clang::interp::InterpFrame Class Reference

Frame storing local variables. More...

#include "/work/as-worker-4/publish-doxygen-docs/llvm-project/clang/lib/AST/ByteCode/InterpFrame.h"

Inheritance diagram for clang::interp::InterpFrame:

Public Member Functions
	InterpFrame (InterpState &S)
	Bottom Frame.
	InterpFrame (InterpState &S, const Function *Func, InterpFrame *Caller, CodePtr RetPC, unsigned ArgSize)
	Creates a new frame for a method call.
	InterpFrame (InterpState &S, const Function *Func, CodePtr RetPC, unsigned VarArgSize=0)
	Creates a new frame with the values that make sense.
	~InterpFrame ()
	Destroys the frame, killing all live pointers to stack slots.
std::string	getName () const
void	destroy (unsigned Idx)
	Invokes the destructors for a scope.
void	initScope (unsigned Idx)
void	destroyScopes ()
void	enableLocal (unsigned Idx)
bool	isLocalEnabled (unsigned Idx) const
void	describe (llvm::raw_ostream &OS) const override
	Describes the frame with arguments for diagnostic purposes.
Frame *	getCaller () const override
	Returns the parent frame object.
SourceRange	getCallRange () const override
	Returns the location of the call to the frame.
const FunctionDecl *	getCallee () const override
	Returns the caller.
const Function *	getFunction () const
	Returns the current function.
size_t	getFrameOffset () const
	Returns the offset on the stack at which the frame starts.
template<typename T>
const T &	getLocal (unsigned Offset) const
	Returns the value of a local variable.
template<typename T>
void	setLocal (unsigned Offset, const T &Value)
	Mutates a local variable.
Pointer	getLocalPointer (unsigned Offset) const
	Returns a pointer to a local variables.
Block *	getLocalBlock (unsigned Offset) const
template<typename T>
const T &	getParam (unsigned Index) const
	Returns the value of an argument.
template<typename T>
void	setParam (unsigned Index, const T &Value)
	Mutates a local copy of a parameter.
Pointer	getParamPointer (unsigned Offset)
	Returns a pointer to an argument - lazily creates a block.
bool	hasThisPointer () const
const Pointer &	getThis () const
	Returns the 'this' pointer.
const Pointer &	getRVOPtr () const
	Returns the RVO pointer, if the Function has one.
bool	isRoot () const
	Checks if the frame is a root frame - return should quit the interpreter.
CodePtr	getPC () const
	Returns the PC of the frame's code start.
CodePtr	getRetPC () const
	Returns the return address of the frame.
SourceInfo	getSource (CodePtr PC) const
	Map a location to a source.
const Expr *	getExpr (CodePtr PC) const
SourceLocation	getLocation (CodePtr PC) const
SourceRange	getRange (CodePtr PC) const
unsigned	getDepth () const
bool	isStdFunction () const
bool	isBottomFrame () const
void	dump () const
void	dump (llvm::raw_ostream &OS, unsigned Indent=0) const
Public Member Functions inherited from clang::interp::Frame
virtual	~Frame ()=default

Static Public Member Functions
static size_t	allocSize (const Function *F)
	Returns the number of bytes needed to allocate an InterpFrame for the given function.
static void	free (InterpFrame *F)

Public Attributes
InterpFrame *	Caller
	The frame of the previous function.
unsigned	MSVCConstexprAllowed = 0

Detailed Description

Frame storing local variables.

Definition at line 27 of file InterpFrame.h.

Constructor & Destructor Documentation

InterpFrame() [1/3]

InterpFrame::InterpFrame

(

InterpState &

S

)

Bottom Frame.

Definition at line 25 of file InterpFrame.cpp.

References Caller, and clang::nullptr.

Referenced by allocSize(), dump(), free(), getCallRange(), InterpFrame(), and InterpFrame().

InterpFrame() [2/3]

InterpFrame::InterpFrame	(	InterpState &	S,
		const Function *	Func,
		InterpFrame *	Caller,
		CodePtr	RetPC,
		unsigned	ArgSize )

Creates a new frame for a method call.

Definition at line 29 of file InterpFrame.cpp.

References clang::interp::Block, Caller, clang::for(), clang::if(), and InterpFrame().

InterpFrame() [3/3]

InterpFrame::InterpFrame	(	InterpState &	S,
		const Function *	Func,
		CodePtr	RetPC,
		unsigned	VarArgSize = 0 )

Creates a new frame with the values that make sense.

I.e., the caller is the current frame of S, the This() pointer is the current Pointer on the top of S's stack, and the RVO pointer is before that.

Definition at line 54 of file InterpFrame.cpp.

References clang::if(), and InterpFrame().

~InterpFrame()

InterpFrame::~InterpFrame

(

)

Destroys the frame, killing all live pointers to stack slots.

Definition at line 71 of file InterpFrame.cpp.

References destroyScopes().

Referenced by free().

Member Function Documentation

allocSize()

size_t clang::interp::InterpFrame::allocSize ( const Function * F )

inlinestatic

Returns the number of bytes needed to allocate an InterpFrame for the given function.

Definition at line 51 of file InterpFrame.h.

References clang::interp::Function::getArgSize(), clang::interp::Function::getFrameSize(), clang::interp::Function::getNumWrittenParams(), and InterpFrame().

Referenced by clang::interp::Call(), and clang::interp::CallVar().

describe()

void InterpFrame::describe ( llvm::raw_ostream & OS ) const

overridevirtual

Describes the frame with arguments for diagnostic purposes.

Implements clang::interp::Frame.

Definition at line 159 of file InterpFrame.cpp.

References clang::interp::align(), Caller, getCallee(), clang::FunctionDecl::getNameForDiagnostic(), getRetPC(), getThis(), clang::isa(), clang::FunctionDecl::parameters(), clang::interp::primSize(), print(), clang::interp::PT_Ptr, shouldSkipInBacktrace(), and TYPE_SWITCH.

Referenced by dump().

destroy()

void InterpFrame::destroy

(

unsigned

Idx

)

Invokes the destructors for a scope.

Definition at line 115 of file InterpFrame.cpp.

Referenced by clang::interp::Destroy().

destroyScopes()

void InterpFrame::destroyScopes

(

)

Definition at line 85 of file InterpFrame.cpp.

References clang::interp::Scope::locals().

Referenced by ~InterpFrame().

dump() [1/2]

void clang::interp::InterpFrame::dump ( ) const

inline

Definition at line 167 of file InterpFrame.h.

References dump().

Referenced by dump().

dump() [2/2]

LLVM_DUMP_METHOD void InterpFrame::dump	(	llvm::raw_ostream &	OS,
		unsigned	Indent = 0 ) const

Definition at line 504 of file Disasm.cpp.

References Caller, describe(), clang::ast_matchers::getCallee(), getDepth(), getFunction(), getRVOPtr(), getThis(), hasThisPointer(), clang::Indent(), and InterpFrame().

enableLocal()

void InterpFrame::enableLocal

(

unsigned

Idx

)

Definition at line 104 of file InterpFrame.cpp.

Referenced by clang::interp::EnableLocal().

free()

void clang::interp::InterpFrame::free ( InterpFrame * F )

inlinestatic

Definition at line 62 of file InterpFrame.h.

References InterpFrame(), isBottomFrame(), and ~InterpFrame().

Referenced by clang::interp::Call(), clang::interp::CallVar(), clang::interp::Ret(), and clang::interp::RetVoid().

getCallee()

const FunctionDecl * InterpFrame::getCallee ( ) const

overridevirtual

Returns the caller.

Implements clang::interp::Frame.

Definition at line 238 of file InterpFrame.cpp.

Referenced by describe(), clang::interp::interp__builtin_is_within_lifetime(), and clang::interp::NoRet().

getCaller()

Frame * clang::interp::InterpFrame::getCaller ( ) const

inlineoverridevirtual

Returns the parent frame object.

Implements clang::interp::Frame.

Definition at line 84 of file InterpFrame.h.

References Caller.

getCallRange()

SourceRange InterpFrame::getCallRange ( ) const

overridevirtual

Returns the location of the call to the frame.

Implements clang::interp::Frame.

Definition at line 219 of file InterpFrame.cpp.

References clang::C, Caller, InterpFrame(), and clang::SourceRange::isValid().

getDepth()

unsigned clang::interp::InterpFrame::getDepth ( ) const

inline

Definition at line 161 of file InterpFrame.h.

Referenced by clang::interp::CheckCallable(), clang::interp::CheckCallDepth(), clang::interp::CheckFunctionDecl(), dump(), clang::interp::GetPtrThisField(), clang::interp::InitThisBitField(), clang::interp::InitThisBitFieldActivate(), clang::interp::InitThisField(), clang::interp::InitThisFieldActivate(), and clang::interp::interp__builtin_is_constant_evaluated().

getExpr()

const Expr * InterpFrame::getExpr

(

CodePtr

PC

)

const

Definition at line 294 of file InterpFrame.cpp.

References Caller, and funcHasUsableBody().

Referenced by clang::interp::AddSubMulHelper(), clang::interp::CallVirt(), clang::interp::CastFloatingIntegral(), clang::interp::CheckBitCast(), clang::interp::CheckBitCast(), CheckBitcastType(), clang::interp::CheckDivRem(), clang::interp::CheckDowncast(), clang::interp::CheckLiteralType(), clang::interp::CheckShift(), clang::interp::CheckThis(), clang::interp::cleanupAfterFunctionCall(), clang::interp::DiagTypeid(), clang::interp::DoBitCastPtr(), clang::interp::GetDynamicDecl(), clang::interp::handleFixedPointOverflow(), clang::interp::handleOverflow(), clang::interp::IncDecHelper(), clang::interp::interp__builtin_is_constant_evaluated(), clang::interp::InvalidCast(), clang::interp::Neg(), clang::interp::PtrPtrCast(), clang::interp::ShiftFixedPoint(), and clang::interp::SizelessVectorElementSize().

getFrameOffset()

size_t clang::interp::InterpFrame::getFrameOffset ( ) const

inline

Returns the offset on the stack at which the frame starts.

Definition at line 96 of file InterpFrame.h.

Referenced by clang::interp::Ret(), and clang::interp::RetVoid().

getFunction()

const Function * clang::interp::InterpFrame::getFunction ( ) const

inline

Returns the current function.

Definition at line 93 of file InterpFrame.h.

Referenced by clang::interp::Call(), clang::interp::CallVar(), clang::interp::CheckLiteralType(), clang::interp::Destroy(), dump(), clang::interp::GetTypeidPtr(), clang::interp::Ret(), clang::interp::RetVoid(), clang::interp::runRecordDestructor(), clang::interp::RVOPtr(), and clang::interp::This().

getLocal()

template<typename T>

const T & clang::interp::InterpFrame::getLocal ( unsigned Offset ) const

inline

Returns the value of a local variable.

Definition at line 99 of file InterpFrame.h.

getLocalBlock()

Block * InterpFrame::getLocalBlock

(

unsigned

Offset

)

const

Definition at line 249 of file InterpFrame.cpp.

Referenced by clang::interp::Destroy(), and clang::interp::GetLocal().

getLocalPointer()

Pointer InterpFrame::getLocalPointer

(

unsigned

Offset

)

const

Returns a pointer to a local variables.

Definition at line 244 of file InterpFrame.cpp.

References Pointer.

Referenced by clang::interp::Destroy(), and clang::interp::GetPtrLocal().

getLocation()

SourceLocation InterpFrame::getLocation

(

CodePtr

PC

)

const

Definition at line 301 of file InterpFrame.cpp.

References Caller, and funcHasUsableBody().

Referenced by clang::interp::Assume(), clang::interp::CheckCallable(), clang::interp::CheckConstant(), clang::interp::checkConstructor(), CheckGlobal(), clang::interp::CheckGlobalLoad(), clang::interp::CheckLocalLoad(), clang::interp::CheckNewTypeMismatch(), clang::interp::CheckNonNullArg(), clang::interp::CheckNonNullArgs(), clang::interp::CheckVolatile(), clang::interp::CheckWeak(), clang::interp::diagnoseCallableDecl(), clang::interp::diagnoseEnumValue(), clang::interp::InterpretBuiltin(), clang::interp::Invalid(), clang::interp::InvalidCast(), clang::interp::ShiftFixedPoint(), and clang::interp::Unsupported().

getName()

std::string clang::interp::InterpFrame::getName ( ) const

inline

Definition at line 56 of file InterpFrame.h.

getParam()

template<typename T>

const T & clang::interp::InterpFrame::getParam ( unsigned Index ) const

inline

Returns the value of an argument.

Definition at line 114 of file InterpFrame.h.

References clang::interp::Block::deref(), and clang::interp::Block::isInitialized().

Referenced by clang::interp::GetParam().

getParamPointer()

Pointer InterpFrame::getParamPointer

(

unsigned

Offset

)

Returns a pointer to an argument - lazily creates a block.

Definition at line 253 of file InterpFrame.cpp.

References clang::interp::Block::data(), clang::interp::Block::getDescriptor(), clang::interp::Descriptor::getPrimType(), clang::interp::Block::invokeCtor(), isBottomFrame(), clang::interp::Block::isInitialized(), clang::interp::Descriptor::isPrimitive(), Pointer, and TYPE_SWITCH.

Referenced by clang::interp::GetPtrParam().

getPC()

CodePtr clang::interp::InterpFrame::getPC ( ) const

inline

Returns the PC of the frame's code start.

Definition at line 150 of file InterpFrame.h.

Referenced by clang::interp::Interpret().

getRange()

SourceRange InterpFrame::getRange

(

CodePtr

PC

)

const

Definition at line 308 of file InterpFrame.cpp.

References Caller, and funcHasUsableBody().

Referenced by clang::interp::CheckBitCast(), clang::interp::CheckFloatResult(), clang::interp::CheckLifetime(), clang::interp::CheckLive(), clang::interp::CheckNull(), clang::interp::CheckPointerToIntegralCast(), clang::interp::CheckRange(), clang::interp::CheckRange(), clang::interp::CheckSubobject(), clang::interp::DiagnoseUninitialized(), clang::interp::FnPtrCast(), clang::interp::InitElem(), clang::interp::InitElemPop(), clang::interp::InterpretBuiltin(), clang::interp::Invalid(), clang::interp::InvalidCast(), clang::interp::PtrPtrCast(), clang::interp::SizelessVectorElementSize(), and clang::interp::Unsupported().

getRetPC()

CodePtr clang::interp::InterpFrame::getRetPC ( ) const

inline

Returns the return address of the frame.

Definition at line 153 of file InterpFrame.h.

Referenced by clang::interp::cleanupAfterFunctionCall(), describe(), clang::interp::interp__builtin_is_constant_evaluated(), clang::interp::interp__builtin_is_within_lifetime(), clang::interp::Ret(), and clang::interp::RetVoid().

getRVOPtr()

const Pointer & clang::interp::InterpFrame::getRVOPtr ( ) const

inline

Returns the RVO pointer, if the Function has one.

Definition at line 139 of file InterpFrame.h.

References isBottomFrame().

Referenced by dump(), and clang::interp::RVOPtr().

getSource()

SourceInfo InterpFrame::getSource

(

CodePtr

PC

)

const

Map a location to a source.

Definition at line 280 of file InterpFrame.cpp.

References Caller, funcHasUsableBody(), and clang::Result.

Referenced by clang::interp::AllocN(), clang::interp::ArrayDecay(), clang::interp::BitCastPrim(), clang::interp::CallPtr(), clang::interp::CallVirt(), clang::interp::CheckActive(), clang::interp::CheckArray(), clang::interp::CheckArraySize(), clang::interp::CheckArraySize(), clang::interp::CheckBitCast(), clang::interp::CheckCallDepth(), clang::interp::CheckConst(), clang::interp::CheckDeleteSource(), clang::interp::CheckDestructor(), clang::interp::CheckDivRem(), clang::interp::CheckDummy(), clang::interp::CheckDynamicMemoryAllocation(), clang::interp::CheckFloatResult(), clang::interp::CheckLifetime(), clang::interp::CheckLive(), clang::interp::CheckLoad(), clang::interp::CheckMutable(), clang::interp::CheckNewDeleteForms(), clang::interp::CheckNewTypeMismatch(), clang::interp::CheckNull(), clang::interp::CheckNull(), clang::interp::CheckPointerToIntegralCast(), clang::interp::CheckPseudoDtor(), clang::interp::CheckRange(), clang::interp::CheckRange(), clang::interp::CheckShift(), clang::interp::CheckSubobject(), CheckTemporary(), clang::interp::CMP3(), clang::interp::CmpHelper< Pointer >(), clang::interp::CmpHelperEQ< MemberPointer >(), clang::interp::CmpHelperEQ< Pointer >(), diagnoseMissingInitializer(), clang::interp::diagnoseNonConstexprBuiltin(), diagnoseNonConstVariable(), clang::interp::DiagnoseUninitialized(), diagnoseUnknownDecl(), clang::interp::Divc(), clang::interp::DoShift(), clang::interp::DoShiftAP(), clang::interp::FnPtrCast(), clang::interp::Free(), clang::interp::getField(), clang::interp::GetIntPtr(), clang::interp::GetPtrDerivedPop(), clang::interp::InitElem(), clang::interp::InitElemPop(), clang::interp::interp__builtin_elementwise_countzeroes(), clang::interp::interp__builtin_ia32_vcvtps2ph(), clang::interp::interp__builtin_is_within_lifetime(), clang::interp::interp__builtin_memchr(), clang::interp::interp__builtin_memcmp(), clang::interp::interp__builtin_memcpy(), clang::interp::interp__builtin_operator_delete(), clang::interp::interp__builtin_operator_new(), clang::interp::InvalidDeclRef(), clang::interp::InvalidNewDeleteExpr(), clang::interp::InvalidShuffleVectorIndex(), clang::interp::InvalidStore(), clang::interp::OffsetHelper(), clang::interp::PtrPtrCast(), clang::interp::runRecordDestructor(), and clang::interp::SubPtr().

getThis()

const Pointer & clang::interp::InterpFrame::getThis ( ) const

inline

Returns the 'this' pointer.

Definition at line 132 of file InterpFrame.h.

References hasThisPointer(), and isBottomFrame().

Referenced by clang::interp::ActivateThisField(), clang::interp::CheckLiteralType(), describe(), dump(), clang::interp::GetPtrThisBase(), clang::interp::GetPtrThisField(), clang::interp::GetPtrThisVirtBase(), clang::interp::GetThisField(), clang::interp::InitThisBitField(), clang::interp::InitThisBitFieldActivate(), clang::interp::InitThisField(), clang::interp::InitThisFieldActivate(), clang::interp::runRecordDestructor(), clang::interp::SetThisField(), and clang::interp::This().

hasThisPointer()

bool clang::interp::InterpFrame::hasThisPointer ( ) const

inline

Definition at line 129 of file InterpFrame.h.

Referenced by clang::interp::ActivateThisField(), clang::interp::CheckThis(), dump(), getThis(), and clang::interp::runRecordDestructor().

initScope()

void InterpFrame::initScope

(

unsigned

Idx

)

Definition at line 95 of file InterpFrame.cpp.

Referenced by clang::interp::InitScope().

isBottomFrame()

bool clang::interp::InterpFrame::isBottomFrame ( ) const

inline

Definition at line 165 of file InterpFrame.h.

References Caller.

Referenced by clang::interp::CheckLiteralType(), clang::interp::CtorCheck(), free(), getParamPointer(), clang::interp::GetPtrParam(), getRVOPtr(), getThis(), and clang::interp::runRecordDestructor().

isLocalEnabled()

bool clang::interp::InterpFrame::isLocalEnabled ( unsigned Idx ) const

inline

Definition at line 76 of file InterpFrame.h.

Referenced by clang::interp::EnableLocal(), and clang::interp::GetLocalEnabled().

isRoot()

bool clang::interp::InterpFrame::isRoot ( ) const

inline

Checks if the frame is a root frame - return should quit the interpreter.

Definition at line 147 of file InterpFrame.h.

Referenced by clang::interp::Interpret().

isStdFunction()

bool InterpFrame::isStdFunction

(

)

const

Definition at line 315 of file InterpFrame.cpp.

References clang::DeclContext::getParent().

Referenced by clang::interp::InvalidNewDeleteExpr().

setLocal()

template<typename T>

void clang::interp::InterpFrame::setLocal ( unsigned Offset, const T & Value )

inline

Mutates a local variable.

Definition at line 104 of file InterpFrame.h.

Referenced by clang::interp::SetLocal().

setParam()

template<typename T>

void clang::interp::InterpFrame::setParam ( unsigned Index, const T & Value )

inline

Mutates a local copy of a parameter.

Definition at line 122 of file InterpFrame.h.

Referenced by clang::interp::SetParam().

Member Data Documentation

Caller

InterpFrame* clang::interp::InterpFrame::Caller

The frame of the previous function.

Definition at line 30 of file InterpFrame.h.

Referenced by clang::interp::cleanupAfterFunctionCall(), describe(), dump(), getCaller(), getCallRange(), getExpr(), getLocation(), getRange(), getSource(), clang::interp::interp__builtin_is_within_lifetime(), InterpFrame(), InterpFrame(), isBottomFrame(), clang::interp::Ret(), and clang::interp::RetVoid().

MSVCConstexprAllowed

unsigned clang::interp::InterpFrame::MSVCConstexprAllowed = 0

Definition at line 229 of file InterpFrame.h.

Referenced by clang::interp::CheckCallable(), clang::interp::CheckFunctionDecl(), clang::interp::InvalidNewDeleteExpr(), clang::interp::PopMSVCCE(), and clang::interp::PushMSVCCE().

---

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

• lib/AST/ByteCode/InterpFrame.h
• lib/AST/ByteCode/Disasm.cpp
• lib/AST/ByteCode/InterpFrame.cpp