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1 // Copyright 2011 the V8 project authors. All rights reserved. | 1 // Copyright 2011 the V8 project authors. All rights reserved. |
2 // Redistribution and use in source and binary forms, with or without | 2 // Redistribution and use in source and binary forms, with or without |
3 // modification, are permitted provided that the following conditions are | 3 // modification, are permitted provided that the following conditions are |
4 // met: | 4 // met: |
5 // | 5 // |
6 // * Redistributions of source code must retain the above copyright | 6 // * Redistributions of source code must retain the above copyright |
7 // notice, this list of conditions and the following disclaimer. | 7 // notice, this list of conditions and the following disclaimer. |
8 // * Redistributions in binary form must reproduce the above | 8 // * Redistributions in binary form must reproduce the above |
9 // copyright notice, this list of conditions and the following | 9 // copyright notice, this list of conditions and the following |
10 // disclaimer in the documentation and/or other materials provided | 10 // disclaimer in the documentation and/or other materials provided |
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270 if (object->IsHeapObject() && | 270 if (object->IsHeapObject() && |
271 HeapObject::cast(*object)->map()->has_instance_call_handler()) { | 271 HeapObject::cast(*object)->map()->has_instance_call_handler()) { |
272 return Handle<JSFunction>( | 272 return Handle<JSFunction>( |
273 isolate->global_context()->call_as_constructor_delegate()); | 273 isolate->global_context()->call_as_constructor_delegate()); |
274 } | 274 } |
275 | 275 |
276 return isolate->factory()->undefined_value(); | 276 return isolate->factory()->undefined_value(); |
277 } | 277 } |
278 | 278 |
279 | 279 |
| 280 Handle<Object> Execution::TryGetConstructorDelegate( |
| 281 Handle<Object> object, |
| 282 bool* has_pending_exception) { |
| 283 ASSERT(!object->IsJSFunction()); |
| 284 Isolate* isolate = Isolate::Current(); |
| 285 |
| 286 // If you return a function from here, it will be called when an |
| 287 // attempt is made to call the given object as a constructor. |
| 288 |
| 289 // Objects created through the API can have an instance-call handler |
| 290 // that should be used when calling the object as a function. |
| 291 if (object->IsHeapObject() && |
| 292 HeapObject::cast(*object)->map()->has_instance_call_handler()) { |
| 293 return Handle<JSFunction>( |
| 294 isolate->global_context()->call_as_constructor_delegate()); |
| 295 } |
| 296 |
| 297 // If the Object doesn't have an instance-call handler we should |
| 298 // throw a non-callable exception. |
| 299 i::Handle<i::Object> error_obj = isolate->factory()->NewTypeError( |
| 300 "called_non_callable", i::HandleVector<i::Object>(&object, 1)); |
| 301 isolate->Throw(*error_obj); |
| 302 *has_pending_exception = true; |
| 303 |
| 304 return isolate->factory()->undefined_value(); |
| 305 } |
| 306 |
| 307 |
280 bool StackGuard::IsStackOverflow() { | 308 bool StackGuard::IsStackOverflow() { |
281 ExecutionAccess access(isolate_); | 309 ExecutionAccess access(isolate_); |
282 return (thread_local_.jslimit_ != kInterruptLimit && | 310 return (thread_local_.jslimit_ != kInterruptLimit && |
283 thread_local_.climit_ != kInterruptLimit); | 311 thread_local_.climit_ != kInterruptLimit); |
284 } | 312 } |
285 | 313 |
286 | 314 |
287 void StackGuard::EnableInterrupts() { | 315 void StackGuard::EnableInterrupts() { |
288 ExecutionAccess access(isolate_); | 316 ExecutionAccess access(isolate_); |
289 if (has_pending_interrupts(access)) { | 317 if (has_pending_interrupts(access)) { |
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806 return isolate->TerminateExecution(); | 834 return isolate->TerminateExecution(); |
807 } | 835 } |
808 if (stack_guard->IsInterrupted()) { | 836 if (stack_guard->IsInterrupted()) { |
809 stack_guard->Continue(INTERRUPT); | 837 stack_guard->Continue(INTERRUPT); |
810 return isolate->StackOverflow(); | 838 return isolate->StackOverflow(); |
811 } | 839 } |
812 return isolate->heap()->undefined_value(); | 840 return isolate->heap()->undefined_value(); |
813 } | 841 } |
814 | 842 |
815 } } // namespace v8::internal | 843 } } // namespace v8::internal |
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