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| 1 // Copyright (c) 2017, the Dart project authors. Please see the AUTHORS file |
| 2 // for details. All rights reserved. Use of this source code is governed by a |
| 3 // BSD-style license that can be found in the LICENSE file. |
| 4 |
| 5 /// Additions to Fasta for generating .dill (Kernel IR) files with dart2js patch |
| 6 /// files and native hooks. |
| 7 library compiler.src.kernel.fasta_support; |
| 8 |
| 9 // TODO(sigmund): get rid of this file. Fasta should be agnostic of the |
| 10 // target platform, at which point this should not be necessary. In particular, |
| 11 // we need to: |
| 12 // - add a fasta flag to configure the platform library location. |
| 13 // - add a fasta flag to specify which sdk libraries should be built-in |
| 14 // (that would replace `loadExtraRequiredLibraries`). |
| 15 // - add flags to fasta to turn on various transformations. |
| 16 // - get rid of `native` in dart2js patches or unify the syntax with the VM. |
| 17 |
| 18 import 'dart:async' show Future; |
| 19 import 'dart:io' show exitCode; |
| 20 |
| 21 import 'package:front_end/file_system.dart'; |
| 22 import 'package:front_end/physical_file_system.dart'; |
| 23 import 'package:front_end/src/fasta/kernel/utils.dart'; |
| 24 import 'package:kernel/ast.dart' show Source, Library; |
| 25 import 'package:kernel/target/targets.dart' show TargetFlags, NoneTarget; |
| 26 |
| 27 import 'package:front_end/src/fasta/builder/builder.dart' show LibraryBuilder; |
| 28 import 'package:front_end/src/fasta/compiler_context.dart' show CompilerContext; |
| 29 import 'package:front_end/src/fasta/dill/dill_target.dart' show DillTarget; |
| 30 import 'package:front_end/src/fasta/fasta.dart' show CompileTask; |
| 31 import 'package:front_end/src/fasta/kernel/kernel_target.dart' |
| 32 show KernelTarget; |
| 33 import 'package:front_end/src/fasta/loader.dart' show Loader; |
| 34 import 'package:front_end/src/fasta/parser/parser.dart' show optional; |
| 35 import 'package:front_end/src/fasta/source/source_loader.dart' |
| 36 show SourceLoader; |
| 37 import 'package:front_end/src/scanner/token.dart' show Token; |
| 38 import 'package:front_end/src/fasta/ticker.dart' show Ticker; |
| 39 import 'package:front_end/src/fasta/translate_uri.dart' show TranslateUri; |
| 40 |
| 41 import 'package:compiler/src/native/native.dart' show maybeEnableNative; |
| 42 |
| 43 /// Generates a platform.dill file containing the compiled Kernel IR of the |
| 44 /// dart2js SDK. |
| 45 Future compilePlatform(Uri patchedSdk, Uri fullOutput, |
| 46 {Uri outlineOutput, Uri packages}) async { |
| 47 Uri deps = Uri.base.resolveUri(new Uri.file("${fullOutput.toFilePath()}.d")); |
| 48 TranslateUri uriTranslator = await TranslateUri |
| 49 .parse(PhysicalFileSystem.instance, patchedSdk, packages: packages); |
| 50 var ticker = new Ticker(isVerbose: false); |
| 51 var dillTarget = new DillTargetForDart2js(ticker, uriTranslator); |
| 52 var kernelTarget = |
| 53 new KernelTargetForDart2js(dillTarget, uriTranslator, false); |
| 54 |
| 55 kernelTarget.read(Uri.parse("dart:core")); |
| 56 await dillTarget.buildOutlines(); |
| 57 var outline = await kernelTarget.buildOutlines(); |
| 58 await writeProgramToFile(outline, outlineOutput); |
| 59 ticker.logMs("Wrote outline to ${outlineOutput.toFilePath()}"); |
| 60 |
| 61 if (exitCode != 0) return null; |
| 62 var program = await kernelTarget.buildProgram(); |
| 63 await writeProgramToFile(program, fullOutput); |
| 64 ticker.logMs("Wrote program to ${fullOutput.toFilePath()}"); |
| 65 await kernelTarget.writeDepsFile(fullOutput, deps); |
| 66 } |
| 67 |
| 68 /// Extends the internal fasta [CompileTask] to use a dart2js-aware [DillTarget] |
| 69 /// and [KernelTarget]. |
| 70 class Dart2jsCompileTask extends CompileTask { |
| 71 Dart2jsCompileTask(CompilerContext c, Ticker ticker) : super(c, ticker); |
| 72 |
| 73 @override |
| 74 DillTarget createDillTarget(TranslateUri uriTranslator) { |
| 75 return new DillTargetForDart2js(ticker, uriTranslator); |
| 76 } |
| 77 |
| 78 @override |
| 79 KernelTarget createKernelTarget( |
| 80 DillTarget dillTarget, TranslateUri uriTranslator, bool strongMode) { |
| 81 return new KernelTargetForDart2js( |
| 82 dillTarget, uriTranslator, strongMode, c.uriToSource); |
| 83 } |
| 84 } |
| 85 |
| 86 /// Specializes [KernelTarget] to build kernel for dart2js: no transformations |
| 87 /// are run, JS-specific libraries are included in the SDK, and native clauses |
| 88 /// have no string parameter. |
| 89 class KernelTargetForDart2js extends KernelTarget { |
| 90 KernelTargetForDart2js( |
| 91 DillTarget target, TranslateUri uriTranslator, bool strongMode, |
| 92 [Map<String, Source> uriToSource]) |
| 93 : super(PhysicalFileSystem.instance, target, uriTranslator, uriToSource); |
| 94 @override |
| 95 SourceLoader<Library> createLoader() => |
| 96 new SourceLoaderForDart2js<Library>(fileSystem, this); |
| 97 |
| 98 @override |
| 99 bool enableNative(LibraryBuilder library) => maybeEnableNative(library.uri); |
| 100 |
| 101 @override |
| 102 Token skipNativeClause(Token token) => _skipNative(token); |
| 103 |
| 104 @override |
| 105 String extractNativeMethodName(Token token) => ""; |
| 106 |
| 107 @override |
| 108 void loadExtraRequiredLibraries(Loader loader) => _loadExtras(loader); |
| 109 |
| 110 @override |
| 111 void runBuildTransformations() {} |
| 112 } |
| 113 |
| 114 /// Specializes [SourceLoader] to build kernel for dart2js: dart2js extends |
| 115 /// bool, int, num, double, and String in a different platform library than |
| 116 /// `dart:core`. |
| 117 class SourceLoaderForDart2js<L> extends SourceLoader<L> { |
| 118 LibraryBuilder interceptorsLibrary; |
| 119 |
| 120 @override |
| 121 LibraryBuilder read(Uri uri, int charOffset, |
| 122 {Uri fileUri, LibraryBuilder accessor, bool isPatch: false}) { |
| 123 var library = super.read(uri, charOffset, |
| 124 fileUri: fileUri, accessor: accessor, isPatch: isPatch); |
| 125 if (uri.scheme == 'dart' && uri.path == '_interceptors') { |
| 126 interceptorsLibrary = library; |
| 127 } |
| 128 return library; |
| 129 } |
| 130 |
| 131 @override |
| 132 bool canImplementRestrictedTypes(LibraryBuilder library) => |
| 133 library == coreLibrary || library == interceptorsLibrary; |
| 134 |
| 135 SourceLoaderForDart2js(FileSystem fs, KernelTarget target) |
| 136 : super(fs, target); |
| 137 } |
| 138 |
| 139 /// Specializes [DillTarget] to build kernel for dart2js: JS-specific libraries |
| 140 /// are included in the SDK, and native clauses have no string parameter. |
| 141 class DillTargetForDart2js extends DillTarget { |
| 142 DillTargetForDart2js(Ticker ticker, TranslateUri uriTranslator) |
| 143 : super(ticker, uriTranslator, new NoneTarget(new TargetFlags())); |
| 144 |
| 145 @override |
| 146 Token skipNativeClause(Token token) => _skipNative(token); |
| 147 |
| 148 @override |
| 149 String extractNativeMethodName(Token token) => ""; |
| 150 |
| 151 @override |
| 152 void loadExtraRequiredLibraries(Loader loader) => _loadExtras(loader); |
| 153 } |
| 154 |
| 155 /// We use native clauses of this form in our dart2js patch files: |
| 156 /// |
| 157 /// methodDeclaration() native; |
| 158 /// |
| 159 /// The default front_end parser doesn't support this, so it will trigger an |
| 160 /// error recovery condition. This function is used while parsing to detect this |
| 161 /// form and continue parsing. |
| 162 /// |
| 163 /// Note that `native` isn't part of the Dart Language Specification, and the VM |
| 164 /// uses it a slightly different form. We hope to remove this syntax in our |
| 165 /// dart2js patch files and replace it with the external modifier. |
| 166 Token _skipNative(Token token) { |
| 167 if (!optional("native", token)) return null; |
| 168 if (!optional(";", token.next)) return null; |
| 169 return token; |
| 170 } |
| 171 |
| 172 void _loadExtras(Loader loader) { |
| 173 for (String uri in _extraDart2jsLibraries) { |
| 174 loader.read(Uri.parse(uri), -1); |
| 175 } |
| 176 } |
| 177 |
| 178 const _extraDart2jsLibraries = const <String>[ |
| 179 'dart:_chrome', |
| 180 'dart:_foreign_helper', |
| 181 'dart:_interceptors', |
| 182 'dart:_internal', |
| 183 'dart:_isolate_helper', |
| 184 'dart:_js_embedded_names', |
| 185 'dart:_js_helper', |
| 186 'dart:_js_mirrors', |
| 187 'dart:_js_names', |
| 188 'dart:_native_typed_data', |
| 189 'dart:async', |
| 190 'dart:collection', |
| 191 'dart:html', |
| 192 'dart:html_common', |
| 193 'dart:indexed_db', |
| 194 'dart:js', |
| 195 'dart:js_util', |
| 196 'dart:mirrors', |
| 197 'dart:svg', |
| 198 'dart:web_audio', |
| 199 'dart:web_gl', |
| 200 'dart:web_sql', |
| 201 ]; |
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