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| 1 // Copyright 2010 the V8 project authors. All rights reserved. | 1 // Copyright 2010 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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| 53 Register scratch, | 53 Register scratch, |
| 54 SaveFPRegsMode save_fp) { | 54 SaveFPRegsMode save_fp) { |
| 55 if (FLAG_debug_code) { | 55 if (FLAG_debug_code) { |
| 56 // Check that the object is not in new space. | 56 // Check that the object is not in new space. |
| 57 Label not_in_new_space; | 57 Label not_in_new_space; |
| 58 InNewSpace(object, scratch, not_equal, ¬_in_new_space); | 58 InNewSpace(object, scratch, not_equal, ¬_in_new_space); |
| 59 Abort("new-space object passed to RecordWriteHelper"); | 59 Abort("new-space object passed to RecordWriteHelper"); |
| 60 bind(¬_in_new_space); | 60 bind(¬_in_new_space); |
| 61 } | 61 } |
| 62 | 62 |
| 63 // Load write buffer top. | 63 // Load store buffer top. |
| 64 ExternalReference write_buffer = ExternalReference::write_buffer_top(); | 64 ExternalReference store_buffer = ExternalReference::store_buffer_top(); |
| 65 mov(scratch, Operand::StaticVariable(write_buffer)); | 65 mov(scratch, Operand::StaticVariable(store_buffer)); |
| 66 // Store pointer to buffer. | 66 // Store pointer to buffer. |
| 67 mov(Operand(scratch, 0), addr); | 67 mov(Operand(scratch, 0), addr); |
| 68 // Increment buffer top. | 68 // Increment buffer top. |
| 69 add(Operand(scratch), Immediate(kPointerSize)); | 69 add(Operand(scratch), Immediate(kPointerSize)); |
| 70 // Write back new top of buffer. | 70 // Write back new top of buffer. |
| 71 mov(Operand::StaticVariable(write_buffer), scratch); | 71 mov(Operand::StaticVariable(store_buffer), scratch); |
| 72 // Call stub on end of buffer. | 72 // Call stub on end of buffer. |
| 73 NearLabel no_overflow; | 73 NearLabel no_overflow; |
| 74 // Check for end of buffer. | 74 // Check for end of buffer. |
| 75 test(scratch, Immediate(WriteBuffer::kWriteBufferOverflowBit)); | 75 test(scratch, Immediate(StoreBuffer::kStoreBufferOverflowBit)); |
| 76 j(equal, &no_overflow); | 76 j(equal, &no_overflow); |
| 77 WriteBufferOverflowStub write_buffer_overflow = | 77 StoreBufferOverflowStub store_buffer_overflow = |
| 78 WriteBufferOverflowStub(save_fp); | 78 StoreBufferOverflowStub(save_fp); |
| 79 CallStub(&write_buffer_overflow); | 79 CallStub(&store_buffer_overflow); |
| 80 bind(&no_overflow); | 80 bind(&no_overflow); |
| 81 } | 81 } |
| 82 | 82 |
| 83 | 83 |
| 84 void MacroAssembler::RecordWrite(Register object, | 84 void MacroAssembler::RecordWrite(Register object, |
| 85 int offset, | 85 int offset, |
| 86 Register value, | 86 Register value, |
| 87 Register scratch, | 87 Register scratch, |
| 88 SaveFPRegsMode save_fp) { | 88 SaveFPRegsMode save_fp) { |
| 89 // The compiled code assumes that record write doesn't change the | 89 // The compiled code assumes that record write doesn't change the |
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| 1911 | 1911 |
| 1912 // Check that the code was patched as expected. | 1912 // Check that the code was patched as expected. |
| 1913 ASSERT(masm_.pc_ == address_ + size_); | 1913 ASSERT(masm_.pc_ == address_ + size_); |
| 1914 ASSERT(masm_.reloc_info_writer.pos() == address_ + size_ + Assembler::kGap); | 1914 ASSERT(masm_.reloc_info_writer.pos() == address_ + size_ + Assembler::kGap); |
| 1915 } | 1915 } |
| 1916 | 1916 |
| 1917 | 1917 |
| 1918 } } // namespace v8::internal | 1918 } } // namespace v8::internal |
| 1919 | 1919 |
| 1920 #endif // V8_TARGET_ARCH_IA32 | 1920 #endif // V8_TARGET_ARCH_IA32 |
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