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 3 // found in the LICENSE file. 4 5 #ifndef V8_ACCESSORS_H_ 6 #define V8_ACCESSORS_H_ 7 8 #include "include/v8.h" 9 #include "src/allocation.h" 10 #include "src/globals.h" 11 #include "src/handles.h" 12 #include "src/property-details.h" 13 14 namespace v8 { 15 namespace internal { 16 17 // Forward declarations. 18 class AccessorInfo; 19 20 // The list of accessor descriptors. This is a second-order macro 21 // taking a macro to be applied to all accessor descriptor names. 22 #define ACCESSOR_INFO_LIST(V) \ 23 V(ArgumentsIterator) \ 24 V(ArrayLength) \ 25 V(BoundFunctionLength) \ 26 V(BoundFunctionName) \ 27 V(ErrorStack) \ 28 V(FunctionArguments) \ 29 V(FunctionCaller) \ 30 V(FunctionName) \ 31 V(FunctionLength) \ 32 V(FunctionPrototype) \ 33 V(ScriptColumnOffset) \ 34 V(ScriptCompilationType) \ 35 V(ScriptContextData) \ 36 V(ScriptEvalFromScript) \ 37 V(ScriptEvalFromScriptPosition) \ 38 V(ScriptEvalFromFunctionName) \ 39 V(ScriptId) \ 40 V(ScriptLineOffset) \ 41 V(ScriptName) \ 42 V(ScriptSource) \ 43 V(ScriptType) \ 44 V(ScriptSourceUrl) \ 45 V(ScriptSourceMappingUrl) \ 46 V(ScriptIsEmbedderDebugScript) \ 47 V(StringLength) 48 49 #define ACCESSOR_SETTER_LIST(V) \ 50 V(ArrayLengthSetter) \ 51 V(ErrorStackSetter) \ 52 V(FunctionPrototypeSetter) \ 53 V(ModuleNamespaceEntrySetter) \ 54 V(ReconfigureToDataProperty) 55 56 // Accessors contains all predefined proxy accessors. 57 58 class Accessors : public AllStatic { 59 public: 60 // Accessor descriptors. 61 #define ACCESSOR_INFO_DECLARATION(name) \ 62 static void name##Getter( \ 63 v8::Local<v8::Name> name, \ 64 const v8::PropertyCallbackInfo<v8::Value>& info); \ 65 static Handle<AccessorInfo> name##Info( \ 66 Isolate* isolate, \ 67 PropertyAttributes attributes); 68 ACCESSOR_INFO_LIST(ACCESSOR_INFO_DECLARATION) 69 #undef ACCESSOR_INFO_DECLARATION 70 71 #define ACCESSOR_SETTER_DECLARATION(name) \ 72 static void name(v8::Local<v8::Name> name, v8::Local<v8::Value> value, \ 73 const v8::PropertyCallbackInfo<v8::Boolean>& info); 74 ACCESSOR_SETTER_LIST(ACCESSOR_SETTER_DECLARATION) 75 #undef ACCESSOR_SETTER_DECLARATION 76 77 static void ModuleNamespaceEntryGetter( 78 v8::Local<v8::Name> name, 79 const v8::PropertyCallbackInfo<v8::Value>& info); 80 static Handle<AccessorInfo> ModuleNamespaceEntryInfo( 81 Isolate* isolate, Handle<String> name, PropertyAttributes attributes); 82 83 enum DescriptorId { 84 #define ACCESSOR_INFO_DECLARATION(name) \ 85 k##name##Getter, \ 86 k##name##Setter, 87 ACCESSOR_INFO_LIST(ACCESSOR_INFO_DECLARATION) 88 #undef ACCESSOR_INFO_DECLARATION 89 descriptorCount 90 }; 91 92 // Accessor functions called directly from the runtime system. 93 MUST_USE_RESULT static MaybeHandle<Object> FunctionSetPrototype( 94 Handle<JSFunction> object, Handle<Object> value); 95 static Handle<JSObject> FunctionGetArguments(Handle<JSFunction> object); 96 97 // Returns true for properties that are accessors to object fields. 98 // If true, *object_offset contains offset of object field. 99 static bool IsJSObjectFieldAccessor(Handle<Map> map, Handle<Name> name, 100 int* object_offset); 101 102 // Create an AccessorInfo. The setter is optional (can be nullptr). 103 // 104 // Note that the type of setter is AccessorNameBooleanSetterCallback instead 105 // of v8::AccessorNameSetterCallback. The difference is that the former can 106 // set a (boolean) return value. The setter should roughly follow the same 107 // conventions as many of the internal methods in objects.cc: 108 // - The return value is unset iff there was an exception. 109 // - If the ShouldThrow argument is true, the return value must not be false. 110 typedef void (*AccessorNameBooleanSetterCallback)( 111 Local<v8::Name> property, Local<v8::Value> value, 112 const PropertyCallbackInfo<v8::Boolean>& info); 113 114 static Handle<AccessorInfo> MakeAccessor( 115 Isolate* isolate, Handle<Name> name, AccessorNameGetterCallback getter, 116 AccessorNameBooleanSetterCallback setter, PropertyAttributes attributes); 117 }; 118 119 } // namespace internal 120 } // namespace v8 121 122 #endif // V8_ACCESSORS_H_ 123
