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1 // Copyright 2012 the V8 project authors. All rights reserved. | 1 // Copyright 2012 the V8 project authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #ifndef V8_CONTEXTS_H_ | 5 #ifndef V8_CONTEXTS_H_ |
6 #define V8_CONTEXTS_H_ | 6 #define V8_CONTEXTS_H_ |
7 | 7 |
8 #include "src/heap.h" | 8 #include "src/heap.h" |
9 #include "src/objects.h" | 9 #include "src/objects.h" |
10 | 10 |
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174 V(NATIVE_OBJECT_OBSERVE_INDEX, JSFunction, native_object_observe) \ | 174 V(NATIVE_OBJECT_OBSERVE_INDEX, JSFunction, native_object_observe) \ |
175 V(NATIVE_OBJECT_GET_NOTIFIER_INDEX, JSFunction, native_object_get_notifier) \ | 175 V(NATIVE_OBJECT_GET_NOTIFIER_INDEX, JSFunction, native_object_get_notifier) \ |
176 V(NATIVE_OBJECT_NOTIFIER_PERFORM_CHANGE, JSFunction, \ | 176 V(NATIVE_OBJECT_NOTIFIER_PERFORM_CHANGE, JSFunction, \ |
177 native_object_notifier_perform_change) \ | 177 native_object_notifier_perform_change) \ |
178 V(SLOPPY_GENERATOR_FUNCTION_MAP_INDEX, Map, sloppy_generator_function_map) \ | 178 V(SLOPPY_GENERATOR_FUNCTION_MAP_INDEX, Map, sloppy_generator_function_map) \ |
179 V(STRICT_GENERATOR_FUNCTION_MAP_INDEX, Map, strict_generator_function_map) \ | 179 V(STRICT_GENERATOR_FUNCTION_MAP_INDEX, Map, strict_generator_function_map) \ |
180 V(GENERATOR_OBJECT_PROTOTYPE_MAP_INDEX, Map, generator_object_prototype_map) \ | 180 V(GENERATOR_OBJECT_PROTOTYPE_MAP_INDEX, Map, generator_object_prototype_map) \ |
181 V(ITERATOR_RESULT_MAP_INDEX, Map, iterator_result_map) \ | 181 V(ITERATOR_RESULT_MAP_INDEX, Map, iterator_result_map) \ |
182 V(MAP_ITERATOR_MAP_INDEX, Map, map_iterator_map) \ | 182 V(MAP_ITERATOR_MAP_INDEX, Map, map_iterator_map) \ |
183 V(SET_ITERATOR_MAP_INDEX, Map, set_iterator_map) \ | 183 V(SET_ITERATOR_MAP_INDEX, Map, set_iterator_map) \ |
184 V(ITERATOR_SYMBOL_INDEX, Symbol, iterator_symbol) | 184 V(ITERATOR_SYMBOL_INDEX, Symbol, iterator_symbol) \ |
| 185 V(UNSCOPABLES_SYMBOL_INDEX, Symbol, unscopables_symbol) |
185 | 186 |
186 // JSFunctions are pairs (context, function code), sometimes also called | 187 // JSFunctions are pairs (context, function code), sometimes also called |
187 // closures. A Context object is used to represent function contexts and | 188 // closures. A Context object is used to represent function contexts and |
188 // dynamically pushed 'with' contexts (or 'scopes' in ECMA-262 speak). | 189 // dynamically pushed 'with' contexts (or 'scopes' in ECMA-262 speak). |
189 // | 190 // |
190 // At runtime, the contexts build a stack in parallel to the execution | 191 // At runtime, the contexts build a stack in parallel to the execution |
191 // stack, with the top-most context being the current context. All contexts | 192 // stack, with the top-most context being the current context. All contexts |
192 // have the following slots: | 193 // have the following slots: |
193 // | 194 // |
194 // [ closure ] This is the current function. It is the same for all | 195 // [ closure ] This is the current function. It is the same for all |
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349 NATIVE_OBJECT_OBSERVE_INDEX, | 350 NATIVE_OBJECT_OBSERVE_INDEX, |
350 NATIVE_OBJECT_GET_NOTIFIER_INDEX, | 351 NATIVE_OBJECT_GET_NOTIFIER_INDEX, |
351 NATIVE_OBJECT_NOTIFIER_PERFORM_CHANGE, | 352 NATIVE_OBJECT_NOTIFIER_PERFORM_CHANGE, |
352 SLOPPY_GENERATOR_FUNCTION_MAP_INDEX, | 353 SLOPPY_GENERATOR_FUNCTION_MAP_INDEX, |
353 STRICT_GENERATOR_FUNCTION_MAP_INDEX, | 354 STRICT_GENERATOR_FUNCTION_MAP_INDEX, |
354 GENERATOR_OBJECT_PROTOTYPE_MAP_INDEX, | 355 GENERATOR_OBJECT_PROTOTYPE_MAP_INDEX, |
355 ITERATOR_RESULT_MAP_INDEX, | 356 ITERATOR_RESULT_MAP_INDEX, |
356 MAP_ITERATOR_MAP_INDEX, | 357 MAP_ITERATOR_MAP_INDEX, |
357 SET_ITERATOR_MAP_INDEX, | 358 SET_ITERATOR_MAP_INDEX, |
358 ITERATOR_SYMBOL_INDEX, | 359 ITERATOR_SYMBOL_INDEX, |
| 360 UNSCOPABLES_SYMBOL_INDEX, |
359 | 361 |
360 // Properties from here are treated as weak references by the full GC. | 362 // Properties from here are treated as weak references by the full GC. |
361 // Scavenge treats them as strong references. | 363 // Scavenge treats them as strong references. |
362 OPTIMIZED_FUNCTIONS_LIST, // Weak. | 364 OPTIMIZED_FUNCTIONS_LIST, // Weak. |
363 OPTIMIZED_CODE_LIST, // Weak. | 365 OPTIMIZED_CODE_LIST, // Weak. |
364 DEOPTIMIZED_CODE_LIST, // Weak. | 366 DEOPTIMIZED_CODE_LIST, // Weak. |
365 MAP_CACHE_INDEX, // Weak. | 367 MAP_CACHE_INDEX, // Weak. |
366 NEXT_CONTEXT_LINK, // Weak. | 368 NEXT_CONTEXT_LINK, // Weak. |
367 | 369 |
368 // Total number of slots. | 370 // Total number of slots. |
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542 static bool IsBootstrappingOrGlobalObject(Isolate* isolate, Object* object); | 544 static bool IsBootstrappingOrGlobalObject(Isolate* isolate, Object* object); |
543 #endif | 545 #endif |
544 | 546 |
545 STATIC_ASSERT(kHeaderSize == Internals::kContextHeaderSize); | 547 STATIC_ASSERT(kHeaderSize == Internals::kContextHeaderSize); |
546 STATIC_ASSERT(EMBEDDER_DATA_INDEX == Internals::kContextEmbedderDataIndex); | 548 STATIC_ASSERT(EMBEDDER_DATA_INDEX == Internals::kContextEmbedderDataIndex); |
547 }; | 549 }; |
548 | 550 |
549 } } // namespace v8::internal | 551 } } // namespace v8::internal |
550 | 552 |
551 #endif // V8_CONTEXTS_H_ | 553 #endif // V8_CONTEXTS_H_ |
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