v8::internal::Internals Class Reference

This class exports constants and functionality from within v8 that is necessary to implement inline functions in the v8 api. More...

#include <v8.h>

Collaboration diagram for v8::internal::Internals:

Static Public Member Functions
static void	CheckInitializedImpl (v8::Isolate *isolate)
static void	CheckInitialized (v8::Isolate *isolate)
static bool	HasHeapObjectTag (const internal::Object *value)
static int	SmiValue (const internal::Object *value)
static internal::Object *	IntToSmi (int value)
static bool	IsValidSmi (intptr_t value)
static int	GetInstanceType (const internal::Object *obj)
static int	GetOddballKind (const internal::Object *obj)
static bool	IsExternalTwoByteString (int instance_type)
static uint8_t	GetNodeFlag (internal::Object **obj, int shift)
static void	UpdateNodeFlag (internal::Object **obj, bool value, int shift)
static uint8_t	GetNodeState (internal::Object **obj)
static void	UpdateNodeState (internal::Object **obj, uint8_t value)
static void	SetEmbedderData (v8::Isolate *isolate, uint32_t slot, void *data)
static void *	GetEmbedderData (const v8::Isolate *isolate, uint32_t slot)
static internal::Object **	GetRoot (v8::Isolate *isolate, int index)
template<typename T >
static T	ReadField (const internal::Object *ptr, int offset)
template<typename T >
static T	ReadEmbedderData (const v8::Context *context, int index)

Static Public Attributes
static const int	kHeapObjectMapOffset = 0
static const int	kMapInstanceTypeAndBitFieldOffset
static const int	kStringResourceOffset = 3 * kApiPointerSize
static const int	kOddballKindOffset = 3 * kApiPointerSize
static const int	kForeignAddressOffset = kApiPointerSize
static const int	kJSObjectHeaderSize = 3 * kApiPointerSize
static const int	kFixedArrayHeaderSize = 2 * kApiPointerSize
static const int	kContextHeaderSize = 2 * kApiPointerSize
static const int	kContextEmbedderDataIndex = 95
static const int	kFullStringRepresentationMask = 0x07
static const int	kStringEncodingMask = 0x4
static const int	kExternalTwoByteRepresentationTag = 0x02
static const int	kExternalOneByteRepresentationTag = 0x06
static const int	kIsolateEmbedderDataOffset = 0 * kApiPointerSize
static const int	kAmountOfExternalAllocatedMemoryOffset
static const int	kAmountOfExternalAllocatedMemoryAtLastGlobalGCOffset
static const int	kIsolateRootsOffset
static const int	kUndefinedValueRootIndex = 5
static const int	kNullValueRootIndex = 7
static const int	kTrueValueRootIndex = 8
static const int	kFalseValueRootIndex = 9
static const int	kEmptyStringRootIndex = 164
static const int	kExternalAllocationLimit = 192 * 1024 * 1024
static const int	kNodeClassIdOffset = 1 * kApiPointerSize
static const int	kNodeFlagsOffset = 1 * kApiPointerSize + 3
static const int	kNodeStateMask = 0xf
static const int	kNodeStateIsWeakValue = 2
static const int	kNodeStateIsPendingValue = 3
static const int	kNodeStateIsNearDeathValue = 4
static const int	kNodeIsIndependentShift = 4
static const int	kNodeIsPartiallyDependentShift = 5
static const int	kJSObjectType = 0xbc
static const int	kFirstNonstringType = 0x80
static const int	kOddballType = 0x83
static const int	kForeignType = 0x88
static const int	kUndefinedOddballKind = 5
static const int	kNullOddballKind = 3
static const uint32_t	kNumIsolateDataSlots = 4

Detailed Description

This class exports constants and functionality from within v8 that is necessary to implement inline functions in the v8 api.

Don't depend on functions and constants defined here.

Definition at line 5815 of file v8.h.

Member Function Documentation

CheckInitialized()

static void v8::internal::Internals::CheckInitialized ( v8::Isolate *  isolate )

inlinestatic

Definition at line 5873 of file v8.h.

                                                             {
#ifdef V8_ENABLE_CHECKS
    CheckInitializedImpl(isolate);
#endif
  }

References CheckInitializedImpl().

Here is the call graph for this function:

CheckInitializedImpl()

static void v8::internal::Internals::CheckInitializedImpl ( v8::Isolate *  isolate )

static

Referenced by CheckInitialized().

Here is the caller graph for this function:

GetEmbedderData()

static void* v8::internal::Internals::GetEmbedderData ( const v8::Isolate *  isolate, uint32_t  slot  )

inlinestatic

Definition at line 5945 of file v8.h.

                                                        {
    const uint8_t* addr = reinterpret_cast<const uint8_t*>(isolate) +
        kIsolateEmbedderDataOffset + slot * kApiPointerSize;
    return *reinterpret_cast<void* const*>(addr);
  }

References v8::internal::kApiPointerSize, and kIsolateEmbedderDataOffset.

GetInstanceType()

static int v8::internal::Internals::GetInstanceType ( const internal::Object *  obj )

inlinestatic

Definition at line 5896 of file v8.h.

                                                                  {
    typedef internal::Object O;
    O* map = ReadField<O*>(obj, kHeapObjectMapOffset);
    // Map::InstanceType is defined so that it will always be loaded into
    // the LS 8 bits of one 16-bit word, regardless of endianess.
    return ReadField<uint16_t>(map, kMapInstanceTypeAndBitFieldOffset) & 0xff;
  }

References kHeapObjectMapOffset, kMapInstanceTypeAndBitFieldOffset, and map.

GetNodeFlag()

static uint8_t v8::internal::Internals::GetNodeFlag ( internal::Object **  obj, int  shift  )

inlinestatic

Definition at line 5914 of file v8.h.

                                                                        {
      uint8_t* addr = reinterpret_cast<uint8_t*>(obj) + kNodeFlagsOffset;
      return *addr & static_cast<uint8_t>(1U << shift);
  }

References kNodeFlagsOffset, and shift.

GetNodeState()

static uint8_t v8::internal::Internals::GetNodeState ( internal::Object **  obj )

inlinestatic

Definition at line 5926 of file v8.h.

                                                              {
    uint8_t* addr = reinterpret_cast<uint8_t*>(obj) + kNodeFlagsOffset;
    return *addr & kNodeStateMask;
  }

References kNodeFlagsOffset, and kNodeStateMask.

GetOddballKind()

static int v8::internal::Internals::GetOddballKind ( const internal::Object *  obj )

inlinestatic

Definition at line 5904 of file v8.h.

                                                                 {
    typedef internal::Object O;
    return SmiValue(ReadField<O*>(obj, kOddballKindOffset));
  }

References kOddballKindOffset, and SmiValue().

Here is the call graph for this function:

GetRoot()

static internal::Object** v8::internal::Internals::GetRoot ( v8::Isolate *  isolate, int  index  )

inlinestatic

Definition at line 5952 of file v8.h.

                                                         {
    uint8_t* addr = reinterpret_cast<uint8_t*>(isolate) + kIsolateRootsOffset;
    return reinterpret_cast<internal::Object**>(addr + index * kApiPointerSize);
  }

References v8::internal::kApiPointerSize, and kIsolateRootsOffset.

HasHeapObjectTag()

static bool v8::internal::Internals::HasHeapObjectTag ( const internal::Object *  value )

inlinestatic

Definition at line 5879 of file v8.h.

                                                                      {
    return ((reinterpret_cast<intptr_t>(value) & kHeapObjectTagMask) ==
            kHeapObjectTag);
  }

References v8::internal::kHeapObjectTag, and v8::internal::kHeapObjectTagMask.

IntToSmi()

static internal::Object* v8::internal::Internals::IntToSmi ( int  value )

inlinestatic

Definition at line 5888 of file v8.h.

                                                       {
    return PlatformSmiTagging::IntToSmi(value);
  }

References v8::internal::IntToSmi().

Referenced by v8::internal::Smi::FromInt().

Here is the call graph for this function:

Here is the caller graph for this function:

IsExternalTwoByteString()

static bool v8::internal::Internals::IsExternalTwoByteString ( int  instance_type )

inlinestatic

Definition at line 5909 of file v8.h.

                                                                   {
    int representation = (instance_type & kFullStringRepresentationMask);
    return representation == kExternalTwoByteRepresentationTag;
  }

References kExternalTwoByteRepresentationTag, and kFullStringRepresentationMask.

IsValidSmi()

static bool v8::internal::Internals::IsValidSmi ( intptr_t  value )

inlinestatic

Definition at line 5892 of file v8.h.

                                                   {
    return PlatformSmiTagging::IsValidSmi(value);
  }

Referenced by v8::internal::Smi::IsValid().

Here is the caller graph for this function:

ReadEmbedderData()

template<typename T >

static T v8::internal::Internals::ReadEmbedderData ( const v8::Context *  context, int  index  )

inlinestatic

Definition at line 5966 of file v8.h.

                                                                           {
    typedef internal::Object O;
    typedef internal::Internals I;
    O* ctx = *reinterpret_cast<O* const*>(context);
    int embedder_data_offset = I::kContextHeaderSize +
        (internal::kApiPointerSize * I::kContextEmbedderDataIndex);
    O* embedder_data = I::ReadField<O*>(ctx, embedder_data_offset);
    int value_offset =
        I::kFixedArrayHeaderSize + (internal::kApiPointerSize * index);
    return I::ReadField<T>(embedder_data, value_offset);
  }

References v8::internal::I, and v8::internal::kApiPointerSize.

ReadField()

template<typename T >

static T v8::internal::Internals::ReadField ( const internal::Object *  ptr, int  offset  )

inlinestatic

Definition at line 5959 of file v8.h.

                                                                      {
    const uint8_t* addr =
        reinterpret_cast<const uint8_t*>(ptr) + offset - kHeapObjectTag;
    return *reinterpret_cast<const T*>(addr);
  }

References v8::internal::kHeapObjectTag, and T.

SetEmbedderData()

static void v8::internal::Internals::SetEmbedderData ( v8::Isolate *  isolate, uint32_t  slot, void *  data  )

inlinestatic

Definition at line 5937 of file v8.h.

                                                    {
    uint8_t *addr = reinterpret_cast<uint8_t *>(isolate) +
                    kIsolateEmbedderDataOffset + slot * kApiPointerSize;
    *reinterpret_cast<void**>(addr) = data;
  }

References v8::internal::kApiPointerSize, and kIsolateEmbedderDataOffset.

SmiValue()

static int v8::internal::Internals::SmiValue ( const internal::Object *  value )

inlinestatic

Definition at line 5884 of file v8.h.

                                                             {
    return PlatformSmiTagging::SmiToInt(value);
  }

Referenced by GetOddballKind(), and v8::internal::Smi::value().

Here is the caller graph for this function:

UpdateNodeFlag()

static void v8::internal::Internals::UpdateNodeFlag ( internal::Object **  obj, bool  value, int  shift  )

inlinestatic

Definition at line 5919 of file v8.h.

                                                              {
      uint8_t* addr = reinterpret_cast<uint8_t*>(obj) + kNodeFlagsOffset;
      uint8_t mask = static_cast<uint8_t>(1U << shift);
      *addr = static_cast<uint8_t>((*addr & ~mask) | (value << shift));
  }

References kNodeFlagsOffset, and shift.

UpdateNodeState()

static void v8::internal::Internals::UpdateNodeState ( internal::Object **  obj, uint8_t  value  )

inlinestatic

Definition at line 5931 of file v8.h.

                                                       {
    uint8_t* addr = reinterpret_cast<uint8_t*>(obj) + kNodeFlagsOffset;
    *addr = static_cast<uint8_t>((*addr & ~kNodeStateMask) | value);
  }

References kNodeFlagsOffset, and kNodeStateMask.

Member Data Documentation

kAmountOfExternalAllocatedMemoryAtLastGlobalGCOffset

const int v8::internal::Internals::kAmountOfExternalAllocatedMemoryAtLastGlobalGCOffset

static

Initial value:

=
      kAmountOfExternalAllocatedMemoryOffset + kApiInt64Size

Definition at line 5838 of file v8.h.

Referenced by v8::internal::Isolate::Init().

kAmountOfExternalAllocatedMemoryOffset

const int v8::internal::Internals::kAmountOfExternalAllocatedMemoryOffset

static

Initial value:

=
      4 * kApiPointerSize

Definition at line 5836 of file v8.h.

Referenced by v8::internal::Isolate::Init().

kContextEmbedderDataIndex

const int v8::internal::Internals::kContextEmbedderDataIndex = 95

static

Definition at line 5829 of file v8.h.

kContextHeaderSize

const int v8::internal::Internals::kContextHeaderSize = 2 * kApiPointerSize

static

Definition at line 5828 of file v8.h.

kEmptyStringRootIndex

const int v8::internal::Internals::kEmptyStringRootIndex = 164

static

Definition at line 5847 of file v8.h.

kExternalAllocationLimit

const int v8::internal::Internals::kExternalAllocationLimit = 192 * 1024 * 1024

static

Definition at line 5851 of file v8.h.

kExternalOneByteRepresentationTag

const int v8::internal::Internals::kExternalOneByteRepresentationTag = 0x06

static

Definition at line 5833 of file v8.h.

kExternalTwoByteRepresentationTag

const int v8::internal::Internals::kExternalTwoByteRepresentationTag = 0x02

static

Definition at line 5832 of file v8.h.

Referenced by IsExternalTwoByteString().

kFalseValueRootIndex

const int v8::internal::Internals::kFalseValueRootIndex = 9

static

Definition at line 5846 of file v8.h.

kFirstNonstringType

const int v8::internal::Internals::kFirstNonstringType = 0x80

static

Definition at line 5863 of file v8.h.

kFixedArrayHeaderSize

const int v8::internal::Internals::kFixedArrayHeaderSize = 2 * kApiPointerSize

static

Definition at line 5827 of file v8.h.

kForeignAddressOffset

const int v8::internal::Internals::kForeignAddressOffset = kApiPointerSize

static

Definition at line 5825 of file v8.h.

kForeignType

const int v8::internal::Internals::kForeignType = 0x88

static

Definition at line 5865 of file v8.h.

kFullStringRepresentationMask

const int v8::internal::Internals::kFullStringRepresentationMask = 0x07

static

Definition at line 5830 of file v8.h.

Referenced by IsExternalTwoByteString().

kHeapObjectMapOffset

const int v8::internal::Internals::kHeapObjectMapOffset = 0

static

Definition at line 5819 of file v8.h.

Referenced by GetInstanceType().

kIsolateEmbedderDataOffset

const int v8::internal::Internals::kIsolateEmbedderDataOffset = 0 * kApiPointerSize

static

Definition at line 5835 of file v8.h.

Referenced by GetEmbedderData(), v8::internal::Isolate::Init(), and SetEmbedderData().

kIsolateRootsOffset

const int v8::internal::Internals::kIsolateRootsOffset

static

Initial value:

=
      kAmountOfExternalAllocatedMemoryAtLastGlobalGCOffset + kApiInt64Size +
      kApiPointerSize

Definition at line 5840 of file v8.h.

Referenced by GetRoot(), and v8::internal::Isolate::Init().

kJSObjectHeaderSize

const int v8::internal::Internals::kJSObjectHeaderSize = 3 * kApiPointerSize

static

Definition at line 5826 of file v8.h.

kJSObjectType

const int v8::internal::Internals::kJSObjectType = 0xbc

static

Definition at line 5862 of file v8.h.

kMapInstanceTypeAndBitFieldOffset

const int v8::internal::Internals::kMapInstanceTypeAndBitFieldOffset

static

Initial value:

=
      1 * kApiPointerSize + kApiIntSize

Definition at line 5820 of file v8.h.

Referenced by GetInstanceType().

kNodeClassIdOffset

const int v8::internal::Internals::kNodeClassIdOffset = 1 * kApiPointerSize

static

Definition at line 5853 of file v8.h.

Referenced by v8::internal::GlobalHandles::Node::Node().

kNodeFlagsOffset

const int v8::internal::Internals::kNodeFlagsOffset = 1 * kApiPointerSize + 3

static

Definition at line 5854 of file v8.h.

Referenced by GetNodeFlag(), GetNodeState(), v8::internal::GlobalHandles::Node::Node(), UpdateNodeFlag(), and UpdateNodeState().

kNodeIsIndependentShift

const int v8::internal::Internals::kNodeIsIndependentShift = 4

static

Definition at line 5859 of file v8.h.

Referenced by v8::internal::GlobalHandles::Node::Node().

kNodeIsPartiallyDependentShift

const int v8::internal::Internals::kNodeIsPartiallyDependentShift = 5

static

Definition at line 5860 of file v8.h.

Referenced by v8::internal::GlobalHandles::Node::Node().

kNodeStateIsNearDeathValue

const int v8::internal::Internals::kNodeStateIsNearDeathValue = 4

static

Definition at line 5858 of file v8.h.

Referenced by v8::internal::GlobalHandles::Node::Node().

kNodeStateIsPendingValue

const int v8::internal::Internals::kNodeStateIsPendingValue = 3

static

Definition at line 5857 of file v8.h.

Referenced by v8::internal::GlobalHandles::Node::Node().

kNodeStateIsWeakValue

const int v8::internal::Internals::kNodeStateIsWeakValue = 2

static

Definition at line 5856 of file v8.h.

Referenced by v8::internal::GlobalHandles::Node::Node().

kNodeStateMask

const int v8::internal::Internals::kNodeStateMask = 0xf

static

Definition at line 5855 of file v8.h.

Referenced by GetNodeState(), v8::internal::GlobalHandles::Node::Node(), and UpdateNodeState().

kNullOddballKind

const int v8::internal::Internals::kNullOddballKind = 3

static

Definition at line 5868 of file v8.h.

kNullValueRootIndex

const int v8::internal::Internals::kNullValueRootIndex = 7

static

Definition at line 5844 of file v8.h.

kNumIsolateDataSlots

const uint32_t v8::internal::Internals::kNumIsolateDataSlots = 4

static

Definition at line 5870 of file v8.h.

Referenced by v8::internal::Isolate::GetData(), and v8::internal::Isolate::SetData().

kOddballKindOffset

const int v8::internal::Internals::kOddballKindOffset = 3 * kApiPointerSize

static

Definition at line 5824 of file v8.h.

Referenced by GetOddballKind().

kOddballType

const int v8::internal::Internals::kOddballType = 0x83

static

Definition at line 5864 of file v8.h.

kStringEncodingMask

const int v8::internal::Internals::kStringEncodingMask = 0x4

static

Definition at line 5831 of file v8.h.

kStringResourceOffset

const int v8::internal::Internals::kStringResourceOffset = 3 * kApiPointerSize

static

Definition at line 5822 of file v8.h.

kTrueValueRootIndex

const int v8::internal::Internals::kTrueValueRootIndex = 8

static

Definition at line 5845 of file v8.h.

kUndefinedOddballKind

const int v8::internal::Internals::kUndefinedOddballKind = 5

static

Definition at line 5867 of file v8.h.

kUndefinedValueRootIndex

const int v8::internal::Internals::kUndefinedValueRootIndex = 5

static

Definition at line 5843 of file v8.h.

---

The documentation for this class was generated from the following file:

• /mnt/V8SourceCode/include/v8.h