuilder library) { |
| if (library.loader == this) { |
| SourceLibraryBuilder sourceLibrary = library; |
| typeCount += sourceLibrary.resolveTypes(); |
| } |
| }); |
| ticker.logMs("Resolved $typeCount types"); |
| } |
| |
| void finishDeferredLoadTearoffs() { |
| int count = 0; |
| builders.forEach((Uri uri, LibraryBuilder library) { |
| if (library.loader == this) { |
| count += library.finishDeferredLoadTearoffs(); |
| } |
| }); |
| ticker.logMs("Finished deferred load tearoffs $count"); |
| } |
| |
| void finishNoSuchMethodForwarders() { |
| int count = 0; |
| builders.forEach((Uri uri, LibraryBuilder library) { |
| if (library.loader == this) { |
| count += library.finishForwarders(); |
| } |
| }); |
| ticker.logMs("Finished forwarders for $count procedures"); |
| } |
| |
| void resolveConstructors() { |
| int count = 0; |
| builders.forEach((Uri uri, LibraryBuilder library) { |
| if (library.loader == this) { |
| count += library.resolveConstructors(null); |
| } |
| }); |
| ticker.logMs("Resolved $count constructors"); |
| } |
| |
| void finishTypeVariables(ClassBuilder object, TypeBuilder dynamicType) { |
| int count = 0; |
| builders.forEach((Uri uri, LibraryBuilder library) { |
| if (library.loader == this) { |
| count += library.finishTypeVariables(object, dynamicType); |
| } |
| }); |
| ticker.logMs("Resolved $count type-variable bounds"); |
| } |
| |
| void computeDefaultTypes(TypeBuilder dynamicType, TypeBuilder bottomType, |
| ClassBuilder objectClass) { |
| int count = 0; |
| builders.forEach((Uri uri, LibraryBuilder library) { |
| if (library.loader == this) { |
| count += |
| library.computeDefaultTypes(dynamicType, bottomType, objectClass); |
| } |
| }); |
| ticker.logMs("Computed default types for $count type variables"); |
| } |
| |
| void finishNativeMethods() { |
| int count = 0; |
| builders.forEach((Uri uri, LibraryBuilder library) { |
| if (library.loader == this) { |
| count += library.finishNativeMethods(); |
| } |
| }); |
| ticker.logMs("Finished $count native methods"); |
| } |
| |
| void finishPatchMethods() { |
| int count = 0; |
| builders.forEach((Uri uri, LibraryBuilder library) { |
| if (library.loader == this) { |
| count += library.finishPatchMethods(); |
| } |
| }); |
| ticker.logMs("Finished $count patch methods"); |
| } |
| |
| /// Returns all the supertypes (including interfaces) of [cls] |
| /// transitively. Includes [cls]. |
| Set<ClassBuilder> allSupertypes(ClassBuilder cls) { |
| int length = 0; |
| Set<ClassBuilder> result = new Set<ClassBuilder>()..add(cls); |
| while (length != result.length) { |
| length = result.length; |
| result.addAll(directSupertypes(result)); |
| } |
| return result; |
| } |
| |
| /// Returns the direct supertypes (including interface) of [classes]. A class |
| /// from [classes] is only included if it is a supertype of one of the other |
| /// classes in [classes]. |
| Set<ClassBuilder> directSupertypes(Iterable<ClassBuilder> classes) { |
| Set<ClassBuilder> result = new Set<ClassBuilder>(); |
| for (ClassBuilder cls in classes) { |
| target.addDirectSupertype(cls, result); |
| } |
| return result; |
| } |
| |
| /// Computes a set of classes that may have cycles. The set is empty if there |
| /// are no cycles. If the set isn't empty, it will include supertypes of |
| /// classes with cycles, as well as the classes with cycles. |
| /// |
| /// It is assumed that [classes] is a transitive closure with respect to |
| /// supertypes. |
| Iterable<ClassBuilder> cyclicCandidates(Iterable<ClassBuilder> classes) { |
| // The candidates are found by a fixed-point computation. |
| // |
| // On each iteration, the classes that have no supertypes in the input set |
| // will be removed. |
| // |
| // If there are no cycles, eventually, the set will converge on Object, and |
| // the next iteration will make the set empty (as Object has no |
| // supertypes). |
| // |
| // On the other hand, if there is a cycle, the cycle will remain in the |
| // set, and so will its supertypes, and eventually the input and output set |
| // will have the same length. |
| Iterable<ClassBuilder> input = const []; |
| Iterable<ClassBuilder> output = classes; |
| while (input.length != output.length) { |
| input = output; |
| output = directSupertypes(input); |
| } |
| return output; |
| } |
| |
| void checkSemantics(List<SourceClassBuilder> classes) { |
| Iterable<ClassBuilder> candidates = cyclicCandidates(classes); |
| if (candidates.isNotEmpty) { |
| Map<ClassBuilder, Set<ClassBuilder>> realCycles = |
| <ClassBuilder, Set<ClassBuilder>>{}; |
| for (ClassBuilder cls in candidates) { |
| Set<ClassBuilder> cycles = cyclicCandidates(allSupertypes(cls)); |
| if (cycles.isNotEmpty) { |
| realCycles[cls] = cycles; |
| } |
| } |
| Map<LocatedMessage, ClassBuilder> messages = |
| <LocatedMessage, ClassBuilder>{}; |
| realCycles.forEach((ClassBuilder cls, Set<ClassBuilder> cycles) { |
| target.breakCycle(cls); |
| List<ClassBuilder> involved = <ClassBuilder>[]; |
| for (ClassBuilder cls in cycles) { |
| if (realCycles.containsKey(cls)) { |
| involved.add(cls); |
| } |
| } |
| // Sort the class names alphabetically to ensure the order is stable. |
| // TODO(ahe): It's possible that a better UX would be to sort the |
| // classes based on walking the class hierarchy in breadth-first order. |
| String involvedString = (involved |
| .where((c) => c != cls) |
| .map((c) => c.fullNameForErrors) |
| .toList() |
| ..sort()) |
| .join("', '"); |
| messages[templateCyclicClassHierarchy |
| .withArguments(cls.fullNameForErrors, involvedString) |
| .withLocation(cls.fileUri, cls.charOffset, noLength)] = cls; |
| }); |
| |
| // Report all classes involved in a cycle, sorted to ensure stability as |
| // [cyclicCandidates] is sensitive to if the platform (or other modules) |
| // are included in [classes]. |
| for (LocatedMessage message in messages.keys.toList()..sort()) { |
| messages[message].addProblem( |
| message.messageObject, message.charOffset, message.length); |
| } |
| } |
| ticker.logMs("Found cycles"); |
| Set<ClassBuilder> blackListedClasses = new Set<ClassBuilder>.from([ |
| coreLibrary["bool"], |
| coreLibrary["int"], |
| coreLibrary["num"], |
| coreLibrary["double"], |
| coreLibrary["String"], |
| coreLibrary["Null"], |
| ]); |
| for (ClassBuilder cls in classes) { |
| if (cls.library.loader != this) continue; |
| Set<ClassBuilder> directSupertypes = new Set<ClassBuilder>(); |
| target.addDirectSupertype(cls, directSupertypes); |
| for (ClassBuilder supertype in directSupertypes) { |
| if (supertype is EnumBuilder) { |
| cls.addProblem(templateExtendingEnum.withArguments(supertype.name), |
| cls.charOffset, noLength); |
| } else if (!cls.library.mayImplementRestrictedTypes && |
| blackListedClasses.contains(supertype)) { |
| cls.addProblem( |
| templateExtendingRestricted.withArguments(supertype.name), |
| cls.charOffset, |
| noLength); |
| } |
| } |
| TypeBuilder mixedInType = cls.mixedInType; |
| if (mixedInType != null) { |
| bool isClassBuilder = false; |
| if (mixedInType is NamedTypeBuilder) { |
| var builder = mixedInType.declaration; |
| if (builder is ClassBuilder) { |
| isClassBuilder = true; |
| for (Declaration constructory |
| in builder.constructors.local.values) { |
| if (constructory.isConstructor && !constructory.isSynthetic) { |
| cls.addProblem( |
| templateIllegalMixinDueToConstructors |
| .withArguments(builder.fullNameForErrors), |
| cls.charOffset, |
| noLength, |
| context: [ |
| templateIllegalMixinDueToConstructorsCause |
| .withArguments(builder.fullNameForErrors) |
| .withLocation(constructory.fileUri, |
| constructory.charOffset, noLength) |
| ]); |
| } |
| } |
| } |
| } |
| if (!isClassBuilder) { |
| cls.addProblem( |
| templateIllegalMixin.withArguments(mixedInType.fullNameForErrors), |
| cls.charOffset, |
| noLength); |
| } |
| } |
| } |
| ticker.logMs("Checked restricted supertypes"); |
| |
| // Check imports and exports for duplicate names. |
| // This is rather silly, e.g. it makes importing 'foo' and exporting another |
| // 'foo' ok. |
| builders.forEach((Uri uri, LibraryBuilder library) { |
| if (library is SourceLibraryBuilder && library.loader == this) { |
| // Check exports. |
| if (library.exports.isNotEmpty) { |
| Map<String, List<Export>> nameToExports; |
| bool errorExports = false; |
| for (Export export in library.exports) { |
| String name = export.exported?.name ?? ''; |
| if (name != '') { |
| nameToExports ??= new Map<String, List<Export>>(); |
| List<Export> exports = nameToExports[name] ??= <Export>[]; |
| exports.add(export); |
| if (exports[0].exported != export.exported) errorExports = true; |
| } |
| } |
| if (errorExports) { |
| for (String name in nameToExports.keys) { |
| List<Export> exports = nameToExports[name]; |
| if (exports.length < 2) continue; |
| List<LocatedMessage> context = <LocatedMessage>[]; |
| for (Export export in exports.skip(1)) { |
| context.add(templateDuplicatedLibraryExportContext |
| .withArguments(name) |
| .withLocation(uri, export.charOffset, noLength)); |
| } |
| library.addProblem( |
| templateDuplicatedLibraryExport.withArguments(name), |
| exports[0].charOffset, |
| noLength, |
| uri, |
| context: context); |
| } |
| } |
| } |
| |
| // Check imports. |
| if (library.imports.isNotEmpty) { |
| Map<String, List<Import>> nameToImports; |
| bool errorImports; |
| for (Import import in library.imports) { |
| String name = import.imported?.name ?? ''; |
| if (name != '') { |
| nameToImports ??= new Map<String, List<Import>>(); |
| List<Import> imports = nameToImports[name] ??= <Import>[]; |
| imports.add(import); |
| if (imports[0].imported != import.imported) errorImports = true; |
| } |
| } |
| if (errorImports != null) { |
| for (String name in nameToImports.keys) { |
| List<Import> imports = nameToImports[name]; |
| if (imports.length < 2) continue; |
| List<LocatedMessage> context = <LocatedMessage>[]; |
| for (Import import in imports.skip(1)) { |
| context.add(templateDuplicatedLibraryImportContext |
| .withArguments(name) |
| .withLocation(uri, import.charOffset, noLength)); |
| } |
| library.addProblem( |
| templateDuplicatedLibraryImport.withArguments(name), |
| imports[0].charOffset, |
| noLength, |
| uri, |
| context: context); |
| } |
| } |
| } |
| } |
| }); |
| ticker.logMs("Checked imports and exports for duplicate names"); |
| } |
| |
| void buildComponent() { |
| builders.forEach((Uri uri, LibraryBuilder library) { |
| if (library.loader == this) { |
| SourceLibraryBuilder sourceLibrary = library; |
| L target = sourceLibrary.build(coreLibrary); |
| if (!library.isPatch && !library.isSynthetic) { |
| libraries.add(target); |
| } |
| } |
| }); |
| ticker.logMs("Built component"); |
| } |
| |
| Component computeFullComponent() { |
| Set<Library> libraries = new Set<Library>(); |
| List<Library> workList = <Library>[]; |
| builders.forEach((Uri uri, LibraryBuilder library) { |
| if (!library.isPatch && |
| (library.loader == this || library.fileUri.scheme == "dart")) { |
| if (libraries.add(library.target)) { |
| workList.add(library.target); |
| } |
| } |
| }); |
| while (workList.isNotEmpty) { |
| Library library = workList.removeLast(); |
| for (LibraryDependency dependency in library.dependencies) { |
| if (libraries.add(dependency.targetLibrary)) { |
| workList.add(dependency.targetLibrary); |
| } |
| } |
| } |
| return new Component()..libraries.addAll(libraries); |
| } |
| |
| void computeHierarchy() { |
| List<List> ambiguousTypesRecords = []; |
| HandleAmbiguousSupertypes onAmbiguousSupertypes = |
| (Class cls, Supertype a, Supertype b) { |
| if (ambiguousTypesRecords != null) { |
| ambiguousTypesRecords.add([cls, a, b]); |
| } |
| }; |
| if (hierarchy == null) { |
| hierarchy = new ClassHierarchy(computeFullComponent(), |
| onAmbiguousSupertypes: onAmbiguousSupertypes, |
| mixinInferrer: target.strongMode |
| ? new StrongModeMixinInferrer(this) |
| : new LegacyModeMixinInferrer()); |
| } else { |
| hierarchy.onAmbiguousSupertypes = onAmbiguousSupertypes; |
| Component component = computeFullComponent(); |
| hierarchy.applyTreeChanges(const [], component.libraries, |
| reissueAmbiguousSupertypesFor: component); |
| } |
| for (List record in ambiguousTypesRecords) { |
| handleAmbiguousSupertypes(record[0], record[1], record[2]); |
| } |
| ambiguousTypesRecords = null; |
| ticker.logMs("Computed class hierarchy"); |
| } |
| |
| void handleAmbiguousSupertypes(Class cls, Supertype a, Supertype b) { |
| String name = cls.name; |
| TypeEnvironment env = new TypeEnvironment(coreTypes, hierarchy, |
| strongMode: target.strongMode); |
| |
| if (cls.isAnonymousMixin) return; |
| |
| if (env.isSubtypeOf(a.asInterfaceType, b.asInterfaceType)) return; |
| addProblem( |
| templateAmbiguousSupertypes.withArguments( |
| name, a.asInterfaceType, b.asInterfaceType), |
| cls.fileOffset, |
| noLength, |
| cls.fileUri); |
| } |
| |
| void ignoreAmbiguousSupertypes(Class cls, Supertype a, Supertype b) {} |
| |
| void computeCoreTypes(Component component) { |
| coreTypes = new CoreTypes(component); |
| |
| futureOfBottom = new InterfaceType( |
| coreTypes.futureClass, <DartType>[const BottomType()]); |
| iterableOfBottom = new InterfaceType( |
| coreTypes.iterableClass, <DartType>[const BottomType()]); |
| streamOfBottom = new InterfaceType( |
| coreTypes.streamClass, <DartType>[const BottomType()]); |
| |
| ticker.logMs("Computed core types"); |
| } |
| |
| void checkSupertypes(List<SourceClassBuilder> sourceClasses) { |
| for (SourceClassBuilder builder in sourceClasses) { |
| if (builder.library.loader == this) { |
| builder.checkSupertypes(coreTypes); |
| } |
| } |
| ticker.logMs("Checked overrides"); |
| } |
| |
| void checkOverrides(List<SourceClassBuilder> sourceClasses) { |
| assert(hierarchy != null); |
| for (SourceClassBuilder builder in sourceClasses) { |
| if (builder.library.loader == this) { |
| builder.checkOverrides( |
| hierarchy, typeInferenceEngine?.typeSchemaEnvironment); |
| } |
| } |
| ticker.logMs("Checked overrides"); |
| } |
| |
| void checkAbstractMembers(List<SourceClassBuilder> sourceClasses) { |
| if (!target.strongMode) return; |
| assert(hierarchy != null); |
| for (SourceClassBuilder builder in sourceClasses) { |
| if (builder.library.loader == this) { |
| builder.checkAbstractMembers(coreTypes, hierarchy); |
| } |
| } |
| ticker.logMs("Checked abstract members"); |
| } |
| |
| void checkRedirectingFactories(List<SourceClassBuilder> sourceClasses) { |
| if (!target.strongMode) return; |
| for (SourceClassBuilder builder in sourceClasses) { |
| if (builder.library.loader == this) { |
| builder.checkRedirectingFactories( |
| typeInferenceEngine.typeSchemaEnvironment); |
| } |
| } |
| ticker.logMs("Checked redirecting factories"); |
| } |
| |
| void addNoSuchMethodForwarders(List<SourceClassBuilder> sourceClasses) { |
| if (!target.backendTarget.enableNoSuchMethodForwarders) return; |
| |
| List<Class> changedClasses = new List<Class>(); |
| for (SourceClassBuilder builder in sourceClasses) { |
| if (builder.library.loader == this) { |
| if (builder.addNoSuchMethodForwarders(target, hierarchy)) { |
| changedClasses.add(builder.target); |
| } |
| } |
| } |
| hierarchy.applyMemberChanges(changedClasses, findDescendants: true); |
| ticker.logMs("Added noSuchMethod forwarders"); |
| } |
| |
| void createTypeInferenceEngine() { |
| typeInferenceEngine = |
| new ShadowTypeInferenceEngine(instrumentation, target.strongMode); |
| } |
| |
| void performTopLevelInference(List<SourceClassBuilder> sourceClasses) { |
| if (target.disableTypeInference) return; |
| |
| /// The first phase of top level initializer inference, which consists of |
| /// creating kernel objects for all fields and top level variables that |
| /// might be subject to type inference, and records dependencies between |
| /// them. |
| typeInferenceEngine.prepareTopLevel(coreTypes, hierarchy); |
| interfaceResolver = new InterfaceResolver( |
| typeInferenceEngine, |
| typeInferenceEngine.typeSchemaEnvironment, |
| instrumentation, |
| target.strongMode); |
| builders.forEach((Uri uri, LibraryBuilder library) { |
| if (library.loader == this) { |
| library.forEach((String name, Declaration member) { |
| if (member is FieldBuilder) { |
| member.prepareTopLevelInference(); |
| } |
| }); |
| } |
| }); |
| { |
| // Note: we need to create a list before iterating, since calling |
| // builder.prepareTopLevelInference causes further class hierarchy |
| // queries to be made which would otherwise result in a concurrent |
| // modification exception. |
| List<Class> classes = new List<Class>(sourceClasses.length); |
| for (int i = 0; i < sourceClasses.length; i++) { |
| classes[i] = sourceClasses[i].target; |
| } |
| orderedClasses = null; |
| List<ClassBuilder> result = new List<ClassBuilder>(sourceClasses.length); |
| int i = 0; |
| for (Class cls |
| in new List<Class>.from(hierarchy.getOrderedClasses(classes))) { |
| result[i++] = ShadowClass.getClassInferenceInfo(cls).builder |
| ..prepareTopLevelInference(); |
| } |
| if (i != result.length) { |
| unexpected("${result.length}", "$i", -1, null); |
| } |
| orderedClasses = result; |
| } |
| typeInferenceEngine.isTypeInferencePrepared = true; |
| ticker.logMs("Prepared top level inference"); |
| |
| /// The second phase of top level initializer inference, which is to visit |
| /// fields and top level variables in topologically-sorted order and assign |
| /// their types. |
| typeInferenceEngine.finishTopLevelFields(); |
| List<Class> changedClasses = new List<Class>(); |
| for (var builder in orderedClasses) { |
| ShadowClass class_ = builder.target; |
| int memberCount = class_.fields.length + |
| class_.constructors.length + |
| class_.procedures.length + |
| class_.redirectingFactoryConstructors.length; |
| class_.finalizeCovariance(interfaceResolver); |
| ShadowClass.clearClassInferenceInfo(class_); |
| int newMemberCount = class_.fields.length + |
| class_.constructors.length + |
| class_.procedures.length + |
| class_.redirectingFactoryConstructors.length; |
| if (newMemberCount != memberCount) { |
| // The inference potentially adds new members (but doesn't otherwise |
| // change the classes), so if the member count has changed we need to |
| // update the class in the class hierarchy. |
| changedClasses.add(class_); |
| } |
| } |
| |
| orderedClasses = null; |
| typeInferenceEngine.finishTopLevelInitializingFormals(); |
| if (instrumentation != null) { |
| builders.forEach((Uri uri, LibraryBuilder library) { |
| if (library.loader == this) { |
| library.instrumentTopLevelInference(instrumentation); |
| } |
| }); |
| } |
| interfaceResolver = null; |
| // Since finalization of covariance may have added forwarding stubs, we need |
| // to recompute the class hierarchy so that method compilation will properly |
| // target those forwarding stubs. |
| hierarchy.onAmbiguousSupertypes = ignoreAmbiguousSupertypes; |
| hierarchy.applyMemberChanges(changedClasses, findDescendants: true); |
| ticker.logMs("Performed top level inference"); |
| } |
| |
| Expression instantiateInvocation(Expression receiver, String name, |
| Arguments arguments, int offset, bool isSuper) { |
| return target.backendTarget.instantiateInvocation( |
| coreTypes, receiver, name, arguments, offset, isSuper); |
| } |
| |
| Expression instantiateNoSuchMethodError( |
| Expression receiver, String name, Arguments arguments, int offset, |
| {bool isMethod: false, |
| bool isGetter: false, |
| bool isSetter: false, |
| bool isField: false, |
| bool isLocalVariable: false, |
| bool isDynamic: false, |
| bool isSuper: false, |
| bool isStatic: false, |
| bool isConstructor: false, |
| bool isTopLevel: false}) { |
| return target.backendTarget.instantiateNoSuchMethodError( |
| coreTypes, receiver, name, arguments, offset, |
| isMethod: isMethod, |
| isGetter: isGetter, |
| isSetter: isSetter, |
| isField: isField, |
| isLocalVariable: isLocalVariable, |
| isDynamic: isDynamic, |
| isSuper: isSuper, |
| isStatic: isStatic, |
| isConstructor: isConstructor, |
| isTopLevel: isTopLevel); |
| } |
| |
| Expression throwCompileConstantError(Expression error) { |
| return target.backendTarget.throwCompileConstantError(coreTypes, error); |
| } |
| |
| Expression buildProblem(Message message, int offset, int length, Uri uri) { |
| String text = target.context |
| .format(message.withLocation(uri, offset, length), Severity.error); |
| return target.backendTarget.buildCompileTimeError(coreTypes, text, offset); |
| } |
| |
| void recordMessage(Severity severity, Message message, int charOffset, |
| int length, Uri fileUri, |
| {List<LocatedMessage> context}) { |
| if (instrumentation == null) return; |
| |
| if (charOffset == -1 && |
| (message.code == fasta_codes.codeConstConstructorWithBody || |
| message.code == fasta_codes.codeConstructorNotFound || |
| message.code == fasta_codes.codeSuperclassHasNoDefaultConstructor || |
| message.code == fasta_codes.codeTypeArgumentsOnTypeVariable || |
| message.code == fasta_codes.codeUnspecified)) { |
| // TODO(ahe): All warnings should have a charOffset, but currently, some |
| // warnings lack them. |
| return; |
| } |
| |
| String severityString; |
| switch (severity) { |
| case Severity.error: |
| severityString = "error"; |
| break; |
| |
| case Severity.internalProblem: |
| severityString = "internal problem"; |
| break; |
| |
| case Severity.warning: |
| severityString = "warning"; |
| break; |
| |
| case Severity.errorLegacyWarning: |
| // Should have been resolved to either error or warning at this point. |
| // Use a property name expressing that, in case it slips through. |
| severityString = "unresolved severity"; |
| break; |
| |
| case Severity.context: |
| severityString = "context"; |
| break; |
| |
| case Severity.ignored: |
| unhandled("IGNORED", "recordMessage", charOffset, fileUri); |
| return; |
| } |
| instrumentation.record( |
| fileUri, |
| charOffset, |
| severityString, |
| // TODO(ahe): Should I add an InstrumentationValue for Message? |
| new InstrumentationValueLiteral(message.code.name)); |
| if (context != null) { |
| for (LocatedMessage contextMessage in context) { |
| instrumentation.record( |
| contextMessage.uri, |
| contextMessage.charOffset, |
| "context", |
| new InstrumentationValueLiteral(contextMessage.code.name)); |
| } |
| } |
| } |
| |
| void releaseAncillaryResources() { |
| hierarchy = null; |
| typeInferenceEngine = null; |
| } |
| } |
| |
| const String defaultDartCoreSource = """ |
| import 'dart:_internal'; |
| import 'dart:async'; |
| |
| print(object) {} |
| |
| class Iterator {} |
| |
| class Iterable {} |
| |
| class List extends Iterable { |
| factory List.unmodifiable(elements) => null; |
| } |
| |
| class Map extends Iterable { |
| factory Map.unmodifiable(other) => null; |
| } |
| |
| class NoSuchMethodError { |
| NoSuchMethodError.withInvocation(receiver, invocation); |
| } |
| |
| class Null {} |
| |
| class Object { |
| noSuchMethod(invocation) => null; |
| } |
| |
| class String {} |
| |
| class Symbol {} |
| |
| class Type {} |
| |
| class _InvocationMirror { |
| _InvocationMirror._withType(_memberName, _type, _typeArguments, |
| _positionalArguments, _namedArguments); |
| } |
| |
| class bool {} |
| |
| class double extends num {} |
| |
| class int extends num {} |
| |
| class num {} |
| |
| class _SyncIterable {} |
| |
| class _SyncIterator { |
| var _current; |
| var _yieldEachIterable; |
| } |
| """; |
| |
| const String defaultDartAsyncSource = """ |
| _asyncErrorWrapperHelper(continuation) {} |
| |
| _asyncStackTraceHelper(async_op) {} |
| |
| _asyncThenWrapperHelper(continuation) {} |
| |
| _awaitHelper(object, thenCallback, errorCallback, awaiter) {} |
| |
| _completeOnAsyncReturn(completer, value) {} |
| |
| class _AsyncStarStreamController { |
| add(event) {} |
| |
| addError(error, stackTrace) {} |
| |
| addStream(stream) {} |
| |
| close() {} |
| |
| get stream => null; |
| } |
| |
| class Completer { |
| factory Completer.sync() => null; |
| |
| get future; |
| |
| complete([value]); |
| |
| completeError(error, [stackTrace]); |
| } |
| |
| class Future { |
| factory Future.microtask(computation) => null; |
| } |
| |
| class FutureOr { |
| } |
| |
| class _AsyncAwaitCompleter implements Completer { |
| get future => null; |
| |
| complete([value]) {} |
| |
| completeError(error, [stackTrace]) {} |
| } |
| |
| class Stream {} |
| |
| class _StreamIterator { |
| get current => null; |
| |
| moveNext() {} |
| |
| cancel() {} |
| } |
| """; |
