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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/frames-inl.h" | 9 #include "src/frames-inl.h" |
10 #include "src/isolate-inl.h" | 10 #include "src/isolate-inl.h" |
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549 RUNTIME_FUNCTION(Runtime_NewStrictArguments) { | 549 RUNTIME_FUNCTION(Runtime_NewStrictArguments) { |
550 HandleScope scope(isolate); | 550 HandleScope scope(isolate); |
551 DCHECK(args.length() == 3); | 551 DCHECK(args.length() == 3); |
552 CONVERT_ARG_HANDLE_CHECKED(JSFunction, callee, 0) | 552 CONVERT_ARG_HANDLE_CHECKED(JSFunction, callee, 0) |
553 Object** parameters = reinterpret_cast<Object**>(args[1]); | 553 Object** parameters = reinterpret_cast<Object**>(args[1]); |
554 CONVERT_SMI_ARG_CHECKED(argument_count, 2); | 554 CONVERT_SMI_ARG_CHECKED(argument_count, 2); |
555 return *NewStrictArguments(isolate, callee, parameters, argument_count); | 555 return *NewStrictArguments(isolate, callee, parameters, argument_count); |
556 } | 556 } |
557 | 557 |
558 | 558 |
559 static Handle<JSArray> NewRestParam(Isolate* isolate, Object** parameters, | |
560 int num_params, int rest_index, | |
561 LanguageMode language_mode) { | |
562 parameters -= rest_index; | |
563 int num_elements = std::max(0, num_params - rest_index); | |
564 Handle<FixedArray> elements = | |
565 isolate->factory()->NewUninitializedFixedArray(num_elements); | |
566 for (int i = 0; i < num_elements; ++i) { | |
567 elements->set(i, *--parameters); | |
568 } | |
569 return isolate->factory()->NewJSArrayWithElements( | |
570 elements, FAST_ELEMENTS, num_elements, strength(language_mode)); | |
571 } | |
572 | |
573 | |
574 RUNTIME_FUNCTION(Runtime_NewRestParam) { | |
575 HandleScope scope(isolate); | |
576 DCHECK(args.length() == 4); | |
577 Object** parameters = reinterpret_cast<Object**>(args[0]); | |
578 CONVERT_SMI_ARG_CHECKED(num_params, 1); | |
579 CONVERT_SMI_ARG_CHECKED(rest_index, 2); | |
580 CONVERT_SMI_ARG_CHECKED(language_mode, 3); | |
581 | |
582 return *NewRestParam(isolate, parameters, num_params, rest_index, | |
583 static_cast<LanguageMode>(language_mode)); | |
584 } | |
585 | |
586 | |
587 RUNTIME_FUNCTION(Runtime_NewRestParamSlow) { | |
588 HandleScope scope(isolate); | |
589 DCHECK(args.length() == 2); | |
590 CONVERT_SMI_ARG_CHECKED(rest_index, 0); | |
591 CONVERT_SMI_ARG_CHECKED(language_mode, 1); | |
592 | |
593 JavaScriptFrameIterator it(isolate); | |
594 | |
595 // Find the frame that holds the actual arguments passed to the function. | |
596 it.AdvanceToArgumentsFrame(); | |
597 JavaScriptFrame* frame = it.frame(); | |
598 | |
599 int argument_count = frame->GetArgumentsLength(); | |
600 Object** parameters = reinterpret_cast<Object**>(frame->GetParameterSlot(-1)); | |
601 | |
602 return *NewRestParam(isolate, parameters, argument_count, rest_index, | |
603 static_cast<LanguageMode>(language_mode)); | |
604 } | |
605 | |
606 | |
607 RUNTIME_FUNCTION(Runtime_NewClosureFromStubFailure) { | 559 RUNTIME_FUNCTION(Runtime_NewClosureFromStubFailure) { |
608 HandleScope scope(isolate); | 560 HandleScope scope(isolate); |
609 DCHECK(args.length() == 1); | 561 DCHECK(args.length() == 1); |
610 CONVERT_ARG_HANDLE_CHECKED(SharedFunctionInfo, shared, 0); | 562 CONVERT_ARG_HANDLE_CHECKED(SharedFunctionInfo, shared, 0); |
611 Handle<Context> context(isolate->context()); | 563 Handle<Context> context(isolate->context()); |
612 PretenureFlag pretenure_flag = NOT_TENURED; | 564 PretenureFlag pretenure_flag = NOT_TENURED; |
613 return *isolate->factory()->NewFunctionFromSharedFunctionInfo(shared, context, | 565 return *isolate->factory()->NewFunctionFromSharedFunctionInfo(shared, context, |
614 pretenure_flag); | 566 pretenure_flag); |
615 } | 567 } |
616 | 568 |
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1172 | 1124 |
1173 // Lookup in the initial Object.prototype object. | 1125 // Lookup in the initial Object.prototype object. |
1174 Handle<Object> result; | 1126 Handle<Object> result; |
1175 ASSIGN_RETURN_FAILURE_ON_EXCEPTION( | 1127 ASSIGN_RETURN_FAILURE_ON_EXCEPTION( |
1176 isolate, result, | 1128 isolate, result, |
1177 Object::GetProperty(isolate->initial_object_prototype(), key)); | 1129 Object::GetProperty(isolate->initial_object_prototype(), key)); |
1178 return *result; | 1130 return *result; |
1179 } | 1131 } |
1180 } // namespace internal | 1132 } // namespace internal |
1181 } // namespace v8 | 1133 } // namespace v8 |
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