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1 // Copyright 2015 the V8 project authors. All rights reserved. | 1 // Copyright 2015 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_OBJECTS_H_ | 5 #ifndef V8_OBJECTS_H_ |
6 #define V8_OBJECTS_H_ | 6 #define V8_OBJECTS_H_ |
7 | 7 |
8 #include <iosfwd> | 8 #include <iosfwd> |
9 #include <memory> | 9 #include <memory> |
10 | 10 |
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2348 | 2348 |
2349 // Support functions for v8 api (needed for correct interceptor behavior). | 2349 // Support functions for v8 api (needed for correct interceptor behavior). |
2350 MUST_USE_RESULT static Maybe<bool> HasRealNamedProperty( | 2350 MUST_USE_RESULT static Maybe<bool> HasRealNamedProperty( |
2351 Handle<JSObject> object, Handle<Name> name); | 2351 Handle<JSObject> object, Handle<Name> name); |
2352 MUST_USE_RESULT static Maybe<bool> HasRealElementProperty( | 2352 MUST_USE_RESULT static Maybe<bool> HasRealElementProperty( |
2353 Handle<JSObject> object, uint32_t index); | 2353 Handle<JSObject> object, uint32_t index); |
2354 MUST_USE_RESULT static Maybe<bool> HasRealNamedCallbackProperty( | 2354 MUST_USE_RESULT static Maybe<bool> HasRealNamedCallbackProperty( |
2355 Handle<JSObject> object, Handle<Name> name); | 2355 Handle<JSObject> object, Handle<Name> name); |
2356 | 2356 |
2357 // Get the header size for a JSObject. Used to compute the index of | 2357 // Get the header size for a JSObject. Used to compute the index of |
2358 // internal fields as well as the number of internal fields. | 2358 // embedder fields as well as the number of embedder fields. |
2359 static inline int GetHeaderSize(InstanceType instance_type); | 2359 static inline int GetHeaderSize(InstanceType instance_type); |
2360 inline int GetHeaderSize(); | 2360 inline int GetHeaderSize(); |
2361 | 2361 |
2362 static inline int GetInternalFieldCount(Map* map); | 2362 static inline int GetEmbedderFieldCount(Map* map); |
2363 inline int GetInternalFieldCount(); | 2363 inline int GetEmbedderFieldCount(); |
2364 inline int GetInternalFieldOffset(int index); | 2364 inline int GetEmbedderFieldOffset(int index); |
2365 inline Object* GetInternalField(int index); | 2365 inline Object* GetEmbedderField(int index); |
2366 inline void SetInternalField(int index, Object* value); | 2366 inline void SetEmbedderField(int index, Object* value); |
2367 inline void SetInternalField(int index, Smi* value); | 2367 inline void SetEmbedderField(int index, Smi* value); |
2368 bool WasConstructedFromApiFunction(); | 2368 bool WasConstructedFromApiFunction(); |
2369 | 2369 |
2370 // Returns a new map with all transitions dropped from the object's current | 2370 // Returns a new map with all transitions dropped from the object's current |
2371 // map and the ElementsKind set. | 2371 // map and the ElementsKind set. |
2372 static Handle<Map> GetElementsTransitionMap(Handle<JSObject> object, | 2372 static Handle<Map> GetElementsTransitionMap(Handle<JSObject> object, |
2373 ElementsKind to_kind); | 2373 ElementsKind to_kind); |
2374 static void TransitionElementsKind(Handle<JSObject> object, | 2374 static void TransitionElementsKind(Handle<JSObject> object, |
2375 ElementsKind to_kind); | 2375 ElementsKind to_kind); |
2376 | 2376 |
2377 // Always use this to migrate an object to a new map. | 2377 // Always use this to migrate an object to a new map. |
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8035 // by the garbage collector. | 8035 // by the garbage collector. |
8036 DECL_ACCESSORS(next_function_link, Object) | 8036 DECL_ACCESSORS(next_function_link, Object) |
8037 | 8037 |
8038 // Prints the name of the function using PrintF. | 8038 // Prints the name of the function using PrintF. |
8039 void PrintName(FILE* out = stdout); | 8039 void PrintName(FILE* out = stdout); |
8040 | 8040 |
8041 DECLARE_CAST(JSFunction) | 8041 DECLARE_CAST(JSFunction) |
8042 | 8042 |
8043 // Calculate the instance size and in-object properties count. | 8043 // Calculate the instance size and in-object properties count. |
8044 void CalculateInstanceSize(InstanceType instance_type, | 8044 void CalculateInstanceSize(InstanceType instance_type, |
8045 int requested_internal_fields, int* instance_size, | 8045 int requested_embedder_fields, int* instance_size, |
8046 int* in_object_properties); | 8046 int* in_object_properties); |
8047 void CalculateInstanceSizeForDerivedClass(InstanceType instance_type, | 8047 void CalculateInstanceSizeForDerivedClass(InstanceType instance_type, |
8048 int requested_internal_fields, | 8048 int requested_embedder_fields, |
8049 int* instance_size, | 8049 int* instance_size, |
8050 int* in_object_properties); | 8050 int* in_object_properties); |
8051 static void CalculateInstanceSizeHelper(InstanceType instance_type, | 8051 static void CalculateInstanceSizeHelper(InstanceType instance_type, |
8052 int requested_internal_fields, | 8052 int requested_embedder_fields, |
8053 int requested_in_object_properties, | 8053 int requested_in_object_properties, |
8054 int* instance_size, | 8054 int* instance_size, |
8055 int* in_object_properties); | 8055 int* in_object_properties); |
8056 // Visiting policy flags define whether the code entry or next function | 8056 // Visiting policy flags define whether the code entry or next function |
8057 // should be visited or not. | 8057 // should be visited or not. |
8058 enum BodyVisitingPolicy { | 8058 enum BodyVisitingPolicy { |
8059 kVisitCodeEntry = 1 << 0, | 8059 kVisitCodeEntry = 1 << 0, |
8060 kVisitNextFunction = 1 << 1, | 8060 kVisitNextFunction = 1 << 1, |
8061 | 8061 |
8062 kSkipCodeEntryAndNextFunction = 0, | 8062 kSkipCodeEntryAndNextFunction = 0, |
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8129 // It is null value if this object is not used by any context. | 8129 // It is null value if this object is not used by any context. |
8130 DECL_ACCESSORS(native_context, Object) | 8130 DECL_ACCESSORS(native_context, Object) |
8131 | 8131 |
8132 // [hash]: The hash code property (undefined if not initialized yet). | 8132 // [hash]: The hash code property (undefined if not initialized yet). |
8133 DECL_ACCESSORS(hash, Object) | 8133 DECL_ACCESSORS(hash, Object) |
8134 | 8134 |
8135 DECLARE_CAST(JSGlobalProxy) | 8135 DECLARE_CAST(JSGlobalProxy) |
8136 | 8136 |
8137 inline bool IsDetachedFrom(JSGlobalObject* global) const; | 8137 inline bool IsDetachedFrom(JSGlobalObject* global) const; |
8138 | 8138 |
8139 static int SizeWithInternalFields(int internal_field_count); | 8139 static int SizeWithEmbedderFields(int embedder_field_count); |
8140 | 8140 |
8141 // Dispatched behavior. | 8141 // Dispatched behavior. |
8142 DECLARE_PRINTER(JSGlobalProxy) | 8142 DECLARE_PRINTER(JSGlobalProxy) |
8143 DECLARE_VERIFIER(JSGlobalProxy) | 8143 DECLARE_VERIFIER(JSGlobalProxy) |
8144 | 8144 |
8145 // Layout description. | 8145 // Layout description. |
8146 static const int kNativeContextOffset = JSObject::kHeaderSize; | 8146 static const int kNativeContextOffset = JSObject::kHeaderSize; |
8147 static const int kHashOffset = kNativeContextOffset + kPointerSize; | 8147 static const int kHashOffset = kNativeContextOffset + kPointerSize; |
8148 static const int kSize = kHashOffset + kPointerSize; | 8148 static const int kSize = kHashOffset + kPointerSize; |
8149 | 8149 |
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10419 DISALLOW_IMPLICIT_CONSTRUCTORS(JSMap); | 10419 DISALLOW_IMPLICIT_CONSTRUCTORS(JSMap); |
10420 }; | 10420 }; |
10421 | 10421 |
10422 class JSArrayIterator : public JSObject { | 10422 class JSArrayIterator : public JSObject { |
10423 public: | 10423 public: |
10424 DECLARE_PRINTER(JSArrayIterator) | 10424 DECLARE_PRINTER(JSArrayIterator) |
10425 DECLARE_VERIFIER(JSArrayIterator) | 10425 DECLARE_VERIFIER(JSArrayIterator) |
10426 | 10426 |
10427 DECLARE_CAST(JSArrayIterator) | 10427 DECLARE_CAST(JSArrayIterator) |
10428 | 10428 |
10429 // [object]: the [[IteratedObject]] internal field. | 10429 // [object]: the [[IteratedObject]] inobject property. |
10430 DECL_ACCESSORS(object, Object) | 10430 DECL_ACCESSORS(object, Object) |
10431 | 10431 |
10432 // [index]: The [[ArrayIteratorNextIndex]] internal field. | 10432 // [index]: The [[ArrayIteratorNextIndex]] inobject property. |
10433 DECL_ACCESSORS(index, Object) | 10433 DECL_ACCESSORS(index, Object) |
10434 | 10434 |
10435 // [map]: The Map of the [[IteratedObject]] field at the time the iterator is | 10435 // [map]: The Map of the [[IteratedObject]] field at the time the iterator is |
10436 // allocated. | 10436 // allocated. |
10437 DECL_ACCESSORS(object_map, Object) | 10437 DECL_ACCESSORS(object_map, Object) |
10438 | 10438 |
10439 // Return the ElementsKind that a JSArrayIterator's [[IteratedObject]] is | 10439 // Return the ElementsKind that a JSArrayIterator's [[IteratedObject]] is |
10440 // expected to have, based on its instance type. | 10440 // expected to have, based on its instance type. |
10441 static ElementsKind ElementsKindForInstanceType(InstanceType instance_type); | 10441 static ElementsKind ElementsKindForInstanceType(InstanceType instance_type); |
10442 | 10442 |
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10476 }; | 10476 }; |
10477 | 10477 |
10478 class JSStringIterator : public JSObject { | 10478 class JSStringIterator : public JSObject { |
10479 public: | 10479 public: |
10480 // Dispatched behavior. | 10480 // Dispatched behavior. |
10481 DECLARE_PRINTER(JSStringIterator) | 10481 DECLARE_PRINTER(JSStringIterator) |
10482 DECLARE_VERIFIER(JSStringIterator) | 10482 DECLARE_VERIFIER(JSStringIterator) |
10483 | 10483 |
10484 DECLARE_CAST(JSStringIterator) | 10484 DECLARE_CAST(JSStringIterator) |
10485 | 10485 |
10486 // [string]: the [[IteratedString]] internal field. | 10486 // [string]: the [[IteratedString]] inobject property. |
10487 DECL_ACCESSORS(string, String) | 10487 DECL_ACCESSORS(string, String) |
10488 | 10488 |
10489 // [index]: The [[StringIteratorNextIndex]] internal field. | 10489 // [index]: The [[StringIteratorNextIndex]] inobject property. |
10490 inline int index() const; | 10490 inline int index() const; |
10491 inline void set_index(int value); | 10491 inline void set_index(int value); |
10492 | 10492 |
10493 static const int kStringOffset = JSObject::kHeaderSize; | 10493 static const int kStringOffset = JSObject::kHeaderSize; |
10494 static const int kNextIndexOffset = kStringOffset + kPointerSize; | 10494 static const int kNextIndexOffset = kStringOffset + kPointerSize; |
10495 static const int kSize = kNextIndexOffset + kPointerSize; | 10495 static const int kSize = kNextIndexOffset + kPointerSize; |
10496 | 10496 |
10497 private: | 10497 private: |
10498 DISALLOW_IMPLICIT_CONSTRUCTORS(JSStringIterator); | 10498 DISALLOW_IMPLICIT_CONSTRUCTORS(JSStringIterator); |
10499 }; | 10499 }; |
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10727 static const int kByteLengthOffset = JSObject::kHeaderSize; | 10727 static const int kByteLengthOffset = JSObject::kHeaderSize; |
10728 static const int kBackingStoreOffset = kByteLengthOffset + kPointerSize; | 10728 static const int kBackingStoreOffset = kByteLengthOffset + kPointerSize; |
10729 static const int kBitFieldSlot = kBackingStoreOffset + kPointerSize; | 10729 static const int kBitFieldSlot = kBackingStoreOffset + kPointerSize; |
10730 #if V8_TARGET_LITTLE_ENDIAN || !V8_HOST_ARCH_64_BIT | 10730 #if V8_TARGET_LITTLE_ENDIAN || !V8_HOST_ARCH_64_BIT |
10731 static const int kBitFieldOffset = kBitFieldSlot; | 10731 static const int kBitFieldOffset = kBitFieldSlot; |
10732 #else | 10732 #else |
10733 static const int kBitFieldOffset = kBitFieldSlot + kIntSize; | 10733 static const int kBitFieldOffset = kBitFieldSlot + kIntSize; |
10734 #endif | 10734 #endif |
10735 static const int kSize = kBitFieldSlot + kPointerSize; | 10735 static const int kSize = kBitFieldSlot + kPointerSize; |
10736 | 10736 |
10737 static const int kSizeWithInternalFields = | 10737 static const int kSizeWithEmbedderFields = |
10738 kSize + v8::ArrayBuffer::kInternalFieldCount * kPointerSize; | 10738 kSize + v8::ArrayBuffer::kEmbedderFieldCount * kPointerSize; |
10739 | 10739 |
10740 // Iterates all fields in the object including internal ones except | 10740 // Iterates all fields in the object including internal ones except |
10741 // kBackingStoreOffset and kBitFieldSlot. | 10741 // kBackingStoreOffset and kBitFieldSlot. |
10742 class BodyDescriptor; | 10742 class BodyDescriptor; |
10743 | 10743 |
10744 class IsExternal : public BitField<bool, 1, 1> {}; | 10744 class IsExternal : public BitField<bool, 1, 1> {}; |
10745 class IsNeuterable : public BitField<bool, 2, 1> {}; | 10745 class IsNeuterable : public BitField<bool, 2, 1> {}; |
10746 class WasNeutered : public BitField<bool, 3, 1> {}; | 10746 class WasNeutered : public BitField<bool, 3, 1> {}; |
10747 class IsShared : public BitField<bool, 4, 1> {}; | 10747 class IsShared : public BitField<bool, 4, 1> {}; |
10748 class HasGuardRegion : public BitField<bool, 5, 1> {}; | 10748 class HasGuardRegion : public BitField<bool, 5, 1> {}; |
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10806 Handle<Object> receiver, | 10806 Handle<Object> receiver, |
10807 const char* method_name); | 10807 const char* method_name); |
10808 | 10808 |
10809 // Dispatched behavior. | 10809 // Dispatched behavior. |
10810 DECLARE_PRINTER(JSTypedArray) | 10810 DECLARE_PRINTER(JSTypedArray) |
10811 DECLARE_VERIFIER(JSTypedArray) | 10811 DECLARE_VERIFIER(JSTypedArray) |
10812 | 10812 |
10813 static const int kLengthOffset = kViewSize + kPointerSize; | 10813 static const int kLengthOffset = kViewSize + kPointerSize; |
10814 static const int kSize = kLengthOffset + kPointerSize; | 10814 static const int kSize = kLengthOffset + kPointerSize; |
10815 | 10815 |
10816 static const int kSizeWithInternalFields = | 10816 static const int kSizeWithEmbedderFields = |
10817 kSize + v8::ArrayBufferView::kInternalFieldCount * kPointerSize; | 10817 kSize + v8::ArrayBufferView::kEmbedderFieldCount * kPointerSize; |
10818 | 10818 |
10819 private: | 10819 private: |
10820 static Handle<JSArrayBuffer> MaterializeArrayBuffer( | 10820 static Handle<JSArrayBuffer> MaterializeArrayBuffer( |
10821 Handle<JSTypedArray> typed_array); | 10821 Handle<JSTypedArray> typed_array); |
10822 #ifdef VERIFY_HEAP | 10822 #ifdef VERIFY_HEAP |
10823 DECL_ACCESSORS(raw_length, Object) | 10823 DECL_ACCESSORS(raw_length, Object) |
10824 #endif | 10824 #endif |
10825 | 10825 |
10826 DISALLOW_IMPLICIT_CONSTRUCTORS(JSTypedArray); | 10826 DISALLOW_IMPLICIT_CONSTRUCTORS(JSTypedArray); |
10827 }; | 10827 }; |
10828 | 10828 |
10829 | 10829 |
10830 class JSDataView: public JSArrayBufferView { | 10830 class JSDataView: public JSArrayBufferView { |
10831 public: | 10831 public: |
10832 DECLARE_CAST(JSDataView) | 10832 DECLARE_CAST(JSDataView) |
10833 | 10833 |
10834 // Dispatched behavior. | 10834 // Dispatched behavior. |
10835 DECLARE_PRINTER(JSDataView) | 10835 DECLARE_PRINTER(JSDataView) |
10836 DECLARE_VERIFIER(JSDataView) | 10836 DECLARE_VERIFIER(JSDataView) |
10837 | 10837 |
10838 static const int kSize = kViewSize; | 10838 static const int kSize = kViewSize; |
10839 | 10839 |
10840 static const int kSizeWithInternalFields = | 10840 static const int kSizeWithEmbedderFields = |
10841 kSize + v8::ArrayBufferView::kInternalFieldCount * kPointerSize; | 10841 kSize + v8::ArrayBufferView::kEmbedderFieldCount * kPointerSize; |
10842 | 10842 |
10843 private: | 10843 private: |
10844 DISALLOW_IMPLICIT_CONSTRUCTORS(JSDataView); | 10844 DISALLOW_IMPLICIT_CONSTRUCTORS(JSDataView); |
10845 }; | 10845 }; |
10846 | 10846 |
10847 | 10847 |
10848 // Foreign describes objects pointing from JavaScript to C structures. | 10848 // Foreign describes objects pointing from JavaScript to C structures. |
10849 class Foreign: public HeapObject { | 10849 class Foreign: public HeapObject { |
10850 public: | 10850 public: |
10851 // [address]: field containing the address. | 10851 // [address]: field containing the address. |
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11322 static const int kAcceptAnyReceiver = 6; | 11322 static const int kAcceptAnyReceiver = 6; |
11323 | 11323 |
11324 DISALLOW_IMPLICIT_CONSTRUCTORS(FunctionTemplateInfo); | 11324 DISALLOW_IMPLICIT_CONSTRUCTORS(FunctionTemplateInfo); |
11325 }; | 11325 }; |
11326 | 11326 |
11327 | 11327 |
11328 class ObjectTemplateInfo: public TemplateInfo { | 11328 class ObjectTemplateInfo: public TemplateInfo { |
11329 public: | 11329 public: |
11330 DECL_ACCESSORS(constructor, Object) | 11330 DECL_ACCESSORS(constructor, Object) |
11331 DECL_ACCESSORS(data, Object) | 11331 DECL_ACCESSORS(data, Object) |
11332 DECL_INT_ACCESSORS(internal_field_count) | 11332 DECL_INT_ACCESSORS(embedder_field_count) |
11333 DECL_BOOLEAN_ACCESSORS(immutable_proto) | 11333 DECL_BOOLEAN_ACCESSORS(immutable_proto) |
11334 | 11334 |
11335 DECLARE_CAST(ObjectTemplateInfo) | 11335 DECLARE_CAST(ObjectTemplateInfo) |
11336 | 11336 |
11337 // Dispatched behavior. | 11337 // Dispatched behavior. |
11338 DECLARE_PRINTER(ObjectTemplateInfo) | 11338 DECLARE_PRINTER(ObjectTemplateInfo) |
11339 DECLARE_VERIFIER(ObjectTemplateInfo) | 11339 DECLARE_VERIFIER(ObjectTemplateInfo) |
11340 | 11340 |
11341 static const int kConstructorOffset = TemplateInfo::kHeaderSize; | 11341 static const int kConstructorOffset = TemplateInfo::kHeaderSize; |
11342 // LSB is for immutable_proto, higher bits for internal_field_count | 11342 // LSB is for immutable_proto, higher bits for embedder_field_count |
11343 static const int kDataOffset = kConstructorOffset + kPointerSize; | 11343 static const int kDataOffset = kConstructorOffset + kPointerSize; |
11344 static const int kSize = kDataOffset + kPointerSize; | 11344 static const int kSize = kDataOffset + kPointerSize; |
11345 | 11345 |
11346 // Starting from given object template's constructor walk up the inheritance | 11346 // Starting from given object template's constructor walk up the inheritance |
11347 // chain till a function template that has an instance template is found. | 11347 // chain till a function template that has an instance template is found. |
11348 inline ObjectTemplateInfo* GetParent(Isolate* isolate); | 11348 inline ObjectTemplateInfo* GetParent(Isolate* isolate); |
11349 | 11349 |
11350 private: | 11350 private: |
11351 class IsImmutablePrototype : public BitField<bool, 0, 1> {}; | 11351 class IsImmutablePrototype : public BitField<bool, 0, 1> {}; |
11352 class InternalFieldCount | 11352 class EmbedderFieldCount |
11353 : public BitField<int, IsImmutablePrototype::kNext, 29> {}; | 11353 : public BitField<int, IsImmutablePrototype::kNext, 29> {}; |
11354 }; | 11354 }; |
11355 | 11355 |
11356 | 11356 |
11357 // The DebugInfo class holds additional information for a function being | 11357 // The DebugInfo class holds additional information for a function being |
11358 // debugged. | 11358 // debugged. |
11359 class DebugInfo: public Struct { | 11359 class DebugInfo: public Struct { |
11360 public: | 11360 public: |
11361 // The shared function info for the source being debugged. | 11361 // The shared function info for the source being debugged. |
11362 DECL_ACCESSORS(shared, SharedFunctionInfo) | 11362 DECL_ACCESSORS(shared, SharedFunctionInfo) |
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11571 } | 11571 } |
11572 }; | 11572 }; |
11573 | 11573 |
11574 | 11574 |
11575 } // NOLINT, false-positive due to second-order macros. | 11575 } // NOLINT, false-positive due to second-order macros. |
11576 } // NOLINT, false-positive due to second-order macros. | 11576 } // NOLINT, false-positive due to second-order macros. |
11577 | 11577 |
11578 #include "src/objects/object-macros-undef.h" | 11578 #include "src/objects/object-macros-undef.h" |
11579 | 11579 |
11580 #endif // V8_OBJECTS_H_ | 11580 #endif // V8_OBJECTS_H_ |
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