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v8::internal::SerializedCodeData Class Reference

#include <serialize.h>

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Public Member Functions

 SerializedCodeData (ScriptData *data, String *source)
 
 SerializedCodeData (List< byte > *payload, CodeSerializer *cs)
 
 ~SerializedCodeData ()
 
ScriptData * GetScriptData ()
 
Vector< const uint32_t > CodeStubKeys () const
 
const byte * Payload () const
 
int PayloadLength () const
 
int GetReservation (int space) const
 

Private Member Functions

void SetHeaderValue (int offset, int value)
 
int GetHeaderValue (int offset) const
 
bool IsSane (String *source)
 
int CheckSum (String *source)
 

Private Attributes

ScriptData * script_data_
 
bool owns_script_data_
 

Static Private Attributes

static const int kCheckSumOffset = 0
 
static const int kNumCodeStubKeysOffset = 1
 
static const int kPayloadLengthOffset = 2
 
static const int kReservationsOffset = 3
 
static const int kHeaderEntries
 
static const int kHeaderSize = kHeaderEntries * kIntSize
 

Detailed Description

Definition at line 628 of file serialize.h.

Constructor & Destructor Documentation

◆ SerializedCodeData() [1/2]

v8::internal::SerializedCodeData::SerializedCodeData ( ScriptData *  data,
String *  source 
)
inlineexplicit

Definition at line 631 of file serialize.h.

632  : script_data_(data), owns_script_data_(false) {
633  DisallowHeapAllocation no_gc;
634  CHECK(IsSane(source));
635  }
v8::internal::SerializedCodeData::IsSane
bool IsSane(String *source)
Definition: serialize.cc:2103
CHECK
#define CHECK(condition)
Definition: logging.h:36
v8::internal::DisallowHeapAllocation
PerThreadAssertScopeDebugOnly< HEAP_ALLOCATION_ASSERT, false > DisallowHeapAllocation
Definition: assert-scope.h:110

References CHECK, and IsSane().

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◆ SerializedCodeData() [2/2]

v8::internal::SerializedCodeData::SerializedCodeData ( List< byte > *  payload,
CodeSerializer *  cs 
)

Definition at line 2068 of file serialize.cc.

2069  : owns_script_data_(true) {
2070  DisallowHeapAllocation no_gc;
2071  List<uint32_t>* stub_keys = cs->stub_keys();
2072 
2073  // Calculate sizes.
2074  int num_stub_keys = stub_keys->length();
2075  int stub_keys_size = stub_keys->length() * kInt32Size;
2076  int data_length = kHeaderSize + stub_keys_size + payload->length();
2077 
2078  // Allocate backing store and create result data.
2079  byte* data = NewArray<byte>(data_length);
2080  DCHECK(IsAligned(reinterpret_cast<intptr_t>(data), kPointerAlignment));
2081  script_data_ = new ScriptData(data, data_length);
2082  script_data_->AcquireDataOwnership();
2083 
2084  // Set header values.
2085  SetHeaderValue(kCheckSumOffset, CheckSum(cs->source()));
2086  SetHeaderValue(kNumCodeStubKeysOffset, num_stub_keys);
2087  SetHeaderValue(kPayloadLengthOffset, payload->length());
2088  STATIC_ASSERT(NEW_SPACE == 0);
2089  for (int i = 0; i < SerializerDeserializer::kNumberOfSpaces; i++) {
2090  SetHeaderValue(kReservationsOffset + i, cs->CurrentAllocationAddress(i));
2091  }
2092 
2093  // Copy code stub keys.
2094  CopyBytes(data + kHeaderSize, reinterpret_cast<byte*>(stub_keys->begin()),
2095  stub_keys_size);
2096 
2097  // Copy serialized data.
2098  CopyBytes(data + kHeaderSize + stub_keys_size, payload->begin(),
2099  static_cast<size_t>(payload->length()));
2100 }
v8::internal::List::begin
iterator begin() const
Definition: list.h:74
v8::internal::SerializedCodeData::kPayloadLengthOffset
static const int kPayloadLengthOffset
Definition: serialize.h:696
v8::internal::SerializedCodeData::SetHeaderValue
void SetHeaderValue(int offset, int value)
Definition: serialize.h:676
v8::internal::SerializedCodeData::kReservationsOffset
static const int kReservationsOffset
Definition: serialize.h:697
v8::internal::SerializedCodeData::kCheckSumOffset
static const int kCheckSumOffset
Definition: serialize.h:694
v8::internal::SerializedCodeData::CheckSum
int CheckSum(String *source)
Definition: serialize.cc:2109
v8::internal::SerializedCodeData::kNumCodeStubKeysOffset
static const int kNumCodeStubKeysOffset
Definition: serialize.h:695
v8::internal::SerializedCodeData::kHeaderSize
static const int kHeaderSize
Definition: serialize.h:701
DCHECK
#define DCHECK(condition)
Definition: logging.h:205
v8::internal::kInt32Size
const int kInt32Size
Definition: globals.h:125
v8::internal::STATIC_ASSERT
STATIC_ASSERT(sizeof(CPURegister)==sizeof(Register))
v8::internal::IsAligned
bool IsAligned(T value, U alignment)
Definition: utils.h:123
v8::internal::kPointerAlignment
const intptr_t kPointerAlignment
Definition: globals.h:230
v8::internal::CopyBytes
void CopyBytes(uint8_t *target, uint8_t *source)
Definition: runtime-typedarray.cc:552

References v8::internal::ScriptData::AcquireDataOwnership(), v8::internal::List< T, AllocationPolicy >::begin(), CheckSum(), v8::internal::CopyBytes(), v8::internal::cs, DCHECK, v8::internal::IsAligned(), kCheckSumOffset, kHeaderSize, v8::internal::kInt32Size, v8::internal::SerializerDeserializer::kNumberOfSpaces, kNumCodeStubKeysOffset, kPayloadLengthOffset, v8::internal::kPointerAlignment, kReservationsOffset, v8::internal::NEW_SPACE, script_data_, SetHeaderValue(), and v8::internal::STATIC_ASSERT().

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◆ ~SerializedCodeData()

v8::internal::SerializedCodeData::~SerializedCodeData ( )
inline

Definition at line 640 of file serialize.h.

640  {
641  if (owns_script_data_) delete script_data_;
642  }

References owns_script_data_, and script_data_.

Member Function Documentation

◆ CheckSum()

int v8::internal::SerializedCodeData::CheckSum ( String *  source)
private

Definition at line 2109 of file serialize.cc.

2109  {
2110  int checksum = Version::Hash();
2111 #ifdef DEBUG
2112  uint32_t seed = static_cast<uint32_t>(checksum);
2113  checksum = static_cast<int>(IteratingStringHasher::Hash(string, seed));
2114 #endif // DEBUG
2115  return checksum;
2116 }
uint32_t
v8::internal::IteratingStringHasher::Hash
static uint32_t Hash(String *string, uint32_t seed)
Definition: objects-inl.h:6572
v8::internal::Version::Hash
static int Hash()
Definition: version.h:19

References v8::internal::Version::Hash(), and v8::internal::IteratingStringHasher::Hash().

Referenced by IsSane(), and SerializedCodeData().

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◆ CodeStubKeys()

Vector<const uint32_t> v8::internal::SerializedCodeData::CodeStubKeys ( ) const
inline

Definition at line 653 of file serialize.h.

653  {
654  return Vector<const uint32_t>(
655  reinterpret_cast<const uint32_t*>(script_data_->data() + kHeaderSize),
656  GetHeaderValue(kNumCodeStubKeysOffset));
657  }
v8::internal::ScriptData::data
const byte * data() const
Definition: compiler.h:40
v8::internal::SerializedCodeData::GetHeaderValue
int GetHeaderValue(int offset) const
Definition: serialize.h:681

References v8::internal::ScriptData::data(), GetHeaderValue(), kHeaderSize, kNumCodeStubKeysOffset, and script_data_.

Referenced by v8::internal::CodeSerializer::Deserialize().

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◆ GetHeaderValue()

int v8::internal::SerializedCodeData::GetHeaderValue ( int  offset) const
inlineprivate

Definition at line 681 of file serialize.h.

681  {
682  return reinterpret_cast<const int*>(script_data_->data())[offset];
683  }

References v8::internal::ScriptData::data(), and script_data_.

Referenced by CodeStubKeys(), GetReservation(), IsSane(), Payload(), and PayloadLength().

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◆ GetReservation()

int v8::internal::SerializedCodeData::GetReservation ( int  space) const
inline

Definition at line 671 of file serialize.h.

671  {
672  return GetHeaderValue(kReservationsOffset + space);
673  }
space
enable harmony numeric enable harmony object literal extensions Optimize object Array DOM strings and string trace pretenuring decisions of HAllocate instructions Enables optimizations which favor memory size over execution speed maximum source size in bytes considered for a single inlining maximum cumulative number of AST nodes considered for inlining trace the tracking of allocation sites deoptimize every n garbage collections perform array bounds checks elimination analyze liveness of environment slots and zap dead values flushes the cache of optimized code for closures on every GC allow uint32 values on optimize frames if they are used only in safe operations track concurrent recompilation artificial compilation delay in ms do not emit check maps for constant values that have a leaf deoptimize the optimized code if the layout of the maps changes enable context specialization in TurboFan execution budget before interrupt is triggered max percentage of megamorphic generic ICs to allow optimization enable use of SAHF instruction if enable use of VFP3 instructions if available enable use of NEON instructions if enable use of SDIV and UDIV instructions if enable use of MLS instructions if enable loading bit constant by means of movw movt instruction enable unaligned accesses for enable use of d16 d31 registers on ARM this requires VFP3 force all emitted branches to be in long enable alignment of csp to bytes on platforms which prefer the register to always be expose gc extension under the specified name show built in functions in stack traces use random jit cookie to mask large constants minimum length for automatic enable preparsing CPU profiler sampling interval in microseconds trace out of bounds accesses to external arrays default size of stack region v8 is allowed to maximum length of function source code printed in a stack trace min size of a semi space(in MBytes)

References GetHeaderValue(), kReservationsOffset, and space().

Referenced by v8::internal::CodeSerializer::Deserialize().

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◆ GetScriptData()

ScriptData* v8::internal::SerializedCodeData::GetScriptData ( )
inline

Definition at line 645 of file serialize.h.

645  {
646  ScriptData* result = script_data_;
647  script_data_ = NULL;
648  DCHECK(owns_script_data_);
649  owns_script_data_ = false;
650  return result;
651  }
NULL
enable harmony numeric enable harmony object literal extensions Optimize object Array DOM strings and string trace pretenuring decisions of HAllocate instructions Enables optimizations which favor memory size over execution speed maximum source size in bytes considered for a single inlining maximum cumulative number of AST nodes considered for inlining trace the tracking of allocation sites deoptimize every n garbage collections perform array bounds checks elimination analyze liveness of environment slots and zap dead values flushes the cache of optimized code for closures on every GC allow uint32 values on optimize frames if they are used only in safe operations track concurrent recompilation artificial compilation delay in ms do not emit check maps for constant values that have a leaf deoptimize the optimized code if the layout of the maps changes enable context specialization in TurboFan execution budget before interrupt is triggered max percentage of megamorphic generic ICs to allow optimization enable use of SAHF instruction if enable use of VFP3 instructions if available enable use of NEON instructions if enable use of SDIV and UDIV instructions if enable use of MLS instructions if enable loading bit constant by means of movw movt instruction enable unaligned accesses for enable use of d16 d31 registers on ARM this requires VFP3 force all emitted branches to be in long enable alignment of csp to bytes on platforms which prefer the register to always be NULL
Definition: flag-definitions.h:407

References DCHECK, NULL, owns_script_data_, and script_data_.

Referenced by v8::internal::CodeSerializer::Serialize().

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◆ IsSane()

bool v8::internal::SerializedCodeData::IsSane ( String *  source)
private

Definition at line 2103 of file serialize.cc.

2103  {
2104  return GetHeaderValue(kCheckSumOffset) == CheckSum(source) &&
2105  PayloadLength() >= SharedFunctionInfo::kSize;
2106 }

References CheckSum(), GetHeaderValue(), kCheckSumOffset, v8::internal::SharedFunctionInfo::kSize, and PayloadLength().

Referenced by SerializedCodeData().

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◆ Payload()

const byte* v8::internal::SerializedCodeData::Payload ( ) const
inline

Definition at line 659 of file serialize.h.

659  {
660  int code_stubs_size = GetHeaderValue(kNumCodeStubKeysOffset) * kInt32Size;
661  return script_data_->data() + kHeaderSize + code_stubs_size;
662  }

References v8::internal::ScriptData::data(), GetHeaderValue(), kHeaderSize, v8::internal::kInt32Size, kNumCodeStubKeysOffset, and script_data_.

Referenced by v8::internal::CodeSerializer::Deserialize(), and PayloadLength().

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◆ PayloadLength()

int v8::internal::SerializedCodeData::PayloadLength ( ) const
inline

Definition at line 664 of file serialize.h.

664  {
665  int payload_length = GetHeaderValue(kPayloadLengthOffset);
666  DCHECK_EQ(script_data_->data() + script_data_->length(),
667  Payload() + payload_length);
668  return payload_length;
669  }
v8::internal::ScriptData::length
int length() const
Definition: compiler.h:41
v8::internal::SerializedCodeData::Payload
const byte * Payload() const
Definition: serialize.h:659
DCHECK_EQ
#define DCHECK_EQ(v1, v2)
Definition: logging.h:206

References v8::internal::ScriptData::data(), DCHECK_EQ, GetHeaderValue(), kPayloadLengthOffset, v8::internal::ScriptData::length(), Payload(), and script_data_.

Referenced by v8::internal::CodeSerializer::Deserialize(), and IsSane().

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◆ SetHeaderValue()

void v8::internal::SerializedCodeData::SetHeaderValue ( int  offset,
int  value 
)
inlineprivate

Definition at line 676 of file serialize.h.

676  {
677  reinterpret_cast<int*>(const_cast<byte*>(script_data_->data()))[offset] =
678  value;
679  }

References v8::internal::ScriptData::data(), and script_data_.

Referenced by SerializedCodeData().

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Member Data Documentation

◆ kCheckSumOffset

const int v8::internal::SerializedCodeData::kCheckSumOffset = 0
staticprivate

Definition at line 694 of file serialize.h.

Referenced by IsSane(), and SerializedCodeData().

◆ kHeaderEntries

const int v8::internal::SerializedCodeData::kHeaderEntries
staticprivate
Initial value:
=
kReservationsOffset + SerializerDeserializer::kNumberOfSpaces

Definition at line 699 of file serialize.h.

◆ kHeaderSize

const int v8::internal::SerializedCodeData::kHeaderSize = kHeaderEntries * kIntSize
staticprivate

Definition at line 701 of file serialize.h.

Referenced by CodeStubKeys(), Payload(), and SerializedCodeData().

◆ kNumCodeStubKeysOffset

const int v8::internal::SerializedCodeData::kNumCodeStubKeysOffset = 1
staticprivate

Definition at line 695 of file serialize.h.

Referenced by CodeStubKeys(), Payload(), and SerializedCodeData().

◆ kPayloadLengthOffset

const int v8::internal::SerializedCodeData::kPayloadLengthOffset = 2
staticprivate

Definition at line 696 of file serialize.h.

Referenced by PayloadLength(), and SerializedCodeData().

◆ kReservationsOffset

const int v8::internal::SerializedCodeData::kReservationsOffset = 3
staticprivate

Definition at line 697 of file serialize.h.

Referenced by GetReservation(), and SerializedCodeData().

◆ owns_script_data_

bool v8::internal::SerializedCodeData::owns_script_data_
private

Definition at line 708 of file serialize.h.

Referenced by GetScriptData(), and ~SerializedCodeData().

◆ script_data_

ScriptData* v8::internal::SerializedCodeData::script_data_
private

Definition at line 707 of file serialize.h.

Referenced by CodeStubKeys(), GetHeaderValue(), GetScriptData(), Payload(), PayloadLength(), SerializedCodeData(), SetHeaderValue(), and ~SerializedCodeData().

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