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 : LEXICAL_TEST =
24 : FOLLOW_CONTEXT_CHAIN | STOP_AT_DECLARATION_SCOPE | SKIP_WITH_CONTEXT,
25 : };
26 :
27 :
28 : // Heap-allocated activation contexts.
29 : //
30 : // Contexts are implemented as FixedArray objects; the Context
31 : // class is a convenience interface casted on a FixedArray object.
32 : //
33 : // Note: Context must have no virtual functions and Context objects
34 : // must always be allocated via Heap::AllocateContext() or
35 : // Factory::NewContext.
36 :
37 : #define NATIVE_CONTEXT_INTRINSIC_FUNCTIONS(V) \
38 : V(ASYNC_FUNCTION_AWAIT_CAUGHT_INDEX, JSFunction, \
39 : async_function_await_caught) \
40 : V(ASYNC_FUNCTION_AWAIT_UNCAUGHT_INDEX, JSFunction, \
41 : async_function_await_uncaught) \
42 : V(ASYNC_FUNCTION_PROMISE_CREATE_INDEX, JSFunction, \
43 : async_function_promise_create) \
44 : V(ASYNC_FUNCTION_PROMISE_RELEASE_INDEX, JSFunction, \
45 : async_function_promise_release) \
46 : V(IS_ARRAYLIKE, JSFunction, is_arraylike) \
47 : V(GENERATOR_NEXT_INTERNAL, JSFunction, generator_next_internal) \
48 : V(GET_TEMPLATE_CALL_SITE_INDEX, JSFunction, get_template_call_site) \
49 : V(MAKE_ERROR_INDEX, JSFunction, make_error) \
50 : V(MAKE_RANGE_ERROR_INDEX, JSFunction, make_range_error) \
51 : V(MAKE_SYNTAX_ERROR_INDEX, JSFunction, make_syntax_error) \
52 : V(MAKE_TYPE_ERROR_INDEX, JSFunction, make_type_error) \
53 : V(MAKE_URI_ERROR_INDEX, JSFunction, make_uri_error) \
54 : V(OBJECT_CREATE, JSFunction, object_create) \
55 : V(OBJECT_DEFINE_PROPERTIES, JSFunction, object_define_properties) \
56 : V(OBJECT_DEFINE_PROPERTY, JSFunction, object_define_property) \
57 : V(OBJECT_FREEZE, JSFunction, object_freeze) \
58 : V(OBJECT_GET_PROTOTYPE_OF, JSFunction, object_get_prototype_of) \
59 : V(OBJECT_IS_EXTENSIBLE, JSFunction, object_is_extensible) \
60 : V(OBJECT_IS_FROZEN, JSFunction, object_is_frozen) \
61 : V(OBJECT_IS_SEALED, JSFunction, object_is_sealed) \
62 : V(OBJECT_KEYS, JSFunction, object_keys) \
63 : V(REGEXP_INTERNAL_MATCH, JSFunction, regexp_internal_match) \
64 : V(REFLECT_APPLY_INDEX, JSFunction, reflect_apply) \
65 : V(REFLECT_CONSTRUCT_INDEX, JSFunction, reflect_construct) \
66 : V(REFLECT_DEFINE_PROPERTY_INDEX, JSFunction, reflect_define_property) \
67 : V(REFLECT_DELETE_PROPERTY_INDEX, JSFunction, reflect_delete_property) \
68 : V(SPREAD_ARGUMENTS_INDEX, JSFunction, spread_arguments) \
69 : V(SPREAD_ITERABLE_INDEX, JSFunction, spread_iterable) \
70 : V(TYPED_ARRAY_CONSTRUCT_BY_ARRAY_BUFFER_INDEX, JSFunction, \
71 : typed_array_construct_by_array_buffer) \
72 : V(TYPED_ARRAY_CONSTRUCT_BY_ARRAY_LIKE_INDEX, JSFunction, \
73 : typed_array_construct_by_array_like) \
74 : V(TYPED_ARRAY_CONSTRUCT_BY_LENGTH_INDEX, JSFunction, \
75 : typed_array_construct_by_length) \
76 : V(MATH_FLOOR_INDEX, JSFunction, math_floor) \
77 : V(MATH_POW_INDEX, JSFunction, math_pow) \
78 : V(NEW_PROMISE_CAPABILITY_INDEX, JSFunction, new_promise_capability) \
79 : V(PROMISE_INTERNAL_CONSTRUCTOR_INDEX, JSFunction, \
80 : promise_internal_constructor) \
81 : V(PROMISE_INTERNAL_REJECT_INDEX, JSFunction, promise_internal_reject) \
82 : V(IS_PROMISE_INDEX, JSFunction, is_promise) \
83 : V(PROMISE_RESOLVE_INDEX, JSFunction, promise_resolve) \
84 : V(PROMISE_THEN_INDEX, JSFunction, promise_then) \
85 : V(PROMISE_HANDLE_INDEX, JSFunction, promise_handle) \
86 : V(PROMISE_HANDLE_REJECT_INDEX, JSFunction, promise_handle_reject) \
87 : V(ASYNC_GENERATOR_AWAIT_CAUGHT, JSFunction, async_generator_await_caught) \
88 : V(ASYNC_GENERATOR_AWAIT_UNCAUGHT, JSFunction, async_generator_await_uncaught)
89 :
90 : #define NATIVE_CONTEXT_IMPORTED_FIELDS(V) \
91 : V(ARRAY_CONCAT_INDEX, JSFunction, array_concat) \
92 : V(ARRAY_POP_INDEX, JSFunction, array_pop) \
93 : V(ARRAY_PUSH_INDEX, JSFunction, array_push) \
94 : V(ARRAY_SHIFT_INDEX, JSFunction, array_shift) \
95 : V(ARRAY_SPLICE_INDEX, JSFunction, array_splice) \
96 : V(ARRAY_SLICE_INDEX, JSFunction, array_slice) \
97 : V(ARRAY_UNSHIFT_INDEX, JSFunction, array_unshift) \
98 : V(ARRAY_ENTRIES_ITERATOR_INDEX, JSFunction, array_entries_iterator) \
99 : V(ARRAY_FOR_EACH_ITERATOR_INDEX, JSFunction, array_for_each_iterator) \
100 : V(ARRAY_KEYS_ITERATOR_INDEX, JSFunction, array_keys_iterator) \
101 : V(ARRAY_VALUES_ITERATOR_INDEX, JSFunction, array_values_iterator) \
102 : V(DERIVED_GET_TRAP_INDEX, JSFunction, derived_get_trap) \
103 : V(ERROR_FUNCTION_INDEX, JSFunction, error_function) \
104 : V(ERROR_TO_STRING, JSFunction, error_to_string) \
105 : V(EVAL_ERROR_FUNCTION_INDEX, JSFunction, eval_error_function) \
106 : V(GLOBAL_EVAL_FUN_INDEX, JSFunction, global_eval_fun) \
107 : V(GLOBAL_PROXY_FUNCTION_INDEX, JSFunction, global_proxy_function) \
108 : V(MAP_DELETE_METHOD_INDEX, JSFunction, map_delete) \
109 : V(MAP_GET_METHOD_INDEX, JSFunction, map_get) \
110 : V(MAP_HAS_METHOD_INDEX, JSFunction, map_has) \
111 : V(MAP_SET_METHOD_INDEX, JSFunction, map_set) \
112 : V(FUNCTION_HAS_INSTANCE_INDEX, JSFunction, function_has_instance) \
113 : V(OBJECT_VALUE_OF, JSFunction, object_value_of) \
114 : V(OBJECT_TO_STRING, JSFunction, object_to_string) \
115 : V(PROMISE_CATCH_INDEX, JSFunction, promise_catch) \
116 : V(PROMISE_FUNCTION_INDEX, JSFunction, promise_function) \
117 : V(RANGE_ERROR_FUNCTION_INDEX, JSFunction, range_error_function) \
118 : V(REFERENCE_ERROR_FUNCTION_INDEX, JSFunction, reference_error_function) \
119 : V(SET_ADD_METHOD_INDEX, JSFunction, set_add) \
120 : V(SET_DELETE_METHOD_INDEX, JSFunction, set_delete) \
121 : V(SET_HAS_METHOD_INDEX, JSFunction, set_has) \
122 : V(SYNTAX_ERROR_FUNCTION_INDEX, JSFunction, syntax_error_function) \
123 : V(TYPE_ERROR_FUNCTION_INDEX, JSFunction, type_error_function) \
124 : V(URI_ERROR_FUNCTION_INDEX, JSFunction, uri_error_function) \
125 : V(WASM_COMPILE_ERROR_FUNCTION_INDEX, JSFunction, \
126 : wasm_compile_error_function) \
127 : V(WASM_LINK_ERROR_FUNCTION_INDEX, JSFunction, wasm_link_error_function) \
128 : V(WASM_RUNTIME_ERROR_FUNCTION_INDEX, JSFunction, wasm_runtime_error_function)
129 :
130 : #define NATIVE_CONTEXT_JS_ARRAY_ITERATOR_MAPS(V) \
131 : V(TYPED_ARRAY_KEY_ITERATOR_MAP_INDEX, Map, typed_array_key_iterator_map) \
132 : V(FAST_ARRAY_KEY_ITERATOR_MAP_INDEX, Map, fast_array_key_iterator_map) \
133 : V(GENERIC_ARRAY_KEY_ITERATOR_MAP_INDEX, Map, array_key_iterator_map) \
134 : \
135 : V(UINT8_ARRAY_KEY_VALUE_ITERATOR_MAP_INDEX, Map, \
136 : uint8_array_key_value_iterator_map) \
137 : V(INT8_ARRAY_KEY_VALUE_ITERATOR_MAP_INDEX, Map, \
138 : int8_array_key_value_iterator_map) \
139 : V(UINT16_ARRAY_KEY_VALUE_ITERATOR_MAP_INDEX, Map, \
140 : uint16_array_key_value_iterator_map) \
141 : V(INT16_ARRAY_KEY_VALUE_ITERATOR_MAP_INDEX, Map, \
142 : int16_array_key_value_iterator_map) \
143 : V(UINT32_ARRAY_KEY_VALUE_ITERATOR_MAP_INDEX, Map, \
144 : uint32_array_key_value_iterator_map) \
145 : V(INT32_ARRAY_KEY_VALUE_ITERATOR_MAP_INDEX, Map, \
146 : int32_array_key_value_iterator_map) \
147 : V(FLOAT32_ARRAY_KEY_VALUE_ITERATOR_MAP_INDEX, Map, \
148 : float32_array_key_value_iterator_map) \
149 : V(FLOAT64_ARRAY_KEY_VALUE_ITERATOR_MAP_INDEX, Map, \
150 : float64_array_key_value_iterator_map) \
151 : V(UINT8_CLAMPED_ARRAY_KEY_VALUE_ITERATOR_MAP_INDEX, Map, \
152 : uint8_clamped_array_key_value_iterator_map) \
153 : \
154 : V(FAST_SMI_ARRAY_KEY_VALUE_ITERATOR_MAP_INDEX, Map, \
155 : fast_smi_array_key_value_iterator_map) \
156 : V(FAST_HOLEY_SMI_ARRAY_KEY_VALUE_ITERATOR_MAP_INDEX, Map, \
157 : fast_holey_smi_array_key_value_iterator_map) \
158 : V(FAST_ARRAY_KEY_VALUE_ITERATOR_MAP_INDEX, Map, \
159 : fast_array_key_value_iterator_map) \
160 : V(FAST_HOLEY_ARRAY_KEY_VALUE_ITERATOR_MAP_INDEX, Map, \
161 : fast_holey_array_key_value_iterator_map) \
162 : V(FAST_DOUBLE_ARRAY_KEY_VALUE_ITERATOR_MAP_INDEX, Map, \
163 : fast_double_array_key_value_iterator_map) \
164 : V(FAST_HOLEY_DOUBLE_ARRAY_KEY_VALUE_ITERATOR_MAP_INDEX, Map, \
165 : fast_holey_double_array_key_value_iterator_map) \
166 : V(GENERIC_ARRAY_KEY_VALUE_ITERATOR_MAP_INDEX, Map, \
167 : array_key_value_iterator_map) \
168 : \
169 : V(UINT8_ARRAY_VALUE_ITERATOR_MAP_INDEX, Map, uint8_array_value_iterator_map) \
170 : V(INT8_ARRAY_VALUE_ITERATOR_MAP_INDEX, Map, int8_array_value_iterator_map) \
171 : V(UINT16_ARRAY_VALUE_ITERATOR_MAP_INDEX, Map, \
172 : uint16_array_value_iterator_map) \
173 : V(INT16_ARRAY_VALUE_ITERATOR_MAP_INDEX, Map, int16_array_value_iterator_map) \
174 : V(UINT32_ARRAY_VALUE_ITERATOR_MAP_INDEX, Map, \
175 : uint32_array_value_iterator_map) \
176 : V(INT32_ARRAY_VALUE_ITERATOR_MAP_INDEX, Map, int32_array_value_iterator_map) \
177 : V(FLOAT32_ARRAY_VALUE_ITERATOR_MAP_INDEX, Map, \
178 : float32_array_value_iterator_map) \
179 : V(FLOAT64_ARRAY_VALUE_ITERATOR_MAP_INDEX, Map, \
180 : float64_array_value_iterator_map) \
181 : V(UINT8_CLAMPED_ARRAY_VALUE_ITERATOR_MAP_INDEX, Map, \
182 : uint8_clamped_array_value_iterator_map) \
183 : \
184 : V(FAST_SMI_ARRAY_VALUE_ITERATOR_MAP_INDEX, Map, \
185 : fast_smi_array_value_iterator_map) \
186 : V(FAST_HOLEY_SMI_ARRAY_VALUE_ITERATOR_MAP_INDEX, Map, \
187 : fast_holey_smi_array_value_iterator_map) \
188 : V(FAST_ARRAY_VALUE_ITERATOR_MAP_INDEX, Map, fast_array_value_iterator_map) \
189 : V(FAST_HOLEY_ARRAY_VALUE_ITERATOR_MAP_INDEX, Map, \
190 : fast_holey_array_value_iterator_map) \
191 : V(FAST_DOUBLE_ARRAY_VALUE_ITERATOR_MAP_INDEX, Map, \
192 : fast_double_array_value_iterator_map) \
193 : V(FAST_HOLEY_DOUBLE_ARRAY_VALUE_ITERATOR_MAP_INDEX, Map, \
194 : fast_holey_double_array_value_iterator_map) \
195 : V(GENERIC_ARRAY_VALUE_ITERATOR_MAP_INDEX, Map, array_value_iterator_map)
196 :
197 : #define NATIVE_CONTEXT_FIELDS(V) \
198 : V(GLOBAL_PROXY_INDEX, JSObject, global_proxy_object) \
199 : V(EMBEDDER_DATA_INDEX, FixedArray, embedder_data) \
200 : /* Below is alpha-sorted */ \
201 : V(ACCESSOR_PROPERTY_DESCRIPTOR_MAP_INDEX, Map, \
202 : accessor_property_descriptor_map) \
203 : V(ALLOW_CODE_GEN_FROM_STRINGS_INDEX, Object, allow_code_gen_from_strings) \
204 : V(ARRAY_BUFFER_FUN_INDEX, JSFunction, array_buffer_fun) \
205 : V(ARRAY_BUFFER_MAP_INDEX, Map, array_buffer_map) \
206 : V(ARRAY_BUFFER_NOINIT_FUN_INDEX, JSFunction, array_buffer_noinit_fun) \
207 : V(ARRAY_FUNCTION_INDEX, JSFunction, array_function) \
208 : V(ASYNC_FROM_SYNC_ITERATOR_MAP_INDEX, Map, async_from_sync_iterator_map) \
209 : V(ASYNC_FUNCTION_AWAIT_REJECT_SHARED_FUN, SharedFunctionInfo, \
210 : async_function_await_reject_shared_fun) \
211 : V(ASYNC_FUNCTION_AWAIT_RESOLVE_SHARED_FUN, SharedFunctionInfo, \
212 : async_function_await_resolve_shared_fun) \
213 : V(ASYNC_FUNCTION_FUNCTION_INDEX, JSFunction, async_function_constructor) \
214 : V(ASYNC_GENERATOR_FUNCTION_FUNCTION_INDEX, JSFunction, \
215 : async_generator_function_function) \
216 : V(ASYNC_ITERATOR_VALUE_UNWRAP_SHARED_FUN, SharedFunctionInfo, \
217 : async_iterator_value_unwrap_shared_fun) \
218 : V(ASYNC_GENERATOR_AWAIT_REJECT_SHARED_FUN, SharedFunctionInfo, \
219 : async_generator_await_reject_shared_fun) \
220 : V(ASYNC_GENERATOR_AWAIT_RESOLVE_SHARED_FUN, SharedFunctionInfo, \
221 : async_generator_await_resolve_shared_fun) \
222 : V(BOOLEAN_FUNCTION_INDEX, JSFunction, boolean_function) \
223 : V(BOUND_FUNCTION_WITH_CONSTRUCTOR_MAP_INDEX, Map, \
224 : bound_function_with_constructor_map) \
225 : V(BOUND_FUNCTION_WITHOUT_CONSTRUCTOR_MAP_INDEX, Map, \
226 : bound_function_without_constructor_map) \
227 : V(CALL_AS_CONSTRUCTOR_DELEGATE_INDEX, JSFunction, \
228 : call_as_constructor_delegate) \
229 : V(CALL_AS_FUNCTION_DELEGATE_INDEX, JSFunction, call_as_function_delegate) \
230 : V(CALLSITE_FUNCTION_INDEX, JSFunction, callsite_function) \
231 : V(CONTEXT_EXTENSION_FUNCTION_INDEX, JSFunction, context_extension_function) \
232 : V(CURRENT_MODULE_INDEX, Module, current_module) \
233 : V(DATA_PROPERTY_DESCRIPTOR_MAP_INDEX, Map, data_property_descriptor_map) \
234 : V(DATA_VIEW_FUN_INDEX, JSFunction, data_view_fun) \
235 : V(DATE_FUNCTION_INDEX, JSFunction, date_function) \
236 : V(DEBUG_CONTEXT_ID_INDEX, Object, debug_context_id) \
237 : V(ERROR_MESSAGE_FOR_CODE_GEN_FROM_STRINGS_INDEX, Object, \
238 : error_message_for_code_gen_from_strings) \
239 : V(ERRORS_THROWN_INDEX, Smi, errors_thrown) \
240 : V(EXTRAS_EXPORTS_OBJECT_INDEX, JSObject, extras_binding_object) \
241 : V(EXTRAS_UTILS_OBJECT_INDEX, Object, extras_utils_object) \
242 : V(FAST_ALIASED_ARGUMENTS_MAP_INDEX, Map, fast_aliased_arguments_map) \
243 : V(FAST_TEMPLATE_INSTANTIATIONS_CACHE_INDEX, FixedArray, \
244 : fast_template_instantiations_cache) \
245 : V(FLOAT32_ARRAY_FUN_INDEX, JSFunction, float32_array_fun) \
246 : V(FLOAT64_ARRAY_FUN_INDEX, JSFunction, float64_array_fun) \
247 : V(FUNCTION_FUNCTION_INDEX, JSFunction, function_function) \
248 : V(GENERATOR_FUNCTION_FUNCTION_INDEX, JSFunction, \
249 : generator_function_function) \
250 : V(GENERATOR_OBJECT_PROTOTYPE_MAP_INDEX, Map, generator_object_prototype_map) \
251 : V(ASYNC_GENERATOR_OBJECT_PROTOTYPE_MAP_INDEX, Map, \
252 : async_generator_object_prototype_map) \
253 : V(INITIAL_ARRAY_ITERATOR_PROTOTYPE_INDEX, JSObject, \
254 : initial_array_iterator_prototype) \
255 : V(INITIAL_ARRAY_ITERATOR_PROTOTYPE_MAP_INDEX, Map, \
256 : initial_array_iterator_prototype_map) \
257 : V(INITIAL_ARRAY_PROTOTYPE_INDEX, JSObject, initial_array_prototype) \
258 : V(INITIAL_GENERATOR_PROTOTYPE_INDEX, JSObject, initial_generator_prototype) \
259 : V(INITIAL_ASYNC_GENERATOR_PROTOTYPE_INDEX, JSObject, \
260 : initial_async_generator_prototype) \
261 : V(INITIAL_ITERATOR_PROTOTYPE_INDEX, JSObject, initial_iterator_prototype) \
262 : V(INITIAL_OBJECT_PROTOTYPE_INDEX, JSObject, initial_object_prototype) \
263 : V(INT16_ARRAY_FUN_INDEX, JSFunction, int16_array_fun) \
264 : V(INT32_ARRAY_FUN_INDEX, JSFunction, int32_array_fun) \
265 : V(INT8_ARRAY_FUN_INDEX, JSFunction, int8_array_fun) \
266 : V(INTERNAL_ARRAY_FUNCTION_INDEX, JSFunction, internal_array_function) \
267 : V(ITERATOR_RESULT_MAP_INDEX, Map, iterator_result_map) \
268 : V(INTL_DATE_TIME_FORMAT_FUNCTION_INDEX, JSFunction, \
269 : intl_date_time_format_function) \
270 : V(INTL_NUMBER_FORMAT_FUNCTION_INDEX, JSFunction, \
271 : intl_number_format_function) \
272 : V(INTL_COLLATOR_FUNCTION_INDEX, JSFunction, intl_collator_function) \
273 : V(INTL_V8_BREAK_ITERATOR_FUNCTION_INDEX, JSFunction, \
274 : intl_v8_break_iterator_function) \
275 : V(JS_ARRAY_FAST_SMI_ELEMENTS_MAP_INDEX, Map, \
276 : js_array_fast_smi_elements_map_index) \
277 : V(JS_ARRAY_FAST_HOLEY_SMI_ELEMENTS_MAP_INDEX, Map, \
278 : js_array_fast_holey_smi_elements_map_index) \
279 : V(JS_ARRAY_FAST_ELEMENTS_MAP_INDEX, Map, js_array_fast_elements_map_index) \
280 : V(JS_ARRAY_FAST_HOLEY_ELEMENTS_MAP_INDEX, Map, \
281 : js_array_fast_holey_elements_map_index) \
282 : V(JS_ARRAY_FAST_DOUBLE_ELEMENTS_MAP_INDEX, Map, \
283 : js_array_fast_double_elements_map_index) \
284 : V(JS_ARRAY_FAST_HOLEY_DOUBLE_ELEMENTS_MAP_INDEX, Map, \
285 : js_array_fast_holey_double_elements_map_index) \
286 : V(JS_MAP_FUN_INDEX, JSFunction, js_map_fun) \
287 : V(JS_MAP_MAP_INDEX, Map, js_map_map) \
288 : V(JS_MODULE_NAMESPACE_MAP, Map, js_module_namespace_map) \
289 : V(JS_SET_FUN_INDEX, JSFunction, js_set_fun) \
290 : V(JS_SET_MAP_INDEX, Map, js_set_map) \
291 : V(JS_WEAK_MAP_FUN_INDEX, JSFunction, js_weak_map_fun) \
292 : V(JS_WEAK_SET_FUN_INDEX, JSFunction, js_weak_set_fun) \
293 : V(MAP_CACHE_INDEX, Object, map_cache) \
294 : V(MAP_ITERATOR_MAP_INDEX, Map, map_iterator_map) \
295 : V(MATH_RANDOM_INDEX_INDEX, Smi, math_random_index) \
296 : V(MATH_RANDOM_CACHE_INDEX, Object, math_random_cache) \
297 : V(MESSAGE_LISTENERS_INDEX, TemplateList, message_listeners) \
298 : V(NATIVES_UTILS_OBJECT_INDEX, Object, natives_utils_object) \
299 : V(NORMALIZED_MAP_CACHE_INDEX, Object, normalized_map_cache) \
300 : V(NUMBER_FUNCTION_INDEX, JSFunction, number_function) \
301 : V(OBJECT_FUNCTION_INDEX, JSFunction, object_function) \
302 : V(OBJECT_FUNCTION_PROTOTYPE_MAP_INDEX, Map, object_function_prototype_map) \
303 : V(OPAQUE_REFERENCE_FUNCTION_INDEX, JSFunction, opaque_reference_function) \
304 : V(OSR_CODE_TABLE_INDEX, FixedArray, osr_code_table) \
305 : V(PROXY_CALLABLE_MAP_INDEX, Map, proxy_callable_map) \
306 : V(PROXY_CONSTRUCTOR_MAP_INDEX, Map, proxy_constructor_map) \
307 : V(PROXY_FUNCTION_INDEX, JSFunction, proxy_function) \
308 : V(PROXY_FUNCTION_MAP_INDEX, Map, proxy_function_map) \
309 : V(PROXY_MAP_INDEX, Map, proxy_map) \
310 : V(PROMISE_GET_CAPABILITIES_EXECUTOR_SHARED_FUN, SharedFunctionInfo, \
311 : promise_get_capabilities_executor_shared_fun) \
312 : V(PROMISE_RESOLVE_SHARED_FUN, SharedFunctionInfo, \
313 : promise_resolve_shared_fun) \
314 : V(PROMISE_REJECT_SHARED_FUN, SharedFunctionInfo, promise_reject_shared_fun) \
315 : V(PROMISE_THEN_FINALLY_SHARED_FUN, SharedFunctionInfo, \
316 : promise_then_finally_shared_fun) \
317 : V(PROMISE_CATCH_FINALLY_SHARED_FUN, SharedFunctionInfo, \
318 : promise_catch_finally_shared_fun) \
319 : V(PROMISE_VALUE_THUNK_FINALLY_SHARED_FUN, SharedFunctionInfo, \
320 : promise_value_thunk_finally_shared_fun) \
321 : V(PROMISE_THROWER_FINALLY_SHARED_FUN, SharedFunctionInfo, \
322 : promise_thrower_finally_shared_fun) \
323 : V(PROMISE_PROTOTYPE_MAP_INDEX, Map, promise_prototype_map) \
324 : V(REGEXP_EXEC_FUNCTION_INDEX, JSFunction, regexp_exec_function) \
325 : V(REGEXP_FUNCTION_INDEX, JSFunction, regexp_function) \
326 : V(REGEXP_LAST_MATCH_INFO_INDEX, RegExpMatchInfo, regexp_last_match_info) \
327 : V(REGEXP_INTERNAL_MATCH_INFO_INDEX, RegExpMatchInfo, \
328 : regexp_internal_match_info) \
329 : V(REGEXP_PROTOTYPE_MAP_INDEX, Map, regexp_prototype_map) \
330 : V(REGEXP_RESULT_MAP_INDEX, Map, regexp_result_map) \
331 : V(SCRIPT_CONTEXT_TABLE_INDEX, ScriptContextTable, script_context_table) \
332 : V(SCRIPT_FUNCTION_INDEX, JSFunction, script_function) \
333 : V(SECURITY_TOKEN_INDEX, Object, security_token) \
334 : V(SELF_WEAK_CELL_INDEX, WeakCell, self_weak_cell) \
335 : V(SET_ITERATOR_MAP_INDEX, Map, set_iterator_map) \
336 : V(SHARED_ARRAY_BUFFER_FUN_INDEX, JSFunction, shared_array_buffer_fun) \
337 : V(SLOPPY_ARGUMENTS_MAP_INDEX, Map, sloppy_arguments_map) \
338 : V(SLOPPY_FUNCTION_MAP_INDEX, Map, sloppy_function_map) \
339 : V(SLOPPY_FUNCTION_WITHOUT_PROTOTYPE_MAP_INDEX, Map, \
340 : sloppy_function_without_prototype_map) \
341 : V(SLOPPY_FUNCTION_WITH_READONLY_PROTOTYPE_MAP_INDEX, Map, \
342 : sloppy_function_with_readonly_prototype_map) \
343 : V(SLOW_ALIASED_ARGUMENTS_MAP_INDEX, Map, slow_aliased_arguments_map) \
344 : V(SLOW_OBJECT_WITH_NULL_PROTOTYPE_MAP, Map, \
345 : slow_object_with_null_prototype_map) \
346 : V(SLOW_TEMPLATE_INSTANTIATIONS_CACHE_INDEX, UnseededNumberDictionary, \
347 : slow_template_instantiations_cache) \
348 : V(STRICT_ARGUMENTS_MAP_INDEX, Map, strict_arguments_map) \
349 : V(ASYNC_FUNCTION_MAP_INDEX, Map, async_function_map) \
350 : V(STRICT_FUNCTION_MAP_INDEX, Map, strict_function_map) \
351 : V(STRICT_FUNCTION_WITHOUT_PROTOTYPE_MAP_INDEX, Map, \
352 : strict_function_without_prototype_map) \
353 : V(GENERATOR_FUNCTION_MAP_INDEX, Map, generator_function_map) \
354 : V(ASYNC_GENERATOR_FUNCTION_MAP_INDEX, Map, async_generator_function_map) \
355 : V(CLASS_FUNCTION_MAP_INDEX, Map, class_function_map) \
356 : V(STRING_FUNCTION_INDEX, JSFunction, string_function) \
357 : V(STRING_FUNCTION_PROTOTYPE_MAP_INDEX, Map, string_function_prototype_map) \
358 : V(STRING_ITERATOR_MAP_INDEX, Map, string_iterator_map) \
359 : V(SYMBOL_FUNCTION_INDEX, JSFunction, symbol_function) \
360 : V(NATIVE_FUNCTION_MAP_INDEX, Map, native_function_map) \
361 : V(WASM_FUNCTION_MAP_INDEX, Map, wasm_function_map) \
362 : V(WASM_INSTANCE_CONSTRUCTOR_INDEX, JSFunction, wasm_instance_constructor) \
363 : V(WASM_INSTANCE_SYM_INDEX, Symbol, wasm_instance_sym) \
364 : V(WASM_MEMORY_CONSTRUCTOR_INDEX, JSFunction, wasm_memory_constructor) \
365 : V(WASM_MEMORY_SYM_INDEX, Symbol, wasm_memory_sym) \
366 : V(WASM_MODULE_CONSTRUCTOR_INDEX, JSFunction, wasm_module_constructor) \
367 : V(WASM_MODULE_SYM_INDEX, Symbol, wasm_module_sym) \
368 : V(WASM_TABLE_CONSTRUCTOR_INDEX, JSFunction, wasm_table_constructor) \
369 : V(WASM_TABLE_SYM_INDEX, Symbol, wasm_table_sym) \
370 : V(TYPED_ARRAY_FUN_INDEX, JSFunction, typed_array_function) \
371 : V(TYPED_ARRAY_PROTOTYPE_INDEX, JSObject, typed_array_prototype) \
372 : V(UINT16_ARRAY_FUN_INDEX, JSFunction, uint16_array_fun) \
373 : V(UINT32_ARRAY_FUN_INDEX, JSFunction, uint32_array_fun) \
374 : V(UINT8_ARRAY_FUN_INDEX, JSFunction, uint8_array_fun) \
375 : V(UINT8_CLAMPED_ARRAY_FUN_INDEX, JSFunction, uint8_clamped_array_fun) \
376 : V(EXPORTS_CONTAINER, Object, exports_container) \
377 : NATIVE_CONTEXT_INTRINSIC_FUNCTIONS(V) \
378 : NATIVE_CONTEXT_IMPORTED_FIELDS(V) \
379 : NATIVE_CONTEXT_JS_ARRAY_ITERATOR_MAPS(V)
380 :
381 : // A table of all script contexts. Every loaded top-level script with top-level
382 : // lexical declarations contributes its ScriptContext into this table.
383 : //
384 : // The table is a fixed array, its first slot is the current used count and
385 : // the subsequent slots 1..used contain ScriptContexts.
386 : class ScriptContextTable : public FixedArray {
387 : public:
388 : // Conversions.
389 : static inline ScriptContextTable* cast(Object* context);
390 :
391 : struct LookupResult {
392 : int context_index;
393 : int slot_index;
394 : VariableMode mode;
395 : InitializationFlag init_flag;
396 : MaybeAssignedFlag maybe_assigned_flag;
397 : };
398 :
399 : inline int used() const;
400 : inline void set_used(int used);
401 :
402 : static inline Handle<Context> GetContext(Handle<ScriptContextTable> table,
403 : int i);
404 :
405 : // Lookup a variable `name` in a ScriptContextTable.
406 : // If it returns true, the variable is found and `result` contains
407 : // valid information about its location.
408 : // If it returns false, `result` is untouched.
409 : MUST_USE_RESULT
410 : static bool Lookup(Handle<ScriptContextTable> table, Handle<String> name,
411 : LookupResult* result);
412 :
413 : MUST_USE_RESULT
414 : static Handle<ScriptContextTable> Extend(Handle<ScriptContextTable> table,
415 : Handle<Context> script_context);
416 :
417 : static int GetContextOffset(int context_index) {
418 14992 : return kFirstContextOffset + context_index * kPointerSize;
419 : }
420 :
421 : private:
422 : static const int kUsedSlot = 0;
423 : static const int kFirstContextSlot = kUsedSlot + 1;
424 : static const int kFirstContextOffset =
425 : FixedArray::kHeaderSize + kFirstContextSlot * kPointerSize;
426 :
427 : DISALLOW_IMPLICIT_CONSTRUCTORS(ScriptContextTable);
428 : };
429 :
430 : // JSFunctions are pairs (context, function code), sometimes also called
431 : // closures. A Context object is used to represent function contexts and
432 : // dynamically pushed 'with' contexts (or 'scopes' in ECMA-262 speak).
433 : //
434 : // At runtime, the contexts build a stack in parallel to the execution
435 : // stack, with the top-most context being the current context. All contexts
436 : // have the following slots:
437 : //
438 : // [ closure ] This is the current function. It is the same for all
439 : // contexts inside a function. It provides access to the
440 : // incoming context (i.e., the outer context, which may
441 : // or may not become the current function's context), and
442 : // it provides access to the functions code and thus it's
443 : // scope information, which in turn contains the names of
444 : // statically allocated context slots. The names are needed
445 : // for dynamic lookups in the presence of 'with' or 'eval'.
446 : //
447 : // [ previous ] A pointer to the previous context.
448 : //
449 : // [ extension ] Additional data.
450 : //
451 : // For script contexts, it contains the respective ScopeInfo.
452 : //
453 : // For catch contexts, it contains a ContextExtension object
454 : // consisting of the ScopeInfo and the name of the catch
455 : // variable.
456 : //
457 : // For module contexts, it contains the module object.
458 : //
459 : // For block contexts, it contains either the respective
460 : // ScopeInfo or a ContextExtension object consisting of the
461 : // ScopeInfo and an "extension object" (see below).
462 : //
463 : // For with contexts, it contains a ContextExtension object
464 : // consisting of the ScopeInfo and an "extension object".
465 : //
466 : // An "extension object" is used to dynamically extend a context
467 : // with additional variables, namely in the implementation of the
468 : // 'with' construct and the 'eval' construct. For instance,
469 : // Context::Lookup also searches the extension object for
470 : // properties. (Storing the extension object is the original
471 : // purpose of this context slot, hence the name.)
472 : //
473 : // [ native_context ] A pointer to the native context.
474 : //
475 : // In addition, function contexts may have statically allocated context slots
476 : // to store local variables/functions that are accessed from inner functions
477 : // (via static context addresses) or through 'eval' (dynamic context lookups).
478 : // The native context contains additional slots for fast access to native
479 : // properties.
480 : //
481 : // Finally, with Harmony scoping, the JSFunction representing a top level
482 : // script will have the ScriptContext rather than a FunctionContext.
483 : // Script contexts from all top-level scripts are gathered in
484 : // ScriptContextTable.
485 :
486 : class Context: public FixedArray {
487 : public:
488 : // Conversions.
489 : static inline Context* cast(Object* context);
490 :
491 : // The default context slot layout; indices are FixedArray slot indices.
492 : enum Field {
493 : // These slots are in all contexts.
494 : CLOSURE_INDEX,
495 : PREVIOUS_INDEX,
496 : // The extension slot is used for either the global object (in native
497 : // contexts), eval extension object (function contexts), subject of with
498 : // (with contexts), or the variable name (catch contexts), the serialized
499 : // scope info (block contexts), or the module instance (module contexts).
500 : EXTENSION_INDEX,
501 : NATIVE_CONTEXT_INDEX,
502 :
503 : // These slots are only in native contexts.
504 : #define NATIVE_CONTEXT_SLOT(index, type, name) index,
505 : NATIVE_CONTEXT_FIELDS(NATIVE_CONTEXT_SLOT)
506 : #undef NATIVE_CONTEXT_SLOT
507 :
508 : // Properties from here are treated as weak references by the full GC.
509 : // Scavenge treats them as strong references.
510 : OPTIMIZED_FUNCTIONS_LIST, // Weak.
511 : OPTIMIZED_CODE_LIST, // Weak.
512 : DEOPTIMIZED_CODE_LIST, // Weak.
513 : NEXT_CONTEXT_LINK, // Weak.
514 :
515 : // Total number of slots.
516 : NATIVE_CONTEXT_SLOTS,
517 : FIRST_WEAK_SLOT = OPTIMIZED_FUNCTIONS_LIST,
518 : FIRST_JS_ARRAY_MAP_SLOT = JS_ARRAY_FAST_SMI_ELEMENTS_MAP_INDEX,
519 :
520 : MIN_CONTEXT_SLOTS = GLOBAL_PROXY_INDEX,
521 : // This slot holds the thrown value in catch contexts.
522 : THROWN_OBJECT_INDEX = MIN_CONTEXT_SLOTS,
523 :
524 : // These slots hold values in debug evaluate contexts.
525 : WRAPPED_CONTEXT_INDEX = MIN_CONTEXT_SLOTS,
526 : WHITE_LIST_INDEX = MIN_CONTEXT_SLOTS + 1
527 : };
528 :
529 : void ResetErrorsThrown();
530 : void IncrementErrorsThrown();
531 : int GetErrorsThrown();
532 :
533 : // Direct slot access.
534 : inline JSFunction* closure();
535 : inline void set_closure(JSFunction* closure);
536 :
537 : inline Context* previous();
538 : inline void set_previous(Context* context);
539 :
540 : inline Object* next_context_link();
541 :
542 : inline bool has_extension();
543 : inline HeapObject* extension();
544 : inline void set_extension(HeapObject* object);
545 : JSObject* extension_object();
546 : JSReceiver* extension_receiver();
547 : ScopeInfo* scope_info();
548 : String* catch_name();
549 :
550 : // Find the module context (assuming there is one) and return the associated
551 : // module object.
552 : Module* module();
553 :
554 : // Get the context where var declarations will be hoisted to, which
555 : // may be the context itself.
556 : Context* declaration_context();
557 : bool is_declaration_context();
558 :
559 : // Get the next closure's context on the context chain.
560 : Context* closure_context();
561 :
562 : // Returns a JSGlobalProxy object or null.
563 : JSObject* global_proxy();
564 : void set_global_proxy(JSObject* global);
565 :
566 : // Get the JSGlobalObject object.
567 : V8_EXPORT_PRIVATE JSGlobalObject* global_object();
568 :
569 : // Get the script context by traversing the context chain.
570 : Context* script_context();
571 :
572 : // Compute the native context.
573 : inline Context* native_context();
574 : inline void set_native_context(Context* context);
575 :
576 : // Predicates for context types. IsNativeContext is also defined on Object
577 : // because we frequently have to know if arbitrary objects are natives
578 : // contexts.
579 : inline bool IsNativeContext();
580 : inline bool IsFunctionContext();
581 : inline bool IsCatchContext();
582 : inline bool IsWithContext();
583 : inline bool IsDebugEvaluateContext();
584 : inline bool IsBlockContext();
585 : inline bool IsModuleContext();
586 : inline bool IsEvalContext();
587 : inline bool IsScriptContext();
588 :
589 : inline bool HasSameSecurityTokenAs(Context* that);
590 :
591 : // Removes a specific optimized code object from the optimized code map.
592 : // In case of non-OSR the code reference is cleared from the cache entry but
593 : // the entry itself is left in the map in order to proceed sharing literals.
594 : void EvictFromOptimizedCodeMap(Code* optimized_code, const char* reason);
595 :
596 : // Clear optimized code map.
597 : void ClearOptimizedCodeMap();
598 :
599 : // A native context keeps track of all osrd optimized functions.
600 : inline bool OptimizedCodeMapIsCleared();
601 : Code* SearchOptimizedCodeMap(SharedFunctionInfo* shared,
602 : BailoutId osr_ast_id);
603 : int SearchOptimizedCodeMapEntry(SharedFunctionInfo* shared,
604 : BailoutId osr_ast_id);
605 :
606 : static void AddToOptimizedCodeMap(Handle<Context> native_context,
607 : Handle<SharedFunctionInfo> shared,
608 : Handle<Code> code,
609 : BailoutId osr_ast_id);
610 :
611 : // A native context holds a list of all functions with optimized code.
612 : void AddOptimizedFunction(JSFunction* function);
613 : void RemoveOptimizedFunction(JSFunction* function);
614 : void SetOptimizedFunctionsListHead(Object* head);
615 : Object* OptimizedFunctionsListHead();
616 :
617 : // The native context also stores a list of all optimized code and a
618 : // list of all deoptimized code, which are needed by the deoptimizer.
619 : void AddOptimizedCode(Code* code);
620 : void SetOptimizedCodeListHead(Object* head);
621 : Object* OptimizedCodeListHead();
622 : void SetDeoptimizedCodeListHead(Object* head);
623 : Object* DeoptimizedCodeListHead();
624 :
625 : Handle<Object> ErrorMessageForCodeGenerationFromStrings();
626 :
627 : static int ImportedFieldIndexForName(Handle<String> name);
628 : static int IntrinsicIndexForName(Handle<String> name);
629 : static int IntrinsicIndexForName(const unsigned char* name, int length);
630 :
631 : #define NATIVE_CONTEXT_FIELD_ACCESSORS(index, type, name) \
632 : inline void set_##name(type* value); \
633 : inline bool is_##name(type* value); \
634 : inline type* name();
635 : NATIVE_CONTEXT_FIELDS(NATIVE_CONTEXT_FIELD_ACCESSORS)
636 : #undef NATIVE_CONTEXT_FIELD_ACCESSORS
637 :
638 : // Lookup the slot called name, starting with the current context.
639 : // There are three possibilities:
640 : //
641 : // 1) result->IsContext():
642 : // The binding was found in a context. *index is always the
643 : // non-negative slot index. *attributes is NONE for var and let
644 : // declarations, READ_ONLY for const declarations (never ABSENT).
645 : //
646 : // 2) result->IsJSObject():
647 : // The binding was found as a named property in a context extension
648 : // object (i.e., was introduced via eval), as a property on the subject
649 : // of with, or as a property of the global object. *index is -1 and
650 : // *attributes is not ABSENT.
651 : //
652 : // 3) result.is_null():
653 : // There was no binding found, *index is always -1 and *attributes is
654 : // always ABSENT.
655 : Handle<Object> Lookup(Handle<String> name, ContextLookupFlags flags,
656 : int* index, PropertyAttributes* attributes,
657 : InitializationFlag* init_flag,
658 : VariableMode* variable_mode);
659 :
660 : // Code generation support.
661 : static int SlotOffset(int index) {
662 3919966 : return kHeaderSize + index * kPointerSize - kHeapObjectTag;
663 : }
664 :
665 25955528 : static int FunctionMapIndex(LanguageMode language_mode, FunctionKind kind) {
666 : // Note: Must be kept in sync with the FastNewClosure builtin.
667 25955528 : if (IsGeneratorFunction(kind)) {
668 : return IsAsyncFunction(kind) ? ASYNC_GENERATOR_FUNCTION_MAP_INDEX
669 10429 : : GENERATOR_FUNCTION_MAP_INDEX;
670 : }
671 :
672 25945099 : if (IsAsyncFunction(kind)) {
673 : return ASYNC_FUNCTION_MAP_INDEX;
674 : }
675 :
676 25936744 : if (IsClassConstructor(kind)) {
677 : // Like the strict function map, but with no 'name' accessor. 'name'
678 : // needs to be the last property and it is added during instantiation,
679 : // in case a static property with the same name exists"
680 : return CLASS_FUNCTION_MAP_INDEX;
681 : }
682 :
683 71781942 : if (IsArrowFunction(kind) || IsConciseMethod(kind) ||
684 : IsAccessorFunction(kind)) {
685 : return STRICT_FUNCTION_WITHOUT_PROTOTYPE_MAP_INDEX;
686 : }
687 :
688 : return is_strict(language_mode) ? STRICT_FUNCTION_MAP_INDEX
689 22700188 : : SLOPPY_FUNCTION_MAP_INDEX;
690 : }
691 :
692 : static int ArrayMapIndex(ElementsKind elements_kind) {
693 : DCHECK(IsFastElementsKind(elements_kind));
694 23970906 : return elements_kind + FIRST_JS_ARRAY_MAP_SLOT;
695 : }
696 :
697 : static const int kSize = kHeaderSize + NATIVE_CONTEXT_SLOTS * kPointerSize;
698 : static const int kNotFound = -1;
699 :
700 : // GC support.
701 : typedef FixedBodyDescriptor<
702 : kHeaderSize, kSize, kSize> ScavengeBodyDescriptor;
703 :
704 : typedef FixedBodyDescriptor<
705 : kHeaderSize,
706 : kHeaderSize + FIRST_WEAK_SLOT * kPointerSize,
707 : kSize> MarkCompactBodyDescriptor;
708 :
709 : private:
710 : #ifdef DEBUG
711 : // Bootstrapping-aware type checks.
712 : V8_EXPORT_PRIVATE static bool IsBootstrappingOrNativeContext(Isolate* isolate,
713 : Object* object);
714 : static bool IsBootstrappingOrValidParentContext(Object* object, Context* kid);
715 : #endif
716 :
717 : STATIC_ASSERT(kHeaderSize == Internals::kContextHeaderSize);
718 : STATIC_ASSERT(EMBEDDER_DATA_INDEX == Internals::kContextEmbedderDataIndex);
719 : };
720 :
721 : typedef Context::Field ContextField;
722 :
723 : } // namespace internal
724 : } // namespace v8
725 :
726 : #endif // V8_CONTEXTS_H_
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