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1 // Copyright 2014 the V8 project authors. All rights reserved. | 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 | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #ifndef V8_LOOKUP_INL_H_ | 5 #ifndef V8_LOOKUP_INL_H_ |
6 #define V8_LOOKUP_INL_H_ | 6 #define V8_LOOKUP_INL_H_ |
7 | 7 |
8 #include "src/lookup.h" | 8 #include "src/lookup.h" |
9 | 9 |
10 #include "src/elements.h" | 10 #include "src/elements.h" |
11 | 11 |
12 namespace v8 { | 12 namespace v8 { |
13 namespace internal { | 13 namespace internal { |
14 | 14 |
15 | 15 |
16 JSReceiver* LookupIterator::NextHolder(Map* map) { | 16 JSReceiver* LookupIterator::NextHolder(Map* map) { |
17 DisallowHeapAllocation no_gc; | 17 DisallowHeapAllocation no_gc; |
18 if (map->prototype()->IsNull()) return NULL; | 18 if (!map->prototype()->IsJSReceiver()) return NULL; |
19 | 19 |
20 JSReceiver* next = JSReceiver::cast(map->prototype()); | 20 JSReceiver* next = JSReceiver::cast(map->prototype()); |
21 DCHECK(!next->map()->IsGlobalObjectMap() || | 21 DCHECK(!next->map()->IsGlobalObjectMap() || |
22 next->map()->is_hidden_prototype()); | 22 next->map()->is_hidden_prototype()); |
23 | 23 |
24 if (!check_prototype_chain() && | 24 if (!check_prototype_chain() && |
25 !(check_hidden() && next->map()->is_hidden_prototype()) && | 25 !(check_hidden() && next->map()->is_hidden_prototype()) && |
26 // Always lookup behind the JSGlobalProxy into the JSGlobalObject, even | 26 // Always lookup behind the JSGlobalProxy into the JSGlobalObject, even |
27 // when not checking other hidden prototypes. | 27 // when not checking other hidden prototypes. |
28 !map->IsJSGlobalProxyMap()) { | 28 !map->IsJSGlobalProxyMap()) { |
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132 default: | 132 default: |
133 return NOT_FOUND; | 133 return NOT_FOUND; |
134 } | 134 } |
135 UNREACHABLE(); | 135 UNREACHABLE(); |
136 return state_; | 136 return state_; |
137 } | 137 } |
138 } | 138 } |
139 } // namespace v8::internal | 139 } // namespace v8::internal |
140 | 140 |
141 #endif // V8_LOOKUP_INL_H_ | 141 #endif // V8_LOOKUP_INL_H_ |
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