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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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| 193 node->set_next(data->deoptimizing_code_list_); | 193 node->set_next(data->deoptimizing_code_list_); |
| 194 data->deoptimizing_code_list_ = node; | 194 data->deoptimizing_code_list_ = node; |
| 195 | 195 |
| 196 // We might be in the middle of incremental marking with compaction. | 196 // We might be in the middle of incremental marking with compaction. |
| 197 // Tell collector to treat this code object in a special way and | 197 // Tell collector to treat this code object in a special way and |
| 198 // ignore all slots that might have been recorded on it. | 198 // ignore all slots that might have been recorded on it. |
| 199 isolate->heap()->mark_compact_collector()->InvalidateCode(code); | 199 isolate->heap()->mark_compact_collector()->InvalidateCode(code); |
| 200 | 200 |
| 201 // Iterate over all the functions which share the same code object | 201 // Iterate over all the functions which share the same code object |
| 202 // and make them use unoptimized version. | 202 // and make them use unoptimized version. |
| 203 Context* context = function->context()->native_context(); | 203 Context* context = function->context()->global_context(); |
| 204 Object* element = context->get(Context::OPTIMIZED_FUNCTIONS_LIST); | 204 Object* element = context->get(Context::OPTIMIZED_FUNCTIONS_LIST); |
| 205 SharedFunctionInfo* shared = function->shared(); | 205 SharedFunctionInfo* shared = function->shared(); |
| 206 while (!element->IsUndefined()) { | 206 while (!element->IsUndefined()) { |
| 207 JSFunction* func = JSFunction::cast(element); | 207 JSFunction* func = JSFunction::cast(element); |
| 208 // Grab element before code replacement as ReplaceCode alters the list. | 208 // Grab element before code replacement as ReplaceCode alters the list. |
| 209 element = func->next_function_link(); | 209 element = func->next_function_link(); |
| 210 if (func->code() == code) { | 210 if (func->code() == code) { |
| 211 func->ReplaceCode(shared->code()); | 211 func->ReplaceCode(shared->code()); |
| 212 } | 212 } |
| 213 } | 213 } |
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| 687 | 687 |
| 688 ASSERT(0 == output_offset); | 688 ASSERT(0 == output_offset); |
| 689 | 689 |
| 690 uint32_t pc = reinterpret_cast<uint32_t>( | 690 uint32_t pc = reinterpret_cast<uint32_t>( |
| 691 construct_stub->instruction_start() + | 691 construct_stub->instruction_start() + |
| 692 isolate_->heap()->construct_stub_deopt_pc_offset()->value()); | 692 isolate_->heap()->construct_stub_deopt_pc_offset()->value()); |
| 693 output_frame->SetPc(pc); | 693 output_frame->SetPc(pc); |
| 694 } | 694 } |
| 695 | 695 |
| 696 | 696 |
| 697 void Deoptimizer::DoComputeSetterStubFrame(TranslationIterator* iterator, | |
| 698 int frame_index) { | |
| 699 JSFunction* setter = JSFunction::cast(ComputeLiteral(iterator->Next())); | |
| 700 // The receiver and the implicit return value are expected in registers by the | |
| 701 // StoreIC, so they don't belong to the output stack frame. This means that we | |
| 702 // have to use a height of 0. | |
| 703 unsigned height = 0; | |
| 704 unsigned height_in_bytes = height * kPointerSize; | |
| 705 if (FLAG_trace_deopt) { | |
| 706 PrintF(" translating setter stub => height=%u\n", height_in_bytes); | |
| 707 } | |
| 708 | |
| 709 // We need 1 stack entry for the return address + 4 stack entries from | |
| 710 // StackFrame::INTERNAL (FP, context, frame type, code object, see | |
| 711 // MacroAssembler::EnterFrame) + 1 stack entry from setter stub (implicit | |
| 712 // return value, see StoreStubCompiler::CompileStoreViaSetter). | |
| 713 unsigned fixed_frame_size = (1 + 4 + 1) * kPointerSize; | |
| 714 unsigned output_frame_size = height_in_bytes + fixed_frame_size; | |
| 715 | |
| 716 // Allocate and store the output frame description. | |
| 717 FrameDescription* output_frame = | |
| 718 new(output_frame_size) FrameDescription(output_frame_size, setter); | |
| 719 output_frame->SetFrameType(StackFrame::INTERNAL); | |
| 720 | |
| 721 // A frame for a setter stub can not be the topmost or bottommost one. | |
| 722 ASSERT(frame_index > 0 && frame_index < output_count_ - 1); | |
| 723 ASSERT(output_[frame_index] == NULL); | |
| 724 output_[frame_index] = output_frame; | |
| 725 | |
| 726 // The top address of the frame is computed from the previous frame's top and | |
| 727 // this frame's size. | |
| 728 intptr_t top_address = output_[frame_index - 1]->GetTop() - output_frame_size; | |
| 729 output_frame->SetTop(top_address); | |
| 730 | |
| 731 unsigned output_offset = output_frame_size; | |
| 732 | |
| 733 // Read caller's PC from the previous frame. | |
| 734 output_offset -= kPointerSize; | |
| 735 intptr_t callers_pc = output_[frame_index - 1]->GetPc(); | |
| 736 output_frame->SetFrameSlot(output_offset, callers_pc); | |
| 737 if (FLAG_trace_deopt) { | |
| 738 PrintF(" 0x%08" V8PRIxPTR ": [top + %u] <- 0x%08" V8PRIxPTR | |
| 739 " ; caller's pc\n", | |
| 740 top_address + output_offset, output_offset, callers_pc); | |
| 741 } | |
| 742 | |
| 743 // Read caller's FP from the previous frame, and set this frame's FP. | |
| 744 output_offset -= kPointerSize; | |
| 745 intptr_t value = output_[frame_index - 1]->GetFp(); | |
| 746 output_frame->SetFrameSlot(output_offset, value); | |
| 747 intptr_t fp_value = top_address + output_offset; | |
| 748 output_frame->SetFp(fp_value); | |
| 749 if (FLAG_trace_deopt) { | |
| 750 PrintF(" 0x%08" V8PRIxPTR ": [top + %u] <- 0x%08" V8PRIxPTR | |
| 751 " ; caller's fp\n", | |
| 752 fp_value, output_offset, value); | |
| 753 } | |
| 754 | |
| 755 // The context can be gotten from the previous frame. | |
| 756 output_offset -= kPointerSize; | |
| 757 value = output_[frame_index - 1]->GetContext(); | |
| 758 output_frame->SetFrameSlot(output_offset, value); | |
| 759 if (FLAG_trace_deopt) { | |
| 760 PrintF(" 0x%08" V8PRIxPTR ": [top + %u] <- 0x%08" V8PRIxPTR | |
| 761 " ; context\n", | |
| 762 top_address + output_offset, output_offset, value); | |
| 763 } | |
| 764 | |
| 765 // A marker value is used in place of the function. | |
| 766 output_offset -= kPointerSize; | |
| 767 value = reinterpret_cast<intptr_t>(Smi::FromInt(StackFrame::INTERNAL)); | |
| 768 output_frame->SetFrameSlot(output_offset, value); | |
| 769 if (FLAG_trace_deopt) { | |
| 770 PrintF(" 0x%08" V8PRIxPTR ": [top + %u] <- 0x%08" V8PRIxPTR | |
| 771 " ; function (setter sentinel)\n", | |
| 772 top_address + output_offset, output_offset, value); | |
| 773 } | |
| 774 | |
| 775 // Get Code object from setter stub. | |
| 776 output_offset -= kPointerSize; | |
| 777 Code* setter_stub = | |
| 778 isolate_->builtins()->builtin(Builtins::kStoreIC_Setter_ForDeopt); | |
| 779 value = reinterpret_cast<intptr_t>(setter_stub); | |
| 780 output_frame->SetFrameSlot(output_offset, value); | |
| 781 if (FLAG_trace_deopt) { | |
| 782 PrintF(" 0x%08" V8PRIxPTR ": [top + %u] <- 0x%08" V8PRIxPTR | |
| 783 " ; code object\n", | |
| 784 top_address + output_offset, output_offset, value); | |
| 785 } | |
| 786 | |
| 787 // Skip receiver. | |
| 788 Translation::Opcode opcode = | |
| 789 static_cast<Translation::Opcode>(iterator->Next()); | |
| 790 iterator->Skip(Translation::NumberOfOperandsFor(opcode)); | |
| 791 | |
| 792 // The implicit return value was part of the artificial setter stub | |
| 793 // environment. | |
| 794 output_offset -= kPointerSize; | |
| 795 DoTranslateCommand(iterator, frame_index, output_offset); | |
| 796 | |
| 797 ASSERT(0 == output_offset); | |
| 798 | |
| 799 intptr_t pc = reinterpret_cast<intptr_t>( | |
| 800 setter_stub->instruction_start() + | |
| 801 isolate_->heap()->setter_stub_deopt_pc_offset()->value()); | |
| 802 output_frame->SetPc(pc); | |
| 803 } | |
| 804 | |
| 805 | |
| 806 void Deoptimizer::DoComputeJSFrame(TranslationIterator* iterator, | 697 void Deoptimizer::DoComputeJSFrame(TranslationIterator* iterator, |
| 807 int frame_index) { | 698 int frame_index) { |
| 808 BailoutId node_id = BailoutId(iterator->Next()); | 699 BailoutId node_id = BailoutId(iterator->Next()); |
| 809 JSFunction* function; | 700 JSFunction* function; |
| 810 if (frame_index != 0) { | 701 if (frame_index != 0) { |
| 811 function = JSFunction::cast(ComputeLiteral(iterator->Next())); | 702 function = JSFunction::cast(ComputeLiteral(iterator->Next())); |
| 812 } else { | 703 } else { |
| 813 int closure_id = iterator->Next(); | 704 int closure_id = iterator->Next(); |
| 814 USE(closure_id); | 705 USE(closure_id); |
| 815 ASSERT_EQ(Translation::kSelfLiteralId, closure_id); | 706 ASSERT_EQ(Translation::kSelfLiteralId, closure_id); |
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| 1203 } | 1094 } |
| 1204 __ bind(&done); | 1095 __ bind(&done); |
| 1205 } | 1096 } |
| 1206 | 1097 |
| 1207 #undef __ | 1098 #undef __ |
| 1208 | 1099 |
| 1209 | 1100 |
| 1210 } } // namespace v8::internal | 1101 } } // namespace v8::internal |
| 1211 | 1102 |
| 1212 #endif // V8_TARGET_ARCH_IA32 | 1103 #endif // V8_TARGET_ARCH_IA32 |
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