src/accessors.h

   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 ExecutableAccessorInfo;
  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(FunctionArguments)            \
  26   V(FunctionCaller)               \
  27   V(FunctionName)                 \
  28   V(FunctionLength)               \
  29   V(FunctionPrototype)            \
  30   V(ScriptColumnOffset)           \
  31   V(ScriptCompilationType)        \
  32   V(ScriptContextData)            \
  33   V(ScriptEvalFromScript)         \
  34   V(ScriptEvalFromScriptPosition) \
  35   V(ScriptEvalFromFunctionName)   \
  36   V(ScriptId)                     \
  37   V(ScriptLineEnds)               \
  38   V(ScriptLineOffset)             \
  39   V(ScriptName)                   \
  40   V(ScriptSource)                 \
  41   V(ScriptType)                   \
  42   V(ScriptSourceUrl)              \
  43   V(ScriptSourceMappingUrl)       \
  44   V(ScriptIsEmbedderDebugScript)  \
  45   V(StringLength)
  46
  47 // Accessors contains all predefined proxy accessors.
  48
  49 class Accessors : public AllStatic {
  50  public:
  51   // Accessor descriptors.
  52 #define ACCESSOR_INFO_DECLARATION(name)                   \
  53   static void name##Getter(                               \
  54       v8::Local<v8::Name> name,                           \
  55       const v8::PropertyCallbackInfo<v8::Value>& info);   \
  56   static void name##Setter(                               \
  57       v8::Local<v8::Name> name,                           \
  58       v8::Local<v8::Value> value,                         \
  59       const v8::PropertyCallbackInfo<void>& info);   \
  60   static Handle<AccessorInfo> name##Info(                 \
  61       Isolate* isolate,                                   \
  62       PropertyAttributes attributes);
  63   ACCESSOR_INFO_LIST(ACCESSOR_INFO_DECLARATION)
  64 #undef ACCESSOR_INFO_DECLARATION
  65
  66   enum DescriptorId {
  67 #define ACCESSOR_INFO_DECLARATION(name) \
  68     k##name##Getter, \
  69     k##name##Setter,
  70   ACCESSOR_INFO_LIST(ACCESSOR_INFO_DECLARATION)
  71 #undef ACCESSOR_INFO_DECLARATION
  72     descriptorCount
  73   };
  74
  75   // Accessor functions called directly from the runtime system.
  76   MUST_USE_RESULT static MaybeHandle<Object> FunctionSetPrototype(
  77       Handle<JSFunction> object, Handle<Object> value);
  78   static Handle<Object> FunctionGetArguments(Handle<JSFunction> object);
  79
  80   // Accessor infos.
  81   static Handle<AccessorInfo> MakeModuleExport(
  82       Handle<String> name, int index, PropertyAttributes attributes);
  83
  84   // Returns true for properties that are accessors to object fields.
  85   // If true, *object_offset contains offset of object field.
  86   static bool IsJSObjectFieldAccessor(Handle<Map> map, Handle<Name> name,
  87                                       int* object_offset);
  88
  89   // Returns true for properties that are accessors to ArrayBufferView and
  90   // derived classes fields. If true, *object_offset contains offset of
  91   // object field. The caller still has to check whether the underlying
  92   // buffer was neutered.
  93   static bool IsJSArrayBufferViewFieldAccessor(Handle<Map> map,
  94                                                Handle<Name> name,
  95                                                int* object_offset);
  96
  97   static Handle<AccessorInfo> MakeAccessor(
  98       Isolate* isolate,
  99       Handle<Name> name,
 100       AccessorNameGetterCallback getter,
 101       AccessorNameSetterCallback setter,
 102       PropertyAttributes attributes);
 103
 104   static Handle<ExecutableAccessorInfo> CloneAccessor(
 105       Isolate* isolate,
 106       Handle<ExecutableAccessorInfo> accessor);
 107 };
 108
 109 } }  // namespace v8::internal
 110
 111 #endif  // V8_ACCESSORS_H_