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Issue 199973004: Continued fix for 351257. Reusing the feedback vector is too complex. (Closed) Base URL: https://v8.googlecode.com/svn/branches/bleeding_edge
Patch Set: REBASE. Created 6 years, 9 months ago
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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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5490 5490
5491 template<typename StaticVisitor> 5491 template<typename StaticVisitor>
5492 inline void CodeIterateBody(Heap* heap); 5492 inline void CodeIterateBody(Heap* heap);
5493 5493
5494 DECLARE_PRINTER(Code) 5494 DECLARE_PRINTER(Code)
5495 DECLARE_VERIFIER(Code) 5495 DECLARE_VERIFIER(Code)
5496 5496
5497 void ClearInlineCaches(); 5497 void ClearInlineCaches();
5498 void ClearInlineCaches(Kind kind); 5498 void ClearInlineCaches(Kind kind);
5499 5499
5500 void ClearTypeFeedbackInfo(Heap* heap);
5501
5502 BailoutId TranslatePcOffsetToAstId(uint32_t pc_offset); 5500 BailoutId TranslatePcOffsetToAstId(uint32_t pc_offset);
5503 uint32_t TranslateAstIdToPcOffset(BailoutId ast_id); 5501 uint32_t TranslateAstIdToPcOffset(BailoutId ast_id);
5504 5502
5505 #define DECLARE_CODE_AGE_ENUM(X) k##X##CodeAge, 5503 #define DECLARE_CODE_AGE_ENUM(X) k##X##CodeAge,
5506 enum Age { 5504 enum Age {
5507 kNotExecutedCodeAge = -2, 5505 kNotExecutedCodeAge = -2,
5508 kExecutedOnceCodeAge = -1, 5506 kExecutedOnceCodeAge = -1,
5509 kNoAgeCodeAge = 0, 5507 kNoAgeCodeAge = 0,
5510 CODE_AGE_LIST(DECLARE_CODE_AGE_ENUM) 5508 CODE_AGE_LIST(DECLARE_CODE_AGE_ENUM)
5511 kAfterLastCodeAge, 5509 kAfterLastCodeAge,
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6687 FixedArray* GetLiteralsFromOptimizedCodeMap(int index); 6685 FixedArray* GetLiteralsFromOptimizedCodeMap(int index);
6688 6686
6689 Code* GetCodeFromOptimizedCodeMap(int index); 6687 Code* GetCodeFromOptimizedCodeMap(int index);
6690 6688
6691 // Clear optimized code map. 6689 // Clear optimized code map.
6692 void ClearOptimizedCodeMap(); 6690 void ClearOptimizedCodeMap();
6693 6691
6694 // Removed a specific optimized code object from the optimized code map. 6692 // Removed a specific optimized code object from the optimized code map.
6695 void EvictFromOptimizedCodeMap(Code* optimized_code, const char* reason); 6693 void EvictFromOptimizedCodeMap(Code* optimized_code, const char* reason);
6696 6694
6695 void ClearTypeFeedbackInfo(Heap* heap);
6696
6697 // Trims the optimized code map after entries have been removed. 6697 // Trims the optimized code map after entries have been removed.
6698 void TrimOptimizedCodeMap(int shrink_by); 6698 void TrimOptimizedCodeMap(int shrink_by);
6699 6699
6700 // Add a new entry to the optimized code map. 6700 // Add a new entry to the optimized code map.
6701 MUST_USE_RESULT MaybeObject* AddToOptimizedCodeMap(Context* native_context, 6701 MUST_USE_RESULT MaybeObject* AddToOptimizedCodeMap(Context* native_context,
6702 Code* code, 6702 Code* code,
6703 FixedArray* literals, 6703 FixedArray* literals,
6704 BailoutId osr_ast_id); 6704 BailoutId osr_ast_id);
6705 static void AddToOptimizedCodeMap(Handle<SharedFunctionInfo> shared, 6705 static void AddToOptimizedCodeMap(Handle<SharedFunctionInfo> shared,
6706 Handle<Context> native_context, 6706 Handle<Context> native_context,
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6795 // Important: inobject slack tracking is not attempted during the snapshot 6795 // Important: inobject slack tracking is not attempted during the snapshot
6796 // creation. 6796 // creation.
6797 6797
6798 static const int kGenerousAllocationCount = 8; 6798 static const int kGenerousAllocationCount = 8;
6799 6799
6800 // [construction_count]: Counter for constructor calls made during 6800 // [construction_count]: Counter for constructor calls made during
6801 // the tracking phase. 6801 // the tracking phase.
6802 inline int construction_count(); 6802 inline int construction_count();
6803 inline void set_construction_count(int value); 6803 inline void set_construction_count(int value);
6804 6804
6805 // [feedback_vector] - accumulates ast node feedback from full-codegen and
6806 // (increasingly) from crankshafted code where sufficient feedback isn't
6807 // available. Currently the field is duplicated in
6808 // TypeFeedbackInfo::feedback_vector, but the allocation is done here.
6809 DECL_ACCESSORS(feedback_vector, FixedArray)
6810
6805 // [initial_map]: initial map of the first function called as a constructor. 6811 // [initial_map]: initial map of the first function called as a constructor.
6806 // Saved for the duration of the tracking phase. 6812 // Saved for the duration of the tracking phase.
6807 // This is a weak link (GC resets it to undefined_value if no other live 6813 // This is a weak link (GC resets it to undefined_value if no other live
6808 // object reference this map). 6814 // object reference this map).
6809 DECL_ACCESSORS(initial_map, Object) 6815 DECL_ACCESSORS(initial_map, Object)
6810 6816
6811 // True if the initial_map is not undefined and the countdown stub is 6817 // True if the initial_map is not undefined and the countdown stub is
6812 // installed. 6818 // installed.
6813 inline bool IsInobjectSlackTrackingInProgress(); 6819 inline bool IsInobjectSlackTrackingInProgress();
6814 6820
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7075 static const int kOptimizedCodeMapOffset = kCodeOffset + kPointerSize; 7081 static const int kOptimizedCodeMapOffset = kCodeOffset + kPointerSize;
7076 static const int kScopeInfoOffset = kOptimizedCodeMapOffset + kPointerSize; 7082 static const int kScopeInfoOffset = kOptimizedCodeMapOffset + kPointerSize;
7077 static const int kConstructStubOffset = kScopeInfoOffset + kPointerSize; 7083 static const int kConstructStubOffset = kScopeInfoOffset + kPointerSize;
7078 static const int kInstanceClassNameOffset = 7084 static const int kInstanceClassNameOffset =
7079 kConstructStubOffset + kPointerSize; 7085 kConstructStubOffset + kPointerSize;
7080 static const int kFunctionDataOffset = 7086 static const int kFunctionDataOffset =
7081 kInstanceClassNameOffset + kPointerSize; 7087 kInstanceClassNameOffset + kPointerSize;
7082 static const int kScriptOffset = kFunctionDataOffset + kPointerSize; 7088 static const int kScriptOffset = kFunctionDataOffset + kPointerSize;
7083 static const int kDebugInfoOffset = kScriptOffset + kPointerSize; 7089 static const int kDebugInfoOffset = kScriptOffset + kPointerSize;
7084 static const int kInferredNameOffset = kDebugInfoOffset + kPointerSize; 7090 static const int kInferredNameOffset = kDebugInfoOffset + kPointerSize;
7091 static const int kFeedbackVectorOffset =
7092 kInferredNameOffset + kPointerSize;
7085 static const int kInitialMapOffset = 7093 static const int kInitialMapOffset =
7086 kInferredNameOffset + kPointerSize; 7094 kFeedbackVectorOffset + kPointerSize;
7087 // ast_node_count is a Smi field. It could be grouped with another Smi field 7095 // ast_node_count is a Smi field. It could be grouped with another Smi field
7088 // into a PSEUDO_SMI_ACCESSORS pair (on x64), if one becomes available. 7096 // into a PSEUDO_SMI_ACCESSORS pair (on x64), if one becomes available.
7089 static const int kAstNodeCountOffset = 7097 static const int kAstNodeCountOffset =
7090 kInitialMapOffset + kPointerSize; 7098 kInitialMapOffset + kPointerSize;
7091 #if V8_HOST_ARCH_32_BIT 7099 #if V8_HOST_ARCH_32_BIT
7092 // Smi fields. 7100 // Smi fields.
7093 static const int kLengthOffset = 7101 static const int kLengthOffset =
7094 kAstNodeCountOffset + kPointerSize; 7102 kAstNodeCountOffset + kPointerSize;
7095 static const int kFormalParameterCountOffset = kLengthOffset + kPointerSize; 7103 static const int kFormalParameterCountOffset = kLengthOffset + kPointerSize;
7096 static const int kExpectedNofPropertiesOffset = 7104 static const int kExpectedNofPropertiesOffset =
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8162 inline void change_ic_with_type_info_count(int count); 8170 inline void change_ic_with_type_info_count(int count);
8163 8171
8164 inline void initialize_storage(); 8172 inline void initialize_storage();
8165 8173
8166 inline void change_own_type_change_checksum(); 8174 inline void change_own_type_change_checksum();
8167 inline int own_type_change_checksum(); 8175 inline int own_type_change_checksum();
8168 8176
8169 inline void set_inlined_type_change_checksum(int checksum); 8177 inline void set_inlined_type_change_checksum(int checksum);
8170 inline bool matches_inlined_type_change_checksum(int checksum); 8178 inline bool matches_inlined_type_change_checksum(int checksum);
8171 8179
8172 DECL_ACCESSORS(feedback_vector, FixedArray)
8173
8174 static inline TypeFeedbackInfo* cast(Object* obj); 8180 static inline TypeFeedbackInfo* cast(Object* obj);
8175 8181
8176 // Dispatched behavior. 8182 // Dispatched behavior.
8177 DECLARE_PRINTER(TypeFeedbackInfo) 8183 DECLARE_PRINTER(TypeFeedbackInfo)
8178 DECLARE_VERIFIER(TypeFeedbackInfo) 8184 DECLARE_VERIFIER(TypeFeedbackInfo)
8179 8185
8180 static const int kStorage1Offset = HeapObject::kHeaderSize; 8186 static const int kStorage1Offset = HeapObject::kHeaderSize;
8181 static const int kStorage2Offset = kStorage1Offset + kPointerSize; 8187 static const int kStorage2Offset = kStorage1Offset + kPointerSize;
8182 static const int kFeedbackVectorOffset = 8188 static const int kSize = kStorage2Offset + kPointerSize;
8183 kStorage2Offset + kPointerSize;
8184 static const int kSize = kFeedbackVectorOffset + kPointerSize;
8185 8189
8190 // TODO(mvstanton): move these sentinel declarations to shared function info.
8186 // The object that indicates an uninitialized cache. 8191 // The object that indicates an uninitialized cache.
8187 static inline Handle<Object> UninitializedSentinel(Isolate* isolate); 8192 static inline Handle<Object> UninitializedSentinel(Isolate* isolate);
8188 8193
8189 // The object that indicates a megamorphic state. 8194 // The object that indicates a megamorphic state.
8190 static inline Handle<Object> MegamorphicSentinel(Isolate* isolate); 8195 static inline Handle<Object> MegamorphicSentinel(Isolate* isolate);
8191 8196
8192 // The object that indicates a monomorphic state of Array with 8197 // The object that indicates a monomorphic state of Array with
8193 // ElementsKind 8198 // ElementsKind
8194 static inline Handle<Object> MonomorphicArraySentinel(Isolate* isolate, 8199 static inline Handle<Object> MonomorphicArraySentinel(Isolate* isolate,
8195 ElementsKind elements_kind); 8200 ElementsKind elements_kind);
8196 8201
8197 // A raw version of the uninitialized sentinel that's safe to read during 8202 // A raw version of the uninitialized sentinel that's safe to read during
8198 // garbage collection (e.g., for patching the cache). 8203 // garbage collection (e.g., for patching the cache).
8199 static inline Object* RawUninitializedSentinel(Heap* heap); 8204 static inline Object* RawUninitializedSentinel(Heap* heap);
8200 8205
8201 static const int kForInFastCaseMarker = 0;
8202 static const int kForInSlowCaseMarker = 1;
8203
8204 private: 8206 private:
8205 static const int kTypeChangeChecksumBits = 7; 8207 static const int kTypeChangeChecksumBits = 7;
8206 8208
8207 class ICTotalCountField: public BitField<int, 0, 8209 class ICTotalCountField: public BitField<int, 0,
8208 kSmiValueSize - kTypeChangeChecksumBits> {}; // NOLINT 8210 kSmiValueSize - kTypeChangeChecksumBits> {}; // NOLINT
8209 class OwnTypeChangeChecksum: public BitField<int, 8211 class OwnTypeChangeChecksum: public BitField<int,
8210 kSmiValueSize - kTypeChangeChecksumBits, 8212 kSmiValueSize - kTypeChangeChecksumBits,
8211 kTypeChangeChecksumBits> {}; // NOLINT 8213 kTypeChangeChecksumBits> {}; // NOLINT
8212 class ICsWithTypeInfoCountField: public BitField<int, 0, 8214 class ICsWithTypeInfoCountField: public BitField<int, 0,
8213 kSmiValueSize - kTypeChangeChecksumBits> {}; // NOLINT 8215 kSmiValueSize - kTypeChangeChecksumBits> {}; // NOLINT
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10779 } else { 10781 } else {
10780 value &= ~(1 << bit_position); 10782 value &= ~(1 << bit_position);
10781 } 10783 }
10782 return value; 10784 return value;
10783 } 10785 }
10784 }; 10786 };
10785 10787
10786 } } // namespace v8::internal 10788 } } // namespace v8::internal
10787 10789
10788 #endif // V8_OBJECTS_H_ 10790 #endif // V8_OBJECTS_H_
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