#include <frames.h>

Inheritance diagram for v8::internal::OptimizedFrame:

Collaboration diagram for v8::internal::OptimizedFrame:

Public Member Functions
virtual Type	type () const

virtual void	Iterate (ObjectVisitor *v) const

virtual int	GetInlineCount ()

virtual void	GetFunctions (List< JSFunction * > *functions)

virtual void	Summarize (List< FrameSummary > *frames)

DeoptimizationInputData *	GetDeoptimizationData (int *deopt_index)

Public Member Functions inherited from v8::internal::JavaScriptFrame
JSFunction *	function () const

Object *	receiver () const

void	set_receiver (Object *value)

Address	GetParameterSlot (int index) const

Object *	GetParameter (int index) const

int	ComputeParametersCount () const

Address	GetOperandSlot (int index) const

Object *	GetOperand (int index) const

int	ComputeOperandsCount () const

void	SaveOperandStack (FixedArray store, int stack_handler_index) const

void	RestoreOperandStack (FixedArray *store, int stack_handler_index)

void	SetParameterValue (int index, Object *value) const

bool	IsConstructor () const

bool	has_adapted_arguments () const

int	GetArgumentsLength () const

virtual void	Print (StringStream *accumulator, PrintMode mode, int index) const

virtual Code *	unchecked_code () const

Public Member Functions inherited from v8::internal::StandardFrame
virtual bool	is_standard () const

Object *	context () const

Object *	GetExpression (int index) const

void	SetExpression (int index, Object *value)

int	ComputeExpressionsCount () const

virtual void	SetCallerFp (Address caller_fp)

Public Member Functions inherited from v8::StackFrame
int	GetLineNumber () const
	Returns the number, 1-based, of the line for the associate function call. More...

int	GetColumn () const
	Returns the 1-based column offset on the line for the associated function call. More...

int	GetScriptId () const
	Returns the id of the script for the function for this StackFrame. More...

Local< String >	GetScriptName () const
	Returns the name of the resource that contains the script for the function for this StackFrame. More...

Local< String >	GetScriptNameOrSourceURL () const
	Returns the name of the resource that contains the script for the function for this StackFrame or sourceURL value if the script name is undefined and its source ends with //# sourceURL=... More...

Local< String >	GetFunctionName () const
	Returns the name of the function associated with this stack frame. More...

bool	IsEval () const
	Returns whether or not the associated function is compiled via a call to eval(). More...

bool	IsConstructor () const
	Returns whether or not the associated function is called as a constructor via "new". More...

Protected Member Functions
	OptimizedFrame (StackFrameIteratorBase *iterator)

Protected Member Functions inherited from v8::internal::JavaScriptFrame
	JavaScriptFrame (StackFrameIteratorBase *iterator)

virtual Address	GetCallerStackPointer () const

virtual int	GetNumberOfIncomingArguments () const

void	IterateArguments (ObjectVisitor *v) const

Protected Member Functions inherited from v8::internal::StandardFrame
	StandardFrame (StackFrameIteratorBase *iterator)

virtual void	ComputeCallerState (State *state) const

Address	caller_fp () const

Address	caller_pc () const

void	IterateExpressions (ObjectVisitor *v) const

Address	GetExpressionAddress (int n) const

bool	IsExpressionInsideHandler (int n) const

void	IterateCompiledFrame (ObjectVisitor *v) const

Private Member Functions
JSFunction *	LiteralAt (FixedArray *literal_array, int literal_id)

Friends
class	StackFrameIteratorBase

Additional Inherited Members
Static Public Member Functions inherited from v8::internal::JavaScriptFrame
static Register	fp_register ()

static Register	context_register ()

static Register	constant_pool_pointer_register ()

static JavaScriptFrame *	cast (StackFrame *frame)

static void	PrintFunctionAndOffset (JSFunction function, Code code, Address pc, FILE *file, bool print_line_number)

static void	PrintTop (Isolate isolate, FILE file, bool print_args, bool print_line_number)

Static Public Member Functions inherited from v8::internal::StandardFrame
static Object *	GetExpression (Address fp, int index)

static StandardFrame *	cast (StackFrame *frame)

Static Protected Member Functions inherited from v8::internal::StandardFrame
static Address	ComputePCAddress (Address fp)

static Address	ComputeConstantPoolAddress (Address fp)

static Address	GetExpressionAddress (Address fp, int n)

static bool	IsArgumentsAdaptorFrame (Address fp)

static bool	IsConstructFrame (Address fp)

Detailed Description

Definition at line 663 of file frames.h.

Constructor & Destructor Documentation

◆ OptimizedFrame()

v8::internal::OptimizedFrame::OptimizedFrame ( StackFrameIteratorBase * iterator )

inlineexplicitprotected

Definition at line 275 of file frames-inl.h.

276 : JavaScriptFrame(iterator) {

277 }

v8::internal::JavaScriptFrame::JavaScriptFrame

JavaScriptFrame(StackFrameIteratorBase *iterator)

Definition: frames-inl.h:204

Member Function Documentation

◆ GetDeoptimizationData()

DeoptimizationInputData * v8::internal::OptimizedFrame::GetDeoptimizationData ( int * deopt_index )

Definition at line 1034 of file frames.cc.

                       {
   DCHECK(is_optimized());
  
   JSFunction* opt_function = function();
   Code* code = opt_function->code();
  
   // The code object may have been replaced by lazy deoptimization. Fall
   // back to a slow search in this case to find the original optimized
   // code object.
   if (!code->contains(pc())) {
     code = isolate()->inner_pointer_to_code_cache()->
         GcSafeFindCodeForInnerPointer(pc());
   }
   DCHECK(code != NULL);
   DCHECK(code->kind() == Code::OPTIMIZED_FUNCTION);
  
   SafepointEntry safepoint_entry = code->GetSafepointEntry(pc());
   *deopt_index = safepoint_entry.deoptimization_index();
   DCHECK(*deopt_index != Safepoint::kNoDeoptimizationIndex);
  
   return DeoptimizationInputData::cast(code->deoptimization_data());
 }

References v8::internal::JSFunction::code(), v8::internal::Code::contains(), DCHECK, v8::internal::Code::GetSafepointEntry(), v8::internal::Isolate::inner_pointer_to_code_cache(), v8::internal::Code::kind(), NULL, and v8::internal::pc.

Referenced by GetFunctions(), GetInlineCount(), and Summarize().

Here is the call graph for this function:

Here is the caller graph for this function:

◆ GetFunctions()

void v8::internal::OptimizedFrame::GetFunctions ( List< JSFunction * > * functions )

virtual

Reimplemented from v8::internal::JavaScriptFrame.

Definition at line 1082 of file frames.cc.

                                                               {
   DCHECK(functions->length() == 0);
   DCHECK(is_optimized());
  
   // Delegate to JS frame in absence of turbofan deoptimization.
   // TODO(turbofan): Revisit once we support deoptimization across the board.
   if (LookupCode()->is_turbofanned() && !FLAG_turbo_deoptimization) {
     return JavaScriptFrame::GetFunctions(functions);
   }
  
   int deopt_index = Safepoint::kNoDeoptimizationIndex;
   DeoptimizationInputData* data = GetDeoptimizationData(&deopt_index);
   FixedArray* literal_array = data->LiteralArray();
  
   TranslationIterator it(data->TranslationByteArray(),
                          data->TranslationIndex(deopt_index)->value());
   Translation::Opcode opcode = static_cast<Translation::Opcode>(it.Next());
   DCHECK(opcode == Translation::BEGIN);
   it.Next();  // Drop frame count.
   int jsframe_count = it.Next();
  
   // We insert the frames in reverse order because the frames
   // in the deoptimization translation are ordered bottom-to-top.
   while (jsframe_count > 0) {
     opcode = static_cast<Translation::Opcode>(it.Next());
     if (opcode == Translation::JS_FRAME) {
       jsframe_count--;
       it.Next();  // Skip ast id.
       JSFunction* function = LiteralAt(literal_array, it.Next());
       it.Next();  // Skip height.
       functions->Add(function);
     } else {
       // Skip over operands to advance to the next opcode.
       it.Skip(Translation::NumberOfOperandsFor(opcode));
     }
   }
 }

References v8::internal::List< T, AllocationPolicy >::Add(), DCHECK, GetDeoptimizationData(), v8::internal::JavaScriptFrame::GetFunctions(), v8::internal::compiler::JS_FRAME, and LiteralAt().

Here is the call graph for this function:

◆ GetInlineCount()

int v8::internal::OptimizedFrame::GetInlineCount ( )

virtual

Reimplemented from v8::internal::JavaScriptFrame.

Definition at line 1059 of file frames.cc.

                                    {
   DCHECK(is_optimized());
  
   // Delegate to JS frame in absence of turbofan deoptimization.
   // TODO(turbofan): Revisit once we support deoptimization across the board.
   if (LookupCode()->is_turbofanned() && !FLAG_turbo_deoptimization) {
     return JavaScriptFrame::GetInlineCount();
   }
  
   int deopt_index = Safepoint::kNoDeoptimizationIndex;
   DeoptimizationInputData* data = GetDeoptimizationData(&deopt_index);
  
   TranslationIterator it(data->TranslationByteArray(),
                          data->TranslationIndex(deopt_index)->value());
   Translation::Opcode opcode = static_cast<Translation::Opcode>(it.Next());
   DCHECK(opcode == Translation::BEGIN);
   USE(opcode);
   it.Next();  // Drop frame count.
   int jsframe_count = it.Next();
   return jsframe_count;
 }

References DCHECK, GetDeoptimizationData(), v8::internal::JavaScriptFrame::GetInlineCount(), and USE().

Here is the call graph for this function:

◆ Iterate()

void v8::internal::OptimizedFrame::Iterate ( ObjectVisitor * v ) const

virtual

Reimplemented from v8::internal::JavaScriptFrame.

Definition at line 708 of file frames.cc.

                                                    {
 #ifdef DEBUG
   // Make sure that optimized frames do not contain any stack handlers.
   StackHandlerIterator it(this, top_handler());
   DCHECK(it.done());
 #endif
  
   IterateCompiledFrame(v);
 }

References DCHECK, and v8::internal::StandardFrame::IterateCompiledFrame().

Here is the call graph for this function:

◆ LiteralAt()

JSFunction * v8::internal::OptimizedFrame::LiteralAt	(	FixedArray *	literal_array,
		int	literal_id
	)

private

Definition at line 921 of file frames.cc.

                                                       {
   if (literal_id == Translation::kSelfLiteralId) {
     return function();
   }
  
   return JSFunction::cast(literal_array->get(literal_id));
 }

References v8::internal::FixedArray::get().

Referenced by GetFunctions(), and Summarize().

Here is the call graph for this function:

Here is the caller graph for this function:

◆ Summarize()

void v8::internal::OptimizedFrame::Summarize ( List< FrameSummary > * frames )

virtual

Reimplemented from v8::internal::JavaScriptFrame.

Definition at line 931 of file frames.cc.

                                                          {
   DCHECK(frames->length() == 0);
   DCHECK(is_optimized());
  
   // Delegate to JS frame in absence of turbofan deoptimization.
   // TODO(turbofan): Revisit once we support deoptimization across the board.
   if (LookupCode()->is_turbofanned() && !FLAG_turbo_deoptimization) {
     return JavaScriptFrame::Summarize(frames);
   }
  
   int deopt_index = Safepoint::kNoDeoptimizationIndex;
   DeoptimizationInputData* data = GetDeoptimizationData(&deopt_index);
   FixedArray* literal_array = data->LiteralArray();
  
   // BUG(3243555): Since we don't have a lazy-deopt registered at
   // throw-statements, we can't use the translation at the call-site of
   // throw. An entry with no deoptimization index indicates a call-site
   // without a lazy-deopt. As a consequence we are not allowed to inline
   // functions containing throw.
   DCHECK(deopt_index != Safepoint::kNoDeoptimizationIndex);
  
   TranslationIterator it(data->TranslationByteArray(),
                          data->TranslationIndex(deopt_index)->value());
   Translation::Opcode opcode = static_cast<Translation::Opcode>(it.Next());
   DCHECK(opcode == Translation::BEGIN);
   it.Next();  // Drop frame count.
   int jsframe_count = it.Next();
  
   // We create the summary in reverse order because the frames
   // in the deoptimization translation are ordered bottom-to-top.
   bool is_constructor = IsConstructor();
   int i = jsframe_count;
   while (i > 0) {
     opcode = static_cast<Translation::Opcode>(it.Next());
     if (opcode == Translation::JS_FRAME) {
       i--;
       BailoutId ast_id = BailoutId(it.Next());
       JSFunction* function = LiteralAt(literal_array, it.Next());
       it.Next();  // Skip height.
  
       // The translation commands are ordered and the receiver is always
       // at the first position.
       // If we are at a call, the receiver is always in a stack slot.
       // Otherwise we are not guaranteed to get the receiver value.
       opcode = static_cast<Translation::Opcode>(it.Next());
       int index = it.Next();
  
       // Get the correct receiver in the optimized frame.
       Object* receiver = NULL;
       if (opcode == Translation::LITERAL) {
         receiver = data->LiteralArray()->get(index);
       } else if (opcode == Translation::STACK_SLOT) {
         // Positive index means the value is spilled to the locals
         // area. Negative means it is stored in the incoming parameter
         // area.
         if (index >= 0) {
           receiver = GetExpression(index);
         } else {
           // Index -1 overlaps with last parameter, -n with the first parameter,
           // (-n - 1) with the receiver with n being the number of parameters
           // of the outermost, optimized frame.
           int parameter_count = ComputeParametersCount();
           int parameter_index = index + parameter_count;
           receiver = (parameter_index == -1)
               ? this->receiver()
               : this->GetParameter(parameter_index);
         }
       } else {
         // The receiver is not in a stack slot nor in a literal.  We give up.
         // TODO(3029): Materializing a captured object (or duplicated
         // object) is hard, we return undefined for now. This breaks the
         // produced stack trace, as constructor frames aren't marked as
         // such anymore.
         receiver = isolate()->heap()->undefined_value();
       }
  
       Code* code = function->shared()->code();
       DeoptimizationOutputData* output_data =
           DeoptimizationOutputData::cast(code->deoptimization_data());
       unsigned entry = Deoptimizer::GetOutputInfo(output_data,
                                                   ast_id,
                                                   function->shared());
       unsigned pc_offset =
           FullCodeGenerator::PcField::decode(entry) + Code::kHeaderSize;
       DCHECK(pc_offset > 0);
  
       FrameSummary summary(receiver, function, code, pc_offset, is_constructor);
       frames->Add(summary);
       is_constructor = false;
     } else if (opcode == Translation::CONSTRUCT_STUB_FRAME) {
       // The next encountered JS_FRAME will be marked as a constructor call.
       it.Skip(Translation::NumberOfOperandsFor(opcode));
       DCHECK(!is_constructor);
       is_constructor = true;
     } else {
       // Skip over operands to advance to the next opcode.
       it.Skip(Translation::NumberOfOperandsFor(opcode));
     }
   }
   DCHECK(!is_constructor);
 }

References v8::internal::List< T, AllocationPolicy >::Add(), v8::internal::JavaScriptFrame::ComputeParametersCount(), DCHECK, v8::internal::BitFieldBase< T, shift, size, U >::decode(), v8::internal::JavaScriptFrame::function(), v8::internal::FixedArray::get(), GetDeoptimizationData(), v8::internal::StandardFrame::GetExpression(), v8::internal::Deoptimizer::GetOutputInfo(), v8::internal::JavaScriptFrame::GetParameter(), v8::internal::Isolate::heap(), v8::internal::JavaScriptFrame::IsConstructor(), v8::internal::compiler::JS_FRAME, v8::internal::Code::kHeaderSize, LiteralAt(), NULL, v8::internal::JavaScriptFrame::receiver(), and v8::internal::JavaScriptFrame::Summarize().

Here is the call graph for this function:

◆ type()

virtual Type v8::internal::OptimizedFrame::type ( ) const

inlinevirtual

Reimplemented from v8::internal::JavaScriptFrame.

Definition at line 665 of file frames.h.

665 { return OPTIMIZED; }

Friends And Related Function Documentation

◆ StackFrameIteratorBase

friend class StackFrameIteratorBase

friend

Definition at line 687 of file frames.h.

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

/mnt/V8SourceCode/src/frames.h
/mnt/V8SourceCode/src/frames-inl.h
/mnt/V8SourceCode/src/frames.cc

Public Member Functions

Protected Member Functions

Private Member Functions

Friends

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

◆ OptimizedFrame()

Member Function Documentation

◆ GetDeoptimizationData()

◆ GetFunctions()

◆ GetInlineCount()

◆ Iterate()

◆ LiteralAt()

◆ Summarize()

◆ type()

Friends And Related Function Documentation

◆ StackFrameIteratorBase