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1 // Copyright 2012 the V8 project authors. All rights reserved. | 1 // Copyright 2012 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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2056 bool is_var = value->IsUndefined(); | 2056 bool is_var = value->IsUndefined(); |
2057 bool is_const = value->IsTheHole(); | 2057 bool is_const = value->IsTheHole(); |
2058 bool is_function = value->IsSharedFunctionInfo(); | 2058 bool is_function = value->IsSharedFunctionInfo(); |
2059 ASSERT(is_var + is_const + is_function == 1); | 2059 ASSERT(is_var + is_const + is_function == 1); |
2060 | 2060 |
2061 if (is_var || is_const) { | 2061 if (is_var || is_const) { |
2062 // Lookup the property in the global object, and don't set the | 2062 // Lookup the property in the global object, and don't set the |
2063 // value of the variable if the property is already there. | 2063 // value of the variable if the property is already there. |
2064 // Do the lookup locally only, see ES5 erratum. | 2064 // Do the lookup locally only, see ES5 erratum. |
2065 LookupResult lookup(isolate); | 2065 LookupResult lookup(isolate); |
2066 if (FLAG_es52_globals) { | 2066 global->LocalLookup(*name, &lookup, true); |
2067 global->LocalLookup(*name, &lookup, true); | |
2068 } else { | |
2069 global->Lookup(*name, &lookup); | |
2070 } | |
2071 if (lookup.IsFound()) { | 2067 if (lookup.IsFound()) { |
2072 // We found an existing property. Unless it was an interceptor | 2068 // We found an existing property. Unless it was an interceptor |
2073 // that claims the property is absent, skip this declaration. | 2069 // that claims the property is absent, skip this declaration. |
2074 if (!lookup.IsInterceptor()) continue; | 2070 if (!lookup.IsInterceptor()) continue; |
2075 PropertyAttributes attributes = global->GetPropertyAttribute(*name); | 2071 PropertyAttributes attributes = global->GetPropertyAttribute(*name); |
2076 if (attributes != ABSENT) continue; | 2072 if (attributes != ABSENT) continue; |
2077 // Fall-through and introduce the absent property by using | 2073 // Fall-through and introduce the absent property by using |
2078 // SetProperty. | 2074 // SetProperty. |
2079 } | 2075 } |
2080 } else if (is_function) { | 2076 } else if (is_function) { |
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14965 // Handle last resort GC and make sure to allow future allocations | 14961 // Handle last resort GC and make sure to allow future allocations |
14966 // to grow the heap without causing GCs (if possible). | 14962 // to grow the heap without causing GCs (if possible). |
14967 isolate->counters()->gc_last_resort_from_js()->Increment(); | 14963 isolate->counters()->gc_last_resort_from_js()->Increment(); |
14968 isolate->heap()->CollectAllGarbage(Heap::kNoGCFlags, | 14964 isolate->heap()->CollectAllGarbage(Heap::kNoGCFlags, |
14969 "Runtime::PerformGC"); | 14965 "Runtime::PerformGC"); |
14970 } | 14966 } |
14971 } | 14967 } |
14972 | 14968 |
14973 | 14969 |
14974 } } // namespace v8::internal | 14970 } } // namespace v8::internal |
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