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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/v8.h" | 5 #include "src/v8.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/frames-inl.h" | 9 #include "src/frames-inl.h" |
10 #include "src/runtime/runtime-utils.h" | 10 #include "src/runtime/runtime-utils.h" |
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291 } | 291 } |
292 | 292 |
293 PropertyAttributes attr = | 293 PropertyAttributes attr = |
294 static_cast<PropertyAttributes>(DONT_DELETE | READ_ONLY); | 294 static_cast<PropertyAttributes>(DONT_DELETE | READ_ONLY); |
295 | 295 |
296 // Strict mode handling not needed (legacy const is disallowed in strict | 296 // Strict mode handling not needed (legacy const is disallowed in strict |
297 // mode). | 297 // mode). |
298 | 298 |
299 // The declared const was configurable, and may have been deleted in the | 299 // The declared const was configurable, and may have been deleted in the |
300 // meanwhile. If so, re-introduce the variable in the context extension. | 300 // meanwhile. If so, re-introduce the variable in the context extension. |
301 DCHECK(context_arg->has_extension()); | |
302 if (attributes == ABSENT) { | 301 if (attributes == ABSENT) { |
303 holder = handle(context_arg->extension(), isolate); | 302 Handle<Context> declaration_context(context_arg->declaration_context()); |
| 303 DCHECK(declaration_context->has_extension()); |
| 304 holder = handle(declaration_context->extension(), isolate); |
| 305 CHECK(holder->IsJSObject()); |
304 } else { | 306 } else { |
305 // For JSContextExtensionObjects, the initializer can be run multiple times | 307 // For JSContextExtensionObjects, the initializer can be run multiple times |
306 // if in a for loop: for (var i = 0; i < 2; i++) { const x = i; }. Only the | 308 // if in a for loop: for (var i = 0; i < 2; i++) { const x = i; }. Only the |
307 // first assignment should go through. For JSGlobalObjects, additionally any | 309 // first assignment should go through. For JSGlobalObjects, additionally any |
308 // code can run in between that modifies the declared property. | 310 // code can run in between that modifies the declared property. |
309 DCHECK(holder->IsJSGlobalObject() || holder->IsJSContextExtensionObject()); | 311 DCHECK(holder->IsJSGlobalObject() || holder->IsJSContextExtensionObject()); |
310 | 312 |
311 LookupIterator it(holder, name, LookupIterator::HIDDEN_SKIP_INTERCEPTOR); | 313 LookupIterator it(holder, name, LookupIterator::HIDDEN_SKIP_INTERCEPTOR); |
312 Maybe<PropertyAttributes> maybe = JSReceiver::GetPropertyAttributes(&it); | 314 Maybe<PropertyAttributes> maybe = JSReceiver::GetPropertyAttributes(&it); |
313 if (!maybe.has_value) return isolate->heap()->exception(); | 315 if (!maybe.has_value) return isolate->heap()->exception(); |
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1019 return Smi::FromInt(frame->GetArgumentsLength()); | 1021 return Smi::FromInt(frame->GetArgumentsLength()); |
1020 } | 1022 } |
1021 | 1023 |
1022 | 1024 |
1023 RUNTIME_FUNCTION(RuntimeReference_Arguments) { | 1025 RUNTIME_FUNCTION(RuntimeReference_Arguments) { |
1024 SealHandleScope shs(isolate); | 1026 SealHandleScope shs(isolate); |
1025 return __RT_impl_Runtime_GetArgumentsProperty(args, isolate); | 1027 return __RT_impl_Runtime_GetArgumentsProperty(args, isolate); |
1026 } | 1028 } |
1027 } | 1029 } |
1028 } // namespace v8::internal | 1030 } // namespace v8::internal |
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