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| 1 // Copyright 2006-2009 the V8 project authors. All rights reserved. | 1 // Copyright 2006-2009 the V8 project authors. All rights reserved. |
| 2 // Redistribution and use in source and binary forms, with or without | 2 // Redistribution and use in source and binary forms, with or without |
| 3 // modification, are permitted provided that the following conditions are | 3 // modification, are permitted provided that the following conditions are |
| 4 // met: | 4 // met: |
| 5 // | 5 // |
| 6 // * Redistributions of source code must retain the above copyright | 6 // * Redistributions of source code must retain the above copyright |
| 7 // notice, this list of conditions and the following disclaimer. | 7 // notice, this list of conditions and the following disclaimer. |
| 8 // * Redistributions in binary form must reproduce the above | 8 // * Redistributions in binary form must reproduce the above |
| 9 // copyright notice, this list of conditions and the following | 9 // copyright notice, this list of conditions and the following |
| 10 // disclaimer in the documentation and/or other materials provided | 10 // disclaimer in the documentation and/or other materials provided |
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| 3764 // for objects that require access checks. | 3764 // for objects that require access checks. |
| 3765 if (args[0]->IsJSObject() && | 3765 if (args[0]->IsJSObject() && |
| 3766 !args[0]->IsJSGlobalProxy() && | 3766 !args[0]->IsJSGlobalProxy() && |
| 3767 !args[0]->IsAccessCheckNeeded() && | 3767 !args[0]->IsAccessCheckNeeded() && |
| 3768 args[1]->IsString()) { | 3768 args[1]->IsString()) { |
| 3769 JSObject* receiver = JSObject::cast(args[0]); | 3769 JSObject* receiver = JSObject::cast(args[0]); |
| 3770 String* key = String::cast(args[1]); | 3770 String* key = String::cast(args[1]); |
| 3771 if (receiver->HasFastProperties()) { | 3771 if (receiver->HasFastProperties()) { |
| 3772 // Attempt to use lookup cache. | 3772 // Attempt to use lookup cache. |
| 3773 Map* receiver_map = receiver->map(); | 3773 Map* receiver_map = receiver->map(); |
| 3774 int offset = KeyedLookupCache::Lookup(receiver_map, key); | 3774 KeyedLookupCache* keyed_lookup_cache = Isolate::Current()-> |
| 3775 keyed_lookup_cache(); |
| 3776 int offset = keyed_lookup_cache->Lookup(receiver_map, key); |
| 3775 if (offset != -1) { | 3777 if (offset != -1) { |
| 3776 Object* value = receiver->FastPropertyAt(offset); | 3778 Object* value = receiver->FastPropertyAt(offset); |
| 3777 return value->IsTheHole() ? HEAP->undefined_value() : value; | 3779 return value->IsTheHole() ? HEAP->undefined_value() : value; |
| 3778 } | 3780 } |
| 3779 // Lookup cache miss. Perform lookup and update the cache if appropriate. | 3781 // Lookup cache miss. Perform lookup and update the cache if appropriate. |
| 3780 LookupResult result; | 3782 LookupResult result; |
| 3781 receiver->LocalLookup(key, &result); | 3783 receiver->LocalLookup(key, &result); |
| 3782 if (result.IsProperty() && result.type() == FIELD) { | 3784 if (result.IsProperty() && result.type() == FIELD) { |
| 3783 int offset = result.GetFieldIndex(); | 3785 int offset = result.GetFieldIndex(); |
| 3784 KeyedLookupCache::Update(receiver_map, key, offset); | 3786 keyed_lookup_cache->Update(receiver_map, key, offset); |
| 3785 return receiver->FastPropertyAt(offset); | 3787 return receiver->FastPropertyAt(offset); |
| 3786 } | 3788 } |
| 3787 } else { | 3789 } else { |
| 3788 // Attempt dictionary lookup. | 3790 // Attempt dictionary lookup. |
| 3789 StringDictionary* dictionary = receiver->property_dictionary(); | 3791 StringDictionary* dictionary = receiver->property_dictionary(); |
| 3790 int entry = dictionary->FindEntry(key); | 3792 int entry = dictionary->FindEntry(key); |
| 3791 if ((entry != StringDictionary::kNotFound) && | 3793 if ((entry != StringDictionary::kNotFound) && |
| 3792 (dictionary->DetailsAt(entry).type() == NORMAL)) { | 3794 (dictionary->DetailsAt(entry).type() == NORMAL)) { |
| 3793 Object* value = dictionary->ValueAt(entry); | 3795 Object* value = dictionary->ValueAt(entry); |
| 3794 if (!receiver->IsGlobalObject()) return value; | 3796 if (!receiver->IsGlobalObject()) return value; |
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| 10339 } else { | 10341 } else { |
| 10340 // Handle last resort GC and make sure to allow future allocations | 10342 // Handle last resort GC and make sure to allow future allocations |
| 10341 // to grow the heap without causing GCs (if possible). | 10343 // to grow the heap without causing GCs (if possible). |
| 10342 Counters::gc_last_resort_from_js.Increment(); | 10344 Counters::gc_last_resort_from_js.Increment(); |
| 10343 HEAP->CollectAllGarbage(false); | 10345 HEAP->CollectAllGarbage(false); |
| 10344 } | 10346 } |
| 10345 } | 10347 } |
| 10346 | 10348 |
| 10347 | 10349 |
| 10348 } } // namespace v8::internal | 10350 } } // namespace v8::internal |
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