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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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670 | 670 |
671 | 671 |
672 static int Offset(ExternalReference ref0, ExternalReference ref1) { | 672 static int Offset(ExternalReference ref0, ExternalReference ref1) { |
673 int64_t offset = (ref0.address() - ref1.address()); | 673 int64_t offset = (ref0.address() - ref1.address()); |
674 // Check that fits into int. | 674 // Check that fits into int. |
675 ASSERT(static_cast<int>(offset) == offset); | 675 ASSERT(static_cast<int>(offset) == offset); |
676 return static_cast<int>(offset); | 676 return static_cast<int>(offset); |
677 } | 677 } |
678 | 678 |
679 | 679 |
680 void MacroAssembler::PrepareCallApiFunction(int arg_stack_space) { | 680 void MacroAssembler::PrepareCallApiFunction(int arg_stack_space, |
| 681 bool returns_handle) { |
681 #if defined(_WIN64) && !defined(__MINGW64__) | 682 #if defined(_WIN64) && !defined(__MINGW64__) |
| 683 if (!returns_handle) { |
| 684 EnterApiExitFrame(arg_stack_space); |
| 685 return; |
| 686 } |
682 // We need to prepare a slot for result handle on stack and put | 687 // We need to prepare a slot for result handle on stack and put |
683 // a pointer to it into 1st arg register. | 688 // a pointer to it into 1st arg register. |
684 EnterApiExitFrame(arg_stack_space + 1); | 689 EnterApiExitFrame(arg_stack_space + 1); |
685 | 690 |
686 // rcx must be used to pass the pointer to the return value slot. | 691 // rcx must be used to pass the pointer to the return value slot. |
687 lea(rcx, StackSpaceOperand(arg_stack_space)); | 692 lea(rcx, StackSpaceOperand(arg_stack_space)); |
688 #else | 693 #else |
689 EnterApiExitFrame(arg_stack_space); | 694 EnterApiExitFrame(arg_stack_space); |
690 #endif | 695 #endif |
691 } | 696 } |
692 | 697 |
693 | 698 |
694 void MacroAssembler::CallApiFunctionAndReturn(Address function_address, | 699 void MacroAssembler::CallApiFunctionAndReturn(Address function_address, |
695 int stack_space) { | 700 int stack_space, |
696 Label empty_result; | 701 bool returns_handle, |
| 702 int return_value_offset) { |
697 Label prologue; | 703 Label prologue; |
698 Label promote_scheduled_exception; | 704 Label promote_scheduled_exception; |
699 Label delete_allocated_handles; | 705 Label delete_allocated_handles; |
700 Label leave_exit_frame; | 706 Label leave_exit_frame; |
701 Label write_back; | 707 Label write_back; |
702 | 708 |
703 Factory* factory = isolate()->factory(); | 709 Factory* factory = isolate()->factory(); |
704 ExternalReference next_address = | 710 ExternalReference next_address = |
705 ExternalReference::handle_scope_next_address(isolate()); | 711 ExternalReference::handle_scope_next_address(isolate()); |
706 const int kNextOffset = 0; | 712 const int kNextOffset = 0; |
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738 | 744 |
739 if (FLAG_log_timer_events) { | 745 if (FLAG_log_timer_events) { |
740 FrameScope frame(this, StackFrame::MANUAL); | 746 FrameScope frame(this, StackFrame::MANUAL); |
741 PushSafepointRegisters(); | 747 PushSafepointRegisters(); |
742 PrepareCallCFunction(1); | 748 PrepareCallCFunction(1); |
743 LoadAddress(arg_reg_1, ExternalReference::isolate_address(isolate())); | 749 LoadAddress(arg_reg_1, ExternalReference::isolate_address(isolate())); |
744 CallCFunction(ExternalReference::log_leave_external_function(isolate()), 1); | 750 CallCFunction(ExternalReference::log_leave_external_function(isolate()), 1); |
745 PopSafepointRegisters(); | 751 PopSafepointRegisters(); |
746 } | 752 } |
747 | 753 |
| 754 // Can skip the result check for new-style callbacks |
| 755 // TODO(dcarney): may need to pass this information down |
| 756 // as some function_addresses might not have been registered |
| 757 if (returns_handle) { |
| 758 Label empty_result; |
748 #if defined(_WIN64) && !defined(__MINGW64__) | 759 #if defined(_WIN64) && !defined(__MINGW64__) |
749 // rax keeps a pointer to v8::Handle, unpack it. | 760 // rax keeps a pointer to v8::Handle, unpack it. |
750 movq(rax, Operand(rax, 0)); | 761 movq(rax, Operand(rax, 0)); |
751 #endif | 762 #endif |
752 // Check if the result handle holds 0. | 763 // Check if the result handle holds 0. |
753 testq(rax, rax); | 764 testq(rax, rax); |
754 j(zero, &empty_result); | 765 j(zero, &empty_result); |
755 // It was non-zero. Dereference to get the result value. | 766 // It was non-zero. Dereference to get the result value. |
756 movq(rax, Operand(rax, 0)); | 767 movq(rax, Operand(rax, 0)); |
| 768 jmp(&prologue); |
| 769 bind(&empty_result); |
| 770 } |
| 771 // Load the value from ReturnValue |
| 772 movq(rax, Operand(rbp, return_value_offset * kPointerSize)); |
757 bind(&prologue); | 773 bind(&prologue); |
758 | 774 |
759 // No more valid handles (the result handle was the last one). Restore | 775 // No more valid handles (the result handle was the last one). Restore |
760 // previous handle scope. | 776 // previous handle scope. |
761 subl(Operand(base_reg, kLevelOffset), Immediate(1)); | 777 subl(Operand(base_reg, kLevelOffset), Immediate(1)); |
762 movq(Operand(base_reg, kNextOffset), prev_next_address_reg); | 778 movq(Operand(base_reg, kNextOffset), prev_next_address_reg); |
763 cmpq(prev_limit_reg, Operand(base_reg, kLimitOffset)); | 779 cmpq(prev_limit_reg, Operand(base_reg, kLimitOffset)); |
764 j(not_equal, &delete_allocated_handles); | 780 j(not_equal, &delete_allocated_handles); |
765 bind(&leave_exit_frame); | 781 bind(&leave_exit_frame); |
766 | 782 |
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800 j(equal, &ok, Label::kNear); | 816 j(equal, &ok, Label::kNear); |
801 | 817 |
802 Abort("API call returned invalid object"); | 818 Abort("API call returned invalid object"); |
803 | 819 |
804 bind(&ok); | 820 bind(&ok); |
805 #endif | 821 #endif |
806 | 822 |
807 LeaveApiExitFrame(); | 823 LeaveApiExitFrame(); |
808 ret(stack_space * kPointerSize); | 824 ret(stack_space * kPointerSize); |
809 | 825 |
810 bind(&empty_result); | |
811 // It was zero; the result is undefined. | |
812 LoadRoot(rax, Heap::kUndefinedValueRootIndex); | |
813 jmp(&prologue); | |
814 | |
815 bind(&promote_scheduled_exception); | 826 bind(&promote_scheduled_exception); |
816 TailCallRuntime(Runtime::kPromoteScheduledException, 0, 1); | 827 TailCallRuntime(Runtime::kPromoteScheduledException, 0, 1); |
817 | 828 |
818 // HandleScope limit has changed. Delete allocated extensions. | 829 // HandleScope limit has changed. Delete allocated extensions. |
819 bind(&delete_allocated_handles); | 830 bind(&delete_allocated_handles); |
820 movq(Operand(base_reg, kLimitOffset), prev_limit_reg); | 831 movq(Operand(base_reg, kLimitOffset), prev_limit_reg); |
821 movq(prev_limit_reg, rax); | 832 movq(prev_limit_reg, rax); |
822 LoadAddress(arg_reg_1, ExternalReference::isolate_address(isolate())); | 833 LoadAddress(arg_reg_1, ExternalReference::isolate_address(isolate())); |
823 LoadAddress(rax, | 834 LoadAddress(rax, |
824 ExternalReference::delete_handle_scope_extensions(isolate())); | 835 ExternalReference::delete_handle_scope_extensions(isolate())); |
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4672 j(greater, &no_info_available); | 4683 j(greater, &no_info_available); |
4673 CompareRoot(MemOperand(scratch_reg, -AllocationSiteInfo::kSize), | 4684 CompareRoot(MemOperand(scratch_reg, -AllocationSiteInfo::kSize), |
4674 Heap::kAllocationSiteInfoMapRootIndex); | 4685 Heap::kAllocationSiteInfoMapRootIndex); |
4675 bind(&no_info_available); | 4686 bind(&no_info_available); |
4676 } | 4687 } |
4677 | 4688 |
4678 | 4689 |
4679 } } // namespace v8::internal | 4690 } } // namespace v8::internal |
4680 | 4691 |
4681 #endif // V8_TARGET_ARCH_X64 | 4692 #endif // V8_TARGET_ARCH_X64 |
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