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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 DCHECK(!super_class->IsJSFunction() || | 97 DCHECK(!super_class->IsJSFunction() || |
98 !Handle<JSFunction>::cast(super_class)->shared()->is_resumable()); | 98 !Handle<JSFunction>::cast(super_class)->shared()->is_resumable()); |
99 ASSIGN_RETURN_ON_EXCEPTION( | 99 ASSIGN_RETURN_ON_EXCEPTION( |
100 isolate, prototype_parent, | 100 isolate, prototype_parent, |
101 Runtime::GetObjectProperty(isolate, super_class, | 101 Runtime::GetObjectProperty(isolate, super_class, |
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116 } | 116 } |
117 } | 117 } |
118 | 118 |
119 Handle<Map> map = | 119 Handle<Map> map = |
120 isolate->factory()->NewMap(JS_OBJECT_TYPE, JSObject::kHeaderSize); | 120 isolate->factory()->NewMap(JS_OBJECT_TYPE, JSObject::kHeaderSize); |
121 map->set_is_prototype_map(true); | 121 map->set_is_prototype_map(true); |
122 Map::SetPrototype(map, prototype_parent); | 122 Map::SetPrototype(map, prototype_parent); |
123 map->SetConstructor(*constructor); | 123 map->SetConstructor(*constructor); |
124 Handle<JSObject> prototype = isolate->factory()->NewJSObjectFromMap(map); | 124 Handle<JSObject> prototype = isolate->factory()->NewJSObjectFromMap(map); |
125 | 125 |
126 if (!super_class->IsTheHole()) { | 126 if (!super_class->IsTheHole(isolate)) { |
127 // Derived classes, just like builtins, don't create implicit receivers in | 127 // Derived classes, just like builtins, don't create implicit receivers in |
128 // [[construct]]. Instead they just set up new.target and call into the | 128 // [[construct]]. Instead they just set up new.target and call into the |
129 // constructor. Hence we can reuse the builtins construct stub for derived | 129 // constructor. Hence we can reuse the builtins construct stub for derived |
130 // classes. | 130 // classes. |
131 Handle<Code> stub(isolate->builtins()->JSBuiltinsConstructStubForDerived()); | 131 Handle<Code> stub(isolate->builtins()->JSBuiltinsConstructStubForDerived()); |
132 constructor->shared()->set_construct_stub(*stub); | 132 constructor->shared()->set_construct_stub(*stub); |
133 } | 133 } |
134 | 134 |
135 JSFunction::SetPrototype(constructor, prototype); | 135 JSFunction::SetPrototype(constructor, prototype); |
136 PropertyAttributes attribs = | 136 PropertyAttributes attribs = |
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389 | 389 |
390 RUNTIME_FUNCTION(Runtime_GetSuperConstructor) { | 390 RUNTIME_FUNCTION(Runtime_GetSuperConstructor) { |
391 SealHandleScope shs(isolate); | 391 SealHandleScope shs(isolate); |
392 DCHECK_EQ(1, args.length()); | 392 DCHECK_EQ(1, args.length()); |
393 CONVERT_ARG_CHECKED(JSFunction, active_function, 0); | 393 CONVERT_ARG_CHECKED(JSFunction, active_function, 0); |
394 return active_function->map()->prototype(); | 394 return active_function->map()->prototype(); |
395 } | 395 } |
396 | 396 |
397 } // namespace internal | 397 } // namespace internal |
398 } // namespace v8 | 398 } // namespace v8 |
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