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| 1 // Copyright 2012 the V8 project authors. All rights reserved. | 1 // Copyright 2012 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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| 14512 return object; | 14512 return object; |
| 14513 } | 14513 } |
| 14514 | 14514 |
| 14515 | 14515 |
| 14516 static MaybeObject* ArrayConstructorCommon(Isolate* isolate, | 14516 static MaybeObject* ArrayConstructorCommon(Isolate* isolate, |
| 14517 Handle<JSFunction> constructor, | 14517 Handle<JSFunction> constructor, |
| 14518 Handle<Object> type_info, | 14518 Handle<Object> type_info, |
| 14519 Arguments* caller_args) { | 14519 Arguments* caller_args) { |
| 14520 bool holey = false; | 14520 bool holey = false; |
| 14521 bool can_use_type_feedback = true; | 14521 bool can_use_type_feedback = true; |
| 14522 Heap* heap = isolate->heap(); |
| 14522 if (caller_args->length() == 1) { | 14523 if (caller_args->length() == 1) { |
| 14523 Object* argument_one = (*caller_args)[0]; | 14524 Object* argument_one = (*caller_args)[0]; |
| 14524 if (argument_one->IsSmi()) { | 14525 if (argument_one->IsSmi()) { |
| 14525 int value = Smi::cast(argument_one)->value(); | 14526 int value = Smi::cast(argument_one)->value(); |
| 14526 if (value < 0 || value >= JSObject::kInitialMaxFastElementArray) { | 14527 if (value < 0 || value >= JSObject::InitialMaxFastElementArray(heap)) { |
| 14527 // the array is a dictionary in this case. | 14528 // the array is a dictionary in this case. |
| 14528 can_use_type_feedback = false; | 14529 can_use_type_feedback = false; |
| 14529 } else if (value != 0) { | 14530 } else if (value != 0) { |
| 14530 holey = true; | 14531 holey = true; |
| 14531 } | 14532 } |
| 14532 } else { | 14533 } else { |
| 14533 // Non-smi length argument produces a dictionary | 14534 // Non-smi length argument produces a dictionary |
| 14534 can_use_type_feedback = false; | 14535 can_use_type_feedback = false; |
| 14535 } | 14536 } |
| 14536 } | 14537 } |
| 14537 | 14538 |
| 14538 JSArray* array; | 14539 JSArray* array; |
| 14539 MaybeObject* maybe_array; | 14540 MaybeObject* maybe_array; |
| 14540 if (!type_info.is_null() && | 14541 if (!type_info.is_null() && |
| 14541 *type_info != isolate->heap()->undefined_value() && | 14542 *type_info != heap->undefined_value() && |
| 14542 Cell::cast(*type_info)->value()->IsAllocationSite() && | 14543 Cell::cast(*type_info)->value()->IsAllocationSite() && |
| 14543 can_use_type_feedback) { | 14544 can_use_type_feedback) { |
| 14544 Handle<Cell> cell = Handle<Cell>::cast(type_info); | 14545 Handle<Cell> cell = Handle<Cell>::cast(type_info); |
| 14545 Handle<AllocationSite> site = Handle<AllocationSite>( | 14546 Handle<AllocationSite> site = Handle<AllocationSite>( |
| 14546 AllocationSite::cast(cell->value()), isolate); | 14547 AllocationSite::cast(cell->value()), isolate); |
| 14547 ASSERT(!site->IsLiteralSite()); | 14548 ASSERT(!site->IsLiteralSite()); |
| 14548 ElementsKind to_kind = site->GetElementsKind(); | 14549 ElementsKind to_kind = site->GetElementsKind(); |
| 14549 if (holey && !IsFastHoleyElementsKind(to_kind)) { | 14550 if (holey && !IsFastHoleyElementsKind(to_kind)) { |
| 14550 to_kind = GetHoleyElementsKind(to_kind); | 14551 to_kind = GetHoleyElementsKind(to_kind); |
| 14551 // Update the allocation site info to reflect the advice alteration. | 14552 // Update the allocation site info to reflect the advice alteration. |
| 14552 site->SetElementsKind(to_kind); | 14553 site->SetElementsKind(to_kind); |
| 14553 } | 14554 } |
| 14554 | 14555 |
| 14555 maybe_array = isolate->heap()->AllocateJSObjectWithAllocationSite( | 14556 maybe_array = heap->AllocateJSObjectWithAllocationSite( |
| 14556 *constructor, site); | 14557 *constructor, site); |
| 14557 if (!maybe_array->To(&array)) return maybe_array; | 14558 if (!maybe_array->To(&array)) return maybe_array; |
| 14558 } else { | 14559 } else { |
| 14559 maybe_array = isolate->heap()->AllocateJSObject(*constructor); | 14560 maybe_array = heap->AllocateJSObject(*constructor); |
| 14560 if (!maybe_array->To(&array)) return maybe_array; | 14561 if (!maybe_array->To(&array)) return maybe_array; |
| 14561 // We might need to transition to holey | 14562 // We might need to transition to holey |
| 14562 ElementsKind kind = constructor->initial_map()->elements_kind(); | 14563 ElementsKind kind = constructor->initial_map()->elements_kind(); |
| 14563 if (holey && !IsFastHoleyElementsKind(kind)) { | 14564 if (holey && !IsFastHoleyElementsKind(kind)) { |
| 14564 kind = GetHoleyElementsKind(kind); | 14565 kind = GetHoleyElementsKind(kind); |
| 14565 maybe_array = array->TransitionElementsKind(kind); | 14566 maybe_array = array->TransitionElementsKind(kind); |
| 14566 if (maybe_array->IsFailure()) return maybe_array; | 14567 if (maybe_array->IsFailure()) return maybe_array; |
| 14567 } | 14568 } |
| 14568 } | 14569 } |
| 14569 | 14570 |
| 14570 maybe_array = isolate->heap()->AllocateJSArrayStorage(array, 0, 0, | 14571 maybe_array = heap->AllocateJSArrayStorage(array, 0, 0, |
| 14571 DONT_INITIALIZE_ARRAY_ELEMENTS); | 14572 DONT_INITIALIZE_ARRAY_ELEMENTS); |
| 14572 if (maybe_array->IsFailure()) return maybe_array; | 14573 if (maybe_array->IsFailure()) return maybe_array; |
| 14573 maybe_array = ArrayConstructInitializeElements(array, caller_args); | 14574 maybe_array = ArrayConstructInitializeElements(array, caller_args); |
| 14574 if (maybe_array->IsFailure()) return maybe_array; | 14575 if (maybe_array->IsFailure()) return maybe_array; |
| 14575 return array; | 14576 return array; |
| 14576 } | 14577 } |
| 14577 | 14578 |
| 14578 | 14579 |
| 14579 RUNTIME_FUNCTION(MaybeObject*, Runtime_ArrayConstructor) { | 14580 RUNTIME_FUNCTION(MaybeObject*, Runtime_ArrayConstructor) { |
| 14580 HandleScope scope(isolate); | 14581 HandleScope scope(isolate); |
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| 14695 // Handle last resort GC and make sure to allow future allocations | 14696 // Handle last resort GC and make sure to allow future allocations |
| 14696 // to grow the heap without causing GCs (if possible). | 14697 // to grow the heap without causing GCs (if possible). |
| 14697 isolate->counters()->gc_last_resort_from_js()->Increment(); | 14698 isolate->counters()->gc_last_resort_from_js()->Increment(); |
| 14698 isolate->heap()->CollectAllGarbage(Heap::kNoGCFlags, | 14699 isolate->heap()->CollectAllGarbage(Heap::kNoGCFlags, |
| 14699 "Runtime::PerformGC"); | 14700 "Runtime::PerformGC"); |
| 14700 } | 14701 } |
| 14701 } | 14702 } |
| 14702 | 14703 |
| 14703 | 14704 |
| 14704 } } // namespace v8::internal | 14705 } } // namespace v8::internal |
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