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1 // Copyright 2006-2008 the V8 project authors. All rights reserved. | 1 // Copyright 2006-2008 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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837 bool Failure::IsInternalError() const { | 837 bool Failure::IsInternalError() const { |
838 return type() == INTERNAL_ERROR; | 838 return type() == INTERNAL_ERROR; |
839 } | 839 } |
840 | 840 |
841 | 841 |
842 bool Failure::IsOutOfMemoryException() const { | 842 bool Failure::IsOutOfMemoryException() const { |
843 return type() == OUT_OF_MEMORY_EXCEPTION; | 843 return type() == OUT_OF_MEMORY_EXCEPTION; |
844 } | 844 } |
845 | 845 |
846 | 846 |
847 int Failure::requested() const { | |
848 const int kShiftBits = | |
849 kFailureTypeTagSize + kSpaceTagSize - kObjectAlignmentBits; | |
850 STATIC_ASSERT(kShiftBits >= 0); | |
851 ASSERT(type() == RETRY_AFTER_GC); | |
852 return static_cast<int>(value() >> kShiftBits); | |
853 } | |
854 | |
855 | |
856 AllocationSpace Failure::allocation_space() const { | 847 AllocationSpace Failure::allocation_space() const { |
857 ASSERT_EQ(RETRY_AFTER_GC, type()); | 848 ASSERT_EQ(RETRY_AFTER_GC, type()); |
858 return static_cast<AllocationSpace>((value() >> kFailureTypeTagSize) | 849 return static_cast<AllocationSpace>((value() >> kFailureTypeTagSize) |
859 & kSpaceTagMask); | 850 & kSpaceTagMask); |
860 } | 851 } |
861 | 852 |
862 | 853 |
863 Failure* Failure::InternalError() { | 854 Failure* Failure::InternalError() { |
864 return Construct(INTERNAL_ERROR); | 855 return Construct(INTERNAL_ERROR); |
865 } | 856 } |
866 | 857 |
867 | 858 |
868 Failure* Failure::Exception() { | 859 Failure* Failure::Exception() { |
869 return Construct(EXCEPTION); | 860 return Construct(EXCEPTION); |
870 } | 861 } |
871 | 862 |
872 | 863 |
873 Failure* Failure::OutOfMemoryException() { | 864 Failure* Failure::OutOfMemoryException() { |
874 return Construct(OUT_OF_MEMORY_EXCEPTION); | 865 return Construct(OUT_OF_MEMORY_EXCEPTION); |
875 } | 866 } |
876 | 867 |
877 | 868 |
878 intptr_t Failure::value() const { | 869 intptr_t Failure::value() const { |
879 return static_cast<intptr_t>( | 870 return static_cast<intptr_t>( |
880 reinterpret_cast<uintptr_t>(this) >> kFailureTagSize); | 871 reinterpret_cast<uintptr_t>(this) >> kFailureTagSize); |
881 } | 872 } |
882 | 873 |
883 | 874 |
884 Failure* Failure::RetryAfterGC(int requested_bytes) { | 875 Failure* Failure::RetryAfterGC() { |
885 // Assert that the space encoding fits in the three bytes allotted for it. | 876 return RetryAfterGC(NEW_SPACE); |
886 ASSERT((LAST_SPACE & ~kSpaceTagMask) == 0); | |
887 uintptr_t requested = | |
888 static_cast<uintptr_t>(requested_bytes >> kObjectAlignmentBits); | |
889 int tag_bits = kSpaceTagSize + kFailureTypeTagSize + kFailureTagSize; | |
890 if (((requested << tag_bits) >> tag_bits) != requested) { | |
891 // No room for entire requested size in the bits. Round down to | |
892 // maximally representable size. | |
893 requested = static_cast<intptr_t>( | |
894 (~static_cast<uintptr_t>(0)) >> (tag_bits + 1)); | |
895 } | |
896 int value = static_cast<int>(requested << kSpaceTagSize) | NEW_SPACE; | |
897 return Construct(RETRY_AFTER_GC, value); | |
898 } | 877 } |
899 | 878 |
900 | 879 |
| 880 Failure* Failure::RetryAfterGC(AllocationSpace space) { |
| 881 ASSERT((space & ~kSpaceTagMask) == 0); |
| 882 return Construct(RETRY_AFTER_GC, space); |
| 883 } |
| 884 |
| 885 |
901 Failure* Failure::Construct(Type type, intptr_t value) { | 886 Failure* Failure::Construct(Type type, intptr_t value) { |
902 uintptr_t info = | 887 uintptr_t info = |
903 (static_cast<uintptr_t>(value) << kFailureTypeTagSize) | type; | 888 (static_cast<uintptr_t>(value) << kFailureTypeTagSize) | type; |
904 ASSERT(((info << kFailureTagSize) >> kFailureTagSize) == info); | 889 ASSERT(((info << kFailureTagSize) >> kFailureTagSize) == info); |
905 return reinterpret_cast<Failure*>((info << kFailureTagSize) | kFailureTag); | 890 return reinterpret_cast<Failure*>((info << kFailureTagSize) | kFailureTag); |
906 } | 891 } |
907 | 892 |
908 | 893 |
909 bool Smi::IsValid(intptr_t value) { | 894 bool Smi::IsValid(intptr_t value) { |
910 #ifdef DEBUG | 895 #ifdef DEBUG |
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3550 #undef WRITE_INT_FIELD | 3535 #undef WRITE_INT_FIELD |
3551 #undef READ_SHORT_FIELD | 3536 #undef READ_SHORT_FIELD |
3552 #undef WRITE_SHORT_FIELD | 3537 #undef WRITE_SHORT_FIELD |
3553 #undef READ_BYTE_FIELD | 3538 #undef READ_BYTE_FIELD |
3554 #undef WRITE_BYTE_FIELD | 3539 #undef WRITE_BYTE_FIELD |
3555 | 3540 |
3556 | 3541 |
3557 } } // namespace v8::internal | 3542 } } // namespace v8::internal |
3558 | 3543 |
3559 #endif // V8_OBJECTS_INL_H_ | 3544 #endif // V8_OBJECTS_INL_H_ |
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