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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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