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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 "src/accessors.h" | 7 #include "src/accessors.h" |
8 #include "src/arguments.h" | 8 #include "src/arguments.h" |
9 #include "src/compiler.h" | 9 #include "src/compiler.h" |
10 #include "src/deoptimizer.h" | 10 #include "src/deoptimizer.h" |
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31 | 31 |
32 CONVERT_ARG_HANDLE_CHECKED(JSFunction, f, 0); | 32 CONVERT_ARG_HANDLE_CHECKED(JSFunction, f, 0); |
33 CONVERT_ARG_HANDLE_CHECKED(String, name, 1); | 33 CONVERT_ARG_HANDLE_CHECKED(String, name, 1); |
34 | 34 |
35 name = String::Flatten(name); | 35 name = String::Flatten(name); |
36 f->shared()->set_name(*name); | 36 f->shared()->set_name(*name); |
37 return isolate->heap()->undefined_value(); | 37 return isolate->heap()->undefined_value(); |
38 } | 38 } |
39 | 39 |
40 | 40 |
41 RUNTIME_FUNCTION(Runtime_CompleteFunctionConstruction) { | |
42 SealHandleScope shs(isolate); | |
43 DCHECK(args.length() == 3); | |
44 CONVERT_ARG_HANDLE_CHECKED(JSFunction, func, 0); | |
45 CONVERT_ARG_HANDLE_CHECKED(JSFunction, constructor, 1); | |
46 CONVERT_ARG_HANDLE_CHECKED(Object, unchecked_new_target, 2); | |
47 func->shared()->set_name_should_print_as_anonymous(true); | |
48 | |
49 if (unchecked_new_target->IsUndefined()) return *func; | |
50 | |
51 Handle<JSReceiver> new_target = | |
52 Handle<JSReceiver>::cast(unchecked_new_target); | |
53 // If new.target is equal to |constructor| then the function |func| created | |
54 // is already correctly setup and nothing else should be done here. | |
55 // But if new.target is not equal to |constructor| then we are have a | |
56 // Function builtin subclassing case and therefore the function |func| | |
57 // has wrong initial map. To fix that we create a new function object with | |
58 // correct initial map. | |
59 if (*constructor == *new_target) return *func; | |
60 | |
61 // Create a new JSFunction object with correct initial map. | |
62 HandleScope handle_scope(isolate); | |
63 | |
64 DCHECK(constructor->has_initial_map()); | |
65 Handle<Map> initial_map; | |
66 ASSIGN_RETURN_FAILURE_ON_EXCEPTION( | |
67 isolate, initial_map, | |
68 JSFunction::GetDerivedMap(isolate, constructor, new_target)); | |
69 | |
70 Handle<SharedFunctionInfo> shared_info(func->shared(), isolate); | |
71 Handle<Map> map = Map::AsLanguageMode( | |
72 initial_map, shared_info->language_mode(), shared_info->kind()); | |
73 | |
74 Handle<Context> context(func->context(), isolate); | |
75 Handle<JSFunction> result = | |
76 isolate->factory()->NewFunctionFromSharedFunctionInfo( | |
77 map, shared_info, context, NOT_TENURED); | |
78 DCHECK_EQ(func->IsConstructor(), result->IsConstructor()); | |
79 return *result; | |
80 } | |
81 | |
82 | |
83 RUNTIME_FUNCTION(Runtime_FunctionRemovePrototype) { | 41 RUNTIME_FUNCTION(Runtime_FunctionRemovePrototype) { |
84 SealHandleScope shs(isolate); | 42 SealHandleScope shs(isolate); |
85 DCHECK(args.length() == 1); | 43 DCHECK(args.length() == 1); |
86 | 44 |
87 CONVERT_ARG_CHECKED(JSFunction, f, 0); | 45 CONVERT_ARG_CHECKED(JSFunction, f, 0); |
88 RUNTIME_ASSERT(f->RemovePrototype()); | 46 RUNTIME_ASSERT(f->RemovePrototype()); |
89 f->shared()->set_construct_stub( | 47 f->shared()->set_construct_stub( |
90 *isolate->builtins()->ConstructedNonConstructable()); | 48 *isolate->builtins()->ConstructedNonConstructable()); |
91 | 49 |
92 return isolate->heap()->undefined_value(); | 50 return isolate->heap()->undefined_value(); |
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585 | 543 |
586 RUNTIME_FUNCTION(Runtime_FunctionToString) { | 544 RUNTIME_FUNCTION(Runtime_FunctionToString) { |
587 HandleScope scope(isolate); | 545 HandleScope scope(isolate); |
588 DCHECK_EQ(1, args.length()); | 546 DCHECK_EQ(1, args.length()); |
589 CONVERT_ARG_HANDLE_CHECKED(JSFunction, function, 0); | 547 CONVERT_ARG_HANDLE_CHECKED(JSFunction, function, 0); |
590 return *JSFunction::ToString(function); | 548 return *JSFunction::ToString(function); |
591 } | 549 } |
592 | 550 |
593 } // namespace internal | 551 } // namespace internal |
594 } // namespace v8 | 552 } // namespace v8 |
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