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| 1 // Copyright (c) 2012, 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 part of dart2js; | |
| 6 | |
| 7 typedef ItemCompilationContext ItemCompilationContextCreator(); | |
| 8 | |
| 9 class EnqueueTask extends CompilerTask { | |
| 10 final ResolutionEnqueuer resolution; | |
| 11 final CodegenEnqueuer codegen; | |
| 12 | |
| 13 String get name => 'Enqueue'; | |
| 14 | |
| 15 EnqueueTask(Compiler compiler) | |
| 16 : resolution = new ResolutionEnqueuer( | |
| 17 compiler, compiler.backend.createItemCompilationContext), | |
| 18 codegen = new CodegenEnqueuer( | |
| 19 compiler, compiler.backend.createItemCompilationContext), | |
| 20 super(compiler) { | |
| 21 codegen.task = this; | |
| 22 resolution.task = this; | |
| 23 | |
| 24 codegen.nativeEnqueuer = compiler.backend.nativeCodegenEnqueuer(codegen); | |
| 25 resolution.nativeEnqueuer = | |
| 26 compiler.backend.nativeResolutionEnqueuer(resolution); | |
| 27 } | |
| 28 | |
| 29 void forgetElement(Element element) { | |
| 30 resolution.forgetElement(element); | |
| 31 codegen.forgetElement(element); | |
| 32 } | |
| 33 } | |
| 34 | |
| 35 abstract class Enqueuer { | |
| 36 final String name; | |
| 37 final Compiler compiler; // TODO(ahe): Remove this dependency. | |
| 38 final ItemCompilationContextCreator itemCompilationContextCreator; | |
| 39 final Map<String, Set<Element>> instanceMembersByName | |
| 40 = new Map<String, Set<Element>>(); | |
| 41 final Map<String, Set<Element>> instanceFunctionsByName | |
| 42 = new Map<String, Set<Element>>(); | |
| 43 final Set<ClassElement> _processedClasses = new Set<ClassElement>(); | |
| 44 Set<ClassElement> recentClasses = new Setlet<ClassElement>(); | |
| 45 final Universe universe = new Universe(); | |
| 46 | |
| 47 static final TRACE_MIRROR_ENQUEUING = | |
| 48 const bool.fromEnvironment("TRACE_MIRROR_ENQUEUING"); | |
| 49 | |
| 50 bool queueIsClosed = false; | |
| 51 EnqueueTask task; | |
| 52 native.NativeEnqueuer nativeEnqueuer; // Set by EnqueueTask | |
| 53 | |
| 54 bool hasEnqueuedReflectiveElements = false; | |
| 55 bool hasEnqueuedReflectiveStaticFields = false; | |
| 56 | |
| 57 Enqueuer(this.name, this.compiler, this.itemCompilationContextCreator); | |
| 58 | |
| 59 Queue<WorkItem> get queue; | |
| 60 bool get queueIsEmpty => queue.isEmpty; | |
| 61 | |
| 62 /// Returns [:true:] if this enqueuer is the resolution enqueuer. | |
| 63 bool get isResolutionQueue => false; | |
| 64 | |
| 65 QueueFilter get filter => compiler.enqueuerFilter; | |
| 66 | |
| 67 /// Returns [:true:] if [member] has been processed by this enqueuer. | |
| 68 bool isProcessed(Element member); | |
| 69 | |
| 70 /** | |
| 71 * Documentation wanted -- johnniwinther | |
| 72 * | |
| 73 * Invariant: [element] must be a declaration element. | |
| 74 */ | |
| 75 void addToWorkList(Element element) { | |
| 76 assert(invariant(element, element.isDeclaration)); | |
| 77 internalAddToWorkList(element); | |
| 78 } | |
| 79 | |
| 80 /** | |
| 81 * Adds [element] to the work list if it has not already been processed. | |
| 82 * | |
| 83 * Returns [true] if the element was actually added to the queue. | |
| 84 */ | |
| 85 bool internalAddToWorkList(Element element); | |
| 86 | |
| 87 void registerInstantiatedType(InterfaceType type, Registry registry, | |
| 88 {bool mirrorUsage: false}) { | |
| 89 task.measure(() { | |
| 90 ClassElement cls = type.element; | |
| 91 registry.registerDependency(cls); | |
| 92 cls.ensureResolved(compiler); | |
| 93 universe.registerTypeInstantiation(type, byMirrors: mirrorUsage); | |
| 94 processInstantiatedClass(cls); | |
| 95 }); | |
| 96 } | |
| 97 | |
| 98 void registerInstantiatedClass(ClassElement cls, Registry registry, | |
| 99 {bool mirrorUsage: false}) { | |
| 100 cls.ensureResolved(compiler); | |
| 101 registerInstantiatedType(cls.rawType, registry, mirrorUsage: mirrorUsage); | |
| 102 } | |
| 103 | |
| 104 bool checkNoEnqueuedInvokedInstanceMethods() { | |
| 105 return filter.checkNoEnqueuedInvokedInstanceMethods(this); | |
| 106 } | |
| 107 | |
| 108 void processInstantiatedClassMembers(ClassElement cls) { | |
| 109 cls.implementation.forEachMember(processInstantiatedClassMember); | |
| 110 } | |
| 111 | |
| 112 void processInstantiatedClassMember(ClassElement cls, Element member) { | |
| 113 assert(invariant(member, member.isDeclaration)); | |
| 114 if (isProcessed(member)) return; | |
| 115 if (!member.isInstanceMember) return; | |
| 116 | |
| 117 String memberName = member.name; | |
| 118 | |
| 119 if (member.kind == ElementKind.FIELD) { | |
| 120 // The obvious thing to test here would be "member.isNative", | |
| 121 // however, that only works after metadata has been parsed/analyzed, | |
| 122 // and that may not have happened yet. | |
| 123 // So instead we use the enclosing class, which we know have had | |
| 124 // its metadata parsed and analyzed. | |
| 125 // Note: this assumes that there are no non-native fields on native | |
| 126 // classes, which may not be the case when a native class is subclassed. | |
| 127 if (cls.isNative) { | |
| 128 compiler.world.registerUsedElement(member); | |
| 129 nativeEnqueuer.handleFieldAnnotations(member); | |
| 130 if (universe.hasInvokedGetter(member, compiler.world) || | |
| 131 universe.hasInvocation(member, compiler.world)) { | |
| 132 nativeEnqueuer.registerFieldLoad(member); | |
| 133 // In handleUnseenSelector we can't tell if the field is loaded or | |
| 134 // stored. We need the basic algorithm to be Church-Rosser, since the | |
| 135 // resolution 'reduction' order is different to the codegen order. So | |
| 136 // register that the field is also stored. In other words: if we | |
| 137 // don't register the store here during resolution, the store could be | |
| 138 // registered during codegen on the handleUnseenSelector path, and | |
| 139 // cause the set of codegen elements to include unresolved elements. | |
| 140 nativeEnqueuer.registerFieldStore(member); | |
| 141 addToWorkList(member); | |
| 142 return; | |
| 143 } | |
| 144 if (universe.hasInvokedSetter(member, compiler.world)) { | |
| 145 nativeEnqueuer.registerFieldStore(member); | |
| 146 // See comment after registerFieldLoad above. | |
| 147 nativeEnqueuer.registerFieldLoad(member); | |
| 148 addToWorkList(member); | |
| 149 return; | |
| 150 } | |
| 151 // Native fields need to go into instanceMembersByName as they | |
| 152 // are virtual instantiation points and escape points. | |
| 153 } else { | |
| 154 // All field initializers must be resolved as they could | |
| 155 // have an observable side-effect (and cannot be tree-shaken | |
| 156 // away). | |
| 157 addToWorkList(member); | |
| 158 return; | |
| 159 } | |
| 160 } else if (member.kind == ElementKind.FUNCTION) { | |
| 161 FunctionElement function = member; | |
| 162 function.computeSignature(compiler); | |
| 163 if (function.name == Compiler.NO_SUCH_METHOD) { | |
| 164 enableNoSuchMethod(function); | |
| 165 } | |
| 166 if (function.name == Compiler.CALL_OPERATOR_NAME && | |
| 167 !cls.typeVariables.isEmpty) { | |
| 168 registerCallMethodWithFreeTypeVariables( | |
| 169 function, compiler.globalDependencies); | |
| 170 } | |
| 171 // If there is a property access with the same name as a method we | |
| 172 // need to emit the method. | |
| 173 if (universe.hasInvokedGetter(function, compiler.world)) { | |
| 174 registerClosurizedMember(function, compiler.globalDependencies); | |
| 175 addToWorkList(function); | |
| 176 return; | |
| 177 } | |
| 178 // Store the member in [instanceFunctionsByName] to catch | |
| 179 // getters on the function. | |
| 180 instanceFunctionsByName.putIfAbsent(memberName, () => new Set<Element>()) | |
| 181 .add(member); | |
| 182 if (universe.hasInvocation(function, compiler.world)) { | |
| 183 addToWorkList(function); | |
| 184 return; | |
| 185 } | |
| 186 } else if (member.kind == ElementKind.GETTER) { | |
| 187 FunctionElement getter = member; | |
| 188 getter.computeSignature(compiler); | |
| 189 if (universe.hasInvokedGetter(getter, compiler.world)) { | |
| 190 addToWorkList(getter); | |
| 191 return; | |
| 192 } | |
| 193 // We don't know what selectors the returned closure accepts. If | |
| 194 // the set contains any selector we have to assume that it matches. | |
| 195 if (universe.hasInvocation(getter, compiler.world)) { | |
| 196 addToWorkList(getter); | |
| 197 return; | |
| 198 } | |
| 199 } else if (member.kind == ElementKind.SETTER) { | |
| 200 FunctionElement setter = member; | |
| 201 setter.computeSignature(compiler); | |
| 202 if (universe.hasInvokedSetter(setter, compiler.world)) { | |
| 203 addToWorkList(setter); | |
| 204 return; | |
| 205 } | |
| 206 } | |
| 207 | |
| 208 // The element is not yet used. Add it to the list of instance | |
| 209 // members to still be processed. | |
| 210 instanceMembersByName.putIfAbsent(memberName, () => new Set<Element>()) | |
| 211 .add(member); | |
| 212 } | |
| 213 | |
| 214 void enableNoSuchMethod(Element element) {} | |
| 215 void enableIsolateSupport() {} | |
| 216 | |
| 217 void processInstantiatedClass(ClassElement cls) { | |
| 218 task.measure(() { | |
| 219 if (_processedClasses.contains(cls)) return; | |
| 220 // The class must be resolved to compute the set of all | |
| 221 // supertypes. | |
| 222 cls.ensureResolved(compiler); | |
| 223 | |
| 224 void processClass(ClassElement cls) { | |
| 225 if (_processedClasses.contains(cls)) return; | |
| 226 | |
| 227 _processedClasses.add(cls); | |
| 228 recentClasses.add(cls); | |
| 229 cls.ensureResolved(compiler); | |
| 230 cls.implementation.forEachMember(processInstantiatedClassMember); | |
| 231 if (isResolutionQueue) { | |
| 232 compiler.resolver.checkClass(cls); | |
| 233 } | |
| 234 // We only tell the backend once that [cls] was instantiated, so | |
| 235 // any additional dependencies must be treated as global | |
| 236 // dependencies. | |
| 237 compiler.backend.registerInstantiatedClass( | |
| 238 cls, this, compiler.globalDependencies); | |
| 239 } | |
| 240 processClass(cls); | |
| 241 for (Link<DartType> supertypes = cls.allSupertypes; | |
| 242 !supertypes.isEmpty; supertypes = supertypes.tail) { | |
| 243 processClass(supertypes.head.element); | |
| 244 } | |
| 245 }); | |
| 246 } | |
| 247 | |
| 248 void registerNewSelector(Selector selector, | |
| 249 Map<String, Set<Selector>> selectorsMap) { | |
| 250 String name = selector.name; | |
| 251 Set<Selector> selectors = | |
| 252 selectorsMap.putIfAbsent(name, () => new Setlet<Selector>()); | |
| 253 if (!selectors.contains(selector)) { | |
| 254 selectors.add(selector); | |
| 255 handleUnseenSelector(name, selector); | |
| 256 } | |
| 257 } | |
| 258 | |
| 259 void registerInvocation(Selector selector) { | |
| 260 task.measure(() { | |
| 261 registerNewSelector(selector, universe.invokedNames); | |
| 262 }); | |
| 263 } | |
| 264 | |
| 265 void registerInvokedGetter(Selector selector) { | |
| 266 task.measure(() { | |
| 267 registerNewSelector(selector, universe.invokedGetters); | |
| 268 }); | |
| 269 } | |
| 270 | |
| 271 void registerInvokedSetter(Selector selector) { | |
| 272 task.measure(() { | |
| 273 registerNewSelector(selector, universe.invokedSetters); | |
| 274 }); | |
| 275 } | |
| 276 | |
| 277 /** | |
| 278 * Decides whether an element should be included to satisfy requirements | |
| 279 * of the mirror system. [includedEnclosing] provides a hint whether the | |
| 280 * enclosing element was included. | |
| 281 * | |
| 282 * The actual implementation depends on the current compiler phase. | |
| 283 */ | |
| 284 bool shouldIncludeElementDueToMirrors(Element element, | |
| 285 {bool includedEnclosing}); | |
| 286 | |
| 287 void logEnqueueReflectiveAction(action, [msg = ""]) { | |
| 288 if (TRACE_MIRROR_ENQUEUING) { | |
| 289 print("MIRROR_ENQUEUE (${isResolutionQueue ? "R" : "C"}): $action $msg"); | |
| 290 } | |
| 291 } | |
| 292 | |
| 293 /// Enqeue the constructor [ctor] if it is required for reflection. | |
| 294 /// | |
| 295 /// [enclosingWasIncluded] provides a hint whether the enclosing element was | |
| 296 /// needed for reflection. | |
| 297 void enqueueReflectiveConstructor(ConstructorElement ctor, | |
| 298 bool enclosingWasIncluded) { | |
| 299 if (shouldIncludeElementDueToMirrors(ctor, | |
| 300 includedEnclosing: enclosingWasIncluded)) { | |
| 301 logEnqueueReflectiveAction(ctor); | |
| 302 ClassElement cls = ctor.declaration.enclosingClass; | |
| 303 registerInstantiatedType(cls.rawType, compiler.mirrorDependencies, | |
| 304 mirrorUsage: true); | |
| 305 registerStaticUse(ctor.declaration); | |
| 306 } | |
| 307 } | |
| 308 | |
| 309 /// Enqeue the member [element] if it is required for reflection. | |
| 310 /// | |
| 311 /// [enclosingWasIncluded] provides a hint whether the enclosing element was | |
| 312 /// needed for reflection. | |
| 313 void enqueueReflectiveMember(Element element, bool enclosingWasIncluded) { | |
| 314 if (shouldIncludeElementDueToMirrors(element, | |
| 315 includedEnclosing: enclosingWasIncluded)) { | |
| 316 logEnqueueReflectiveAction(element); | |
| 317 if (element.isTypedef) { | |
| 318 TypedefElement typedef = element; | |
| 319 typedef.ensureResolved(compiler); | |
| 320 compiler.world.allTypedefs.add(element); | |
| 321 } else if (Elements.isStaticOrTopLevel(element)) { | |
| 322 registerStaticUse(element.declaration); | |
| 323 } else if (element.isInstanceMember) { | |
| 324 // We need to enqueue all members matching this one in subclasses, as | |
| 325 // well. | |
| 326 // TODO(herhut): Use TypedSelector.subtype for enqueueing | |
| 327 Selector selector = new Selector.fromElement(element); | |
| 328 registerSelectorUse(selector); | |
| 329 if (element.isField) { | |
| 330 Selector selector = | |
| 331 new Selector.setter(element.name, element.library); | |
| 332 registerInvokedSetter(selector); | |
| 333 } | |
| 334 } | |
| 335 } | |
| 336 } | |
| 337 | |
| 338 /// Enqeue the member [element] if it is required for reflection. | |
| 339 /// | |
| 340 /// [enclosingWasIncluded] provides a hint whether the enclosing element was | |
| 341 /// needed for reflection. | |
| 342 void enqueueReflectiveElementsInClass(ClassElement cls, | |
| 343 Iterable<ClassElement> recents, | |
| 344 bool enclosingWasIncluded) { | |
| 345 if (cls.library.isInternalLibrary || cls.isInjected) return; | |
| 346 bool includeClass = shouldIncludeElementDueToMirrors(cls, | |
| 347 includedEnclosing: enclosingWasIncluded); | |
| 348 if (includeClass) { | |
| 349 logEnqueueReflectiveAction(cls, "register"); | |
| 350 ClassElement decl = cls.declaration; | |
| 351 registerInstantiatedClass(decl, compiler.mirrorDependencies, | |
| 352 mirrorUsage: true); | |
| 353 } | |
| 354 // If the class is never instantiated, we know nothing of it can possibly | |
| 355 // be reflected upon. | |
| 356 // TODO(herhut): Add a warning if a mirrors annotation cannot hit. | |
| 357 if (recents.contains(cls.declaration)) { | |
| 358 logEnqueueReflectiveAction(cls, "members"); | |
| 359 cls.constructors.forEach((Element element) { | |
| 360 enqueueReflectiveConstructor(element, includeClass); | |
| 361 }); | |
| 362 cls.forEachClassMember((Member member) { | |
| 363 enqueueReflectiveMember(member.element, includeClass); | |
| 364 }); | |
| 365 } | |
| 366 } | |
| 367 | |
| 368 /// Enqeue special classes that might not be visible by normal means or that | |
| 369 /// would not normally be enqueued: | |
| 370 /// | |
| 371 /// [Closure] is treated specially as it is the superclass of all closures. | |
| 372 /// Although it is in an internal library, we mark it as reflectable. Note | |
| 373 /// that none of its methods are reflectable, unless reflectable by | |
| 374 /// inheritance. | |
| 375 void enqueueReflectiveSpecialClasses() { | |
| 376 Iterable<ClassElement> classes = | |
| 377 compiler.backend.classesRequiredForReflection; | |
| 378 for (ClassElement cls in classes) { | |
| 379 if (compiler.backend.referencedFromMirrorSystem(cls)) { | |
| 380 logEnqueueReflectiveAction(cls); | |
| 381 registerInstantiatedClass(cls, compiler.mirrorDependencies, | |
| 382 mirrorUsage: true); | |
| 383 } | |
| 384 } | |
| 385 } | |
| 386 | |
| 387 /// Enqeue all local members of the library [lib] if they are required for | |
| 388 /// reflection. | |
| 389 void enqueueReflectiveElementsInLibrary(LibraryElement lib, | |
| 390 Iterable<ClassElement> recents) { | |
| 391 bool includeLibrary = shouldIncludeElementDueToMirrors(lib, | |
| 392 includedEnclosing: false); | |
| 393 lib.forEachLocalMember((Element member) { | |
| 394 if (member.isClass) { | |
| 395 enqueueReflectiveElementsInClass(member, recents, includeLibrary); | |
| 396 } else { | |
| 397 enqueueReflectiveMember(member, includeLibrary); | |
| 398 } | |
| 399 }); | |
| 400 } | |
| 401 | |
| 402 /// Enqueue all elements that are matched by the mirrors used | |
| 403 /// annotation or, in lack thereof, all elements. | |
| 404 void enqueueReflectiveElements(Iterable<ClassElement> recents) { | |
| 405 if (!hasEnqueuedReflectiveElements) { | |
| 406 logEnqueueReflectiveAction("!START enqueueAll"); | |
| 407 // First round of enqueuing, visit everything that is visible to | |
| 408 // also pick up static top levels, etc. | |
| 409 // Also, during the first round, consider all classes that have been seen | |
| 410 // as recently seen, as we do not know how many rounds of resolution might | |
| 411 // have run before tree shaking is disabled and thus everything is | |
| 412 // enqueued. | |
| 413 recents = _processedClasses.toSet(); | |
| 414 compiler.log('Enqueuing everything'); | |
| 415 for (LibraryElement lib in compiler.libraryLoader.libraries) { | |
| 416 enqueueReflectiveElementsInLibrary(lib, recents); | |
| 417 } | |
| 418 enqueueReflectiveSpecialClasses(); | |
| 419 hasEnqueuedReflectiveElements = true; | |
| 420 hasEnqueuedReflectiveStaticFields = true; | |
| 421 logEnqueueReflectiveAction("!DONE enqueueAll"); | |
| 422 } else if (recents.isNotEmpty) { | |
| 423 // Keep looking at new classes until fixpoint is reached. | |
| 424 logEnqueueReflectiveAction("!START enqueueRecents"); | |
| 425 recents.forEach((ClassElement cls) { | |
| 426 enqueueReflectiveElementsInClass(cls, recents, | |
| 427 shouldIncludeElementDueToMirrors(cls.library, | |
| 428 includedEnclosing: false)); | |
| 429 }); | |
| 430 logEnqueueReflectiveAction("!DONE enqueueRecents"); | |
| 431 } | |
| 432 } | |
| 433 | |
| 434 /// Enqueue the static fields that have been marked as used by reflective | |
| 435 /// usage through `MirrorsUsed`. | |
| 436 void enqueueReflectiveStaticFields(Iterable<Element> elements) { | |
| 437 if (hasEnqueuedReflectiveStaticFields) return; | |
| 438 hasEnqueuedReflectiveStaticFields = true; | |
| 439 for (Element element in elements) { | |
| 440 enqueueReflectiveMember(element, true); | |
| 441 } | |
| 442 } | |
| 443 | |
| 444 void processSet( | |
| 445 Map<String, Set<Element>> map, | |
| 446 String memberName, | |
| 447 bool f(Element e)) { | |
| 448 Set<Element> members = map[memberName]; | |
| 449 if (members == null) return; | |
| 450 // [f] might add elements to [: map[memberName] :] during the loop below | |
| 451 // so we create a new list for [: map[memberName] :] and prepend the | |
| 452 // [remaining] members after the loop. | |
| 453 map[memberName] = new Set<Element>(); | |
| 454 Set<Element> remaining = new Set<Element>(); | |
| 455 for (Element member in members) { | |
| 456 if (!f(member)) remaining.add(member); | |
| 457 } | |
| 458 map[memberName].addAll(remaining); | |
| 459 } | |
| 460 | |
| 461 processInstanceMembers(String n, bool f(Element e)) { | |
| 462 processSet(instanceMembersByName, n, f); | |
| 463 } | |
| 464 | |
| 465 processInstanceFunctions(String n, bool f(Element e)) { | |
| 466 processSet(instanceFunctionsByName, n, f); | |
| 467 } | |
| 468 | |
| 469 void handleUnseenSelector(String methodName, Selector selector) { | |
| 470 processInstanceMembers(methodName, (Element member) { | |
| 471 if (selector.appliesUnnamed(member, compiler.world)) { | |
| 472 if (member.isFunction && selector.isGetter) { | |
| 473 registerClosurizedMember(member, compiler.globalDependencies); | |
| 474 } | |
| 475 if (member.isField && member.enclosingClass.isNative) { | |
| 476 if (selector.isGetter || selector.isCall) { | |
| 477 nativeEnqueuer.registerFieldLoad(member); | |
| 478 // We have to also handle storing to the field because we only get | |
| 479 // one look at each member and there might be a store we have not | |
| 480 // seen yet. | |
| 481 // TODO(sra): Process fields for storing separately. | |
| 482 nativeEnqueuer.registerFieldStore(member); | |
| 483 } else { | |
| 484 assert(selector.isSetter); | |
| 485 nativeEnqueuer.registerFieldStore(member); | |
| 486 // We have to also handle loading from the field because we only get | |
| 487 // one look at each member and there might be a load we have not | |
| 488 // seen yet. | |
| 489 // TODO(sra): Process fields for storing separately. | |
| 490 nativeEnqueuer.registerFieldLoad(member); | |
| 491 } | |
| 492 } | |
| 493 addToWorkList(member); | |
| 494 return true; | |
| 495 } | |
| 496 return false; | |
| 497 }); | |
| 498 if (selector.isGetter) { | |
| 499 processInstanceFunctions(methodName, (Element member) { | |
| 500 if (selector.appliesUnnamed(member, compiler.world)) { | |
| 501 registerClosurizedMember(member, compiler.globalDependencies); | |
| 502 return true; | |
| 503 } | |
| 504 return false; | |
| 505 }); | |
| 506 } | |
| 507 } | |
| 508 | |
| 509 /** | |
| 510 * Documentation wanted -- johnniwinther | |
| 511 * | |
| 512 * Invariant: [element] must be a declaration element. | |
| 513 */ | |
| 514 void registerStaticUse(Element element) { | |
| 515 if (element == null) return; | |
| 516 assert(invariant(element, element.isDeclaration)); | |
| 517 addToWorkList(element); | |
| 518 compiler.backend.registerStaticUse(element, this); | |
| 519 } | |
| 520 | |
| 521 void registerGetOfStaticFunction(FunctionElement element) { | |
| 522 registerStaticUse(element); | |
| 523 compiler.backend.registerGetOfStaticFunction(this); | |
| 524 universe.staticFunctionsNeedingGetter.add(element); | |
| 525 } | |
| 526 | |
| 527 void registerDynamicInvocation(Selector selector) { | |
| 528 assert(selector != null); | |
| 529 registerInvocation(selector); | |
| 530 } | |
| 531 | |
| 532 void registerSelectorUse(Selector selector) { | |
| 533 if (selector.isGetter) { | |
| 534 registerInvokedGetter(selector); | |
| 535 } else if (selector.isSetter) { | |
| 536 registerInvokedSetter(selector); | |
| 537 } else { | |
| 538 registerInvocation(selector); | |
| 539 } | |
| 540 } | |
| 541 | |
| 542 void registerDynamicGetter(Selector selector) { | |
| 543 registerInvokedGetter(selector); | |
| 544 } | |
| 545 | |
| 546 void registerDynamicSetter(Selector selector) { | |
| 547 registerInvokedSetter(selector); | |
| 548 } | |
| 549 | |
| 550 void registerGetterForSuperMethod(Element element) { | |
| 551 universe.methodsNeedingSuperGetter.add(element); | |
| 552 } | |
| 553 | |
| 554 void registerFieldGetter(Element element) { | |
| 555 universe.fieldGetters.add(element); | |
| 556 } | |
| 557 | |
| 558 void registerFieldSetter(Element element) { | |
| 559 universe.fieldSetters.add(element); | |
| 560 } | |
| 561 | |
| 562 void registerIsCheck(DartType type, Registry registry) { | |
| 563 type = universe.registerIsCheck(type, compiler); | |
| 564 // Even in checked mode, type annotations for return type and argument | |
| 565 // types do not imply type checks, so there should never be a check | |
| 566 // against the type variable of a typedef. | |
| 567 assert(type.kind != TypeKind.TYPE_VARIABLE || | |
| 568 !type.element.enclosingElement.isTypedef); | |
| 569 } | |
| 570 | |
| 571 /** | |
| 572 * If a factory constructor is used with type arguments, we lose track | |
| 573 * which arguments could be used to create instances of classes that use their | |
| 574 * type variables as expressions, so we have to remember if we saw such a use. | |
| 575 */ | |
| 576 void registerFactoryWithTypeArguments(Registry registry) { | |
| 577 universe.usingFactoryWithTypeArguments = true; | |
| 578 } | |
| 579 | |
| 580 void registerCallMethodWithFreeTypeVariables( | |
| 581 Element element, | |
| 582 Registry registry) { | |
| 583 compiler.backend.registerCallMethodWithFreeTypeVariables( | |
| 584 element, this, registry); | |
| 585 universe.callMethodsWithFreeTypeVariables.add(element); | |
| 586 } | |
| 587 | |
| 588 void registerClosurizedMember(Element element, Registry registry) { | |
| 589 assert(element.isInstanceMember); | |
| 590 registerClosureIfFreeTypeVariables(element, registry); | |
| 591 compiler.backend.registerBoundClosure(this); | |
| 592 universe.closurizedMembers.add(element); | |
| 593 } | |
| 594 | |
| 595 void registerClosureIfFreeTypeVariables(Element element, Registry registry) { | |
| 596 if (element.computeType(compiler).containsTypeVariables) { | |
| 597 compiler.backend.registerClosureWithFreeTypeVariables( | |
| 598 element, this, registry); | |
| 599 universe.closuresWithFreeTypeVariables.add(element); | |
| 600 } | |
| 601 } | |
| 602 | |
| 603 void registerClosure(LocalFunctionElement element, Registry registry) { | |
| 604 universe.allClosures.add(element); | |
| 605 registerClosureIfFreeTypeVariables(element, registry); | |
| 606 } | |
| 607 | |
| 608 void forEach(void f(WorkItem work)) { | |
| 609 do { | |
| 610 while (queue.isNotEmpty) { | |
| 611 // TODO(johnniwinther): Find an optimal process order. | |
| 612 filter.processWorkItem(f, queue.removeLast()); | |
| 613 } | |
| 614 List recents = recentClasses.toList(growable: false); | |
| 615 recentClasses.clear(); | |
| 616 if (!onQueueEmpty(recents)) recentClasses.addAll(recents); | |
| 617 } while (queue.isNotEmpty || recentClasses.isNotEmpty); | |
| 618 } | |
| 619 | |
| 620 /// [onQueueEmpty] is called whenever the queue is drained. [recentClasses] | |
| 621 /// contains the set of all classes seen for the first time since | |
| 622 /// [onQueueEmpty] was called last. A return value of [true] indicates that | |
| 623 /// the [recentClasses] have been processed and may be cleared. If [false] is | |
| 624 /// returned, [onQueueEmpty] will be called once the queue is empty again (or | |
| 625 /// still empty) and [recentClasses] will be a superset of the current value. | |
| 626 bool onQueueEmpty(Iterable<ClassElement> recentClasses) { | |
| 627 return compiler.backend.onQueueEmpty(this, recentClasses); | |
| 628 } | |
| 629 | |
| 630 void logSummary(log(message)) { | |
| 631 _logSpecificSummary(log); | |
| 632 nativeEnqueuer.logSummary(log); | |
| 633 } | |
| 634 | |
| 635 /// Log summary specific to the concrete enqueuer. | |
| 636 void _logSpecificSummary(log(message)); | |
| 637 | |
| 638 String toString() => 'Enqueuer($name)'; | |
| 639 | |
| 640 void forgetElement(Element element) { | |
| 641 universe.forgetElement(element, compiler); | |
| 642 _processedClasses.remove(element); | |
| 643 } | |
| 644 } | |
| 645 | |
| 646 /// [Enqueuer] which is specific to resolution. | |
| 647 class ResolutionEnqueuer extends Enqueuer { | |
| 648 /** | |
| 649 * Map from declaration elements to the [TreeElements] object holding the | |
| 650 * resolution mapping for the element implementation. | |
| 651 * | |
| 652 * Invariant: Key elements are declaration elements. | |
| 653 */ | |
| 654 final Set<AstElement> resolvedElements; | |
| 655 | |
| 656 final Queue<ResolutionWorkItem> queue; | |
| 657 | |
| 658 /** | |
| 659 * A deferred task queue for the resolution phase which is processed | |
| 660 * when the resolution queue has been emptied. | |
| 661 */ | |
| 662 final Queue<DeferredTask> deferredTaskQueue; | |
| 663 | |
| 664 ResolutionEnqueuer(Compiler compiler, | |
| 665 ItemCompilationContext itemCompilationContextCreator()) | |
| 666 : super('resolution enqueuer', compiler, itemCompilationContextCreator), | |
| 667 resolvedElements = new Set<AstElement>(), | |
| 668 queue = new Queue<ResolutionWorkItem>(), | |
| 669 deferredTaskQueue = new Queue<DeferredTask>(); | |
| 670 | |
| 671 bool get isResolutionQueue => true; | |
| 672 | |
| 673 bool isProcessed(Element member) => resolvedElements.contains(member); | |
| 674 | |
| 675 /// Returns `true` if [element] has been processed by the resolution enqueuer. | |
| 676 bool hasBeenResolved(Element element) { | |
| 677 return resolvedElements.contains(element.analyzableElement.declaration); | |
| 678 } | |
| 679 | |
| 680 /// Registers [element] as resolved for the resolution enqueuer. | |
| 681 void registerResolvedElement(AstElement element) { | |
| 682 resolvedElements.add(element); | |
| 683 } | |
| 684 | |
| 685 /** | |
| 686 * Decides whether an element should be included to satisfy requirements | |
| 687 * of the mirror system. | |
| 688 * | |
| 689 * During resolution, we have to resort to matching elements against the | |
| 690 * [MirrorsUsed] pattern, as we do not have a complete picture of the world, | |
| 691 * yet. | |
| 692 */ | |
| 693 bool shouldIncludeElementDueToMirrors(Element element, | |
| 694 {bool includedEnclosing}) { | |
| 695 return includedEnclosing || compiler.backend.requiredByMirrorSystem(element)
; | |
| 696 } | |
| 697 | |
| 698 bool internalAddToWorkList(Element element) { | |
| 699 assert(invariant(element, element is AnalyzableElement, | |
| 700 message: 'Element $element is not analyzable.')); | |
| 701 if (hasBeenResolved(element)) return false; | |
| 702 if (queueIsClosed) { | |
| 703 throw new SpannableAssertionFailure(element, | |
| 704 "Resolution work list is closed. Trying to add $element."); | |
| 705 } | |
| 706 | |
| 707 compiler.world.registerUsedElement(element); | |
| 708 | |
| 709 queue.add(new ResolutionWorkItem(element, itemCompilationContextCreator())); | |
| 710 | |
| 711 // Enable isolate support if we start using something from the isolate | |
| 712 // library, or timers for the async library. We exclude constant fields, | |
| 713 // which are ending here because their initializing expression is compiled. | |
| 714 LibraryElement library = element.library; | |
| 715 if (!compiler.hasIsolateSupport && | |
| 716 (!element.isField || !element.isConst)) { | |
| 717 String uri = library.canonicalUri.toString(); | |
| 718 if (uri == 'dart:isolate') { | |
| 719 enableIsolateSupport(); | |
| 720 } else if (uri == 'dart:async') { | |
| 721 if (element.name == '_createTimer' || | |
| 722 element.name == '_createPeriodicTimer') { | |
| 723 // The [:Timer:] class uses the event queue of the isolate | |
| 724 // library, so we make sure that event queue is generated. | |
| 725 enableIsolateSupport(); | |
| 726 } | |
| 727 } | |
| 728 } | |
| 729 | |
| 730 if (element.isGetter && element.name == Compiler.RUNTIME_TYPE) { | |
| 731 // Enable runtime type support if we discover a getter called runtimeType. | |
| 732 // We have to enable runtime type before hitting the codegen, so | |
| 733 // that constructors know whether they need to generate code for | |
| 734 // runtime type. | |
| 735 compiler.enabledRuntimeType = true; | |
| 736 // TODO(ahe): Record precise dependency here. | |
| 737 compiler.backend.registerRuntimeType(this, compiler.globalDependencies); | |
| 738 } else if (element == compiler.functionApplyMethod) { | |
| 739 compiler.enabledFunctionApply = true; | |
| 740 } | |
| 741 | |
| 742 nativeEnqueuer.registerElement(element); | |
| 743 return true; | |
| 744 } | |
| 745 | |
| 746 void enableIsolateSupport() { | |
| 747 compiler.hasIsolateSupport = true; | |
| 748 compiler.backend.enableIsolateSupport(this); | |
| 749 } | |
| 750 | |
| 751 void enableNoSuchMethod(Element element) { | |
| 752 if (compiler.enabledNoSuchMethod) return; | |
| 753 if (compiler.backend.isDefaultNoSuchMethodImplementation(element)) return; | |
| 754 | |
| 755 compiler.enabledNoSuchMethod = true; | |
| 756 compiler.backend.enableNoSuchMethod(element, this); | |
| 757 } | |
| 758 | |
| 759 /** | |
| 760 * Adds an action to the deferred task queue. | |
| 761 * | |
| 762 * The action is performed the next time the resolution queue has been | |
| 763 * emptied. | |
| 764 * | |
| 765 * The queue is processed in FIFO order. | |
| 766 */ | |
| 767 void addDeferredAction(Element element, DeferredAction action) { | |
| 768 if (queueIsClosed) { | |
| 769 throw new SpannableAssertionFailure(element, | |
| 770 "Resolution work list is closed. " | |
| 771 "Trying to add deferred action for $element"); | |
| 772 } | |
| 773 deferredTaskQueue.add(new DeferredTask(element, action)); | |
| 774 } | |
| 775 | |
| 776 bool onQueueEmpty(Iterable<ClassElement> recentClasses) { | |
| 777 emptyDeferredTaskQueue(); | |
| 778 return super.onQueueEmpty(recentClasses); | |
| 779 } | |
| 780 | |
| 781 void emptyDeferredTaskQueue() { | |
| 782 while (!deferredTaskQueue.isEmpty) { | |
| 783 DeferredTask task = deferredTaskQueue.removeFirst(); | |
| 784 compiler.withCurrentElement(task.element, task.action); | |
| 785 } | |
| 786 } | |
| 787 | |
| 788 void registerJsCall(Send node, ResolverVisitor resolver) { | |
| 789 nativeEnqueuer.registerJsCall(node, resolver); | |
| 790 } | |
| 791 | |
| 792 void registerJsEmbeddedGlobalCall(Send node, ResolverVisitor resolver) { | |
| 793 nativeEnqueuer.registerJsEmbeddedGlobalCall(node, resolver); | |
| 794 } | |
| 795 | |
| 796 void _logSpecificSummary(log(message)) { | |
| 797 log('Resolved ${resolvedElements.length} elements.'); | |
| 798 } | |
| 799 | |
| 800 void forgetElement(Element element) { | |
| 801 super.forgetElement(element); | |
| 802 resolvedElements.remove(element); | |
| 803 } | |
| 804 } | |
| 805 | |
| 806 /// [Enqueuer] which is specific to code generation. | |
| 807 class CodegenEnqueuer extends Enqueuer { | |
| 808 final Queue<CodegenWorkItem> queue; | |
| 809 final Map<Element, js.Expression> generatedCode = | |
| 810 new Map<Element, js.Expression>(); | |
| 811 | |
| 812 final Set<Element> newlyEnqueuedElements; | |
| 813 | |
| 814 CodegenEnqueuer(Compiler compiler, | |
| 815 ItemCompilationContext itemCompilationContextCreator()) | |
| 816 : queue = new Queue<CodegenWorkItem>(), | |
| 817 newlyEnqueuedElements = compiler.cacheStrategy.newSet(), | |
| 818 super('codegen enqueuer', compiler, itemCompilationContextCreator); | |
| 819 | |
| 820 bool isProcessed(Element member) => | |
| 821 member.isAbstract || generatedCode.containsKey(member); | |
| 822 | |
| 823 /** | |
| 824 * Decides whether an element should be included to satisfy requirements | |
| 825 * of the mirror system. | |
| 826 * | |
| 827 * For code generation, we rely on the precomputed set of elements that takes | |
| 828 * subtyping constraints into account. | |
| 829 */ | |
| 830 bool shouldIncludeElementDueToMirrors(Element element, | |
| 831 {bool includedEnclosing}) { | |
| 832 return compiler.backend.isAccessibleByReflection(element); | |
| 833 } | |
| 834 | |
| 835 bool internalAddToWorkList(Element element) { | |
| 836 // Don't generate code for foreign elements. | |
| 837 if (element.isForeign(compiler.backend)) return false; | |
| 838 | |
| 839 // Codegen inlines field initializers. It only needs to generate | |
| 840 // code for checked setters. | |
| 841 if (element.isField && element.isInstanceMember) { | |
| 842 if (!compiler.enableTypeAssertions | |
| 843 || element.enclosingElement.isClosure) { | |
| 844 return false; | |
| 845 } | |
| 846 } | |
| 847 | |
| 848 if (compiler.hasIncrementalSupport && !isProcessed(element)) { | |
| 849 newlyEnqueuedElements.add(element); | |
| 850 } | |
| 851 | |
| 852 if (queueIsClosed) { | |
| 853 throw new SpannableAssertionFailure(element, | |
| 854 "Codegen work list is closed. Trying to add $element"); | |
| 855 } | |
| 856 CodegenWorkItem workItem = new CodegenWorkItem( | |
| 857 element, itemCompilationContextCreator()); | |
| 858 queue.add(workItem); | |
| 859 return true; | |
| 860 } | |
| 861 | |
| 862 void _logSpecificSummary(log(message)) { | |
| 863 log('Compiled ${generatedCode.length} methods.'); | |
| 864 } | |
| 865 | |
| 866 void forgetElement(Element element) { | |
| 867 super.forgetElement(element); | |
| 868 generatedCode.remove(element); | |
| 869 if (element is MemberElement) { | |
| 870 for (Element closure in element.nestedClosures) { | |
| 871 generatedCode.remove(closure); | |
| 872 removeFromSet(instanceMembersByName, closure); | |
| 873 removeFromSet(instanceFunctionsByName, closure); | |
| 874 } | |
| 875 } | |
| 876 } | |
| 877 } | |
| 878 | |
| 879 /// Parameterizes filtering of which work items are enqueued. | |
| 880 class QueueFilter { | |
| 881 bool checkNoEnqueuedInvokedInstanceMethods(Enqueuer enqueuer) { | |
| 882 enqueuer.task.measure(() { | |
| 883 // Run through the classes and see if we need to compile methods. | |
| 884 for (ClassElement classElement in | |
| 885 enqueuer.universe.directlyInstantiatedClasses) { | |
| 886 for (ClassElement currentClass = classElement; | |
| 887 currentClass != null; | |
| 888 currentClass = currentClass.superclass) { | |
| 889 enqueuer.processInstantiatedClassMembers(currentClass); | |
| 890 } | |
| 891 } | |
| 892 }); | |
| 893 return true; | |
| 894 } | |
| 895 | |
| 896 void processWorkItem(void f(WorkItem work), WorkItem work) { | |
| 897 f(work); | |
| 898 } | |
| 899 } | |
| 900 | |
| 901 void removeFromSet(Map<String, Set<Element>> map, Element element) { | |
| 902 Set<Element> set = map[element.name]; | |
| 903 if (set == null) return; | |
| 904 set.remove(element); | |
| 905 } | |
| OLD | NEW |
|---|
Chromium Code Reviews
Issue 694353007:
Move dart2js from sdk/lib/_internal/compiler to pkg/compiler (Closed)
Base URL: https://dart.googlecode.com/svn/branches/bleeding_edge/dart