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1 // Copyright 2006-2009 the V8 project authors. All rights reserved. | 1 // Copyright 2006-2009 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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157 Label done; | 157 Label done; |
158 | 158 |
159 // Skip barrier if writing a smi. | 159 // Skip barrier if writing a smi. |
160 ASSERT_EQ(0, kSmiTag); | 160 ASSERT_EQ(0, kSmiTag); |
161 test(value, Immediate(kSmiTagMask)); | 161 test(value, Immediate(kSmiTagMask)); |
162 j(zero, &done); | 162 j(zero, &done); |
163 | 163 |
164 if (Serializer::enabled()) { | 164 if (Serializer::enabled()) { |
165 // Can't do arithmetic on external references if it might get serialized. | 165 // Can't do arithmetic on external references if it might get serialized. |
166 mov(value, Operand(object)); | 166 mov(value, Operand(object)); |
167 and_(value, Heap::NewSpaceMask()); | 167 // The mask isn't really an address. We load it as an external reference in |
| 168 // case the size of the new space is different between the snapshot maker |
| 169 // and the running system. |
| 170 and_(Operand(value), Immediate(ExternalReference::new_space_mask())); |
168 cmp(Operand(value), Immediate(ExternalReference::new_space_start())); | 171 cmp(Operand(value), Immediate(ExternalReference::new_space_start())); |
169 j(equal, &done); | 172 j(equal, &done); |
170 } else { | 173 } else { |
171 int32_t new_space_start = reinterpret_cast<int32_t>( | 174 int32_t new_space_start = reinterpret_cast<int32_t>( |
172 ExternalReference::new_space_start().address()); | 175 ExternalReference::new_space_start().address()); |
173 lea(value, Operand(object, -new_space_start)); | 176 lea(value, Operand(object, -new_space_start)); |
174 and_(value, Heap::NewSpaceMask()); | 177 and_(value, Heap::NewSpaceMask()); |
175 j(equal, &done); | 178 j(equal, &done); |
176 } | 179 } |
177 | 180 |
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1628 // Indicate that code has changed. | 1631 // Indicate that code has changed. |
1629 CPU::FlushICache(address_, size_); | 1632 CPU::FlushICache(address_, size_); |
1630 | 1633 |
1631 // Check that the code was patched as expected. | 1634 // Check that the code was patched as expected. |
1632 ASSERT(masm_.pc_ == address_ + size_); | 1635 ASSERT(masm_.pc_ == address_ + size_); |
1633 ASSERT(masm_.reloc_info_writer.pos() == address_ + size_ + Assembler::kGap); | 1636 ASSERT(masm_.reloc_info_writer.pos() == address_ + size_ + Assembler::kGap); |
1634 } | 1637 } |
1635 | 1638 |
1636 | 1639 |
1637 } } // namespace v8::internal | 1640 } } // namespace v8::internal |
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