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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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| 62 const intptr_t kCodeAlignment = 1 << kCodeAlignmentBits; | 62 const intptr_t kCodeAlignment = 1 << kCodeAlignmentBits; |
| 63 const intptr_t kCodeAlignmentMask = kCodeAlignment - 1; | 63 const intptr_t kCodeAlignmentMask = kCodeAlignment - 1; |
| 64 | 64 |
| 65 // Tag information for Failure. | 65 // Tag information for Failure. |
| 66 const int kFailureTag = 3; | 66 const int kFailureTag = 3; |
| 67 const int kFailureTagSize = 2; | 67 const int kFailureTagSize = 2; |
| 68 const intptr_t kFailureTagMask = (1 << kFailureTagSize) - 1; | 68 const intptr_t kFailureTagMask = (1 << kFailureTagSize) - 1; |
| 69 | 69 |
| 70 | 70 |
| 71 // Zap-value: The value used for zapping dead objects. | 71 // Zap-value: The value used for zapping dead objects. |
| 72 // Should be a recognizable hex value tagged as a heap object pointer. | 72 // Should be a recognizable hex value tagged as a failure. |
| 73 #ifdef V8_HOST_ARCH_64_BIT | 73 #ifdef V8_HOST_ARCH_64_BIT |
| 74 const Address kZapValue = | 74 const Address kZapValue = |
| 75 reinterpret_cast<Address>(V8_UINT64_C(0xdeadbeedbeadbeed)); | 75 reinterpret_cast<Address>(V8_UINT64_C(0xdeadbeedbeadbeef)); |
| 76 const Address kHandleZapValue = | 76 const Address kHandleZapValue = |
| 77 reinterpret_cast<Address>(V8_UINT64_C(0x1baddead0baddead)); | 77 reinterpret_cast<Address>(V8_UINT64_C(0x1baddead0baddeaf)); |
| 78 const Address kFromSpaceZapValue = | 78 const Address kFromSpaceZapValue = |
| 79 reinterpret_cast<Address>(V8_UINT64_C(0x1beefdad0beefdad)); | 79 reinterpret_cast<Address>(V8_UINT64_C(0x1beefdad0beefdaf)); |
| 80 const uint64_t kDebugZapValue = V8_UINT64_C(0xbadbaddbbadbaddb); | 80 const uint64_t kDebugZapValue = V8_UINT64_C(0xbadbaddbbadbaddb); |
| 81 const uint64_t kSlotsZapValue = V8_UINT64_C(0xbeefdeadbeefdeed); | 81 const uint64_t kSlotsZapValue = V8_UINT64_C(0xbeefdeadbeefdeef); |
| 82 #else | 82 #else |
| 83 const Address kZapValue = reinterpret_cast<Address>(0xdeadbeed); | 83 const Address kZapValue = reinterpret_cast<Address>(0xdeadbeef); |
| 84 const Address kHandleZapValue = reinterpret_cast<Address>(0xbaddead); | 84 const Address kHandleZapValue = reinterpret_cast<Address>(0xbaddeaf); |
| 85 const Address kFromSpaceZapValue = reinterpret_cast<Address>(0xbeefdad); | 85 const Address kFromSpaceZapValue = reinterpret_cast<Address>(0xbeefdaf); |
| 86 const uint32_t kSlotsZapValue = 0xbeefdeed; | 86 const uint32_t kSlotsZapValue = 0xbeefdeef; |
| 87 const uint32_t kDebugZapValue = 0xbadbaddb; | 87 const uint32_t kDebugZapValue = 0xbadbaddb; |
| 88 #endif | 88 #endif |
| 89 | 89 |
| 90 | 90 |
| 91 // Number of bits to represent the page size for paged spaces. The value of 13 | 91 // Number of bits to represent the page size for paged spaces. The value of 13 |
| 92 // gives 8K bytes per page. | 92 // gives 8K bytes per page. |
| 93 const int kPageSizeBits = 13; | 93 const int kPageSizeBits = 13; |
| 94 | 94 |
| 95 // On Intel architecture, cache line size is 64 bytes. | 95 // On Intel architecture, cache line size is 64 bytes. |
| 96 // On ARM it may be less (32 bytes), but as far this constant is | 96 // On ARM it may be less (32 bytes), but as far this constant is |
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| 471 | 471 |
| 472 // The Strict Mode (ECMA-262 5th edition, 4.2.2). | 472 // The Strict Mode (ECMA-262 5th edition, 4.2.2). |
| 473 enum StrictModeFlag { | 473 enum StrictModeFlag { |
| 474 kNonStrictMode, | 474 kNonStrictMode, |
| 475 kStrictMode | 475 kStrictMode |
| 476 }; | 476 }; |
| 477 | 477 |
| 478 } } // namespace v8::internal | 478 } } // namespace v8::internal |
| 479 | 479 |
| 480 #endif // V8_V8GLOBALS_H_ | 480 #endif // V8_V8GLOBALS_H_ |
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