Line data Source code
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
3 : // found in the LICENSE file.
4 :
5 : #ifndef V8_CONTEXTS_H_
6 : #define V8_CONTEXTS_H_
7 :
8 : #include "src/objects.h"
9 :
10 : namespace v8 {
11 : namespace internal {
12 :
13 : class RegExpMatchInfo;
14 :
15 : enum ContextLookupFlags {
16 : FOLLOW_CONTEXT_CHAIN = 1 << 0,
17 : FOLLOW_PROTOTYPE_CHAIN = 1 << 1,
18 : STOP_AT_DECLARATION_SCOPE = 1 << 2,
19 : SKIP_WITH_CONTEXT = 1 << 3,
20 :
21 : DONT_FOLLOW_CHAINS = 0,
22 : FOLLOW_CHAINS = FOLLOW_CONTEXT_CHAIN | FOLLOW_PROTOTYPE_CHAIN,
23 : };
24 :
25 :
26 : // Heap-allocated activation contexts.
27 : //
28 : // Contexts are implemented as FixedArray objects; the Context
29 : // class is a convenience interface casted on a FixedArray object.
30 : //
31 : // Note: Context must have no virtual functions and Context objects
32 : // must always be allocated via Heap::AllocateContext() or
33 : // Factory::NewContext.
34 :
35 : #define NATIVE_CONTEXT_INTRINSIC_FUNCTIONS(V) \
36 : V(ASYNC_FUNCTION_AWAIT_CAUGHT_INDEX, JSFunction, \
37 : async_function_await_caught) \
38 : V(ASYNC_FUNCTION_AWAIT_UNCAUGHT_INDEX, JSFunction, \
39 : async_function_await_uncaught) \
40 : V(ASYNC_FUNCTION_PROMISE_CREATE_INDEX, JSFunction, \
41 : async_function_promise_create) \
42 : V(ASYNC_FUNCTION_PROMISE_RELEASE_INDEX, JSFunction, \
43 : async_function_promise_release) \
44 : V(IS_ARRAYLIKE, JSFunction, is_arraylike) \
45 : V(GENERATOR_NEXT_INTERNAL, JSFunction, generator_next_internal) \
46 : V(MAKE_ERROR_INDEX, JSFunction, make_error) \
47 : V(MAKE_RANGE_ERROR_INDEX, JSFunction, make_range_error) \
48 : V(MAKE_SYNTAX_ERROR_INDEX, JSFunction, make_syntax_error) \
49 : V(MAKE_TYPE_ERROR_INDEX, JSFunction, make_type_error) \
50 : V(MAKE_URI_ERROR_INDEX, JSFunction, make_uri_error) \
51 : V(OBJECT_CREATE, JSFunction, object_create) \
52 : V(OBJECT_DEFINE_PROPERTIES, JSFunction, object_define_properties) \
53 : V(OBJECT_DEFINE_PROPERTY, JSFunction, object_define_property) \
54 : V(OBJECT_GET_PROTOTYPE_OF, JSFunction, object_get_prototype_of) \
55 : V(OBJECT_IS_EXTENSIBLE, JSFunction, object_is_extensible) \
56 : V(OBJECT_IS_FROZEN, JSFunction, object_is_frozen) \
57 : V(OBJECT_IS_SEALED, JSFunction, object_is_sealed) \
58 : V(OBJECT_KEYS, JSFunction, object_keys) \
59 : V(REGEXP_INTERNAL_MATCH, JSFunction, regexp_internal_match) \
60 : V(REFLECT_APPLY_INDEX, JSFunction, reflect_apply) \
61 : V(REFLECT_CONSTRUCT_INDEX, JSFunction, reflect_construct) \
62 : V(REFLECT_DEFINE_PROPERTY_INDEX, JSFunction, reflect_define_property) \
63 : V(REFLECT_DELETE_PROPERTY_INDEX, JSFunction, reflect_delete_property) \
64 : V(SPREAD_ARGUMENTS_INDEX, JSFunction, spread_arguments) \
65 : V(SPREAD_ITERABLE_INDEX, JSFunction, spread_iterable) \
66 : V(TYPED_ARRAY_CONSTRUCT_BY_ARRAY_BUFFER_INDEX, JSFunction, \
67 : typed_array_construct_by_array_buffer) \
68 : V(TYPED_ARRAY_CONSTRUCT_BY_ARRAY_LIKE_INDEX, JSFunction, \
69 : typed_array_construct_by_array_like) \
70 : V(TYPED_ARRAY_CONSTRUCT_BY_LENGTH_INDEX, JSFunction, \
71 : typed_array_construct_by_length) \
72 : V(MATH_FLOOR_INDEX, JSFunction, math_floor) \
73 : V(MATH_POW_INDEX, JSFunction, math_pow) \
74 : V(NEW_PROMISE_CAPABILITY_INDEX, JSFunction, new_promise_capability) \
75 : V(PROMISE_INTERNAL_CONSTRUCTOR_INDEX, JSFunction, \
76 : promise_internal_constructor) \
77 : V(PROMISE_INTERNAL_REJECT_INDEX, JSFunction, promise_internal_reject) \
78 : V(IS_PROMISE_INDEX, JSFunction, is_promise) \
79 : V(PROMISE_RESOLVE_INDEX, JSFunction, promise_resolve) \
80 : V(PROMISE_THEN_INDEX, JSFunction, promise_then) \
81 : V(PROMISE_HANDLE_INDEX, JSFunction, promise_handle) \
82 : V(PROMISE_HANDLE_REJECT_INDEX, JSFunction, promise_handle_reject) \
83 : V(ASYNC_GENERATOR_AWAIT_CAUGHT, JSFunction, async_generator_await_caught) \
84 : V(ASYNC_GENERATOR_AWAIT_UNCAUGHT, JSFunction, async_generator_await_uncaught)
85 :
86 : #define NATIVE_CONTEXT_IMPORTED_FIELDS(V) \
87 : V(ARRAY_CONCAT_INDEX, JSFunction, array_concat) \
88 : V(ARRAY_POP_INDEX, JSFunction, array_pop) \
89 : V(ARRAY_PUSH_INDEX, JSFunction, array_push) \
90 : V(ARRAY_SHIFT_INDEX, JSFunction, array_shift) \
91 : V(ARRAY_SPLICE_INDEX, JSFunction, array_splice) \
92 : V(ARRAY_SLICE_INDEX, JSFunction, array_slice) \
93 : V(ARRAY_UNSHIFT_INDEX, JSFunction, array_unshift) \
94 : V(ARRAY_ENTRIES_ITERATOR_INDEX, JSFunction, array_entries_iterator) \
95 : V(ARRAY_FOR_EACH_ITERATOR_INDEX, JSFunction, array_for_each_iterator) \
96 : V(ARRAY_KEYS_ITERATOR_INDEX, JSFunction, array_keys_iterator) \
97 : V(ARRAY_VALUES_ITERATOR_INDEX, JSFunction, array_values_iterator) \
98 : V(DERIVED_GET_TRAP_INDEX, JSFunction, derived_get_trap) \
99 : V(ERROR_FUNCTION_INDEX, JSFunction, error_function) \
100 : V(ERROR_TO_STRING, JSFunction, error_to_string) \
101 : V(EVAL_ERROR_FUNCTION_INDEX, JSFunction, eval_error_function) \
102 : V(GLOBAL_EVAL_FUN_INDEX, JSFunction, global_eval_fun) \
103 : V(GLOBAL_PROXY_FUNCTION_INDEX, JSFunction, global_proxy_function) \
104 : V(MAP_DELETE_INDEX, JSFunction, map_delete) \
105 : V(MAP_GET_INDEX, JSFunction, map_get) \
106 : V(MAP_HAS_INDEX, JSFunction, map_has) \
107 : V(MAP_SET_INDEX, JSFunction, map_set) \
108 : V(FUNCTION_HAS_INSTANCE_INDEX, JSFunction, function_has_instance) \
109 : V(OBJECT_VALUE_OF, JSFunction, object_value_of) \
110 : V(OBJECT_TO_STRING, JSFunction, object_to_string) \
111 : V(PROMISE_CATCH_INDEX, JSFunction, promise_catch) \
112 : V(PROMISE_FUNCTION_INDEX, JSFunction, promise_function) \
113 : V(RANGE_ERROR_FUNCTION_INDEX, JSFunction, range_error_function) \
114 : V(REFERENCE_ERROR_FUNCTION_INDEX, JSFunction, reference_error_function) \
115 : V(SET_ADD_INDEX, JSFunction, set_add) \
116 : V(SET_DELETE_INDEX, JSFunction, set_delete) \
117 : V(SET_HAS_INDEX, JSFunction, set_has) \
118 : V(SYNTAX_ERROR_FUNCTION_INDEX, JSFunction, syntax_error_function) \
119 : V(TYPE_ERROR_FUNCTION_INDEX, JSFunction, type_error_function) \
120 : V(URI_ERROR_FUNCTION_INDEX, JSFunction, uri_error_function) \
121 : V(WASM_COMPILE_ERROR_FUNCTION_INDEX, JSFunction, \
122 : wasm_compile_error_function) \
123 : V(WASM_LINK_ERROR_FUNCTION_INDEX, JSFunction, wasm_link_error_function) \
124 : V(WASM_RUNTIME_ERROR_FUNCTION_INDEX, JSFunction, wasm_runtime_error_function)
125 :
126 : #define NATIVE_CONTEXT_JS_ARRAY_ITERATOR_MAPS(V) \
127 : V(TYPED_ARRAY_KEY_ITERATOR_MAP_INDEX, Map, typed_array_key_iterator_map) \
128 : V(FAST_ARRAY_KEY_ITERATOR_MAP_INDEX, Map, fast_array_key_iterator_map) \
129 : V(GENERIC_ARRAY_KEY_ITERATOR_MAP_INDEX, Map, array_key_iterator_map) \
130 : \
131 : V(UINT8_ARRAY_KEY_VALUE_ITERATOR_MAP_INDEX, Map, \
132 : uint8_array_key_value_iterator_map) \
133 : V(INT8_ARRAY_KEY_VALUE_ITERATOR_MAP_INDEX, Map, \
134 : int8_array_key_value_iterator_map) \
135 : V(UINT16_ARRAY_KEY_VALUE_ITERATOR_MAP_INDEX, Map, \
136 : uint16_array_key_value_iterator_map) \
137 : V(INT16_ARRAY_KEY_VALUE_ITERATOR_MAP_INDEX, Map, \
138 : int16_array_key_value_iterator_map) \
139 : V(UINT32_ARRAY_KEY_VALUE_ITERATOR_MAP_INDEX, Map, \
140 : uint32_array_key_value_iterator_map) \
141 : V(INT32_ARRAY_KEY_VALUE_ITERATOR_MAP_INDEX, Map, \
142 : int32_array_key_value_iterator_map) \
143 : V(FLOAT32_ARRAY_KEY_VALUE_ITERATOR_MAP_INDEX, Map, \
144 : float32_array_key_value_iterator_map) \
145 : V(FLOAT64_ARRAY_KEY_VALUE_ITERATOR_MAP_INDEX, Map, \
146 : float64_array_key_value_iterator_map) \
147 : V(UINT8_CLAMPED_ARRAY_KEY_VALUE_ITERATOR_MAP_INDEX, Map, \
148 : uint8_clamped_array_key_value_iterator_map) \
149 : \
150 : V(FAST_SMI_ARRAY_KEY_VALUE_ITERATOR_MAP_INDEX, Map, \
151 : fast_smi_array_key_value_iterator_map) \
152 : V(FAST_HOLEY_SMI_ARRAY_KEY_VALUE_ITERATOR_MAP_INDEX, Map, \
153 : fast_holey_smi_array_key_value_iterator_map) \
154 : V(FAST_ARRAY_KEY_VALUE_ITERATOR_MAP_INDEX, Map, \
155 : fast_array_key_value_iterator_map) \
156 : V(FAST_HOLEY_ARRAY_KEY_VALUE_ITERATOR_MAP_INDEX, Map, \
157 : fast_holey_array_key_value_iterator_map) \
158 : V(FAST_DOUBLE_ARRAY_KEY_VALUE_ITERATOR_MAP_INDEX, Map, \
159 : fast_double_array_key_value_iterator_map) \
160 : V(FAST_HOLEY_DOUBLE_ARRAY_KEY_VALUE_ITERATOR_MAP_INDEX, Map, \
161 : fast_holey_double_array_key_value_iterator_map) \
162 : V(GENERIC_ARRAY_KEY_VALUE_ITERATOR_MAP_INDEX, Map, \
163 : array_key_value_iterator_map) \
164 : \
165 : V(UINT8_ARRAY_VALUE_ITERATOR_MAP_INDEX, Map, uint8_array_value_iterator_map) \
166 : V(INT8_ARRAY_VALUE_ITERATOR_MAP_INDEX, Map, int8_array_value_iterator_map) \
167 : V(UINT16_ARRAY_VALUE_ITERATOR_MAP_INDEX, Map, \
168 : uint16_array_value_iterator_map) \
169 : V(INT16_ARRAY_VALUE_ITERATOR_MAP_INDEX, Map, int16_array_value_iterator_map) \
170 : V(UINT32_ARRAY_VALUE_ITERATOR_MAP_INDEX, Map, \
171 : uint32_array_value_iterator_map) \
172 : V(INT32_ARRAY_VALUE_ITERATOR_MAP_INDEX, Map, int32_array_value_iterator_map) \
173 : V(FLOAT32_ARRAY_VALUE_ITERATOR_MAP_INDEX, Map, \
174 : float32_array_value_iterator_map) \
175 : V(FLOAT64_ARRAY_VALUE_ITERATOR_MAP_INDEX, Map, \
176 : float64_array_value_iterator_map) \
177 : V(UINT8_CLAMPED_ARRAY_VALUE_ITERATOR_MAP_INDEX, Map, \
178 : uint8_clamped_array_value_iterator_map) \
179 : \
180 : V(FAST_SMI_ARRAY_VALUE_ITERATOR_MAP_INDEX, Map, \
181 : fast_smi_array_value_iterator_map) \
182 : V(FAST_HOLEY_SMI_ARRAY_VALUE_ITERATOR_MAP_INDEX, Map, \
183 : fast_holey_smi_array_value_iterator_map) \
184 : V(FAST_ARRAY_VALUE_ITERATOR_MAP_INDEX, Map, fast_array_value_iterator_map) \
185 : V(FAST_HOLEY_ARRAY_VALUE_ITERATOR_MAP_INDEX, Map, \
186 : fast_holey_array_value_iterator_map) \
187 : V(FAST_DOUBLE_ARRAY_VALUE_ITERATOR_MAP_INDEX, Map, \
188 : fast_double_array_value_iterator_map) \
189 : V(FAST_HOLEY_DOUBLE_ARRAY_VALUE_ITERATOR_MAP_INDEX, Map, \
190 : fast_holey_double_array_value_iterator_map) \
191 : V(GENERIC_ARRAY_VALUE_ITERATOR_MAP_INDEX, Map, array_value_iterator_map)
192 :
193 : #define NATIVE_CONTEXT_FIELDS(V) \
194 : V(GLOBAL_PROXY_INDEX, JSObject, global_proxy_object) \
195 : V(EMBEDDER_DATA_INDEX, FixedArray, embedder_data) \
196 : /* Below is alpha-sorted */ \
197 : V(ACCESSOR_PROPERTY_DESCRIPTOR_MAP_INDEX, Map, \
198 : accessor_property_descriptor_map) \
199 : V(ALLOW_CODE_GEN_FROM_STRINGS_INDEX, Object, allow_code_gen_from_strings) \
200 : V(ARRAY_BUFFER_FUN_INDEX, JSFunction, array_buffer_fun) \
201 : V(ARRAY_BUFFER_MAP_INDEX, Map, array_buffer_map) \
202 : V(ARRAY_BUFFER_NOINIT_FUN_INDEX, JSFunction, array_buffer_noinit_fun) \
203 : V(ARRAY_FUNCTION_INDEX, JSFunction, array_function) \
204 : V(ASYNC_FROM_SYNC_ITERATOR_MAP_INDEX, Map, async_from_sync_iterator_map) \
205 : V(ASYNC_FUNCTION_AWAIT_REJECT_SHARED_FUN, SharedFunctionInfo, \
206 : async_function_await_reject_shared_fun) \
207 : V(ASYNC_FUNCTION_AWAIT_RESOLVE_SHARED_FUN, SharedFunctionInfo, \
208 : async_function_await_resolve_shared_fun) \
209 : V(ASYNC_FUNCTION_FUNCTION_INDEX, JSFunction, async_function_constructor) \
210 : V(ASYNC_GENERATOR_FUNCTION_FUNCTION_INDEX, JSFunction, \
211 : async_generator_function_function) \
212 : V(ASYNC_ITERATOR_VALUE_UNWRAP_SHARED_FUN, SharedFunctionInfo, \
213 : async_iterator_value_unwrap_shared_fun) \
214 : V(ASYNC_GENERATOR_AWAIT_REJECT_SHARED_FUN, SharedFunctionInfo, \
215 : async_generator_await_reject_shared_fun) \
216 : V(ASYNC_GENERATOR_AWAIT_RESOLVE_SHARED_FUN, SharedFunctionInfo, \
217 : async_generator_await_resolve_shared_fun) \
218 : V(ASYNC_GENERATOR_YIELD_RESOLVE_SHARED_FUN, SharedFunctionInfo, \
219 : async_generator_yield_resolve_shared_fun) \
220 : V(ASYNC_GENERATOR_RETURN_RESOLVE_SHARED_FUN, SharedFunctionInfo, \
221 : async_generator_return_resolve_shared_fun) \
222 : V(ASYNC_GENERATOR_RETURN_CLOSED_RESOLVE_SHARED_FUN, SharedFunctionInfo, \
223 : async_generator_return_closed_resolve_shared_fun) \
224 : V(ASYNC_GENERATOR_RETURN_CLOSED_REJECT_SHARED_FUN, SharedFunctionInfo, \
225 : async_generator_return_closed_reject_shared_fun) \
226 : V(ATOMICS_OBJECT, JSObject, atomics_object) \
227 : V(BIGINT_FUNCTION_INDEX, JSFunction, bigint_function) \
228 : V(BOOLEAN_FUNCTION_INDEX, JSFunction, boolean_function) \
229 : V(BOUND_FUNCTION_WITH_CONSTRUCTOR_MAP_INDEX, Map, \
230 : bound_function_with_constructor_map) \
231 : V(BOUND_FUNCTION_WITHOUT_CONSTRUCTOR_MAP_INDEX, Map, \
232 : bound_function_without_constructor_map) \
233 : V(CALL_AS_CONSTRUCTOR_DELEGATE_INDEX, JSFunction, \
234 : call_as_constructor_delegate) \
235 : V(CALL_AS_FUNCTION_DELEGATE_INDEX, JSFunction, call_as_function_delegate) \
236 : V(CALLSITE_FUNCTION_INDEX, JSFunction, callsite_function) \
237 : V(CONTEXT_EXTENSION_FUNCTION_INDEX, JSFunction, context_extension_function) \
238 : V(DATA_PROPERTY_DESCRIPTOR_MAP_INDEX, Map, data_property_descriptor_map) \
239 : V(DATA_VIEW_FUN_INDEX, JSFunction, data_view_fun) \
240 : V(DATE_FUNCTION_INDEX, JSFunction, date_function) \
241 : V(DEBUG_CONTEXT_ID_INDEX, Object, debug_context_id) \
242 : V(ERROR_MESSAGE_FOR_CODE_GEN_FROM_STRINGS_INDEX, Object, \
243 : error_message_for_code_gen_from_strings) \
244 : V(ERRORS_THROWN_INDEX, Smi, errors_thrown) \
245 : V(EXTRAS_EXPORTS_OBJECT_INDEX, JSObject, extras_binding_object) \
246 : V(EXTRAS_UTILS_OBJECT_INDEX, Object, extras_utils_object) \
247 : V(FAST_ALIASED_ARGUMENTS_MAP_INDEX, Map, fast_aliased_arguments_map) \
248 : V(FAST_TEMPLATE_INSTANTIATIONS_CACHE_INDEX, FixedArray, \
249 : fast_template_instantiations_cache) \
250 : V(FLOAT32_ARRAY_FUN_INDEX, JSFunction, float32_array_fun) \
251 : V(FLOAT64_ARRAY_FUN_INDEX, JSFunction, float64_array_fun) \
252 : V(FUNCTION_FUNCTION_INDEX, JSFunction, function_function) \
253 : V(GENERATOR_FUNCTION_FUNCTION_INDEX, JSFunction, \
254 : generator_function_function) \
255 : V(GENERATOR_OBJECT_PROTOTYPE_MAP_INDEX, Map, generator_object_prototype_map) \
256 : V(ASYNC_GENERATOR_OBJECT_PROTOTYPE_MAP_INDEX, Map, \
257 : async_generator_object_prototype_map) \
258 : V(INITIAL_ARRAY_ITERATOR_PROTOTYPE_INDEX, JSObject, \
259 : initial_array_iterator_prototype) \
260 : V(INITIAL_ARRAY_ITERATOR_PROTOTYPE_MAP_INDEX, Map, \
261 : initial_array_iterator_prototype_map) \
262 : V(INITIAL_ARRAY_PROTOTYPE_INDEX, JSObject, initial_array_prototype) \
263 : V(INITIAL_ERROR_PROTOTYPE_INDEX, JSObject, initial_error_prototype) \
264 : V(INITIAL_GENERATOR_PROTOTYPE_INDEX, JSObject, initial_generator_prototype) \
265 : V(INITIAL_ASYNC_GENERATOR_PROTOTYPE_INDEX, JSObject, \
266 : initial_async_generator_prototype) \
267 : V(INITIAL_ITERATOR_PROTOTYPE_INDEX, JSObject, initial_iterator_prototype) \
268 : V(INITIAL_OBJECT_PROTOTYPE_INDEX, JSObject, initial_object_prototype) \
269 : V(INT16_ARRAY_FUN_INDEX, JSFunction, int16_array_fun) \
270 : V(INT32_ARRAY_FUN_INDEX, JSFunction, int32_array_fun) \
271 : V(INT8_ARRAY_FUN_INDEX, JSFunction, int8_array_fun) \
272 : V(INTERNAL_ARRAY_FUNCTION_INDEX, JSFunction, internal_array_function) \
273 : V(ITERATOR_RESULT_MAP_INDEX, Map, iterator_result_map) \
274 : V(INTL_DATE_TIME_FORMAT_FUNCTION_INDEX, JSFunction, \
275 : intl_date_time_format_function) \
276 : V(INTL_NUMBER_FORMAT_FUNCTION_INDEX, JSFunction, \
277 : intl_number_format_function) \
278 : V(INTL_COLLATOR_FUNCTION_INDEX, JSFunction, intl_collator_function) \
279 : V(INTL_PLURAL_RULES_FUNCTION_INDEX, JSFunction, intl_plural_rules_function) \
280 : V(INTL_V8_BREAK_ITERATOR_FUNCTION_INDEX, JSFunction, \
281 : intl_v8_break_iterator_function) \
282 : V(JS_ARRAY_PACKED_SMI_ELEMENTS_MAP_INDEX, Map, \
283 : js_array_fast_smi_elements_map_index) \
284 : V(JS_ARRAY_HOLEY_SMI_ELEMENTS_MAP_INDEX, Map, \
285 : js_array_fast_holey_smi_elements_map_index) \
286 : V(JS_ARRAY_PACKED_ELEMENTS_MAP_INDEX, Map, js_array_fast_elements_map_index) \
287 : V(JS_ARRAY_HOLEY_ELEMENTS_MAP_INDEX, Map, \
288 : js_array_fast_holey_elements_map_index) \
289 : V(JS_ARRAY_PACKED_DOUBLE_ELEMENTS_MAP_INDEX, Map, \
290 : js_array_fast_double_elements_map_index) \
291 : V(JS_ARRAY_HOLEY_DOUBLE_ELEMENTS_MAP_INDEX, Map, \
292 : js_array_fast_holey_double_elements_map_index) \
293 : V(JS_MAP_FUN_INDEX, JSFunction, js_map_fun) \
294 : V(JS_MAP_MAP_INDEX, Map, js_map_map) \
295 : V(JS_MODULE_NAMESPACE_MAP, Map, js_module_namespace_map) \
296 : V(JS_SET_FUN_INDEX, JSFunction, js_set_fun) \
297 : V(JS_SET_MAP_INDEX, Map, js_set_map) \
298 : V(JS_WEAK_MAP_FUN_INDEX, JSFunction, js_weak_map_fun) \
299 : V(JS_WEAK_SET_FUN_INDEX, JSFunction, js_weak_set_fun) \
300 : V(MAP_CACHE_INDEX, Object, map_cache) \
301 : V(MAP_KEY_ITERATOR_MAP_INDEX, Map, map_key_iterator_map) \
302 : V(MAP_KEY_VALUE_ITERATOR_MAP_INDEX, Map, map_key_value_iterator_map) \
303 : V(MAP_VALUE_ITERATOR_MAP_INDEX, Map, map_value_iterator_map) \
304 : V(MATH_RANDOM_INDEX_INDEX, Smi, math_random_index) \
305 : V(MATH_RANDOM_CACHE_INDEX, Object, math_random_cache) \
306 : V(MESSAGE_LISTENERS_INDEX, TemplateList, message_listeners) \
307 : V(NATIVES_UTILS_OBJECT_INDEX, Object, natives_utils_object) \
308 : V(NORMALIZED_MAP_CACHE_INDEX, Object, normalized_map_cache) \
309 : V(NUMBER_FUNCTION_INDEX, JSFunction, number_function) \
310 : V(OBJECT_FUNCTION_INDEX, JSFunction, object_function) \
311 : V(OBJECT_FUNCTION_PROTOTYPE_MAP_INDEX, Map, object_function_prototype_map) \
312 : V(OPAQUE_REFERENCE_FUNCTION_INDEX, JSFunction, opaque_reference_function) \
313 : V(PROXY_CALLABLE_MAP_INDEX, Map, proxy_callable_map) \
314 : V(PROXY_CONSTRUCTOR_MAP_INDEX, Map, proxy_constructor_map) \
315 : V(PROXY_FUNCTION_INDEX, JSFunction, proxy_function) \
316 : V(PROXY_MAP_INDEX, Map, proxy_map) \
317 : V(PROMISE_GET_CAPABILITIES_EXECUTOR_SHARED_FUN, SharedFunctionInfo, \
318 : promise_get_capabilities_executor_shared_fun) \
319 : V(PROMISE_RESOLVE_SHARED_FUN, SharedFunctionInfo, \
320 : promise_resolve_shared_fun) \
321 : V(PROMISE_REJECT_SHARED_FUN, SharedFunctionInfo, promise_reject_shared_fun) \
322 : V(PROMISE_THEN_FINALLY_SHARED_FUN, SharedFunctionInfo, \
323 : promise_then_finally_shared_fun) \
324 : V(PROMISE_CATCH_FINALLY_SHARED_FUN, SharedFunctionInfo, \
325 : promise_catch_finally_shared_fun) \
326 : V(PROMISE_VALUE_THUNK_FINALLY_SHARED_FUN, SharedFunctionInfo, \
327 : promise_value_thunk_finally_shared_fun) \
328 : V(PROMISE_THROWER_FINALLY_SHARED_FUN, SharedFunctionInfo, \
329 : promise_thrower_finally_shared_fun) \
330 : V(PROMISE_ALL_RESOLVE_ELEMENT_SHARED_FUN, SharedFunctionInfo, \
331 : promise_all_resolve_element_shared_fun) \
332 : V(PROMISE_PROTOTYPE_MAP_INDEX, Map, promise_prototype_map) \
333 : V(REGEXP_EXEC_FUNCTION_INDEX, JSFunction, regexp_exec_function) \
334 : V(REGEXP_FUNCTION_INDEX, JSFunction, regexp_function) \
335 : V(REGEXP_LAST_MATCH_INFO_INDEX, RegExpMatchInfo, regexp_last_match_info) \
336 : V(REGEXP_INTERNAL_MATCH_INFO_INDEX, RegExpMatchInfo, \
337 : regexp_internal_match_info) \
338 : V(REGEXP_PROTOTYPE_MAP_INDEX, Map, regexp_prototype_map) \
339 : V(REGEXP_RESULT_MAP_INDEX, Map, regexp_result_map) \
340 : V(SCRIPT_CONTEXT_TABLE_INDEX, ScriptContextTable, script_context_table) \
341 : V(SCRIPT_FUNCTION_INDEX, JSFunction, script_function) \
342 : V(SECURITY_TOKEN_INDEX, Object, security_token) \
343 : V(SELF_WEAK_CELL_INDEX, WeakCell, self_weak_cell) \
344 : V(SET_VALUE_ITERATOR_MAP_INDEX, Map, set_value_iterator_map) \
345 : V(SET_KEY_VALUE_ITERATOR_MAP_INDEX, Map, set_key_value_iterator_map) \
346 : V(SHARED_ARRAY_BUFFER_FUN_INDEX, JSFunction, shared_array_buffer_fun) \
347 : V(SLOPPY_ARGUMENTS_MAP_INDEX, Map, sloppy_arguments_map) \
348 : V(SLOW_ALIASED_ARGUMENTS_MAP_INDEX, Map, slow_aliased_arguments_map) \
349 : V(STRICT_ARGUMENTS_MAP_INDEX, Map, strict_arguments_map) \
350 : V(SLOW_OBJECT_WITH_NULL_PROTOTYPE_MAP, Map, \
351 : slow_object_with_null_prototype_map) \
352 : V(SLOW_OBJECT_WITH_OBJECT_PROTOTYPE_MAP, Map, \
353 : slow_object_with_object_prototype_map) \
354 : V(SLOW_TEMPLATE_INSTANTIATIONS_CACHE_INDEX, UnseededNumberDictionary, \
355 : slow_template_instantiations_cache) \
356 : /* All *_FUNCTION_MAP_INDEX definitions used by Context::FunctionMapIndex */ \
357 : /* must remain together. */ \
358 : V(SLOPPY_FUNCTION_MAP_INDEX, Map, sloppy_function_map) \
359 : V(SLOPPY_FUNCTION_WITH_NAME_MAP_INDEX, Map, sloppy_function_with_name_map) \
360 : V(SLOPPY_FUNCTION_WITHOUT_PROTOTYPE_MAP_INDEX, Map, \
361 : sloppy_function_without_prototype_map) \
362 : V(SLOPPY_FUNCTION_WITH_READONLY_PROTOTYPE_MAP_INDEX, Map, \
363 : sloppy_function_with_readonly_prototype_map) \
364 : V(STRICT_FUNCTION_MAP_INDEX, Map, strict_function_map) \
365 : V(STRICT_FUNCTION_WITH_NAME_MAP_INDEX, Map, strict_function_with_name_map) \
366 : V(STRICT_FUNCTION_WITH_READONLY_PROTOTYPE_MAP_INDEX, Map, \
367 : strict_function_with_readonly_prototype_map) \
368 : V(STRICT_FUNCTION_WITHOUT_PROTOTYPE_MAP_INDEX, Map, \
369 : strict_function_without_prototype_map) \
370 : V(METHOD_WITH_NAME_MAP_INDEX, Map, method_with_name_map) \
371 : V(METHOD_WITH_HOME_OBJECT_MAP_INDEX, Map, method_with_home_object_map) \
372 : V(METHOD_WITH_NAME_AND_HOME_OBJECT_MAP_INDEX, Map, \
373 : method_with_name_and_home_object_map) \
374 : V(ASYNC_FUNCTION_MAP_INDEX, Map, async_function_map) \
375 : V(ASYNC_FUNCTION_WITH_NAME_MAP_INDEX, Map, async_function_with_name_map) \
376 : V(ASYNC_FUNCTION_WITH_HOME_OBJECT_MAP_INDEX, Map, \
377 : async_function_with_home_object_map) \
378 : V(ASYNC_FUNCTION_WITH_NAME_AND_HOME_OBJECT_MAP_INDEX, Map, \
379 : async_function_with_name_and_home_object_map) \
380 : V(GENERATOR_FUNCTION_MAP_INDEX, Map, generator_function_map) \
381 : V(GENERATOR_FUNCTION_WITH_NAME_MAP_INDEX, Map, \
382 : generator_function_with_name_map) \
383 : V(GENERATOR_FUNCTION_WITH_HOME_OBJECT_MAP_INDEX, Map, \
384 : generator_function_with_home_object_map) \
385 : V(GENERATOR_FUNCTION_WITH_NAME_AND_HOME_OBJECT_MAP_INDEX, Map, \
386 : generator_function_with_name_and_home_object_map) \
387 : V(ASYNC_GENERATOR_FUNCTION_MAP_INDEX, Map, async_generator_function_map) \
388 : V(ASYNC_GENERATOR_FUNCTION_WITH_NAME_MAP_INDEX, Map, \
389 : async_generator_function_with_name_map) \
390 : V(ASYNC_GENERATOR_FUNCTION_WITH_HOME_OBJECT_MAP_INDEX, Map, \
391 : async_generator_function_with_home_object_map) \
392 : V(ASYNC_GENERATOR_FUNCTION_WITH_NAME_AND_HOME_OBJECT_MAP_INDEX, Map, \
393 : async_generator_function_with_name_and_home_object_map) \
394 : V(CLASS_FUNCTION_MAP_INDEX, Map, class_function_map) \
395 : V(STRING_FUNCTION_INDEX, JSFunction, string_function) \
396 : V(STRING_FUNCTION_PROTOTYPE_MAP_INDEX, Map, string_function_prototype_map) \
397 : V(STRING_ITERATOR_MAP_INDEX, Map, string_iterator_map) \
398 : V(SYMBOL_FUNCTION_INDEX, JSFunction, symbol_function) \
399 : V(NATIVE_FUNCTION_MAP_INDEX, Map, native_function_map) \
400 : V(WASM_INSTANCE_CONSTRUCTOR_INDEX, JSFunction, wasm_instance_constructor) \
401 : V(WASM_MEMORY_CONSTRUCTOR_INDEX, JSFunction, wasm_memory_constructor) \
402 : V(WASM_MODULE_CONSTRUCTOR_INDEX, JSFunction, wasm_module_constructor) \
403 : V(WASM_TABLE_CONSTRUCTOR_INDEX, JSFunction, wasm_table_constructor) \
404 : V(TEMPLATE_MAP_INDEX, HeapObject, template_map) \
405 : V(TYPED_ARRAY_FUN_INDEX, JSFunction, typed_array_function) \
406 : V(TYPED_ARRAY_PROTOTYPE_INDEX, JSObject, typed_array_prototype) \
407 : V(UINT16_ARRAY_FUN_INDEX, JSFunction, uint16_array_fun) \
408 : V(UINT32_ARRAY_FUN_INDEX, JSFunction, uint32_array_fun) \
409 : V(UINT8_ARRAY_FUN_INDEX, JSFunction, uint8_array_fun) \
410 : V(UINT8_CLAMPED_ARRAY_FUN_INDEX, JSFunction, uint8_clamped_array_fun) \
411 : NATIVE_CONTEXT_INTRINSIC_FUNCTIONS(V) \
412 : NATIVE_CONTEXT_IMPORTED_FIELDS(V) \
413 : NATIVE_CONTEXT_JS_ARRAY_ITERATOR_MAPS(V)
414 :
415 : // A table of all script contexts. Every loaded top-level script with top-level
416 : // lexical declarations contributes its ScriptContext into this table.
417 : //
418 : // The table is a fixed array, its first slot is the current used count and
419 : // the subsequent slots 1..used contain ScriptContexts.
420 : class ScriptContextTable : public FixedArray {
421 : public:
422 : // Conversions.
423 : static inline ScriptContextTable* cast(Object* context);
424 :
425 : struct LookupResult {
426 : int context_index;
427 : int slot_index;
428 : VariableMode mode;
429 : InitializationFlag init_flag;
430 : MaybeAssignedFlag maybe_assigned_flag;
431 : };
432 :
433 : inline int used() const;
434 : inline void set_used(int used);
435 :
436 : static inline Handle<Context> GetContext(Handle<ScriptContextTable> table,
437 : int i);
438 :
439 : // Lookup a variable `name` in a ScriptContextTable.
440 : // If it returns true, the variable is found and `result` contains
441 : // valid information about its location.
442 : // If it returns false, `result` is untouched.
443 : MUST_USE_RESULT
444 : static bool Lookup(Handle<ScriptContextTable> table, Handle<String> name,
445 : LookupResult* result);
446 :
447 : MUST_USE_RESULT
448 : static Handle<ScriptContextTable> Extend(Handle<ScriptContextTable> table,
449 : Handle<Context> script_context);
450 :
451 : static int GetContextOffset(int context_index) {
452 17462 : return kFirstContextOffset + context_index * kPointerSize;
453 : }
454 :
455 : private:
456 : static const int kUsedSlot = 0;
457 : static const int kFirstContextSlot = kUsedSlot + 1;
458 : static const int kFirstContextOffset =
459 : FixedArray::kHeaderSize + kFirstContextSlot * kPointerSize;
460 :
461 : DISALLOW_IMPLICIT_CONSTRUCTORS(ScriptContextTable);
462 : };
463 :
464 : // JSFunctions are pairs (context, function code), sometimes also called
465 : // closures. A Context object is used to represent function contexts and
466 : // dynamically pushed 'with' contexts (or 'scopes' in ECMA-262 speak).
467 : //
468 : // At runtime, the contexts build a stack in parallel to the execution
469 : // stack, with the top-most context being the current context. All contexts
470 : // have the following slots:
471 : //
472 : // [ closure ] This is the current function. It is the same for all
473 : // contexts inside a function. It provides access to the
474 : // incoming context (i.e., the outer context, which may
475 : // or may not become the current function's context), and
476 : // it provides access to the functions code and thus it's
477 : // scope information, which in turn contains the names of
478 : // statically allocated context slots. The names are needed
479 : // for dynamic lookups in the presence of 'with' or 'eval'.
480 : //
481 : // [ previous ] A pointer to the previous context.
482 : //
483 : // [ extension ] Additional data.
484 : //
485 : // For script contexts, it contains the respective ScopeInfo.
486 : //
487 : // For catch contexts, it contains a ContextExtension object
488 : // consisting of the ScopeInfo and the name of the catch
489 : // variable.
490 : //
491 : // For module contexts, it contains the module object.
492 : //
493 : // For block contexts, it contains either the respective
494 : // ScopeInfo or a ContextExtension object consisting of the
495 : // ScopeInfo and an "extension object" (see below).
496 : //
497 : // For with contexts, it contains a ContextExtension object
498 : // consisting of the ScopeInfo and an "extension object".
499 : //
500 : // An "extension object" is used to dynamically extend a context
501 : // with additional variables, namely in the implementation of the
502 : // 'with' construct and the 'eval' construct. For instance,
503 : // Context::Lookup also searches the extension object for
504 : // properties. (Storing the extension object is the original
505 : // purpose of this context slot, hence the name.)
506 : //
507 : // [ native_context ] A pointer to the native context.
508 : //
509 : // In addition, function contexts may have statically allocated context slots
510 : // to store local variables/functions that are accessed from inner functions
511 : // (via static context addresses) or through 'eval' (dynamic context lookups).
512 : // The native context contains additional slots for fast access to native
513 : // properties.
514 : //
515 : // Finally, with Harmony scoping, the JSFunction representing a top level
516 : // script will have the ScriptContext rather than a FunctionContext.
517 : // Script contexts from all top-level scripts are gathered in
518 : // ScriptContextTable.
519 :
520 : class Context: public FixedArray {
521 : public:
522 : // Conversions.
523 : static inline Context* cast(Object* context);
524 :
525 : // The default context slot layout; indices are FixedArray slot indices.
526 : enum Field {
527 : // These slots are in all contexts.
528 : CLOSURE_INDEX,
529 : PREVIOUS_INDEX,
530 : // The extension slot is used for either the global object (in native
531 : // contexts), eval extension object (function contexts), subject of with
532 : // (with contexts), or the variable name (catch contexts), the serialized
533 : // scope info (block contexts), or the module instance (module contexts).
534 : EXTENSION_INDEX,
535 : NATIVE_CONTEXT_INDEX,
536 :
537 : // These slots are only in native contexts.
538 : #define NATIVE_CONTEXT_SLOT(index, type, name) index,
539 : NATIVE_CONTEXT_FIELDS(NATIVE_CONTEXT_SLOT)
540 : #undef NATIVE_CONTEXT_SLOT
541 :
542 : // Properties from here are treated as weak references by the full GC.
543 : // Scavenge treats them as strong references.
544 : OPTIMIZED_CODE_LIST, // Weak.
545 : DEOPTIMIZED_CODE_LIST, // Weak.
546 : NEXT_CONTEXT_LINK, // Weak.
547 :
548 : // Total number of slots.
549 : NATIVE_CONTEXT_SLOTS,
550 : FIRST_WEAK_SLOT = OPTIMIZED_CODE_LIST,
551 : FIRST_JS_ARRAY_MAP_SLOT = JS_ARRAY_PACKED_SMI_ELEMENTS_MAP_INDEX,
552 :
553 : MIN_CONTEXT_SLOTS = GLOBAL_PROXY_INDEX,
554 : // This slot holds the thrown value in catch contexts.
555 : THROWN_OBJECT_INDEX = MIN_CONTEXT_SLOTS,
556 :
557 : // These slots hold values in debug evaluate contexts.
558 : WRAPPED_CONTEXT_INDEX = MIN_CONTEXT_SLOTS,
559 : WHITE_LIST_INDEX = MIN_CONTEXT_SLOTS + 1
560 : };
561 :
562 : // A region of native context entries containing maps for functions created
563 : // by Builtins::kFastNewClosure.
564 : static const int FIRST_FUNCTION_MAP_INDEX = SLOPPY_FUNCTION_MAP_INDEX;
565 : static const int LAST_FUNCTION_MAP_INDEX = CLASS_FUNCTION_MAP_INDEX;
566 :
567 : void ResetErrorsThrown();
568 : void IncrementErrorsThrown();
569 : int GetErrorsThrown();
570 :
571 : // Direct slot access.
572 : inline JSFunction* closure();
573 : inline void set_closure(JSFunction* closure);
574 :
575 : inline Context* previous();
576 : inline void set_previous(Context* context);
577 :
578 : inline Object* next_context_link();
579 :
580 : inline bool has_extension();
581 : inline HeapObject* extension();
582 : inline void set_extension(HeapObject* object);
583 : JSObject* extension_object();
584 : JSReceiver* extension_receiver();
585 : ScopeInfo* scope_info();
586 : String* catch_name();
587 :
588 : // Find the module context (assuming there is one) and return the associated
589 : // module object.
590 : Module* module();
591 :
592 : // Get the context where var declarations will be hoisted to, which
593 : // may be the context itself.
594 : Context* declaration_context();
595 : bool is_declaration_context();
596 :
597 : // Get the next closure's context on the context chain.
598 : Context* closure_context();
599 :
600 : // Returns a JSGlobalProxy object or null.
601 : JSObject* global_proxy();
602 : void set_global_proxy(JSObject* global);
603 :
604 : // Get the JSGlobalObject object.
605 : V8_EXPORT_PRIVATE JSGlobalObject* global_object();
606 :
607 : // Get the script context by traversing the context chain.
608 : Context* script_context();
609 :
610 : // Compute the native context.
611 : inline Context* native_context() const;
612 : inline void set_native_context(Context* context);
613 :
614 : // Predicates for context types. IsNativeContext is also defined on Object
615 : // because we frequently have to know if arbitrary objects are natives
616 : // contexts.
617 : inline bool IsNativeContext() const;
618 : inline bool IsFunctionContext() const;
619 : inline bool IsCatchContext() const;
620 : inline bool IsWithContext() const;
621 : inline bool IsDebugEvaluateContext() const;
622 : inline bool IsBlockContext() const;
623 : inline bool IsModuleContext() const;
624 : inline bool IsEvalContext() const;
625 : inline bool IsScriptContext() const;
626 :
627 : inline bool HasSameSecurityTokenAs(Context* that) const;
628 :
629 : // The native context also stores a list of all optimized code and a
630 : // list of all deoptimized code, which are needed by the deoptimizer.
631 : void AddOptimizedCode(Code* code);
632 : void SetOptimizedCodeListHead(Object* head);
633 : Object* OptimizedCodeListHead();
634 : void SetDeoptimizedCodeListHead(Object* head);
635 : Object* DeoptimizedCodeListHead();
636 :
637 : Handle<Object> ErrorMessageForCodeGenerationFromStrings();
638 :
639 : static int ImportedFieldIndexForName(Handle<String> name);
640 : static int IntrinsicIndexForName(Handle<String> name);
641 : static int IntrinsicIndexForName(const unsigned char* name, int length);
642 :
643 : #define NATIVE_CONTEXT_FIELD_ACCESSORS(index, type, name) \
644 : inline void set_##name(type* value); \
645 : inline bool is_##name(type* value) const; \
646 : inline type* name() const;
647 : NATIVE_CONTEXT_FIELDS(NATIVE_CONTEXT_FIELD_ACCESSORS)
648 : #undef NATIVE_CONTEXT_FIELD_ACCESSORS
649 :
650 : // Lookup the slot called name, starting with the current context.
651 : // There are three possibilities:
652 : //
653 : // 1) result->IsContext():
654 : // The binding was found in a context. *index is always the
655 : // non-negative slot index. *attributes is NONE for var and let
656 : // declarations, READ_ONLY for const declarations (never ABSENT).
657 : //
658 : // 2) result->IsJSObject():
659 : // The binding was found as a named property in a context extension
660 : // object (i.e., was introduced via eval), as a property on the subject
661 : // of with, or as a property of the global object. *index is -1 and
662 : // *attributes is not ABSENT.
663 : //
664 : // 3) result->IsModule():
665 : // The binding was found in module imports or exports.
666 : // *attributes is never ABSENT. imports are READ_ONLY.
667 : //
668 : // 4) result.is_null():
669 : // There was no binding found, *index is always -1 and *attributes is
670 : // always ABSENT.
671 : Handle<Object> Lookup(Handle<String> name, ContextLookupFlags flags,
672 : int* index, PropertyAttributes* attributes,
673 : InitializationFlag* init_flag,
674 : VariableMode* variable_mode,
675 : bool* is_sloppy_function_name = nullptr);
676 :
677 : // Code generation support.
678 : static int SlotOffset(int index) {
679 73337 : return kHeaderSize + index * kPointerSize - kHeapObjectTag;
680 : }
681 :
682 : static inline int FunctionMapIndex(LanguageMode language_mode,
683 : FunctionKind kind, bool has_prototype_slot,
684 : bool has_shared_name,
685 : bool needs_home_object);
686 :
687 : static int ArrayMapIndex(ElementsKind elements_kind) {
688 : DCHECK(IsFastElementsKind(elements_kind));
689 10331179 : return elements_kind + FIRST_JS_ARRAY_MAP_SLOT;
690 : }
691 :
692 : inline Map* GetInitialJSArrayMap(ElementsKind kind) const;
693 :
694 : static const int kSize = kHeaderSize + NATIVE_CONTEXT_SLOTS * kPointerSize;
695 : static const int kNotFound = -1;
696 :
697 : // GC support.
698 : typedef FixedBodyDescriptor<kHeaderSize, kSize, kSize> BodyDescriptor;
699 :
700 : typedef FixedBodyDescriptor<
701 : kHeaderSize, kHeaderSize + FIRST_WEAK_SLOT * kPointerSize, kSize>
702 : BodyDescriptorWeak;
703 :
704 : private:
705 : #ifdef DEBUG
706 : // Bootstrapping-aware type checks.
707 : V8_EXPORT_PRIVATE static bool IsBootstrappingOrNativeContext(Isolate* isolate,
708 : Object* object);
709 : static bool IsBootstrappingOrValidParentContext(Object* object, Context* kid);
710 : #endif
711 :
712 : STATIC_ASSERT(kHeaderSize == Internals::kContextHeaderSize);
713 : STATIC_ASSERT(EMBEDDER_DATA_INDEX == Internals::kContextEmbedderDataIndex);
714 : };
715 :
716 : typedef Context::Field ContextField;
717 :
718 : } // namespace internal
719 : } // namespace v8
720 :
721 : #endif // V8_CONTEXTS_H_
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