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Public Types | Public Member Functions | Protected Member Functions | Protected Attributes | List of all members
clang::ento::SVal Class Reference

SVal - This represents a symbolic expression, which can be either an L-value or an R-value. More...

#include "clang/StaticAnalyzer/Core/PathSensitive/SVals.h"

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Public Types

enum  BaseKind
 
enum  { BaseBits = 2, BaseMask = 0x3 }
 

Public Member Functions

 SVal ()=default
 
template<typename T >
T castAs () const
 Convert to the specified SVal type, asserting that this SVal is of the desired type. More...
 
template<typename T >
Optional< T > getAs () const
 Convert to the specified SVal type, returning None if this SVal is not of the desired type. More...
 
unsigned getRawKind () const
 
BaseKind getBaseKind () const
 
unsigned getSubKind () const
 
void Profile (llvm::FoldingSetNodeID &ID) const
 
bool operator== (const SVal &R) const
 
bool operator!= (const SVal &R) const
 
bool isUnknown () const
 
bool isUndef () const
 
bool isUnknownOrUndef () const
 
bool isValid () const
 
bool isConstant () const
 
bool isConstant (int I) const
 
bool isZeroConstant () const
 
bool hasConjuredSymbol () const
 hasConjuredSymbol - If this SVal wraps a conjured symbol, return true; More...
 
const FunctionDecl * getAsFunctionDecl () const
 getAsFunctionDecl - If this SVal is a MemRegionVal and wraps a CodeTextRegion wrapping a FunctionDecl, return that FunctionDecl. More...
 
SymbolRef getAsLocSymbol (bool IncludeBaseRegions=false) const
 If this SVal is a location and wraps a symbol, return that SymbolRef. More...
 
SymbolRef getLocSymbolInBase () const
 Get the symbol in the SVal or its base region. More...
 
SymbolRef getAsSymbol (bool IncludeBaseRegions=false) const
 If this SVal wraps a symbol return that SymbolRef. More...
 
const SymExpr * getAsSymbolicExpression () const
 getAsSymbolicExpression - If this Sval wraps a symbolic expression then return that expression. More...
 
const SymExpr * getAsSymExpr () const
 
const MemRegion * getAsRegion () const
 
void dumpToStream (raw_ostream &OS) const
 
void dump () const
 
SymExpr::symbol_iterator symbol_begin () const
 
SymExpr::symbol_iterator symbol_end () const
 

Protected Member Functions

 SVal (const void *d, bool isLoc, unsigned ValKind)
 
 SVal (BaseKind k, const void *D=nullptr)
 

Protected Attributes

const void * Data = nullptr
 
unsigned Kind = 0
 The lowest 2 bits are a BaseKind (0 – 3). More...
 

Detailed Description

SVal - This represents a symbolic expression, which can be either an L-value or an R-value.

Definition at line 75 of file SVals.h.

Member Enumeration Documentation

◆ anonymous enum

anonymous enum
Enumerator
BaseBits 
BaseMask 

Definition at line 83 of file SVals.h.

◆ BaseKind

enum clang::ento::SVal::BaseKind

Definition at line 77 of file SVals.h.

Constructor & Destructor Documentation

◆ SVal() [1/3]

clang::ento::SVal::SVal ( const void *  d,
bool  isLoc,
unsigned  ValKind 
)
inlineexplicitprotected

Definition at line 92 of file SVals.h.

◆ SVal() [2/3]

clang::ento::SVal::SVal ( BaseKind  k,
const void *  D = nullptr 
)
inlineexplicitprotected

Definition at line 95 of file SVals.h.

◆ SVal() [3/3]

clang::ento::SVal::SVal ( )
explicitdefault

Member Function Documentation

◆ castAs()

template<typename T >
T clang::ento::SVal::castAs ( ) const
inline

Convert to the specified SVal type, asserting that this SVal is of the desired type.

Definition at line 103 of file SVals.h.

Referenced by clang::ento::SimpleConstraintManager::assume(), clang::ento::ProgramState::assume(), clang::ento::ProgramState::assumeInBound(), clang::ento::SimpleConstraintManager::assumeInclusiveRange(), clang::ento::ProgramState::assumeInclusiveRange(), clang::ento::ProgramState::bindDefaultInitial(), clang::ento::ProgramState::bindDefaultZero(), clang::ento::ExprEngine::bindReturnValue(), clang::ento::StoreManager::CastRetrievedVal(), clang::ento::SValBuilder::convertToArrayIndex(), clang::ento::createSimpleSValBuilder(), clang::ento::ExprEngine::evalBind(), clang::ento::SValBuilder::evalBinOp(), clang::ento::ExprEngine::evalBinOp(), clang::ento::SValBuilder::evalCast(), clang::ento::ExprEngine::evalComplement(), clang::ento::SValBuilder::evalEQ(), clang::ento::SValBuilder::evalIntegralCast(), clang::ento::ExprEngine::evalLoad(), clang::ento::ExprEngine::evalMinus(), clang::ento::ExprEngine::getInitialState(), clang::ento::nonloc::LocAsInteger::getLoc(), clang::ento::StoreManager::getLValueElement(), clang::ento::nonloc::LocAsInteger::getPersistentLoc(), clang::ento::ExprEngine::ProcessAutomaticObjDtor(), clang::ento::ExprEngine::ProcessBaseDtor(), clang::ento::ExprEngine::processBranch(), clang::ento::ExprEngine::processCallExit(), clang::ento::ExprEngine::ProcessMemberDtor(), clang::ento::ExprEngine::processSwitch(), clang::ento::ExprEngine::VisitCallExpr(), clang::ento::ExprEngine::VisitCommonDeclRefExpr(), clang::ento::ExprEngine::VisitCXXNewAllocatorCall(), clang::ento::ExprEngine::VisitIncrementDecrementOperator(), clang::ento::ExprEngine::VisitObjCMessage(), and clang::ento::ExprEngine::VisitUnaryOperator().

◆ dump()

LLVM_DUMP_METHOD void SVal::dump ( ) const

Definition at line 284 of file SVals.cpp.

References dumpToStream().

◆ dumpToStream()

void SVal::dumpToStream ( raw_ostream &  OS) const

Definition at line 286 of file SVals.cpp.

References getBaseKind().

Referenced by dump(), and clang::ento::operator<<().

◆ getAs()

template<typename T >
Optional<T> clang::ento::SVal::getAs ( ) const
inline

Convert to the specified SVal type, returning None if this SVal is not of the desired type.

Definition at line 111 of file SVals.h.

Referenced by clang::ento::SimpleConstraintManager::assume(), clang::ento::ProgramState::assumeInclusiveRange(), clang::ento::ProgramState::bindLoc(), clang::ento::SMTConstraintManager::canReasonAbout(), clang::ento::mpi::MPIChecker::checkMissingWaits(), clang::ento::retaincountchecker::RetainCountChecker::checkPostStmt(), clang::ento::SValBuilder::convertToArrayIndex(), clang::ento::ExprEngine::CreateCXXTemporaryObject(), clang::ento::CreateRangeConstraintManager(), clang::ento::createSimpleSValBuilder(), dereference(), DereferenceInfo::DereferenceInfo(), clang::ento::ExprEngine::evalBind(), clang::ento::SValBuilder::evalBinOp(), evalBinOpFieldRegionFieldRegion(), clang::ento::retaincountchecker::RetainCountChecker::evalCall(), clang::ento::SValBuilder::evalCast(), clang::ento::ExprEngine::evalEagerlyAssumeBinOpBifurcation(), clang::ento::ExprEngine::evalLoad(), clang::ento::FindUninitializedFields::FindUninitializedFields(), clang::ento::ElementRegion::getAsArrayOffset(), clang::ento::MemRegion::getDescriptiveName(), clang::ento::ExprEngine::getInitialState(), clang::ento::ProgramState::getLValue(), clang::ento::StoreManager::getLValueElement(), clang::ento::StackHintGeneratorForSymbol::getMessage(), clang::ento::ProgramState::getSValAsScalarOrLoc(), clang::ento::ProgramState::killBinding(), clang::ento::SValBuilder::makeSymExprValNN(), clang::ento::ExprEngine::processIndirectGoto(), clang::ento::ExprEngine::ProcessInitializer(), clang::ento::ExprEngine::processPointerEscapedOnBind(), clang::ento::ExprEngine::processSwitch(), clang::ento::ScanReachableSymbols::scan(), updateOutParameters(), clang::ento::ExprEngine::VisitCast(), clang::ento::ExprEngine::VisitCXXConstructExpr(), clang::ento::ExprEngine::VisitCXXNewExpr(), clang::ento::SValExplainer::VisitElementRegion(), and clang::ento::ExprEngine::VisitGCCAsmStmt().

◆ getAsFunctionDecl()

const FunctionDecl * SVal::getAsFunctionDecl ( ) const

getAsFunctionDecl - If this SVal is a MemRegionVal and wraps a CodeTextRegion wrapping a FunctionDecl, return that FunctionDecl.

Otherwise return 0.

Definition at line 62 of file SVals.cpp.

References clang::ento::MemRegion::getAs(), and X.

Referenced by clang::ento::CheckerContext::getCalleeDecl(), and clang::ento::SimpleFunctionCall::getDecl().

◆ getAsLocSymbol()

SymbolRef SVal::getAsLocSymbol ( bool  IncludeBaseRegions = false) const

If this SVal is a location and wraps a symbol, return that SymbolRef.

If this SVal is a location (subclasses Loc) and wraps a symbol, return that SymbolRef.

Otherwise return 0.

Casts are ignored during lookup.

Parameters
IncludeBaseRegionsThe boolean that controls whether the search should continue to the base regions if the region is not symbolic.

Otherwise return 0.

Implicit casts (ex: void* -> char*) can turn Symbolic region into Element region. If that is the case, gets the underlining region. When IncludeBaseRegions is set to true and the SubRegion is non-symbolic, the first symbolic parent region is returned.

Definition at line 84 of file SVals.cpp.

References clang::ento::MemRegion::getSymbolicBase(), clang::ento::MemRegion::StripCasts(), and X.

Referenced by clang::ento::retaincountchecker::RetainCountChecker::checkPostCall(), clang::ento::retaincountchecker::RetainCountChecker::checkPostStmt(), clang::ento::retaincountchecker::RetainCountChecker::checkSummary(), getAsSymbol(), clang::ento::StackHintGeneratorForSymbol::getMessage(), clang::ento::StoreManager::FindUniqueBinding::HandleBinding(), clang::ento::retaincountchecker::RetainCountChecker::processSummaryOfInlined(), and updateOutParameters().

◆ getAsRegion()

const MemRegion * SVal::getAsRegion ( ) const

Definition at line 150 of file SVals.cpp.

References X.

Referenced by clang::ento::ProgramState::addPartialTaint(), clang::ento::StoreManager::attemptDownCast(), clang::ento::ExprEngine::bindReturnValue(), clang::ento::StoreManager::CastRetrievedVal(), clang::ento::retaincountchecker::RetainCountChecker::checkBind(), clang::ento::mpi::MPIChecker::checkMissingWaits(), clang::ento::retaincountchecker::RetainCountChecker::checkPostStmt(), clang::ento::ExprEngine::CreateCXXTemporaryObject(), dereference(), clang::ento::SValBuilder::evalCast(), clang::ento::StoreManager::evalDerivedToBase(), clang::BlockCall::getBlockRegion(), getConstructedRegion(), clang::ento::ExprEngine::getInitialState(), clang::ento::BugReport::isInteresting(), clang::ento::BugReport::markInteresting(), clang::ento::ExprEngine::ProcessAutomaticObjDtor(), clang::ento::ExprEngine::ProcessDeleteDtor(), clang::ento::ExprEngine::ProcessInitializer(), clang::ento::ExprEngine::ProcessTemporaryDtor(), clang::ento::ProgramStateManager::removeDeadBindings(), updateOutParameters(), clang::ento::ExprEngine::VisitBlockExpr(), clang::ento::ExprEngine::VisitCXXConstructExpr(), and clang::ento::ExprEngine::VisitCXXNewExpr().

◆ getAsSymbol()

SymbolRef SVal::getAsSymbol ( bool  IncludeBaseRegions = false) const

If this SVal wraps a symbol return that SymbolRef.

Otherwise, return 0.

Casts are ignored during lookup.

Parameters
IncludeBaseRegionsThe boolean that controls whether the search should continue to the base regions if the region is not symbolic.

Definition at line 126 of file SVals.cpp.

References getAsLocSymbol(), and X.

Referenced by clang::ento::SimpleConstraintManager::assumeInclusiveRange(), clang::ento::StoreManager::CastRetrievedVal(), clang::ento::retaincountchecker::RetainCountChecker::checkPostStmt(), clang::ento::retaincountchecker::RetainCountChecker::checkSummary(), clang::ento::SValBuilder::evalCast(), getAsSymbolicExpression(), getAsSymExpr(), clang::ento::ProgramState::getSValAsScalarOrLoc(), clang::ento::BugReport::isInteresting(), clang::ento::ProgramState::isNull(), clang::ento::BugReport::markInteresting(), clang::ento::retaincountchecker::RetainCountChecker::processObjCLiterals(), clang::ento::retaincountchecker::RetainCountChecker::processSummaryOfInlined(), and clang::ento::ScanReachableSymbols::scan().

◆ getAsSymbolicExpression()

const SymExpr * SVal::getAsSymbolicExpression ( ) const

getAsSymbolicExpression - If this Sval wraps a symbolic expression then return that expression.

Otherwise return NULL.

Definition at line 136 of file SVals.cpp.

References getAsSymbol(), and X.

Referenced by clang::ento::SValBuilder::evalIntegralCast(), getAsSymExpr(), and clang::ento::ScanReachableSymbols::scan().

◆ getAsSymExpr()

const SymExpr * SVal::getAsSymExpr ( ) const

Definition at line 143 of file SVals.cpp.

References getAsSymbol(), and getAsSymbolicExpression().

Referenced by clang::ento::ProgramState::addPartialTaint(), clang::ento::SimpleConstraintManager::assume(), clang::ento::SimpleConstraintManager::assumeInclusiveRange(), and clang::ento::SValBuilder::makeSymExprValNN().

◆ getBaseKind()

BaseKind clang::ento::SVal::getBaseKind ( ) const
inline

Definition at line 118 of file SVals.h.

Referenced by dumpToStream(), and clang::ento::SValVisitor< SValExplainer, std::string >::Visit().

◆ getLocSymbolInBase()

SymbolRef SVal::getLocSymbolInBase ( ) const

Get the symbol in the SVal or its base region.

Definition at line 100 of file SVals.cpp.

References X.

◆ getRawKind()

unsigned clang::ento::SVal::getRawKind ( ) const
inline

Definition at line 117 of file SVals.h.

Referenced by operator==().

◆ getSubKind()

unsigned clang::ento::SVal::getSubKind ( ) const
inline

Definition at line 119 of file SVals.h.

Referenced by clang::ento::SimpleConstraintManager::assume(), clang::ento::SimpleConstraintManager::assumeInclusiveRange(), clang::ento::StoreManager::CastRetrievedVal(), clang::ento::NonLoc::dumpToStream(), clang::ento::Loc::dumpToStream(), and clang::ento::SValVisitor< SValExplainer, std::string >::Visit().

◆ hasConjuredSymbol()

bool SVal::hasConjuredSymbol ( ) const

hasConjuredSymbol - If this SVal wraps a conjured symbol, return true;

Definition at line 43 of file SVals.cpp.

◆ isConstant() [1/2]

bool SVal::isConstant ( ) const

Definition at line 221 of file SVals.cpp.

Referenced by clang::ento::SValBuilder::evalCast(), clang::ento::ProgramState::isNull(), isZeroConstant(), and clang::ento::ExprEngine::VisitCast().

◆ isConstant() [2/2]

bool SVal::isConstant ( int  I) const

Definition at line 225 of file SVals.cpp.

◆ isUndef()

bool clang::ento::SVal::isUndef ( ) const
inline

Definition at line 140 of file SVals.h.

Referenced by DereferenceInfo::DereferenceInfo(), clang::ento::SValBuilder::evalBinOp(), clang::ento::ExprEngine::evalLoad(), clang::ento::ExprEngine::evalStore(), clang::ento::FindUninitializedFields::FindUninitializedFields(), clang::ento::ExprEngine::processSwitch(), clang::ento::ExprEngine::VisitCast(), and clang::ento::ExprEngine::VisitObjCMessage().

◆ isUnknown()

bool clang::ento::SVal::isUnknown ( ) const
inline

Definition at line 136 of file SVals.h.

Referenced by clang::ento::ProgramState::assume(), clang::ento::ProgramState::assumeInBound(), clang::ento::ProgramState::assumeInclusiveRange(), clang::ento::EnvironmentManager::bindExpr(), clang::ento::ExprEngine::CreateCXXTemporaryObject(), DereferenceInfo::DereferenceInfo(), clang::ento::SValBuilder::evalBinOp(), clang::ento::retaincountchecker::RetainCountChecker::evalCall(), clang::ento::ExprEngine::evalLoad(), clang::ento::ExprEngine::getInitialState(), clang::ento::ExprEngine::handleLValueBitCast(), clang::ento::ExprEngine::processBranch(), clang::ento::ExprEngine::VisitBinaryOperator(), clang::ento::ExprEngine::VisitCast(), clang::ento::ExprEngine::VisitCXXNewExpr(), and clang::ento::ExprEngine::VisitDeclStmt().

◆ isUnknownOrUndef()

bool clang::ento::SVal::isUnknownOrUndef ( ) const
inline

Definition at line 144 of file SVals.h.

Referenced by clang::ento::ProgramState::assumeInBound(), clang::ento::StoreManager::CastRetrievedVal(), clang::ento::SValBuilder::convertToArrayIndex(), clang::ento::ExprEngine::CreateCXXTemporaryObject(), clang::ento::SValBuilder::evalCast(), clang::ento::StoreManager::getLValueElement(), clang::ento::ExprEngine::processBranch(), clang::ento::ExprEngine::ProcessInitializer(), and clang::ento::ExprEngine::VisitUnaryOperator().

◆ isValid()

bool clang::ento::SVal::isValid ( ) const
inline

Definition at line 148 of file SVals.h.

References dump(), and clang::ento::OS.

Referenced by clang::ento::ExprEngine::evalBinOp(), clang::ento::ExprEngine::evalComplement(), clang::ento::ExprEngine::evalLoad(), and clang::ento::ExprEngine::evalMinus().

◆ isZeroConstant()

bool SVal::isZeroConstant ( ) const

Definition at line 233 of file SVals.cpp.

References isConstant().

Referenced by clang::ento::SValBuilder::evalCast(), clang::ento::FieldRegion::getExtent(), clang::ento::ProgramState::isNull(), and clang::ento::ExprEngine::VisitCast().

◆ operator!=()

bool clang::ento::SVal::operator!= ( const SVal &  R) const
inline

Definition at line 132 of file SVals.h.

◆ operator==()

bool clang::ento::SVal::operator== ( const SVal &  R) const
inline

Definition at line 128 of file SVals.h.

References Data, and getRawKind().

◆ Profile()

void clang::ento::SVal::Profile ( llvm::FoldingSetNodeID &  ID) const
inline

Definition at line 123 of file SVals.h.

Referenced by clang::ento::BasicValueFactory::getPersistentSValPair(), clang::ento::BasicValueFactory::getPersistentSValWithData(), and clang::ento::SymbolicRegion::Profile().

◆ symbol_begin()

SymExpr::symbol_iterator clang::ento::SVal::symbol_begin ( ) const
inline

Definition at line 196 of file SVals.h.

References clang::ento::SymExpr::symbol_begin().

◆ symbol_end()

SymExpr::symbol_iterator clang::ento::SVal::symbol_end ( ) const
inline

Definition at line 204 of file SVals.h.

References clang::ento::SymExpr::symbol_end().

Member Data Documentation

◆ Data

const void* clang::ento::SVal::Data = nullptr
protected

Definition at line 86 of file SVals.h.

Referenced by clang::ento::nonloc::LazyCompoundVal::getRegion(), clang::ento::nonloc::LazyCompoundVal::getStore(), and operator==().

◆ Kind

unsigned clang::ento::SVal::Kind = 0
protected

The lowest 2 bits are a BaseKind (0 – 3).

The higher bits are an unsigned "kind" value.

Definition at line 90 of file SVals.h.

The documentation for this class was generated from the following files:
Generated on Sat Feb 23 2019 00:58:02 for clang by   doxygen 1.8.13