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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/arguments.h" | 7 #include "src/arguments.h" |
8 #include "src/elements.h" | 8 #include "src/elements.h" |
9 #include "src/factory.h" | 9 #include "src/factory.h" |
10 #include "src/isolate-inl.h" | 10 #include "src/isolate-inl.h" |
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66 // 8. Return Call(trap, handler, «target, thisArgument, argArray»). | 66 // 8. Return Call(trap, handler, «target, thisArgument, argArray»). |
67 Handle<Object> trap_result; | 67 Handle<Object> trap_result; |
68 Handle<Object> trap_args[] = {target, receiver, arg_array}; | 68 Handle<Object> trap_args[] = {target, receiver, arg_array}; |
69 ASSIGN_RETURN_FAILURE_ON_EXCEPTION( | 69 ASSIGN_RETURN_FAILURE_ON_EXCEPTION( |
70 isolate, trap_result, | 70 isolate, trap_result, |
71 Execution::Call(isolate, trap, handler, arraysize(trap_args), trap_args)); | 71 Execution::Call(isolate, trap, handler, arraysize(trap_args), trap_args)); |
72 return *trap_result; | 72 return *trap_result; |
73 } | 73 } |
74 | 74 |
75 | 75 |
| 76 // 9.5.14 [[Construct]] (argumentsList, newTarget) |
| 77 RUNTIME_FUNCTION(Runtime_JSProxyConstruct) { |
| 78 HandleScope scope(isolate); |
| 79 DCHECK_LE(3, args.length()); |
| 80 CONVERT_ARG_HANDLE_CHECKED(JSProxy, proxy, args.length() - 2); |
| 81 CONVERT_ARG_HANDLE_CHECKED(Object, new_target, args.length() - 1); |
| 82 Handle<String> trap_name = isolate->factory()->construct_string(); |
| 83 |
| 84 // 1. Let handler be the value of the [[ProxyHandler]] internal slot of O. |
| 85 Handle<Object> handler(proxy->handler(), isolate); |
| 86 // 2. If handler is null, throw a TypeError exception. |
| 87 if (proxy->IsRevoked()) { |
| 88 THROW_NEW_ERROR_RETURN_FAILURE( |
| 89 isolate, NewTypeError(MessageTemplate::kProxyRevoked, trap_name)); |
| 90 } |
| 91 // 3. Assert: Type(handler) is Object. |
| 92 DCHECK(handler->IsJSReceiver()); |
| 93 // 4. Let target be the value of the [[ProxyTarget]] internal slot of O. |
| 94 Handle<JSReceiver> target(JSReceiver::cast(proxy->target()), isolate); |
| 95 // 5. Let trap be ? GetMethod(handler, "construct"). |
| 96 Handle<Object> trap; |
| 97 ASSIGN_RETURN_FAILURE_ON_EXCEPTION( |
| 98 isolate, trap, |
| 99 Object::GetMethod(Handle<JSReceiver>::cast(handler), trap_name)); |
| 100 // 6. If trap is undefined, then |
| 101 int const arguments_length = args.length() - 3; |
| 102 if (trap->IsUndefined()) { |
| 103 // 6.a. Assert: target has a [[Construct]] internal method. |
| 104 DCHECK(target->IsConstructor()); |
| 105 // 6.b. Return Construct(target, argumentsList, newTarget). |
| 106 ScopedVector<Handle<Object>> argv(arguments_length); |
| 107 for (int i = 0; i < arguments_length; ++i) { |
| 108 argv[i] = args.at<Object>(i + 1); |
| 109 } |
| 110 Handle<Object> result; |
| 111 ASSIGN_RETURN_FAILURE_ON_EXCEPTION( |
| 112 isolate, result, Execution::New(isolate, target, new_target, |
| 113 arguments_length, argv.start())); |
| 114 return *result; |
| 115 } |
| 116 // 7. Let argArray be CreateArrayFromList(argumentsList). |
| 117 Handle<JSArray> arg_array = isolate->factory()->NewJSArray( |
| 118 FAST_ELEMENTS, arguments_length, arguments_length); |
| 119 ElementsAccessor* accessor = arg_array->GetElementsAccessor(); |
| 120 { |
| 121 DisallowHeapAllocation no_gc; |
| 122 FixedArrayBase* elements = arg_array->elements(); |
| 123 for (int i = 0; i < arguments_length; i++) { |
| 124 accessor->Set(elements, i, args[i + 1]); |
| 125 } |
| 126 } |
| 127 // 8. Let newObj be ? Call(trap, handler, «target, argArray, newTarget »). |
| 128 Handle<Object> new_object; |
| 129 Handle<Object> trap_args[] = {target, arg_array, new_target}; |
| 130 ASSIGN_RETURN_FAILURE_ON_EXCEPTION( |
| 131 isolate, new_object, |
| 132 Execution::Call(isolate, trap, handler, arraysize(trap_args), trap_args)); |
| 133 // 9. If Type(newObj) is not Object, throw a TypeError exception. |
| 134 if (!new_object->IsJSReceiver()) { |
| 135 THROW_NEW_ERROR_RETURN_FAILURE( |
| 136 isolate, |
| 137 NewTypeError(MessageTemplate::kProxyTrapConstructMustReturnObject, |
| 138 new_object)); |
| 139 } |
| 140 // 10. Return newObj. |
| 141 return *new_object; |
| 142 } |
| 143 |
| 144 |
76 RUNTIME_FUNCTION(Runtime_IsJSProxy) { | 145 RUNTIME_FUNCTION(Runtime_IsJSProxy) { |
77 SealHandleScope shs(isolate); | 146 SealHandleScope shs(isolate); |
78 DCHECK(args.length() == 1); | 147 DCHECK(args.length() == 1); |
79 CONVERT_ARG_CHECKED(Object, obj, 0); | 148 CONVERT_ARG_CHECKED(Object, obj, 0); |
80 return isolate->heap()->ToBoolean(obj->IsJSProxy()); | 149 return isolate->heap()->ToBoolean(obj->IsJSProxy()); |
81 } | 150 } |
82 | 151 |
83 | 152 |
84 RUNTIME_FUNCTION(Runtime_GetHandler) { | 153 RUNTIME_FUNCTION(Runtime_GetHandler) { |
85 SealHandleScope shs(isolate); | 154 SealHandleScope shs(isolate); |
86 DCHECK(args.length() == 1); | 155 DCHECK(args.length() == 1); |
87 CONVERT_ARG_CHECKED(JSProxy, proxy, 0); | 156 CONVERT_ARG_CHECKED(JSProxy, proxy, 0); |
88 return proxy->handler(); | 157 return proxy->handler(); |
89 } | 158 } |
90 | 159 |
91 | 160 |
92 RUNTIME_FUNCTION(Runtime_RevokeProxy) { | 161 RUNTIME_FUNCTION(Runtime_RevokeProxy) { |
93 HandleScope scope(isolate); | 162 HandleScope scope(isolate); |
94 DCHECK(args.length() == 1); | 163 DCHECK(args.length() == 1); |
95 CONVERT_ARG_HANDLE_CHECKED(JSProxy, proxy, 0); | 164 CONVERT_ARG_HANDLE_CHECKED(JSProxy, proxy, 0); |
96 JSProxy::Revoke(proxy); | 165 JSProxy::Revoke(proxy); |
97 return isolate->heap()->undefined_value(); | 166 return isolate->heap()->undefined_value(); |
98 } | 167 } |
99 | 168 |
100 } // namespace internal | 169 } // namespace internal |
101 } // namespace v8 | 170 } // namespace v8 |
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