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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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848 __ neg(rbx); | 848 __ neg(rbx); |
849 if (mode_ == UC16) { | 849 if (mode_ == UC16) { |
850 __ lea(rax, Operand(rdi, rbx, times_2, -char_size())); | 850 __ lea(rax, Operand(rdi, rbx, times_2, -char_size())); |
851 } else { | 851 } else { |
852 __ lea(rax, Operand(rdi, rbx, times_1, -char_size())); | 852 __ lea(rax, Operand(rdi, rbx, times_1, -char_size())); |
853 } | 853 } |
854 // Store this value in a local variable, for use when clearing | 854 // Store this value in a local variable, for use when clearing |
855 // position registers. | 855 // position registers. |
856 __ movq(Operand(rbp, kInputStartMinusOne), rax); | 856 __ movq(Operand(rbp, kInputStartMinusOne), rax); |
857 | 857 |
| 858 #ifdef WIN32 |
| 859 // Ensure that we have written to each stack page, in order. Skipping a page |
| 860 // on Windows can cause segmentation faults. Assuming page size is 4k. |
| 861 const int kPageSize = 4096; |
| 862 const int kRegistersPerPage = kPageSize / kPointerSize; |
| 863 for (int i = num_saved_registers_ + kRegistersPerPage - 1; |
| 864 i < num_registers_; |
| 865 i += kRegistersPerPage) { |
| 866 __ movq(register_location(i), rax); // One write every page. |
| 867 } |
| 868 #endif // WIN32 |
| 869 |
858 // Initialize code object pointer. | 870 // Initialize code object pointer. |
859 __ Move(code_object_pointer(), masm_.CodeObject()); | 871 __ Move(code_object_pointer(), masm_.CodeObject()); |
860 | 872 |
861 Label load_char_start_regexp, start_regexp; | 873 Label load_char_start_regexp, start_regexp; |
862 // Load newline if index is at start, previous character otherwise. | 874 // Load newline if index is at start, previous character otherwise. |
863 __ cmpb(Operand(rbp, kStartIndex), Immediate(0)); | 875 __ cmpb(Operand(rbp, kStartIndex), Immediate(0)); |
864 __ j(not_equal, &load_char_start_regexp, Label::kNear); | 876 __ j(not_equal, &load_char_start_regexp, Label::kNear); |
865 __ Set(current_character(), '\n'); | 877 __ Set(current_character(), '\n'); |
866 __ jmp(&start_regexp, Label::kNear); | 878 __ jmp(&start_regexp, Label::kNear); |
867 | 879 |
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1519 } | 1531 } |
1520 } | 1532 } |
1521 | 1533 |
1522 #undef __ | 1534 #undef __ |
1523 | 1535 |
1524 #endif // V8_INTERPRETED_REGEXP | 1536 #endif // V8_INTERPRETED_REGEXP |
1525 | 1537 |
1526 }} // namespace v8::internal | 1538 }} // namespace v8::internal |
1527 | 1539 |
1528 #endif // V8_TARGET_ARCH_X64 | 1540 #endif // V8_TARGET_ARCH_X64 |
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