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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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| 611 // The sequence of instructions that is patched out for aging code is the | 611 // The sequence of instructions that is patched out for aging code is the |
| 612 // following boilerplate stack-building prologue that is found in FUNCTIONS | 612 // following boilerplate stack-building prologue that is found in FUNCTIONS |
| 613 static bool initialized = false; | 613 static bool initialized = false; |
| 614 static uint32_t sequence[kNoCodeAgeSequenceLength]; | 614 static uint32_t sequence[kNoCodeAgeSequenceLength]; |
| 615 byte* byte_sequence = reinterpret_cast<byte*>(sequence); | 615 byte* byte_sequence = reinterpret_cast<byte*>(sequence); |
| 616 *length = kNoCodeAgeSequenceLength * Assembler::kInstrSize; | 616 *length = kNoCodeAgeSequenceLength * Assembler::kInstrSize; |
| 617 if (!initialized) { | 617 if (!initialized) { |
| 618 CodePatcher patcher(byte_sequence, kNoCodeAgeSequenceLength); | 618 CodePatcher patcher(byte_sequence, kNoCodeAgeSequenceLength); |
| 619 patcher.masm()->Push(ra, fp, cp, a1); | 619 patcher.masm()->Push(ra, fp, cp, a1); |
| 620 patcher.masm()->nop(Assembler::CODE_AGE_SEQUENCE_NOP); | 620 patcher.masm()->nop(Assembler::CODE_AGE_SEQUENCE_NOP); |
| 621 patcher.masm()->Addu(fp, sp, Operand(2 * kPointerSize)); | 621 patcher.masm()->Addu(fp, sp, |
| 622 Operand(StandardFrameConstants::kFixedFrameSizeFromFp)); |
| 622 initialized = true; | 623 initialized = true; |
| 623 } | 624 } |
| 624 return byte_sequence; | 625 return byte_sequence; |
| 625 } | 626 } |
| 626 | 627 |
| 627 | 628 |
| 628 bool Code::IsYoungSequence(byte* sequence) { | 629 bool Code::IsYoungSequence(byte* sequence) { |
| 629 uint32_t young_length; | 630 uint32_t young_length; |
| 630 byte* young_sequence = GetNoCodeAgeSequence(&young_length); | 631 byte* young_sequence = GetNoCodeAgeSequence(&young_length); |
| 631 bool result = !memcmp(sequence, young_sequence, young_length); | 632 bool result = !memcmp(sequence, young_sequence, young_length); |
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| 674 patcher.masm()->emit_code_stub_address(stub); | 675 patcher.masm()->emit_code_stub_address(stub); |
| 675 } | 676 } |
| 676 } | 677 } |
| 677 | 678 |
| 678 | 679 |
| 679 #undef __ | 680 #undef __ |
| 680 | 681 |
| 681 } } // namespace v8::internal | 682 } } // namespace v8::internal |
| 682 | 683 |
| 683 #endif // V8_TARGET_ARCH_MIPS | 684 #endif // V8_TARGET_ARCH_MIPS |
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