Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 1 | // Copyright 2014 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_LOOKUP_INL_H_ |
| 6 | #define V8_LOOKUP_INL_H_ |
| 7 | |
| 8 | #include "src/lookup.h" |
| 9 | |
| 10 | namespace v8 { |
| 11 | namespace internal { |
| 12 | |
| 13 | |
| 14 | JSReceiver* LookupIterator::NextHolder(Map* map) { |
| 15 | DisallowHeapAllocation no_gc; |
| 16 | if (map->prototype()->IsNull()) return NULL; |
| 17 | |
| 18 | JSReceiver* next = JSReceiver::cast(map->prototype()); |
| 19 | DCHECK(!next->map()->IsGlobalObjectMap() || |
| 20 | next->map()->is_hidden_prototype()); |
| 21 | |
| 22 | if (!check_prototype_chain() && |
| 23 | !(check_hidden() && next->map()->is_hidden_prototype()) && |
| 24 | // Always lookup behind the JSGlobalProxy into the JSGlobalObject, even |
| 25 | // when not checking other hidden prototypes. |
| 26 | !map->IsJSGlobalProxyMap()) { |
| 27 | return NULL; |
| 28 | } |
| 29 | |
| 30 | return next; |
| 31 | } |
| 32 | |
| 33 | |
| 34 | LookupIterator::State LookupIterator::LookupInHolder(Map* map, |
| 35 | JSReceiver* holder) { |
| 36 | STATIC_ASSERT(INTERCEPTOR == BEFORE_PROPERTY); |
| 37 | DisallowHeapAllocation no_gc; |
| 38 | switch (state_) { |
| 39 | case NOT_FOUND: |
| 40 | if (map->IsJSProxyMap()) return JSPROXY; |
| 41 | if (map->is_access_check_needed()) return ACCESS_CHECK; |
| 42 | // Fall through. |
| 43 | case ACCESS_CHECK: |
| 44 | if (check_interceptor() && map->has_named_interceptor()) { |
| 45 | return INTERCEPTOR; |
| 46 | } |
| 47 | // Fall through. |
| 48 | case INTERCEPTOR: |
| 49 | if (map->is_dictionary_map()) { |
| 50 | NameDictionary* dict = JSObject::cast(holder)->property_dictionary(); |
| 51 | number_ = dict->FindEntry(name_); |
| 52 | if (number_ == NameDictionary::kNotFound) return NOT_FOUND; |
| 53 | property_details_ = dict->DetailsAt(number_); |
| 54 | if (holder->IsGlobalObject()) { |
| 55 | if (property_details_.IsDeleted()) return NOT_FOUND; |
| 56 | PropertyCell* cell = PropertyCell::cast(dict->ValueAt(number_)); |
| 57 | if (cell->value()->IsTheHole()) return NOT_FOUND; |
| 58 | } |
| 59 | } else { |
| 60 | DescriptorArray* descriptors = map->instance_descriptors(); |
| 61 | number_ = descriptors->SearchWithCache(*name_, map); |
| 62 | if (number_ == DescriptorArray::kNotFound) return NOT_FOUND; |
| 63 | property_details_ = descriptors->GetDetails(number_); |
| 64 | } |
| 65 | has_property_ = true; |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 66 | switch (property_details_.kind()) { |
| 67 | case v8::internal::DATA: |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 68 | return DATA; |
Emily Bernier | d0a1eb7 | 2015-03-24 16:35:39 -0400 | [diff] [blame] | 69 | case v8::internal::ACCESSOR: |
Ben Murdoch | b8a8cc1 | 2014-11-26 15:28:44 +0000 | [diff] [blame] | 70 | return ACCESSOR; |
| 71 | } |
| 72 | case ACCESSOR: |
| 73 | case DATA: |
| 74 | return NOT_FOUND; |
| 75 | case JSPROXY: |
| 76 | case TRANSITION: |
| 77 | UNREACHABLE(); |
| 78 | } |
| 79 | UNREACHABLE(); |
| 80 | return state_; |
| 81 | } |
| 82 | } |
| 83 | } // namespace v8::internal |
| 84 | |
| 85 | #endif // V8_LOOKUP_INL_H_ |