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1 // Copyright 2011 the V8 project authors. All rights reserved. | 1 // Copyright 2011 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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93 // is no special garbage section. | 93 // is no special garbage section. |
94 | 94 |
95 // Some assertion macros used in the debugging mode. | 95 // Some assertion macros used in the debugging mode. |
96 | 96 |
97 #define ASSERT_PAGE_ALIGNED(address) \ | 97 #define ASSERT_PAGE_ALIGNED(address) \ |
98 ASSERT((OffsetFrom(address) & Page::kPageAlignmentMask) == 0) | 98 ASSERT((OffsetFrom(address) & Page::kPageAlignmentMask) == 0) |
99 | 99 |
100 #define ASSERT_OBJECT_ALIGNED(address) \ | 100 #define ASSERT_OBJECT_ALIGNED(address) \ |
101 ASSERT((OffsetFrom(address) & kObjectAlignmentMask) == 0) | 101 ASSERT((OffsetFrom(address) & kObjectAlignmentMask) == 0) |
102 | 102 |
103 #define ASSERT_MAP_ALIGNED(address) \ | |
104 ASSERT((OffsetFrom(address) & kMapAlignmentMask) == 0) | |
105 | |
106 #define ASSERT_OBJECT_SIZE(size) \ | 103 #define ASSERT_OBJECT_SIZE(size) \ |
107 ASSERT((0 < size) && (size <= Page::kMaxNonCodeHeapObjectSize)) | 104 ASSERT((0 < size) && (size <= Page::kMaxNonCodeHeapObjectSize)) |
108 | 105 |
109 #define ASSERT_PAGE_OFFSET(offset) \ | 106 #define ASSERT_PAGE_OFFSET(offset) \ |
110 ASSERT((Page::kObjectStartOffset <= offset) \ | 107 ASSERT((Page::kObjectStartOffset <= offset) \ |
111 && (offset <= Page::kPageSize)) | 108 && (offset <= Page::kPageSize)) |
112 | 109 |
113 #define ASSERT_MAP_PAGE_INDEX(index) \ | 110 #define ASSERT_MAP_PAGE_INDEX(index) \ |
114 ASSERT((0 <= index) && (index <= MapSpace::kMaxMapPageIndex)) | 111 ASSERT((0 <= index) && (index <= MapSpace::kMaxMapPageIndex)) |
115 | 112 |
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503 kPointerSize + kPointerSize + kPointerSize + kIntSize; | 500 kPointerSize + kPointerSize + kPointerSize + kIntSize; |
504 | 501 |
505 static const size_t kSlotsBufferOffset = kLiveBytesOffset + kIntSize; | 502 static const size_t kSlotsBufferOffset = kLiveBytesOffset + kIntSize; |
506 | 503 |
507 static const size_t kWriteBarrierCounterOffset = | 504 static const size_t kWriteBarrierCounterOffset = |
508 kSlotsBufferOffset + kPointerSize + kPointerSize; | 505 kSlotsBufferOffset + kPointerSize + kPointerSize; |
509 | 506 |
510 static const size_t kHeaderSize = kWriteBarrierCounterOffset + kPointerSize; | 507 static const size_t kHeaderSize = kWriteBarrierCounterOffset + kPointerSize; |
511 | 508 |
512 static const int kBodyOffset = | 509 static const int kBodyOffset = |
513 CODE_POINTER_ALIGN(MAP_POINTER_ALIGN(kHeaderSize + Bitmap::kSize)); | 510 CODE_POINTER_ALIGN(kHeaderSize + Bitmap::kSize); |
514 | 511 |
515 // The start offset of the object area in a page. Aligned to both maps and | 512 // The start offset of the object area in a page. Aligned to both maps and |
516 // code alignment to be suitable for both. Also aligned to 32 words because | 513 // code alignment to be suitable for both. Also aligned to 32 words because |
517 // the marking bitmap is arranged in 32 bit chunks. | 514 // the marking bitmap is arranged in 32 bit chunks. |
518 static const int kObjectStartAlignment = 32 * kPointerSize; | 515 static const int kObjectStartAlignment = 32 * kPointerSize; |
519 static const int kObjectStartOffset = kBodyOffset - 1 + | 516 static const int kObjectStartOffset = kBodyOffset - 1 + |
520 (kObjectStartAlignment - (kBodyOffset - 1) % kObjectStartAlignment); | 517 (kObjectStartAlignment - (kBodyOffset - 1) % kObjectStartAlignment); |
521 | 518 |
522 size_t size() const { return size_; } | 519 size_t size() const { return size_; } |
523 | 520 |
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2675 } | 2672 } |
2676 // Must be small, since an iteration is used for lookup. | 2673 // Must be small, since an iteration is used for lookup. |
2677 static const int kMaxComments = 64; | 2674 static const int kMaxComments = 64; |
2678 }; | 2675 }; |
2679 #endif | 2676 #endif |
2680 | 2677 |
2681 | 2678 |
2682 } } // namespace v8::internal | 2679 } } // namespace v8::internal |
2683 | 2680 |
2684 #endif // V8_SPACES_H_ | 2681 #endif // V8_SPACES_H_ |
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