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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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636 output_frame->SetPc(reinterpret_cast<intptr_t>( | 636 output_frame->SetPc(reinterpret_cast<intptr_t>( |
637 trampoline->instruction_start())); | 637 trampoline->instruction_start())); |
638 output_frame->SetState(Smi::FromInt(FullCodeGenerator::NO_REGISTERS)); | 638 output_frame->SetState(Smi::FromInt(FullCodeGenerator::NO_REGISTERS)); |
639 Code* notify_failure = | 639 Code* notify_failure = |
640 isolate_->builtins()->builtin(Builtins::kNotifyStubFailure); | 640 isolate_->builtins()->builtin(Builtins::kNotifyStubFailure); |
641 output_frame->SetContinuation( | 641 output_frame->SetContinuation( |
642 reinterpret_cast<intptr_t>(notify_failure->entry())); | 642 reinterpret_cast<intptr_t>(notify_failure->entry())); |
643 } | 643 } |
644 | 644 |
645 | 645 |
646 void Deoptimizer::DoComputeConstructStubFrame(TranslationIterator* iterator, | |
647 int frame_index) { | |
648 Builtins* builtins = isolate_->builtins(); | |
649 Code* construct_stub = builtins->builtin(Builtins::kJSConstructStubGeneric); | |
650 JSFunction* function = JSFunction::cast(ComputeLiteral(iterator->Next())); | |
651 unsigned height = iterator->Next(); | |
652 unsigned height_in_bytes = height * kPointerSize; | |
653 if (trace_) { | |
654 PrintF(" translating construct stub => height=%d\n", height_in_bytes); | |
655 } | |
656 | |
657 unsigned fixed_frame_size = 7 * kPointerSize; | |
658 unsigned output_frame_size = height_in_bytes + fixed_frame_size; | |
659 | |
660 // Allocate and store the output frame description. | |
661 FrameDescription* output_frame = | |
662 new(output_frame_size) FrameDescription(output_frame_size, function); | |
663 output_frame->SetFrameType(StackFrame::CONSTRUCT); | |
664 | |
665 // Construct stub can not be topmost or bottommost. | |
666 ASSERT(frame_index > 0 && frame_index < output_count_ - 1); | |
667 ASSERT(output_[frame_index] == NULL); | |
668 output_[frame_index] = output_frame; | |
669 | |
670 // The top address of the frame is computed from the previous | |
671 // frame's top and this frame's size. | |
672 uint32_t top_address; | |
673 top_address = output_[frame_index - 1]->GetTop() - output_frame_size; | |
674 output_frame->SetTop(top_address); | |
675 | |
676 // Compute the incoming parameter translation. | |
677 int parameter_count = height; | |
678 unsigned output_offset = output_frame_size; | |
679 for (int i = 0; i < parameter_count; ++i) { | |
680 output_offset -= kPointerSize; | |
681 DoTranslateCommand(iterator, frame_index, output_offset); | |
682 } | |
683 | |
684 // Read caller's PC from the previous frame. | |
685 output_offset -= kPointerSize; | |
686 intptr_t callers_pc = output_[frame_index - 1]->GetPc(); | |
687 output_frame->SetFrameSlot(output_offset, callers_pc); | |
688 if (trace_) { | |
689 PrintF(" 0x%08x: [top + %d] <- 0x%08x ; caller's pc\n", | |
690 top_address + output_offset, output_offset, callers_pc); | |
691 } | |
692 | |
693 // Read caller's FP from the previous frame, and set this frame's FP. | |
694 output_offset -= kPointerSize; | |
695 intptr_t value = output_[frame_index - 1]->GetFp(); | |
696 output_frame->SetFrameSlot(output_offset, value); | |
697 intptr_t fp_value = top_address + output_offset; | |
698 output_frame->SetFp(fp_value); | |
699 if (trace_) { | |
700 PrintF(" 0x%08x: [top + %d] <- 0x%08x ; caller's fp\n", | |
701 fp_value, output_offset, value); | |
702 } | |
703 | |
704 // The context can be gotten from the previous frame. | |
705 output_offset -= kPointerSize; | |
706 value = output_[frame_index - 1]->GetContext(); | |
707 output_frame->SetFrameSlot(output_offset, value); | |
708 if (trace_) { | |
709 PrintF(" 0x%08x: [top + %d] <- 0x%08x ; context\n", | |
710 top_address + output_offset, output_offset, value); | |
711 } | |
712 | |
713 // A marker value is used in place of the function. | |
714 output_offset -= kPointerSize; | |
715 value = reinterpret_cast<intptr_t>(Smi::FromInt(StackFrame::CONSTRUCT)); | |
716 output_frame->SetFrameSlot(output_offset, value); | |
717 if (trace_) { | |
718 PrintF(" 0x%08x: [top + %d] <- 0x%08x ; function (construct sentinel)\n", | |
719 top_address + output_offset, output_offset, value); | |
720 } | |
721 | |
722 // The output frame reflects a JSConstructStubGeneric frame. | |
723 output_offset -= kPointerSize; | |
724 value = reinterpret_cast<intptr_t>(construct_stub); | |
725 output_frame->SetFrameSlot(output_offset, value); | |
726 if (trace_) { | |
727 PrintF(" 0x%08x: [top + %d] <- 0x%08x ; code object\n", | |
728 top_address + output_offset, output_offset, value); | |
729 } | |
730 | |
731 // Number of incoming arguments. | |
732 output_offset -= kPointerSize; | |
733 value = reinterpret_cast<uint32_t>(Smi::FromInt(height - 1)); | |
734 output_frame->SetFrameSlot(output_offset, value); | |
735 if (trace_) { | |
736 PrintF(" 0x%08x: [top + %d] <- 0x%08x ; argc (%d)\n", | |
737 top_address + output_offset, output_offset, value, height - 1); | |
738 } | |
739 | |
740 // The newly allocated object was passed as receiver in the artificial | |
741 // constructor stub environment created by HEnvironment::CopyForInlining(). | |
742 output_offset -= kPointerSize; | |
743 value = output_frame->GetFrameSlot(output_frame_size - kPointerSize); | |
744 output_frame->SetFrameSlot(output_offset, value); | |
745 if (trace_) { | |
746 PrintF(" 0x%08x: [top + %d] <- 0x%08x ; allocated receiver\n", | |
747 top_address + output_offset, output_offset, value); | |
748 } | |
749 | |
750 ASSERT(0 == output_offset); | |
751 | |
752 uint32_t pc = reinterpret_cast<uint32_t>( | |
753 construct_stub->instruction_start() + | |
754 isolate_->heap()->construct_stub_deopt_pc_offset()->value()); | |
755 output_frame->SetPc(pc); | |
756 } | |
757 | |
758 | |
759 void Deoptimizer::DoComputeJSFrame(TranslationIterator* iterator, | 646 void Deoptimizer::DoComputeJSFrame(TranslationIterator* iterator, |
760 int frame_index) { | 647 int frame_index) { |
761 BailoutId node_id = BailoutId(iterator->Next()); | 648 BailoutId node_id = BailoutId(iterator->Next()); |
762 JSFunction* function; | 649 JSFunction* function; |
763 if (frame_index != 0) { | 650 if (frame_index != 0) { |
764 function = JSFunction::cast(ComputeLiteral(iterator->Next())); | 651 function = JSFunction::cast(ComputeLiteral(iterator->Next())); |
765 } else { | 652 } else { |
766 int closure_id = iterator->Next(); | 653 int closure_id = iterator->Next(); |
767 USE(closure_id); | 654 USE(closure_id); |
768 ASSERT_EQ(Translation::kSelfLiteralId, closure_id); | 655 ASSERT_EQ(Translation::kSelfLiteralId, closure_id); |
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1175 } | 1062 } |
1176 __ bind(&done); | 1063 __ bind(&done); |
1177 } | 1064 } |
1178 | 1065 |
1179 #undef __ | 1066 #undef __ |
1180 | 1067 |
1181 | 1068 |
1182 } } // namespace v8::internal | 1069 } } // namespace v8::internal |
1183 | 1070 |
1184 #endif // V8_TARGET_ARCH_IA32 | 1071 #endif // V8_TARGET_ARCH_IA32 |
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