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1 // Copyright 2015 the V8 project authors. All rights reserved. | 1 // Copyright 2015 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 #include "src/runtime/runtime-utils.h" | 5 #include "src/runtime/runtime-utils.h" |
6 | 6 |
7 #include "src/arguments.h" | 7 #include "src/arguments.h" |
| 8 #include "src/factory.h" |
| 9 #include "src/isolate-inl.h" |
8 #include "src/objects-inl.h" | 10 #include "src/objects-inl.h" |
9 | 11 |
10 namespace v8 { | 12 namespace v8 { |
11 namespace internal { | 13 namespace internal { |
12 | 14 |
| 15 RUNTIME_FUNCTION_RETURN_TRIPLE(Runtime_ForInPrepare) { |
| 16 HandleScope scope(isolate); |
| 17 DCHECK_EQ(1, args.length()); |
| 18 |
| 19 if (!args[0]->IsJSReceiver()) { |
| 20 return MakeTriple(isolate->ThrowIllegalOperation(), nullptr, nullptr); |
| 21 } |
| 22 Handle<JSReceiver> receiver = args.at<JSReceiver>(0); |
| 23 |
| 24 Object* property_names = Runtime_GetPropertyNamesFast( |
| 25 1, Handle<Object>::cast(receiver).location(), isolate); |
| 26 if (isolate->has_pending_exception()) { |
| 27 return MakeTriple(property_names, nullptr, nullptr); |
| 28 } |
| 29 |
| 30 Handle<Object> cache_type(property_names, isolate); |
| 31 Handle<FixedArray> cache_array; |
| 32 int cache_length; |
| 33 |
| 34 Handle<Map> receiver_map = handle(receiver->map(), isolate); |
| 35 if (cache_type->IsMap()) { |
| 36 Handle<Map> cache_type_map = |
| 37 handle(Handle<Map>::cast(cache_type)->map(), isolate); |
| 38 DCHECK(cache_type_map.is_identical_to(isolate->factory()->meta_map())); |
| 39 int enum_length = cache_type_map->EnumLength(); |
| 40 DescriptorArray* descriptors = receiver_map->instance_descriptors(); |
| 41 if (enum_length > 0 && descriptors->HasEnumCache()) { |
| 42 cache_array = handle(descriptors->GetEnumCache(), isolate); |
| 43 cache_length = cache_array->length(); |
| 44 } else { |
| 45 cache_array = isolate->factory()->empty_fixed_array(); |
| 46 cache_length = 0; |
| 47 } |
| 48 } else { |
| 49 cache_array = Handle<FixedArray>::cast(cache_type); |
| 50 cache_length = cache_array->length(); |
| 51 // Cache type of SMI one entails slow check. |
| 52 cache_type = Handle<Object>(Smi::FromInt(1), isolate); |
| 53 } |
| 54 |
| 55 return MakeTriple(*cache_type, *cache_array, Smi::FromInt(cache_length)); |
| 56 } |
| 57 |
| 58 |
13 RUNTIME_FUNCTION(Runtime_ForInDone) { | 59 RUNTIME_FUNCTION(Runtime_ForInDone) { |
14 SealHandleScope scope(isolate); | 60 SealHandleScope scope(isolate); |
15 DCHECK_EQ(2, args.length()); | 61 DCHECK_EQ(2, args.length()); |
16 CONVERT_SMI_ARG_CHECKED(index, 0); | 62 CONVERT_SMI_ARG_CHECKED(index, 0); |
17 CONVERT_SMI_ARG_CHECKED(length, 1); | 63 CONVERT_SMI_ARG_CHECKED(length, 1); |
18 DCHECK_LE(0, index); | 64 DCHECK_LE(0, index); |
19 DCHECK_LE(index, length); | 65 DCHECK_LE(index, length); |
20 return isolate->heap()->ToBoolean(index == length); | 66 return isolate->heap()->ToBoolean(index == length); |
21 } | 67 } |
22 | 68 |
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67 SealHandleScope scope(isolate); | 113 SealHandleScope scope(isolate); |
68 DCHECK_EQ(1, args.length()); | 114 DCHECK_EQ(1, args.length()); |
69 CONVERT_SMI_ARG_CHECKED(index, 0); | 115 CONVERT_SMI_ARG_CHECKED(index, 0); |
70 DCHECK_LE(0, index); | 116 DCHECK_LE(0, index); |
71 DCHECK_LT(index, Smi::kMaxValue); | 117 DCHECK_LT(index, Smi::kMaxValue); |
72 return Smi::FromInt(index + 1); | 118 return Smi::FromInt(index + 1); |
73 } | 119 } |
74 | 120 |
75 } // namespace internal | 121 } // namespace internal |
76 } // namespace v8 | 122 } // namespace v8 |
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