Line data Source code
1 : // Copyright 2018 the V8 project authors. All rights reserved.
2 : // Use of this source code is governed by a BSD-style license that can be
3 : // found in the LICENSE file.
4 :
5 : #ifndef V8_OBJECTS_API_CALLBACKS_H_
6 : #define V8_OBJECTS_API_CALLBACKS_H_
7 :
8 : #include "src/objects/struct.h"
9 :
10 : // Has to be the last include (doesn't have include guards):
11 : #include "src/objects/object-macros.h"
12 :
13 : namespace v8 {
14 : namespace internal {
15 :
16 : // An accessor must have a getter, but can have no setter.
17 : //
18 : // When setting a property, V8 searches accessors in prototypes.
19 : // If an accessor was found and it does not have a setter,
20 : // the request is ignored.
21 : //
22 : // If the accessor in the prototype has the READ_ONLY property attribute, then
23 : // a new value is added to the derived object when the property is set.
24 : // This shadows the accessor in the prototype.
25 : class AccessorInfo : public Struct {
26 : public:
27 : DECL_ACCESSORS(name, Name)
28 : DECL_INT_ACCESSORS(flags)
29 : DECL_ACCESSORS(expected_receiver_type, Object)
30 : // This directly points at a foreign C function to be used from the runtime.
31 : DECL_ACCESSORS(getter, Object)
32 : inline bool has_getter();
33 : DECL_ACCESSORS(setter, Object)
34 : inline bool has_setter();
35 : // This either points at the same as above, or a trampoline in case we are
36 : // running with the simulator. Use these entries from generated code.
37 : DECL_ACCESSORS(js_getter, Object)
38 : DECL_ACCESSORS(data, Object)
39 :
40 : static Address redirect(Address address, AccessorComponent component);
41 : Address redirected_getter() const;
42 :
43 : // Dispatched behavior.
44 : DECL_PRINTER(AccessorInfo)
45 :
46 : DECL_BOOLEAN_ACCESSORS(all_can_read)
47 : DECL_BOOLEAN_ACCESSORS(all_can_write)
48 : DECL_BOOLEAN_ACCESSORS(is_special_data_property)
49 : DECL_BOOLEAN_ACCESSORS(replace_on_access)
50 : DECL_BOOLEAN_ACCESSORS(is_sloppy)
51 :
52 : inline SideEffectType getter_side_effect_type() const;
53 : inline void set_getter_side_effect_type(SideEffectType type);
54 :
55 : inline SideEffectType setter_side_effect_type() const;
56 : inline void set_setter_side_effect_type(SideEffectType type);
57 :
58 : // The property attributes used when an API object template is instantiated
59 : // for the first time. Changing of this value afterwards does not affect
60 : // the actual attributes of a property.
61 : inline PropertyAttributes initial_property_attributes() const;
62 : inline void set_initial_property_attributes(PropertyAttributes attributes);
63 :
64 : // Checks whether the given receiver is compatible with this accessor.
65 : static bool IsCompatibleReceiverMap(Handle<AccessorInfo> info,
66 : Handle<Map> map);
67 : inline bool IsCompatibleReceiver(Object receiver);
68 :
69 : DECL_CAST(AccessorInfo)
70 :
71 : // Dispatched behavior.
72 : DECL_VERIFIER(AccessorInfo)
73 :
74 : // Append all descriptors to the array that are not already there.
75 : // Return number added.
76 : static int AppendUnique(Isolate* isolate, Handle<Object> descriptors,
77 : Handle<FixedArray> array, int valid_descriptors);
78 :
79 : // Layout description.
80 : #define ACCESSOR_INFO_FIELDS(V) \
81 : V(kNameOffset, kTaggedSize) \
82 : V(kFlagsOffset, kTaggedSize) \
83 : V(kExpectedReceiverTypeOffset, kTaggedSize) \
84 : V(kSetterOffset, kTaggedSize) \
85 : V(kGetterOffset, kTaggedSize) \
86 : V(kJsGetterOffset, kTaggedSize) \
87 : V(kDataOffset, kTaggedSize) \
88 : V(kSize, 0)
89 :
90 : DEFINE_FIELD_OFFSET_CONSTANTS(HeapObject::kHeaderSize, ACCESSOR_INFO_FIELDS)
91 : #undef ACCESSOR_INFO_FIELDS
92 :
93 : private:
94 : inline bool HasExpectedReceiverType();
95 :
96 : // Bit positions in |flags|.
97 : #define ACCESSOR_INFO_FLAGS_BIT_FIELDS(V, _) \
98 : V(AllCanReadBit, bool, 1, _) \
99 : V(AllCanWriteBit, bool, 1, _) \
100 : V(IsSpecialDataPropertyBit, bool, 1, _) \
101 : V(IsSloppyBit, bool, 1, _) \
102 : V(ReplaceOnAccessBit, bool, 1, _) \
103 : V(GetterSideEffectTypeBits, SideEffectType, 2, _) \
104 : /* We could save a bit from setter side-effect type, if necessary */ \
105 : V(SetterSideEffectTypeBits, SideEffectType, 2, _) \
106 : V(InitialAttributesBits, PropertyAttributes, 3, _)
107 :
108 : DEFINE_BIT_FIELDS(ACCESSOR_INFO_FLAGS_BIT_FIELDS)
109 : #undef ACCESSOR_INFO_FLAGS_BIT_FIELDS
110 :
111 493234 : OBJECT_CONSTRUCTORS(AccessorInfo, Struct);
112 : };
113 :
114 : class AccessCheckInfo : public Struct {
115 : public:
116 : DECL_ACCESSORS(callback, Object)
117 : DECL_ACCESSORS(named_interceptor, Object)
118 : DECL_ACCESSORS(indexed_interceptor, Object)
119 : DECL_ACCESSORS(data, Object)
120 :
121 : DECL_CAST(AccessCheckInfo)
122 :
123 : // Dispatched behavior.
124 : DECL_PRINTER(AccessCheckInfo)
125 : DECL_VERIFIER(AccessCheckInfo)
126 :
127 : static AccessCheckInfo Get(Isolate* isolate, Handle<JSObject> receiver);
128 :
129 : // Layout description.
130 : #define ACCESS_CHECK_INFO_FIELDS(V) \
131 : V(kCallbackOffset, kTaggedSize) \
132 : V(kNamedInterceptorOffset, kTaggedSize) \
133 : V(kIndexedInterceptorOffset, kTaggedSize) \
134 : V(kDataOffset, kTaggedSize) \
135 : V(kSize, 0)
136 :
137 : DEFINE_FIELD_OFFSET_CONSTANTS(HeapObject::kHeaderSize,
138 : ACCESS_CHECK_INFO_FIELDS)
139 : #undef ACCESS_CHECK_INFO_FIELDS
140 :
141 : OBJECT_CONSTRUCTORS(AccessCheckInfo, Struct);
142 : };
143 :
144 : class InterceptorInfo : public Struct {
145 : public:
146 : DECL_ACCESSORS(getter, Object)
147 : DECL_ACCESSORS(setter, Object)
148 : DECL_ACCESSORS(query, Object)
149 : DECL_ACCESSORS(descriptor, Object)
150 : DECL_ACCESSORS(deleter, Object)
151 : DECL_ACCESSORS(enumerator, Object)
152 : DECL_ACCESSORS(definer, Object)
153 : DECL_ACCESSORS(data, Object)
154 : DECL_BOOLEAN_ACCESSORS(can_intercept_symbols)
155 : DECL_BOOLEAN_ACCESSORS(all_can_read)
156 : DECL_BOOLEAN_ACCESSORS(non_masking)
157 : DECL_BOOLEAN_ACCESSORS(is_named)
158 : DECL_BOOLEAN_ACCESSORS(has_no_side_effect)
159 :
160 : inline int flags() const;
161 : inline void set_flags(int flags);
162 :
163 : DECL_CAST(InterceptorInfo)
164 :
165 : // Dispatched behavior.
166 : DECL_PRINTER(InterceptorInfo)
167 : DECL_VERIFIER(InterceptorInfo)
168 :
169 : // Layout description.
170 : #define INTERCEPTOR_INFO_FIELDS(V) \
171 : V(kGetterOffset, kTaggedSize) \
172 : V(kSetterOffset, kTaggedSize) \
173 : V(kQueryOffset, kTaggedSize) \
174 : V(kDescriptorOffset, kTaggedSize) \
175 : V(kDeleterOffset, kTaggedSize) \
176 : V(kEnumeratorOffset, kTaggedSize) \
177 : V(kDefinerOffset, kTaggedSize) \
178 : V(kDataOffset, kTaggedSize) \
179 : V(kFlagsOffset, kTaggedSize) \
180 : V(kSize, 0)
181 :
182 : DEFINE_FIELD_OFFSET_CONSTANTS(HeapObject::kHeaderSize,
183 : INTERCEPTOR_INFO_FIELDS)
184 : #undef INTERCEPTOR_INFO_FIELDS
185 :
186 : static const int kCanInterceptSymbolsBit = 0;
187 : static const int kAllCanReadBit = 1;
188 : static const int kNonMasking = 2;
189 : static const int kNamed = 3;
190 : static const int kHasNoSideEffect = 4;
191 :
192 679067 : OBJECT_CONSTRUCTORS(InterceptorInfo, Struct);
193 : };
194 :
195 : class CallHandlerInfo : public Tuple3 {
196 : public:
197 : DECL_ACCESSORS(callback, Object)
198 : DECL_ACCESSORS(js_callback, Object)
199 : DECL_ACCESSORS(data, Object)
200 :
201 : DECL_CAST(CallHandlerInfo)
202 :
203 : inline bool IsSideEffectFreeCallHandlerInfo() const;
204 : inline bool IsSideEffectCallHandlerInfo() const;
205 : inline void SetNextCallHasNoSideEffect();
206 : // Returns whether or not the next call can be side effect free.
207 : // Calling this will change the state back to having a side effect.
208 : inline bool NextCallHasNoSideEffect();
209 :
210 : // Dispatched behavior.
211 : DECL_PRINTER(CallHandlerInfo)
212 : DECL_VERIFIER(CallHandlerInfo)
213 :
214 : Address redirected_callback() const;
215 :
216 : static const int kCallbackOffset = kValue1Offset;
217 : static const int kJsCallbackOffset = kValue2Offset;
218 : static const int kDataOffset = kValue3Offset;
219 :
220 4005 : OBJECT_CONSTRUCTORS(CallHandlerInfo, Tuple3);
221 : };
222 :
223 : } // namespace internal
224 : } // namespace v8
225 :
226 : #include "src/objects/object-macros-undef.h"
227 :
228 : #endif // V8_OBJECTS_API_CALLBACKS_H_
|
