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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 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #ifndef V8_SERIALIZE_H_ | 5 #ifndef V8_SERIALIZE_H_ |
6 #define V8_SERIALIZE_H_ | 6 #define V8_SERIALIZE_H_ |
7 | 7 |
8 #include "src/compiler.h" | 8 #include "src/compiler.h" |
9 #include "src/hashmap.h" | 9 #include "src/hashmap.h" |
10 #include "src/heap-profiler.h" | 10 #include "src/heap-profiler.h" |
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494 | 494 |
495 ~SerializedData() { | 495 ~SerializedData() { |
496 if (owns_data_) DeleteArray<byte>(data_); | 496 if (owns_data_) DeleteArray<byte>(data_); |
497 } | 497 } |
498 | 498 |
499 class ChunkSizeBits : public BitField<uint32_t, 0, 31> {}; | 499 class ChunkSizeBits : public BitField<uint32_t, 0, 31> {}; |
500 class IsLastChunkBits : public BitField<bool, 31, 1> {}; | 500 class IsLastChunkBits : public BitField<bool, 31, 1> {}; |
501 | 501 |
502 protected: | 502 protected: |
503 void SetHeaderValue(int offset, uint32_t value) { | 503 void SetHeaderValue(int offset, uint32_t value) { |
504 memcpy(reinterpret_cast<uint32_t*>(data_) + offset, &value, sizeof(value)); | 504 uint32_t* address = reinterpret_cast<uint32_t*>(data_ + offset); |
| 505 memcpy(reinterpret_cast<uint32_t*>(address), &value, sizeof(value)); |
505 } | 506 } |
506 | 507 |
507 uint32_t GetHeaderValue(int offset) const { | 508 uint32_t GetHeaderValue(int offset) const { |
508 uint32_t value; | 509 uint32_t value; |
509 memcpy(&value, reinterpret_cast<int*>(data_) + offset, sizeof(value)); | 510 memcpy(&value, reinterpret_cast<int*>(data_ + offset), sizeof(value)); |
510 return value; | 511 return value; |
511 } | 512 } |
512 | 513 |
513 void AllocateData(int size); | 514 void AllocateData(int size); |
514 | 515 |
515 byte* data_; | 516 byte* data_; |
516 int size_; | 517 int size_; |
517 bool owns_data_; | 518 bool owns_data_; |
518 }; | 519 }; |
519 | 520 |
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905 | 906 |
906 Vector<const Reservation> Reservations() const; | 907 Vector<const Reservation> Reservations() const; |
907 Vector<const byte> Payload() const; | 908 Vector<const byte> Payload() const; |
908 | 909 |
909 Vector<const byte> RawData() const { | 910 Vector<const byte> RawData() const { |
910 return Vector<const byte>(data_, size_); | 911 return Vector<const byte>(data_, size_); |
911 } | 912 } |
912 | 913 |
913 private: | 914 private: |
914 bool IsSane(); | 915 bool IsSane(); |
915 // The data header consists of int-sized entries: | 916 // The data header consists of uint32_t-sized entries: |
916 // [0] version hash | 917 // [0] version hash |
917 // [1] number of reservation size entries | 918 // [1] number of reservation size entries |
918 // [2] payload length | 919 // [2] payload length |
| 920 // ... reservations |
| 921 // ... serialized payload |
919 static const int kCheckSumOffset = 0; | 922 static const int kCheckSumOffset = 0; |
920 static const int kReservationsOffset = 1; | 923 static const int kNumReservationsOffset = kCheckSumOffset + kInt32Size; |
921 static const int kPayloadLengthOffset = 2; | 924 static const int kPayloadLengthOffset = kNumReservationsOffset + kInt32Size; |
922 static const int kHeaderSize = (kPayloadLengthOffset + 1) * kIntSize; | 925 static const int kHeaderSize = kPayloadLengthOffset + kInt32Size; |
923 }; | 926 }; |
924 | 927 |
925 | 928 |
926 // Wrapper around ScriptData to provide code-serializer-specific functionality. | 929 // Wrapper around ScriptData to provide code-serializer-specific functionality. |
927 class SerializedCodeData : public SerializedData { | 930 class SerializedCodeData : public SerializedData { |
928 public: | 931 public: |
929 // Used when consuming. | 932 // Used when consuming. |
930 static SerializedCodeData* FromCachedData(ScriptData* cached_data, | 933 static SerializedCodeData* FromCachedData(ScriptData* cached_data, |
931 String* source) { | 934 String* source) { |
932 DisallowHeapAllocation no_gc; | 935 DisallowHeapAllocation no_gc; |
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950 Vector<const uint32_t> CodeStubKeys() const; | 953 Vector<const uint32_t> CodeStubKeys() const; |
951 | 954 |
952 private: | 955 private: |
953 explicit SerializedCodeData(ScriptData* data) | 956 explicit SerializedCodeData(ScriptData* data) |
954 : SerializedData(const_cast<byte*>(data->data()), data->length()) {} | 957 : SerializedData(const_cast<byte*>(data->data()), data->length()) {} |
955 | 958 |
956 bool IsSane(String* source) const; | 959 bool IsSane(String* source) const; |
957 | 960 |
958 uint32_t SourceHash(String* source) const { return source->length(); } | 961 uint32_t SourceHash(String* source) const { return source->length(); } |
959 | 962 |
960 // The data header consists of int-sized entries: | 963 // The data header consists of uint32_t-sized entries: |
961 // [0] version hash | 964 // [0] version hash |
962 // [1] source hash | 965 // [1] source hash |
963 // [2] cpu features | 966 // [2] cpu features |
964 // [3] flag hash | 967 // [3] flag hash |
965 // [4] number of internalized strings | 968 // [4] number of internalized strings |
966 // [5] number of code stub keys | 969 // [5] number of code stub keys |
967 // [6] number of reservation size entries | 970 // [6] number of reservation size entries |
968 // [7] payload length | 971 // [7] payload length |
| 972 // [8] payload checksum part 1 |
| 973 // [9] payload checksum part 2 |
| 974 // ... reservations |
| 975 // ... code stub keys |
| 976 // ... serialized payload |
969 static const int kVersionHashOffset = 0; | 977 static const int kVersionHashOffset = 0; |
970 static const int kSourceHashOffset = 1; | 978 static const int kSourceHashOffset = kVersionHashOffset + kInt32Size; |
971 static const int kCpuFeaturesOffset = 2; | 979 static const int kCpuFeaturesOffset = kSourceHashOffset + kInt32Size; |
972 static const int kFlagHashOffset = 3; | 980 static const int kFlagHashOffset = kCpuFeaturesOffset + kInt32Size; |
973 static const int kNumInternalizedStringsOffset = 4; | 981 static const int kNumInternalizedStringsOffset = kFlagHashOffset + kInt32Size; |
974 static const int kReservationsOffset = 5; | 982 static const int kNumReservationsOffset = |
975 static const int kNumCodeStubKeysOffset = 6; | 983 kNumInternalizedStringsOffset + kInt32Size; |
976 static const int kPayloadLengthOffset = 7; | 984 static const int kNumCodeStubKeysOffset = kNumReservationsOffset + kInt32Size; |
977 static const int kChecksum1Offset = 8; | 985 static const int kPayloadLengthOffset = kNumCodeStubKeysOffset + kInt32Size; |
978 static const int kChecksum2Offset = 9; | 986 static const int kChecksum1Offset = kPayloadLengthOffset + kInt32Size; |
979 static const int kHeaderSize = | 987 static const int kChecksum2Offset = kChecksum1Offset + kInt32Size; |
980 POINTER_SIZE_ALIGN((kChecksum2Offset + 1) * kIntSize); | 988 static const int kHeaderSize = kChecksum2Offset + kInt32Size; |
981 }; | 989 }; |
982 } } // namespace v8::internal | 990 } } // namespace v8::internal |
983 | 991 |
984 #endif // V8_SERIALIZE_H_ | 992 #endif // V8_SERIALIZE_H_ |
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