cfb5bb726f
Bug: v8:3770 Change-Id: I1d74ffe9e5478b4b8bc0acbf088d20919d458d50 Reviewed-on: https://chromium-review.googlesource.com/c/1363822 Commit-Queue: Jakob Kummerow <jkummerow@chromium.org> Reviewed-by: Jakob Gruber <jgruber@chromium.org> Reviewed-by: Ulan Degenbaev <ulan@chromium.org> Reviewed-by: Andreas Haas <ahaas@chromium.org> Reviewed-by: Toon Verwaest <verwaest@chromium.org> Cr-Commit-Position: refs/heads/master@{#58112}
731 lines
40 KiB
C++
731 lines
40 KiB
C++
// Copyright 2012 the V8 project authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#ifndef V8_CONTEXTS_H_
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#define V8_CONTEXTS_H_
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#include "src/objects/fixed-array.h"
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// Has to be the last include (doesn't have include guards):
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#include "src/objects/object-macros.h"
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namespace v8 {
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namespace internal {
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class JSGlobalObject;
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class JSGlobalProxy;
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class MicrotaskQueue;
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class NativeContext;
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class RegExpMatchInfo;
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enum ContextLookupFlags {
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FOLLOW_CONTEXT_CHAIN = 1 << 0,
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FOLLOW_PROTOTYPE_CHAIN = 1 << 1,
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STOP_AT_DECLARATION_SCOPE = 1 << 2,
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SKIP_WITH_CONTEXT = 1 << 3,
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DONT_FOLLOW_CHAINS = 0,
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FOLLOW_CHAINS = FOLLOW_CONTEXT_CHAIN | FOLLOW_PROTOTYPE_CHAIN,
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};
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// Heap-allocated activation contexts.
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//
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// Contexts are implemented as FixedArray-like objects having a fixed
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// header with a set of common fields.
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//
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// Note: Context must have no virtual functions and Context objects
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// must always be allocated via Heap::AllocateContext() or
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// Factory::NewContext.
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#define NATIVE_CONTEXT_INTRINSIC_FUNCTIONS(V) \
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V(ASYNC_FUNCTION_PROMISE_CREATE_INDEX, JSFunction, \
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async_function_promise_create) \
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V(IS_ARRAYLIKE, JSFunction, is_arraylike) \
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V(GENERATOR_NEXT_INTERNAL, JSFunction, generator_next_internal) \
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V(MAKE_ERROR_INDEX, JSFunction, make_error) \
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V(MAKE_RANGE_ERROR_INDEX, JSFunction, make_range_error) \
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V(MAKE_SYNTAX_ERROR_INDEX, JSFunction, make_syntax_error) \
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V(MAKE_TYPE_ERROR_INDEX, JSFunction, make_type_error) \
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V(MAKE_URI_ERROR_INDEX, JSFunction, make_uri_error) \
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V(OBJECT_CREATE, JSFunction, object_create) \
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V(OBJECT_DEFINE_PROPERTIES, JSFunction, object_define_properties) \
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V(OBJECT_DEFINE_PROPERTY, JSFunction, object_define_property) \
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V(OBJECT_GET_PROTOTYPE_OF, JSFunction, object_get_prototype_of) \
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V(OBJECT_IS_EXTENSIBLE, JSFunction, object_is_extensible) \
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V(OBJECT_IS_FROZEN, JSFunction, object_is_frozen) \
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V(OBJECT_IS_SEALED, JSFunction, object_is_sealed) \
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V(OBJECT_KEYS, JSFunction, object_keys) \
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V(REGEXP_INTERNAL_MATCH, JSFunction, regexp_internal_match) \
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V(REFLECT_APPLY_INDEX, JSFunction, reflect_apply) \
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V(REFLECT_CONSTRUCT_INDEX, JSFunction, reflect_construct) \
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V(REFLECT_DEFINE_PROPERTY_INDEX, JSFunction, reflect_define_property) \
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V(REFLECT_DELETE_PROPERTY_INDEX, JSFunction, reflect_delete_property) \
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V(MATH_FLOOR_INDEX, JSFunction, math_floor) \
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V(MATH_POW_INDEX, JSFunction, math_pow) \
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V(NEW_PROMISE_CAPABILITY_INDEX, JSFunction, new_promise_capability) \
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V(PROMISE_INTERNAL_CONSTRUCTOR_INDEX, JSFunction, \
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promise_internal_constructor) \
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V(IS_PROMISE_INDEX, JSFunction, is_promise) \
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V(PROMISE_THEN_INDEX, JSFunction, promise_then)
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#define NATIVE_CONTEXT_IMPORTED_FIELDS(V) \
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V(ARRAY_ENTRIES_ITERATOR_INDEX, JSFunction, array_entries_iterator) \
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V(ARRAY_FOR_EACH_ITERATOR_INDEX, JSFunction, array_for_each_iterator) \
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V(ARRAY_KEYS_ITERATOR_INDEX, JSFunction, array_keys_iterator) \
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V(ARRAY_VALUES_ITERATOR_INDEX, JSFunction, array_values_iterator) \
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V(ERROR_FUNCTION_INDEX, JSFunction, error_function) \
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V(ERROR_TO_STRING, JSFunction, error_to_string) \
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V(EVAL_ERROR_FUNCTION_INDEX, JSFunction, eval_error_function) \
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V(GLOBAL_EVAL_FUN_INDEX, JSFunction, global_eval_fun) \
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V(GLOBAL_PROXY_FUNCTION_INDEX, JSFunction, global_proxy_function) \
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V(MAP_DELETE_INDEX, JSFunction, map_delete) \
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V(MAP_GET_INDEX, JSFunction, map_get) \
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V(MAP_HAS_INDEX, JSFunction, map_has) \
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V(MAP_SET_INDEX, JSFunction, map_set) \
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V(FUNCTION_HAS_INSTANCE_INDEX, JSFunction, function_has_instance) \
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V(OBJECT_VALUE_OF, JSFunction, object_value_of) \
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V(OBJECT_TO_STRING, JSFunction, object_to_string) \
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V(PROMISE_ALL_INDEX, JSFunction, promise_all) \
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V(PROMISE_CATCH_INDEX, JSFunction, promise_catch) \
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V(PROMISE_FUNCTION_INDEX, JSFunction, promise_function) \
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V(RANGE_ERROR_FUNCTION_INDEX, JSFunction, range_error_function) \
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V(REFERENCE_ERROR_FUNCTION_INDEX, JSFunction, reference_error_function) \
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V(SET_ADD_INDEX, JSFunction, set_add) \
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V(SET_DELETE_INDEX, JSFunction, set_delete) \
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V(SET_HAS_INDEX, JSFunction, set_has) \
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V(SYNTAX_ERROR_FUNCTION_INDEX, JSFunction, syntax_error_function) \
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V(TYPE_ERROR_FUNCTION_INDEX, JSFunction, type_error_function) \
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V(URI_ERROR_FUNCTION_INDEX, JSFunction, uri_error_function) \
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V(WASM_COMPILE_ERROR_FUNCTION_INDEX, JSFunction, \
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wasm_compile_error_function) \
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V(WASM_LINK_ERROR_FUNCTION_INDEX, JSFunction, wasm_link_error_function) \
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V(WASM_RUNTIME_ERROR_FUNCTION_INDEX, JSFunction, \
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wasm_runtime_error_function) \
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V(WEAKMAP_SET_INDEX, JSFunction, weakmap_set) \
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V(WEAKMAP_GET_INDEX, JSFunction, weakmap_get) \
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V(WEAKSET_ADD_INDEX, JSFunction, weakset_add)
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#define NATIVE_CONTEXT_FIELDS(V) \
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V(GLOBAL_PROXY_INDEX, JSGlobalProxy, global_proxy_object) \
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/* TODO(ishell): Actually we store exactly EmbedderDataArray here but */ \
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/* it's already UBSan-fiendly and doesn't require a star... So declare */ \
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/* it as a HeapObject for now. */ \
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V(EMBEDDER_DATA_INDEX, HeapObject, embedder_data) \
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/* Below is alpha-sorted */ \
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V(ACCESSOR_PROPERTY_DESCRIPTOR_MAP_INDEX, Map, \
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accessor_property_descriptor_map) \
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V(ALLOW_CODE_GEN_FROM_STRINGS_INDEX, Object, allow_code_gen_from_strings) \
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V(ARRAY_BUFFER_FUN_INDEX, JSFunction, array_buffer_fun) \
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V(ARRAY_BUFFER_MAP_INDEX, Map, array_buffer_map) \
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V(ARRAY_BUFFER_NOINIT_FUN_INDEX, JSFunction, array_buffer_noinit_fun) \
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V(ARRAY_FUNCTION_INDEX, JSFunction, array_function) \
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V(ARRAY_JOIN_STACK_INDEX, HeapObject, array_join_stack) \
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V(ASYNC_FROM_SYNC_ITERATOR_MAP_INDEX, Map, async_from_sync_iterator_map) \
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V(ASYNC_FUNCTION_AWAIT_REJECT_SHARED_FUN, SharedFunctionInfo, \
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async_function_await_reject_shared_fun) \
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V(ASYNC_FUNCTION_AWAIT_RESOLVE_SHARED_FUN, SharedFunctionInfo, \
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async_function_await_resolve_shared_fun) \
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V(ASYNC_FUNCTION_FUNCTION_INDEX, JSFunction, async_function_constructor) \
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V(ASYNC_FUNCTION_OBJECT_MAP_INDEX, Map, async_function_object_map) \
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V(ASYNC_GENERATOR_FUNCTION_FUNCTION_INDEX, JSFunction, \
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async_generator_function_function) \
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V(ASYNC_ITERATOR_VALUE_UNWRAP_SHARED_FUN, SharedFunctionInfo, \
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async_iterator_value_unwrap_shared_fun) \
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V(ASYNC_GENERATOR_AWAIT_REJECT_SHARED_FUN, SharedFunctionInfo, \
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async_generator_await_reject_shared_fun) \
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V(ASYNC_GENERATOR_AWAIT_RESOLVE_SHARED_FUN, SharedFunctionInfo, \
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async_generator_await_resolve_shared_fun) \
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V(ASYNC_GENERATOR_YIELD_RESOLVE_SHARED_FUN, SharedFunctionInfo, \
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async_generator_yield_resolve_shared_fun) \
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V(ASYNC_GENERATOR_RETURN_RESOLVE_SHARED_FUN, SharedFunctionInfo, \
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async_generator_return_resolve_shared_fun) \
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V(ASYNC_GENERATOR_RETURN_CLOSED_RESOLVE_SHARED_FUN, SharedFunctionInfo, \
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async_generator_return_closed_resolve_shared_fun) \
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V(ASYNC_GENERATOR_RETURN_CLOSED_REJECT_SHARED_FUN, SharedFunctionInfo, \
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async_generator_return_closed_reject_shared_fun) \
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V(ATOMICS_OBJECT, JSObject, atomics_object) \
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V(BIGINT_FUNCTION_INDEX, JSFunction, bigint_function) \
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V(BIGINT64_ARRAY_FUN_INDEX, JSFunction, bigint64_array_fun) \
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V(BIGUINT64_ARRAY_FUN_INDEX, JSFunction, biguint64_array_fun) \
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V(BOOLEAN_FUNCTION_INDEX, JSFunction, boolean_function) \
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V(BOUND_FUNCTION_WITH_CONSTRUCTOR_MAP_INDEX, Map, \
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bound_function_with_constructor_map) \
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V(BOUND_FUNCTION_WITHOUT_CONSTRUCTOR_MAP_INDEX, Map, \
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bound_function_without_constructor_map) \
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V(CALL_AS_CONSTRUCTOR_DELEGATE_INDEX, JSFunction, \
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call_as_constructor_delegate) \
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V(CALL_AS_FUNCTION_DELEGATE_INDEX, JSFunction, call_as_function_delegate) \
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V(CALLSITE_FUNCTION_INDEX, JSFunction, callsite_function) \
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V(CONTEXT_EXTENSION_FUNCTION_INDEX, JSFunction, context_extension_function) \
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V(DATA_PROPERTY_DESCRIPTOR_MAP_INDEX, Map, data_property_descriptor_map) \
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V(DATA_VIEW_FUN_INDEX, JSFunction, data_view_fun) \
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V(DATE_FUNCTION_INDEX, JSFunction, date_function) \
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V(DEBUG_CONTEXT_ID_INDEX, Object, debug_context_id) \
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V(EMPTY_FUNCTION_INDEX, JSFunction, empty_function) \
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V(ERROR_MESSAGE_FOR_CODE_GEN_FROM_STRINGS_INDEX, Object, \
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error_message_for_code_gen_from_strings) \
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V(ERRORS_THROWN_INDEX, Smi, errors_thrown) \
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V(EXTRAS_EXPORTS_OBJECT_INDEX, JSObject, extras_binding_object) \
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V(EXTRAS_UTILS_OBJECT_INDEX, Object, extras_utils_object) \
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V(FAST_ALIASED_ARGUMENTS_MAP_INDEX, Map, fast_aliased_arguments_map) \
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V(FAST_TEMPLATE_INSTANTIATIONS_CACHE_INDEX, FixedArray, \
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fast_template_instantiations_cache) \
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V(FLOAT32_ARRAY_FUN_INDEX, JSFunction, float32_array_fun) \
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V(FLOAT64_ARRAY_FUN_INDEX, JSFunction, float64_array_fun) \
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V(FUNCTION_FUNCTION_INDEX, JSFunction, function_function) \
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V(GENERATOR_FUNCTION_FUNCTION_INDEX, JSFunction, \
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generator_function_function) \
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V(GENERATOR_OBJECT_PROTOTYPE_MAP_INDEX, Map, generator_object_prototype_map) \
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V(ASYNC_GENERATOR_OBJECT_PROTOTYPE_MAP_INDEX, Map, \
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async_generator_object_prototype_map) \
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V(INITIAL_ARRAY_ITERATOR_MAP_INDEX, Map, initial_array_iterator_map) \
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V(INITIAL_ARRAY_ITERATOR_PROTOTYPE_INDEX, JSObject, \
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initial_array_iterator_prototype) \
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V(INITIAL_ARRAY_PROTOTYPE_INDEX, JSObject, initial_array_prototype) \
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V(INITIAL_ERROR_PROTOTYPE_INDEX, JSObject, initial_error_prototype) \
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V(INITIAL_GENERATOR_PROTOTYPE_INDEX, JSObject, initial_generator_prototype) \
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V(INITIAL_ASYNC_GENERATOR_PROTOTYPE_INDEX, JSObject, \
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initial_async_generator_prototype) \
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V(INITIAL_ITERATOR_PROTOTYPE_INDEX, JSObject, initial_iterator_prototype) \
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V(INITIAL_MAP_ITERATOR_PROTOTYPE_INDEX, JSObject, \
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initial_map_iterator_prototype) \
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V(INITIAL_MAP_PROTOTYPE_MAP_INDEX, Map, initial_map_prototype_map) \
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V(INITIAL_OBJECT_PROTOTYPE_INDEX, JSObject, initial_object_prototype) \
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V(INITIAL_SET_ITERATOR_PROTOTYPE_INDEX, JSObject, \
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initial_set_iterator_prototype) \
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V(INITIAL_SET_PROTOTYPE_INDEX, JSObject, initial_set_prototype) \
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V(INITIAL_SET_PROTOTYPE_MAP_INDEX, Map, initial_set_prototype_map) \
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V(INITIAL_STRING_ITERATOR_MAP_INDEX, Map, initial_string_iterator_map) \
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V(INITIAL_STRING_ITERATOR_PROTOTYPE_INDEX, JSObject, \
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initial_string_iterator_prototype) \
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V(INITIAL_STRING_PROTOTYPE_INDEX, JSObject, initial_string_prototype) \
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V(INITIAL_WEAKMAP_PROTOTYPE_MAP_INDEX, Map, initial_weakmap_prototype_map) \
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V(INITIAL_WEAKSET_PROTOTYPE_MAP_INDEX, Map, initial_weakset_prototype_map) \
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V(INT16_ARRAY_FUN_INDEX, JSFunction, int16_array_fun) \
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V(INT32_ARRAY_FUN_INDEX, JSFunction, int32_array_fun) \
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V(INT8_ARRAY_FUN_INDEX, JSFunction, int8_array_fun) \
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V(INTERNAL_ARRAY_FUNCTION_INDEX, JSFunction, internal_array_function) \
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V(INTL_COLLATOR_FUNCTION_INDEX, JSFunction, intl_collator_function) \
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V(INTL_DATE_TIME_FORMAT_FUNCTION_INDEX, JSFunction, \
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intl_date_time_format_function) \
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V(INTL_NUMBER_FORMAT_FUNCTION_INDEX, JSFunction, \
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intl_number_format_function) \
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V(INTL_LOCALE_FUNCTION_INDEX, JSFunction, intl_locale_function) \
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V(INTL_SEGMENT_ITERATOR_MAP_INDEX, Map, intl_segment_iterator_map) \
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V(ITERATOR_RESULT_MAP_INDEX, Map, iterator_result_map) \
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V(JS_ARRAY_PACKED_SMI_ELEMENTS_MAP_INDEX, Map, \
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js_array_packed_smi_elements_map) \
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V(JS_ARRAY_HOLEY_SMI_ELEMENTS_MAP_INDEX, Map, \
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js_array_holey_smi_elements_map) \
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V(JS_ARRAY_PACKED_ELEMENTS_MAP_INDEX, Map, js_array_packed_elements_map) \
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V(JS_ARRAY_HOLEY_ELEMENTS_MAP_INDEX, Map, js_array_holey_elements_map) \
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V(JS_ARRAY_PACKED_DOUBLE_ELEMENTS_MAP_INDEX, Map, \
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js_array_packed_double_elements_map) \
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V(JS_ARRAY_HOLEY_DOUBLE_ELEMENTS_MAP_INDEX, Map, \
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js_array_holey_double_elements_map) \
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V(JS_MAP_FUN_INDEX, JSFunction, js_map_fun) \
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V(JS_MAP_MAP_INDEX, Map, js_map_map) \
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V(JS_MODULE_NAMESPACE_MAP, Map, js_module_namespace_map) \
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V(JS_SET_FUN_INDEX, JSFunction, js_set_fun) \
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V(JS_SET_MAP_INDEX, Map, js_set_map) \
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V(JS_WEAK_CELL_MAP_INDEX, Map, js_weak_cell_map) \
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V(JS_WEAK_FACTORY_CLEANUP_ITERATOR_MAP_INDEX, Map, \
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js_weak_factory_cleanup_iterator_map) \
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V(JS_WEAK_MAP_FUN_INDEX, JSFunction, js_weak_map_fun) \
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V(JS_WEAK_REF_MAP_INDEX, Map, js_weak_ref_map) \
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V(JS_WEAK_SET_FUN_INDEX, JSFunction, js_weak_set_fun) \
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V(MAP_CACHE_INDEX, Object, map_cache) \
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V(MAP_KEY_ITERATOR_MAP_INDEX, Map, map_key_iterator_map) \
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V(MAP_KEY_VALUE_ITERATOR_MAP_INDEX, Map, map_key_value_iterator_map) \
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V(MAP_VALUE_ITERATOR_MAP_INDEX, Map, map_value_iterator_map) \
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V(MATH_RANDOM_INDEX_INDEX, Smi, math_random_index) \
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V(MATH_RANDOM_STATE_INDEX, ByteArray, math_random_state) \
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V(MATH_RANDOM_CACHE_INDEX, FixedDoubleArray, math_random_cache) \
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V(MESSAGE_LISTENERS_INDEX, TemplateList, message_listeners) \
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V(NATIVES_UTILS_OBJECT_INDEX, Object, natives_utils_object) \
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V(NORMALIZED_MAP_CACHE_INDEX, Object, normalized_map_cache) \
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V(NUMBER_FUNCTION_INDEX, JSFunction, number_function) \
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V(OBJECT_FUNCTION_INDEX, JSFunction, object_function) \
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V(OBJECT_FUNCTION_PROTOTYPE_MAP_INDEX, Map, object_function_prototype_map) \
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V(OPAQUE_REFERENCE_FUNCTION_INDEX, JSFunction, opaque_reference_function) \
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V(PROXY_CALLABLE_MAP_INDEX, Map, proxy_callable_map) \
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V(PROXY_CONSTRUCTOR_MAP_INDEX, Map, proxy_constructor_map) \
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V(PROXY_FUNCTION_INDEX, JSFunction, proxy_function) \
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V(PROXY_MAP_INDEX, Map, proxy_map) \
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V(PROXY_REVOCABLE_RESULT_MAP_INDEX, Map, proxy_revocable_result_map) \
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V(PROXY_REVOKE_SHARED_FUN, SharedFunctionInfo, proxy_revoke_shared_fun) \
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V(PROMISE_GET_CAPABILITIES_EXECUTOR_SHARED_FUN, SharedFunctionInfo, \
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promise_get_capabilities_executor_shared_fun) \
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V(PROMISE_CAPABILITY_DEFAULT_REJECT_SHARED_FUN_INDEX, SharedFunctionInfo, \
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promise_capability_default_reject_shared_fun) \
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V(PROMISE_CAPABILITY_DEFAULT_RESOLVE_SHARED_FUN_INDEX, SharedFunctionInfo, \
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promise_capability_default_resolve_shared_fun) \
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V(PROMISE_THEN_FINALLY_SHARED_FUN, SharedFunctionInfo, \
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promise_then_finally_shared_fun) \
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V(PROMISE_CATCH_FINALLY_SHARED_FUN, SharedFunctionInfo, \
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promise_catch_finally_shared_fun) \
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V(PROMISE_VALUE_THUNK_FINALLY_SHARED_FUN, SharedFunctionInfo, \
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promise_value_thunk_finally_shared_fun) \
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V(PROMISE_THROWER_FINALLY_SHARED_FUN, SharedFunctionInfo, \
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promise_thrower_finally_shared_fun) \
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V(PROMISE_ALL_RESOLVE_ELEMENT_SHARED_FUN, SharedFunctionInfo, \
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promise_all_resolve_element_shared_fun) \
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V(PROMISE_PROTOTYPE_INDEX, JSObject, promise_prototype) \
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V(REGEXP_EXEC_FUNCTION_INDEX, JSFunction, regexp_exec_function) \
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V(REGEXP_FUNCTION_INDEX, JSFunction, regexp_function) \
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V(REGEXP_LAST_MATCH_INFO_INDEX, RegExpMatchInfo, regexp_last_match_info) \
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V(REGEXP_INTERNAL_MATCH_INFO_INDEX, RegExpMatchInfo, \
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regexp_internal_match_info) \
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V(REGEXP_PROTOTYPE_MAP_INDEX, Map, regexp_prototype_map) \
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V(INITIAL_REGEXP_STRING_ITERATOR_PROTOTYPE_MAP_INDEX, Map, \
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initial_regexp_string_iterator_prototype_map) \
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V(REGEXP_RESULT_MAP_INDEX, Map, regexp_result_map) \
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V(REGEXP_PROTOTYPE_INDEX, JSObject, regexp_prototype) \
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V(SCRIPT_CONTEXT_TABLE_INDEX, ScriptContextTable, script_context_table) \
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V(SECURITY_TOKEN_INDEX, Object, security_token) \
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V(SERIALIZED_OBJECTS, FixedArray, serialized_objects) \
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V(SET_VALUE_ITERATOR_MAP_INDEX, Map, set_value_iterator_map) \
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V(SET_KEY_VALUE_ITERATOR_MAP_INDEX, Map, set_key_value_iterator_map) \
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V(SHARED_ARRAY_BUFFER_FUN_INDEX, JSFunction, shared_array_buffer_fun) \
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V(SLOPPY_ARGUMENTS_MAP_INDEX, Map, sloppy_arguments_map) \
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V(SLOW_ALIASED_ARGUMENTS_MAP_INDEX, Map, slow_aliased_arguments_map) \
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V(STRICT_ARGUMENTS_MAP_INDEX, Map, strict_arguments_map) \
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V(SLOW_OBJECT_WITH_NULL_PROTOTYPE_MAP, Map, \
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slow_object_with_null_prototype_map) \
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V(SLOW_OBJECT_WITH_OBJECT_PROTOTYPE_MAP, Map, \
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slow_object_with_object_prototype_map) \
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V(SLOW_TEMPLATE_INSTANTIATIONS_CACHE_INDEX, SimpleNumberDictionary, \
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slow_template_instantiations_cache) \
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/* All *_FUNCTION_MAP_INDEX definitions used by Context::FunctionMapIndex */ \
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/* must remain together. */ \
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V(SLOPPY_FUNCTION_MAP_INDEX, Map, sloppy_function_map) \
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V(SLOPPY_FUNCTION_WITH_NAME_MAP_INDEX, Map, sloppy_function_with_name_map) \
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V(SLOPPY_FUNCTION_WITHOUT_PROTOTYPE_MAP_INDEX, Map, \
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sloppy_function_without_prototype_map) \
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V(SLOPPY_FUNCTION_WITH_READONLY_PROTOTYPE_MAP_INDEX, Map, \
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|
sloppy_function_with_readonly_prototype_map) \
|
|
V(STRICT_FUNCTION_MAP_INDEX, Map, strict_function_map) \
|
|
V(STRICT_FUNCTION_WITH_NAME_MAP_INDEX, Map, strict_function_with_name_map) \
|
|
V(STRICT_FUNCTION_WITH_READONLY_PROTOTYPE_MAP_INDEX, Map, \
|
|
strict_function_with_readonly_prototype_map) \
|
|
V(STRICT_FUNCTION_WITHOUT_PROTOTYPE_MAP_INDEX, Map, \
|
|
strict_function_without_prototype_map) \
|
|
V(METHOD_WITH_NAME_MAP_INDEX, Map, method_with_name_map) \
|
|
V(METHOD_WITH_HOME_OBJECT_MAP_INDEX, Map, method_with_home_object_map) \
|
|
V(METHOD_WITH_NAME_AND_HOME_OBJECT_MAP_INDEX, Map, \
|
|
method_with_name_and_home_object_map) \
|
|
V(ASYNC_FUNCTION_MAP_INDEX, Map, async_function_map) \
|
|
V(ASYNC_FUNCTION_WITH_NAME_MAP_INDEX, Map, async_function_with_name_map) \
|
|
V(ASYNC_FUNCTION_WITH_HOME_OBJECT_MAP_INDEX, Map, \
|
|
async_function_with_home_object_map) \
|
|
V(ASYNC_FUNCTION_WITH_NAME_AND_HOME_OBJECT_MAP_INDEX, Map, \
|
|
async_function_with_name_and_home_object_map) \
|
|
V(GENERATOR_FUNCTION_MAP_INDEX, Map, generator_function_map) \
|
|
V(GENERATOR_FUNCTION_WITH_NAME_MAP_INDEX, Map, \
|
|
generator_function_with_name_map) \
|
|
V(GENERATOR_FUNCTION_WITH_HOME_OBJECT_MAP_INDEX, Map, \
|
|
generator_function_with_home_object_map) \
|
|
V(GENERATOR_FUNCTION_WITH_NAME_AND_HOME_OBJECT_MAP_INDEX, Map, \
|
|
generator_function_with_name_and_home_object_map) \
|
|
V(ASYNC_GENERATOR_FUNCTION_MAP_INDEX, Map, async_generator_function_map) \
|
|
V(ASYNC_GENERATOR_FUNCTION_WITH_NAME_MAP_INDEX, Map, \
|
|
async_generator_function_with_name_map) \
|
|
V(ASYNC_GENERATOR_FUNCTION_WITH_HOME_OBJECT_MAP_INDEX, Map, \
|
|
async_generator_function_with_home_object_map) \
|
|
V(ASYNC_GENERATOR_FUNCTION_WITH_NAME_AND_HOME_OBJECT_MAP_INDEX, Map, \
|
|
async_generator_function_with_name_and_home_object_map) \
|
|
V(CLASS_FUNCTION_MAP_INDEX, Map, class_function_map) \
|
|
V(STRING_FUNCTION_INDEX, JSFunction, string_function) \
|
|
V(STRING_FUNCTION_PROTOTYPE_MAP_INDEX, Map, string_function_prototype_map) \
|
|
V(SYMBOL_FUNCTION_INDEX, JSFunction, symbol_function) \
|
|
V(NATIVE_FUNCTION_MAP_INDEX, Map, native_function_map) \
|
|
V(WASM_EXCEPTION_CONSTRUCTOR_INDEX, JSFunction, wasm_exception_constructor) \
|
|
V(WASM_GLOBAL_CONSTRUCTOR_INDEX, JSFunction, wasm_global_constructor) \
|
|
V(WASM_INSTANCE_CONSTRUCTOR_INDEX, JSFunction, wasm_instance_constructor) \
|
|
V(WASM_MEMORY_CONSTRUCTOR_INDEX, JSFunction, wasm_memory_constructor) \
|
|
V(WASM_MODULE_CONSTRUCTOR_INDEX, JSFunction, wasm_module_constructor) \
|
|
V(WASM_TABLE_CONSTRUCTOR_INDEX, JSFunction, wasm_table_constructor) \
|
|
V(TYPED_ARRAY_FUN_INDEX, JSFunction, typed_array_function) \
|
|
V(TYPED_ARRAY_PROTOTYPE_INDEX, JSObject, typed_array_prototype) \
|
|
V(UINT16_ARRAY_FUN_INDEX, JSFunction, uint16_array_fun) \
|
|
V(UINT32_ARRAY_FUN_INDEX, JSFunction, uint32_array_fun) \
|
|
V(UINT8_ARRAY_FUN_INDEX, JSFunction, uint8_array_fun) \
|
|
V(UINT8_CLAMPED_ARRAY_FUN_INDEX, JSFunction, uint8_clamped_array_fun) \
|
|
NATIVE_CONTEXT_INTRINSIC_FUNCTIONS(V) \
|
|
NATIVE_CONTEXT_IMPORTED_FIELDS(V)
|
|
|
|
// A table of all script contexts. Every loaded top-level script with top-level
|
|
// lexical declarations contributes its ScriptContext into this table.
|
|
//
|
|
// The table is a fixed array, its first slot is the current used count and
|
|
// the subsequent slots 1..used contain ScriptContexts.
|
|
class ScriptContextTable : public FixedArray {
|
|
public:
|
|
DECL_CAST2(ScriptContextTable)
|
|
|
|
struct LookupResult {
|
|
int context_index;
|
|
int slot_index;
|
|
VariableMode mode;
|
|
InitializationFlag init_flag;
|
|
MaybeAssignedFlag maybe_assigned_flag;
|
|
};
|
|
|
|
inline int used() const;
|
|
inline void set_used(int used);
|
|
|
|
static inline Handle<Context> GetContext(Isolate* isolate,
|
|
Handle<ScriptContextTable> table,
|
|
int i);
|
|
|
|
// Lookup a variable `name` in a ScriptContextTable.
|
|
// If it returns true, the variable is found and `result` contains
|
|
// valid information about its location.
|
|
// If it returns false, `result` is untouched.
|
|
V8_WARN_UNUSED_RESULT
|
|
static bool Lookup(Isolate* isolate, Handle<ScriptContextTable> table,
|
|
Handle<String> name, LookupResult* result);
|
|
|
|
V8_WARN_UNUSED_RESULT
|
|
static Handle<ScriptContextTable> Extend(Handle<ScriptContextTable> table,
|
|
Handle<Context> script_context);
|
|
|
|
static const int kUsedSlotIndex = 0;
|
|
static const int kFirstContextSlotIndex = 1;
|
|
static const int kMinLength = kFirstContextSlotIndex;
|
|
|
|
OBJECT_CONSTRUCTORS(ScriptContextTable, FixedArray);
|
|
};
|
|
|
|
// JSFunctions are pairs (context, function code), sometimes also called
|
|
// closures. A Context object is used to represent function contexts and
|
|
// dynamically pushed 'with' contexts (or 'scopes' in ECMA-262 speak).
|
|
//
|
|
// At runtime, the contexts build a stack in parallel to the execution
|
|
// stack, with the top-most context being the current context. All contexts
|
|
// have the following slots:
|
|
//
|
|
// [ scope_info ] This is the scope info describing the current context. It
|
|
// contains the names of statically allocated context slots,
|
|
// and stack-allocated locals. The names are needed for
|
|
// dynamic lookups in the presence of 'with' or 'eval', and
|
|
// for the debugger.
|
|
//
|
|
// [ previous ] A pointer to the previous context.
|
|
//
|
|
// [ extension ] Additional data.
|
|
//
|
|
// For native contexts, it contains the global object.
|
|
// For module contexts, it contains the module object.
|
|
// For await contexts, it contains the generator object.
|
|
// For block contexts, it may contain an "extension object".
|
|
// For with contexts, it contains an "extension object".
|
|
//
|
|
// An "extension object" is used to dynamically extend a
|
|
// context with additional variables, namely in the
|
|
// implementation of the 'with' construct and the 'eval'
|
|
// construct. For instance, Context::Lookup also searches
|
|
// the extension object for properties. (Storing the
|
|
// extension object is the original purpose of this context
|
|
// slot, hence the name.)
|
|
//
|
|
// [ native_context ] A pointer to the native context.
|
|
//
|
|
// In addition, function contexts may have statically allocated context slots
|
|
// to store local variables/functions that are accessed from inner functions
|
|
// (via static context addresses) or through 'eval' (dynamic context lookups).
|
|
// The native context contains additional slots for fast access to native
|
|
// properties.
|
|
//
|
|
// Finally, with Harmony scoping, the JSFunction representing a top level
|
|
// script will have the ScriptContext rather than a FunctionContext.
|
|
// Script contexts from all top-level scripts are gathered in
|
|
// ScriptContextTable.
|
|
|
|
class Context : public HeapObjectPtr {
|
|
public:
|
|
NEVER_READ_ONLY_SPACE
|
|
|
|
DECL_CAST2(Context)
|
|
|
|
// [length]: length of the context.
|
|
V8_INLINE int length() const;
|
|
V8_INLINE void set_length(int value);
|
|
|
|
// Setter and getter for elements.
|
|
V8_INLINE Object* get(int index) const;
|
|
V8_INLINE void set(int index, Object* value);
|
|
// Setter with explicit barrier mode.
|
|
V8_INLINE void set(int index, Object* value, WriteBarrierMode mode);
|
|
|
|
// Layout description.
|
|
#define CONTEXT_FIELDS(V) \
|
|
V(kLengthOffset, kTaggedSize) \
|
|
/* TODO(ishell): remove this fixedArray-like header size. */ \
|
|
V(kHeaderSize, 0) \
|
|
V(kStartOfTaggedFieldsOffset, 0) \
|
|
V(kStartOfStrongFieldsOffset, 0) \
|
|
/* Tagged fields. */ \
|
|
V(kScopeInfoOffset, kTaggedSize) \
|
|
V(kPreviousOffset, kTaggedSize) \
|
|
V(kExtensionOffset, kTaggedSize) \
|
|
V(kNativeContextOffset, kTaggedSize) \
|
|
/* Header size. */ \
|
|
/* TODO(ishell): use this as header size once MIN_CONTEXT_SLOTS */ \
|
|
/* is removed in favour of offset-based access to common fields. */ \
|
|
V(kTodoHeaderSize, 0)
|
|
|
|
DEFINE_FIELD_OFFSET_CONSTANTS(HeapObject::kHeaderSize, CONTEXT_FIELDS)
|
|
#undef CONTEXT_FIELDS
|
|
|
|
// Garbage collection support.
|
|
V8_INLINE static constexpr int SizeFor(int length) {
|
|
// TODO(ishell): switch to kTodoHeaderSize based approach once we no longer
|
|
// reference common Context fields via index
|
|
return kHeaderSize + length * kTaggedSize;
|
|
}
|
|
|
|
// Code Generation support.
|
|
// Offset of the element from the beginning of object.
|
|
V8_INLINE static constexpr int OffsetOfElementAt(int index) {
|
|
return SizeFor(index);
|
|
}
|
|
// Offset of the element from the heap object pointer.
|
|
V8_INLINE static constexpr int SlotOffset(int index) {
|
|
return SizeFor(index) - kHeapObjectTag;
|
|
}
|
|
|
|
// TODO(ishell): eventually migrate to the offset based access instead of
|
|
// index-based.
|
|
// The default context slot layout; indices are FixedArray slot indices.
|
|
enum Field {
|
|
// TODO(shell): use offset-based approach for accessing common values.
|
|
// These slots are in all contexts.
|
|
SCOPE_INFO_INDEX,
|
|
PREVIOUS_INDEX,
|
|
EXTENSION_INDEX,
|
|
NATIVE_CONTEXT_INDEX,
|
|
|
|
// These slots are only in native contexts.
|
|
#define NATIVE_CONTEXT_SLOT(index, type, name) index,
|
|
NATIVE_CONTEXT_FIELDS(NATIVE_CONTEXT_SLOT)
|
|
#undef NATIVE_CONTEXT_SLOT
|
|
|
|
// Properties from here are treated as weak references by the full GC.
|
|
// Scavenge treats them as strong references.
|
|
OPTIMIZED_CODE_LIST, // Weak.
|
|
DEOPTIMIZED_CODE_LIST, // Weak.
|
|
NEXT_CONTEXT_LINK, // Weak.
|
|
|
|
// Total number of slots.
|
|
NATIVE_CONTEXT_SLOTS,
|
|
FIRST_WEAK_SLOT = OPTIMIZED_CODE_LIST,
|
|
FIRST_JS_ARRAY_MAP_SLOT = JS_ARRAY_PACKED_SMI_ELEMENTS_MAP_INDEX,
|
|
|
|
// TODO(shell): Remove, once it becomes zero
|
|
MIN_CONTEXT_SLOTS = GLOBAL_PROXY_INDEX,
|
|
|
|
// This slot holds the thrown value in catch contexts.
|
|
THROWN_OBJECT_INDEX = MIN_CONTEXT_SLOTS,
|
|
|
|
// These slots hold values in debug evaluate contexts.
|
|
WRAPPED_CONTEXT_INDEX = MIN_CONTEXT_SLOTS,
|
|
WHITE_LIST_INDEX = MIN_CONTEXT_SLOTS + 1
|
|
};
|
|
|
|
// A region of native context entries containing maps for functions created
|
|
// by Builtins::kFastNewClosure.
|
|
static const int FIRST_FUNCTION_MAP_INDEX = SLOPPY_FUNCTION_MAP_INDEX;
|
|
static const int LAST_FUNCTION_MAP_INDEX = CLASS_FUNCTION_MAP_INDEX;
|
|
|
|
static const int kNoContext = 0;
|
|
static const int kInvalidContext = 1;
|
|
|
|
void ResetErrorsThrown();
|
|
void IncrementErrorsThrown();
|
|
int GetErrorsThrown();
|
|
|
|
// Direct slot access.
|
|
inline void set_scope_info(ScopeInfo scope_info);
|
|
inline Context previous();
|
|
inline void set_previous(Context context);
|
|
|
|
inline Object* next_context_link();
|
|
|
|
inline bool has_extension();
|
|
inline HeapObject* extension();
|
|
inline void set_extension(HeapObject* object);
|
|
JSObject extension_object();
|
|
JSReceiver extension_receiver();
|
|
ScopeInfo scope_info();
|
|
|
|
// Find the module context (assuming there is one) and return the associated
|
|
// module object.
|
|
Module* module();
|
|
|
|
// Get the context where var declarations will be hoisted to, which
|
|
// may be the context itself.
|
|
Context declaration_context();
|
|
bool is_declaration_context();
|
|
|
|
// Get the next closure's context on the context chain.
|
|
Context closure_context();
|
|
|
|
// Returns a JSGlobalProxy object or null.
|
|
JSGlobalProxy global_proxy();
|
|
void set_global_proxy(JSGlobalProxy global);
|
|
|
|
// Get the JSGlobalObject object.
|
|
V8_EXPORT_PRIVATE JSGlobalObject global_object();
|
|
|
|
// Get the script context by traversing the context chain.
|
|
Context script_context();
|
|
|
|
// Compute the native context.
|
|
inline NativeContext native_context() const;
|
|
inline void set_native_context(NativeContext context);
|
|
|
|
// Predicates for context types. IsNativeContext is already defined on
|
|
// Object.
|
|
inline bool IsFunctionContext() const;
|
|
inline bool IsCatchContext() const;
|
|
inline bool IsWithContext() const;
|
|
inline bool IsDebugEvaluateContext() const;
|
|
inline bool IsAwaitContext() const;
|
|
inline bool IsBlockContext() const;
|
|
inline bool IsModuleContext() const;
|
|
inline bool IsEvalContext() const;
|
|
inline bool IsScriptContext() const;
|
|
|
|
inline bool HasSameSecurityTokenAs(Context that) const;
|
|
|
|
// The native context also stores a list of all optimized code and a
|
|
// list of all deoptimized code, which are needed by the deoptimizer.
|
|
void AddOptimizedCode(Code code);
|
|
void SetOptimizedCodeListHead(Object* head);
|
|
Object* OptimizedCodeListHead();
|
|
void SetDeoptimizedCodeListHead(Object* head);
|
|
Object* DeoptimizedCodeListHead();
|
|
|
|
Handle<Object> ErrorMessageForCodeGenerationFromStrings();
|
|
|
|
static int ImportedFieldIndexForName(Handle<String> name);
|
|
static int IntrinsicIndexForName(Handle<String> name);
|
|
static int IntrinsicIndexForName(const unsigned char* name, int length);
|
|
|
|
#define NATIVE_CONTEXT_FIELD_ACCESSORS(index, type, name) \
|
|
inline void set_##name(type##ArgType value); \
|
|
inline bool is_##name(type##ArgType value) const; \
|
|
inline type##ArgType name() const;
|
|
NATIVE_CONTEXT_FIELDS(NATIVE_CONTEXT_FIELD_ACCESSORS)
|
|
#undef NATIVE_CONTEXT_FIELD_ACCESSORS
|
|
|
|
// Lookup the slot called name, starting with the current context.
|
|
// There are three possibilities:
|
|
//
|
|
// 1) result->IsContext():
|
|
// The binding was found in a context. *index is always the
|
|
// non-negative slot index. *attributes is NONE for var and let
|
|
// declarations, READ_ONLY for const declarations (never ABSENT).
|
|
//
|
|
// 2) result->IsJSObject():
|
|
// The binding was found as a named property in a context extension
|
|
// object (i.e., was introduced via eval), as a property on the subject
|
|
// of with, or as a property of the global object. *index is -1 and
|
|
// *attributes is not ABSENT.
|
|
//
|
|
// 3) result->IsModule():
|
|
// The binding was found in module imports or exports.
|
|
// *attributes is never ABSENT. imports are READ_ONLY.
|
|
//
|
|
// 4) result.is_null():
|
|
// There was no binding found, *index is always -1 and *attributes is
|
|
// always ABSENT.
|
|
Handle<Object> Lookup(Handle<String> name, ContextLookupFlags flags,
|
|
int* index, PropertyAttributes* attributes,
|
|
InitializationFlag* init_flag,
|
|
VariableMode* variable_mode,
|
|
bool* is_sloppy_function_name = nullptr);
|
|
|
|
static inline int FunctionMapIndex(LanguageMode language_mode,
|
|
FunctionKind kind, bool has_prototype_slot,
|
|
bool has_shared_name,
|
|
bool needs_home_object);
|
|
|
|
static int ArrayMapIndex(ElementsKind elements_kind) {
|
|
DCHECK(IsFastElementsKind(elements_kind));
|
|
return elements_kind + FIRST_JS_ARRAY_MAP_SLOT;
|
|
}
|
|
|
|
inline Map GetInitialJSArrayMap(ElementsKind kind) const;
|
|
|
|
static const int kNotFound = -1;
|
|
|
|
// Dispatched behavior.
|
|
DECL_PRINTER(Context)
|
|
DECL_VERIFIER(Context)
|
|
|
|
typedef FlexibleBodyDescriptor<kStartOfTaggedFieldsOffset> BodyDescriptor;
|
|
|
|
private:
|
|
#ifdef DEBUG
|
|
// Bootstrapping-aware type checks.
|
|
V8_EXPORT_PRIVATE static bool IsBootstrappingOrNativeContext(Isolate* isolate,
|
|
Object* object);
|
|
static bool IsBootstrappingOrValidParentContext(Object* object, Context kid);
|
|
#endif
|
|
|
|
OBJECT_CONSTRUCTORS(Context, HeapObjectPtr)
|
|
};
|
|
|
|
class NativeContext : public Context {
|
|
public:
|
|
DECL_CAST2(NativeContext)
|
|
// TODO(neis): Move some stuff from Context here.
|
|
|
|
// [microtask_queue]: pointer to the MicrotaskQueue object.
|
|
DECL_PRIMITIVE_ACCESSORS(microtask_queue, MicrotaskQueue*)
|
|
|
|
// Dispatched behavior.
|
|
DECL_PRINTER(NativeContext)
|
|
DECL_VERIFIER(NativeContext)
|
|
|
|
// Layout description.
|
|
#define NATIVE_CONTEXT_FIELDS_DEF(V) \
|
|
/* TODO(ishell): move definition of common context offsets to Context. */ \
|
|
V(kStartOfNativeContextFieldsOffset, \
|
|
(FIRST_WEAK_SLOT - MIN_CONTEXT_SLOTS) * kTaggedSize) \
|
|
V(kEndOfStrongFieldsOffset, 0) \
|
|
V(kStartOfWeakFieldsOffset, \
|
|
(NATIVE_CONTEXT_SLOTS - FIRST_WEAK_SLOT) * kTaggedSize) \
|
|
V(kEndOfWeakFieldsOffset, 0) \
|
|
V(kEndOfNativeContextFieldsOffset, 0) \
|
|
V(kEndOfTaggedFieldsOffset, 0) \
|
|
/* Raw data. */ \
|
|
V(kMicrotaskQueueOffset, kSystemPointerSize) \
|
|
/* Total size. */ \
|
|
V(kSize, 0)
|
|
|
|
DEFINE_FIELD_OFFSET_CONSTANTS(Context::kTodoHeaderSize,
|
|
NATIVE_CONTEXT_FIELDS_DEF)
|
|
#undef NATIVE_CONTEXT_FIELDS_DEF
|
|
|
|
class BodyDescriptor;
|
|
|
|
private:
|
|
STATIC_ASSERT(OffsetOfElementAt(EMBEDDER_DATA_INDEX) ==
|
|
Internals::kNativeContextEmbedderDataOffset);
|
|
|
|
OBJECT_CONSTRUCTORS(NativeContext, Context);
|
|
};
|
|
|
|
typedef Context::Field ContextField;
|
|
|
|
} // namespace internal
|
|
} // namespace v8
|
|
|
|
#include "src/objects/object-macros-undef.h"
|
|
|
|
#endif // V8_CONTEXTS_H_
|