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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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685 | 685 |
686 // rcx must be used to pass the pointer to the return value slot. | 686 // rcx must be used to pass the pointer to the return value slot. |
687 lea(rcx, StackSpaceOperand(arg_stack_space)); | 687 lea(rcx, StackSpaceOperand(arg_stack_space)); |
688 #else | 688 #else |
689 EnterApiExitFrame(arg_stack_space); | 689 EnterApiExitFrame(arg_stack_space); |
690 #endif | 690 #endif |
691 } | 691 } |
692 | 692 |
693 | 693 |
694 void MacroAssembler::CallApiFunctionAndReturn(Address function_address, | 694 void MacroAssembler::CallApiFunctionAndReturn(Address function_address, |
695 int stack_space) { | 695 int stack_space, |
696 Label empty_result; | 696 int return_value_offset) { |
697 Label prologue; | 697 Label prologue; |
698 Label promote_scheduled_exception; | 698 Label promote_scheduled_exception; |
699 Label delete_allocated_handles; | 699 Label delete_allocated_handles; |
700 Label leave_exit_frame; | 700 Label leave_exit_frame; |
701 Label write_back; | 701 Label write_back; |
702 | 702 |
703 Factory* factory = isolate()->factory(); | 703 Factory* factory = isolate()->factory(); |
704 ExternalReference next_address = | 704 ExternalReference next_address = |
705 ExternalReference::handle_scope_next_address(isolate()); | 705 ExternalReference::handle_scope_next_address(isolate()); |
706 const int kNextOffset = 0; | 706 const int kNextOffset = 0; |
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738 | 738 |
739 if (FLAG_log_timer_events) { | 739 if (FLAG_log_timer_events) { |
740 FrameScope frame(this, StackFrame::MANUAL); | 740 FrameScope frame(this, StackFrame::MANUAL); |
741 PushSafepointRegisters(); | 741 PushSafepointRegisters(); |
742 PrepareCallCFunction(1); | 742 PrepareCallCFunction(1); |
743 LoadAddress(arg_reg_1, ExternalReference::isolate_address(isolate())); | 743 LoadAddress(arg_reg_1, ExternalReference::isolate_address(isolate())); |
744 CallCFunction(ExternalReference::log_leave_external_function(isolate()), 1); | 744 CallCFunction(ExternalReference::log_leave_external_function(isolate()), 1); |
745 PopSafepointRegisters(); | 745 PopSafepointRegisters(); |
746 } | 746 } |
747 | 747 |
| 748 // Can skip the result check for new-style callbacks |
| 749 // TODO(dcarney): may need to pass this information down |
| 750 // as some function_addresses might not have been registered |
| 751 if (!CallbackTable::ReturnsVoid(isolate(), function_address)) { |
| 752 Label empty_result; |
748 #if defined(_WIN64) && !defined(__MINGW64__) | 753 #if defined(_WIN64) && !defined(__MINGW64__) |
749 // rax keeps a pointer to v8::Handle, unpack it. | 754 // rax keeps a pointer to v8::Handle, unpack it. |
750 movq(rax, Operand(rax, 0)); | 755 movq(rax, Operand(rax, 0)); |
751 #endif | 756 #endif |
752 // Check if the result handle holds 0. | 757 // Check if the result handle holds 0. |
753 testq(rax, rax); | 758 testq(rax, rax); |
754 j(zero, &empty_result); | 759 j(zero, &empty_result); |
755 // It was non-zero. Dereference to get the result value. | 760 // It was non-zero. Dereference to get the result value. |
756 movq(rax, Operand(rax, 0)); | 761 movq(rax, Operand(rax, 0)); |
| 762 jmp(&prologue); |
| 763 bind(&empty_result); |
| 764 } |
| 765 // Load the value from ReturnValue |
| 766 movq(rax, StackSpaceOperand(0)); |
| 767 movq(rax, Operand(rax, return_value_offset * kPointerSize)); |
757 bind(&prologue); | 768 bind(&prologue); |
758 | 769 |
759 // No more valid handles (the result handle was the last one). Restore | 770 // No more valid handles (the result handle was the last one). Restore |
760 // previous handle scope. | 771 // previous handle scope. |
761 subl(Operand(base_reg, kLevelOffset), Immediate(1)); | 772 subl(Operand(base_reg, kLevelOffset), Immediate(1)); |
762 movq(Operand(base_reg, kNextOffset), prev_next_address_reg); | 773 movq(Operand(base_reg, kNextOffset), prev_next_address_reg); |
763 cmpq(prev_limit_reg, Operand(base_reg, kLimitOffset)); | 774 cmpq(prev_limit_reg, Operand(base_reg, kLimitOffset)); |
764 j(not_equal, &delete_allocated_handles); | 775 j(not_equal, &delete_allocated_handles); |
765 bind(&leave_exit_frame); | 776 bind(&leave_exit_frame); |
766 | 777 |
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800 j(equal, &ok, Label::kNear); | 811 j(equal, &ok, Label::kNear); |
801 | 812 |
802 Abort("API call returned invalid object"); | 813 Abort("API call returned invalid object"); |
803 | 814 |
804 bind(&ok); | 815 bind(&ok); |
805 #endif | 816 #endif |
806 | 817 |
807 LeaveApiExitFrame(); | 818 LeaveApiExitFrame(); |
808 ret(stack_space * kPointerSize); | 819 ret(stack_space * kPointerSize); |
809 | 820 |
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); | 821 bind(&promote_scheduled_exception); |
816 TailCallRuntime(Runtime::kPromoteScheduledException, 0, 1); | 822 TailCallRuntime(Runtime::kPromoteScheduledException, 0, 1); |
817 | 823 |
818 // HandleScope limit has changed. Delete allocated extensions. | 824 // HandleScope limit has changed. Delete allocated extensions. |
819 bind(&delete_allocated_handles); | 825 bind(&delete_allocated_handles); |
820 movq(Operand(base_reg, kLimitOffset), prev_limit_reg); | 826 movq(Operand(base_reg, kLimitOffset), prev_limit_reg); |
821 movq(prev_limit_reg, rax); | 827 movq(prev_limit_reg, rax); |
822 LoadAddress(arg_reg_1, ExternalReference::isolate_address(isolate())); | 828 LoadAddress(arg_reg_1, ExternalReference::isolate_address(isolate())); |
823 LoadAddress(rax, | 829 LoadAddress(rax, |
824 ExternalReference::delete_handle_scope_extensions(isolate())); | 830 ExternalReference::delete_handle_scope_extensions(isolate())); |
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4635 j(greater, &no_info_available); | 4641 j(greater, &no_info_available); |
4636 CompareRoot(MemOperand(scratch_reg, -AllocationSiteInfo::kSize), | 4642 CompareRoot(MemOperand(scratch_reg, -AllocationSiteInfo::kSize), |
4637 Heap::kAllocationSiteInfoMapRootIndex); | 4643 Heap::kAllocationSiteInfoMapRootIndex); |
4638 bind(&no_info_available); | 4644 bind(&no_info_available); |
4639 } | 4645 } |
4640 | 4646 |
4641 | 4647 |
4642 } } // namespace v8::internal | 4648 } } // namespace v8::internal |
4643 | 4649 |
4644 #endif // V8_TARGET_ARCH_X64 | 4650 #endif // V8_TARGET_ARCH_X64 |
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