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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 #include "src/runtime/runtime-utils.h" | 5 #include "src/runtime/runtime-utils.h" |
| 6 | 6 |
| 7 #include <stdlib.h> | 7 #include <stdlib.h> |
| 8 #include <limits> | 8 #include <limits> |
| 9 | 9 |
| 10 #include "src/arguments.h" | 10 #include "src/arguments.h" |
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| 81 return isolate->heap()->home_object_symbol(); | 81 return isolate->heap()->home_object_symbol(); |
| 82 } | 82 } |
| 83 | 83 |
| 84 static MaybeHandle<Object> DefineClass(Isolate* isolate, | 84 static MaybeHandle<Object> DefineClass(Isolate* isolate, |
| 85 Handle<Object> super_class, | 85 Handle<Object> super_class, |
| 86 Handle<JSFunction> constructor, | 86 Handle<JSFunction> constructor, |
| 87 int start_position, int end_position) { | 87 int start_position, int end_position) { |
| 88 Handle<Object> prototype_parent; | 88 Handle<Object> prototype_parent; |
| 89 Handle<Object> constructor_parent; | 89 Handle<Object> constructor_parent; |
| 90 | 90 |
| 91 if (super_class->IsTheHole()) { | 91 if (super_class->IsTheHole(isolate)) { |
| 92 prototype_parent = isolate->initial_object_prototype(); | 92 prototype_parent = isolate->initial_object_prototype(); |
| 93 } else { | 93 } else { |
| 94 if (super_class->IsNull()) { | 94 if (super_class->IsNull()) { |
| 95 prototype_parent = isolate->factory()->null_value(); | 95 prototype_parent = isolate->factory()->null_value(); |
| 96 } else if (super_class->IsConstructor()) { | 96 } else if (super_class->IsConstructor()) { |
| 97 if (super_class->IsJSFunction() && | 97 if (super_class->IsJSFunction() && |
| 98 Handle<JSFunction>::cast(super_class)->shared()->is_generator()) { | 98 Handle<JSFunction>::cast(super_class)->shared()->is_generator()) { |
| 99 THROW_NEW_ERROR( | 99 THROW_NEW_ERROR( |
| 100 isolate, | 100 isolate, |
| 101 NewTypeError(MessageTemplate::kExtendsValueGenerator, super_class), | 101 NewTypeError(MessageTemplate::kExtendsValueGenerator, super_class), |
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| 121 } | 121 } |
| 122 } | 122 } |
| 123 | 123 |
| 124 Handle<Map> map = | 124 Handle<Map> map = |
| 125 isolate->factory()->NewMap(JS_OBJECT_TYPE, JSObject::kHeaderSize); | 125 isolate->factory()->NewMap(JS_OBJECT_TYPE, JSObject::kHeaderSize); |
| 126 map->set_is_prototype_map(true); | 126 map->set_is_prototype_map(true); |
| 127 Map::SetPrototype(map, prototype_parent); | 127 Map::SetPrototype(map, prototype_parent); |
| 128 map->SetConstructor(*constructor); | 128 map->SetConstructor(*constructor); |
| 129 Handle<JSObject> prototype = isolate->factory()->NewJSObjectFromMap(map); | 129 Handle<JSObject> prototype = isolate->factory()->NewJSObjectFromMap(map); |
| 130 | 130 |
| 131 if (!super_class->IsTheHole()) { | 131 if (!super_class->IsTheHole(isolate)) { |
| 132 // Derived classes, just like builtins, don't create implicit receivers in | 132 // Derived classes, just like builtins, don't create implicit receivers in |
| 133 // [[construct]]. Instead they just set up new.target and call into the | 133 // [[construct]]. Instead they just set up new.target and call into the |
| 134 // constructor. Hence we can reuse the builtins construct stub for derived | 134 // constructor. Hence we can reuse the builtins construct stub for derived |
| 135 // classes. | 135 // classes. |
| 136 Handle<Code> stub(isolate->builtins()->JSBuiltinsConstructStubForDerived()); | 136 Handle<Code> stub(isolate->builtins()->JSBuiltinsConstructStubForDerived()); |
| 137 constructor->shared()->set_construct_stub(*stub); | 137 constructor->shared()->set_construct_stub(*stub); |
| 138 } | 138 } |
| 139 | 139 |
| 140 JSFunction::SetPrototype(constructor, prototype); | 140 JSFunction::SetPrototype(constructor, prototype); |
| 141 PropertyAttributes attribs = | 141 PropertyAttributes attribs = |
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| 394 | 394 |
| 395 RUNTIME_FUNCTION(Runtime_GetSuperConstructor) { | 395 RUNTIME_FUNCTION(Runtime_GetSuperConstructor) { |
| 396 SealHandleScope shs(isolate); | 396 SealHandleScope shs(isolate); |
| 397 DCHECK_EQ(1, args.length()); | 397 DCHECK_EQ(1, args.length()); |
| 398 CONVERT_ARG_CHECKED(JSFunction, active_function, 0); | 398 CONVERT_ARG_CHECKED(JSFunction, active_function, 0); |
| 399 return active_function->map()->prototype(); | 399 return active_function->map()->prototype(); |
| 400 } | 400 } |
| 401 | 401 |
| 402 } // namespace internal | 402 } // namespace internal |
| 403 } // namespace v8 | 403 } // namespace v8 |
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