NullabilityChecker.cpp File Reference

#include "clang/StaticAnalyzer/Checkers/BuiltinCheckerRegistration.h"
#include "clang/StaticAnalyzer/Core/BugReporter/BugType.h"
#include "clang/StaticAnalyzer/Core/Checker.h"
#include "clang/StaticAnalyzer/Core/CheckerManager.h"
#include "clang/StaticAnalyzer/Core/PathSensitive/CheckerHelpers.h"
#include "clang/StaticAnalyzer/Core/PathSensitive/CheckerContext.h"
#include "clang/StaticAnalyzer/Core/PathSensitive/CallEvent.h"
#include "llvm/ADT/StringExtras.h"
#include "llvm/Support/Path.h"

Go to the source code of this file.

Macros
#define	REGISTER_CHECKER(name, trackingRequired)

Enumerations
enum class	NullConstraint { IsNull , IsNotNull , Unknown }

Functions
	REGISTER_MAP_WITH_PROGRAMSTATE (NullabilityMap, const MemRegion *, NullabilityState) REGISTER_MAP_WITH_PROGRAMSTATE(PropertyAccessesMap
static NullConstraint	getNullConstraint (DefinedOrUnknownSVal Val, ProgramStateRef State)
static bool	isValidPointerType (QualType T)
static bool	checkValueAtLValForInvariantViolation (ProgramStateRef State, SVal LV, QualType T)
	Returns true when the value stored at the given location has been constrained to null after being passed through an object of nonnnull type.
static bool	checkParamsForPreconditionViolation (ArrayRef< ParmVarDecl * > Params, ProgramStateRef State, const LocationContext *LocCtxt)
static bool	checkSelfIvarsForInvariantViolation (ProgramStateRef State, const LocationContext *LocCtxt)
static bool	checkInvariantViolation (ProgramStateRef State, ExplodedNode *N, CheckerContext &C)
static const Expr *	lookThroughImplicitCasts (const Expr *E)
	Find the outermost subexpression of E that is not an implicit cast.
static Nullability	getReceiverNullability (const ObjCMethodCall &M, ProgramStateRef State)
static const Expr *	matchValueExprForBind (const Stmt *S)
	For a given statement performing a bind, attempt to syntactically match the expression resulting in the bound value.
static bool	isARCNilInitializedLocal (CheckerContext &C, const Stmt *S)
	Returns true if.

Variables
	ObjectPropPair

Macro Definition Documentation

REGISTER_CHECKER

#define REGISTER_CHECKER	(		name,
			trackingRequired
	)

Value:

  void ento::register##name##Checker(CheckerManager &mgr) {                    \
    NullabilityChecker *checker = mgr.getChecker<NullabilityChecker>();        \
    checker->ChecksEnabled[NullabilityChecker::CK_##name] = true;              \
    checker->CheckNames[NullabilityChecker::CK_##name] =                       \
        mgr.getCurrentCheckerName();                                           \
    checker->NeedTracking = checker->NeedTracking || trackingRequired;         \
    checker->NoDiagnoseCallsToSystemHeaders =                                  \
        checker->NoDiagnoseCallsToSystemHeaders ||                             \
        mgr.getAnalyzerOptions().getCheckerBooleanOption(                      \
            checker, "NoDiagnoseCallsToSystemHeaders", true);                  \
  }                                                                            \
                                                                               \
  bool ento::shouldRegister##name##Checker(const CheckerManager &mgr) {        \
    return true;                                                               \
  }

Definition at line 1359 of file NullabilityChecker.cpp.

Enumeration Type Documentation

NullConstraint

enum class NullConstraint

strong

Enumerator
IsNull
IsNotNull
Unknown

Definition at line 297 of file NullabilityChecker.cpp.

Function Documentation

checkInvariantViolation()

static bool checkInvariantViolation ( ProgramStateRef  State, ExplodedNode *  N, CheckerContext &  C  )

static

Definition at line 448 of file NullabilityChecker.cpp.

References clang::C, checkParamsForPreconditionViolation(), checkSelfIvarsForInvariantViolation(), clang::LocationContext::getDecl(), and clang::ento::ExplodedNode::isSink().

checkParamsForPreconditionViolation()

static bool checkParamsForPreconditionViolation ( ArrayRef< ParmVarDecl * >  Params, ProgramStateRef  State, const LocationContext *  LocCtxt  )

static

Definition at line 401 of file NullabilityChecker.cpp.

References checkValueAtLValForInvariantViolation(), and clang::ento::SVal::getType().

Referenced by checkInvariantViolation().

checkSelfIvarsForInvariantViolation()

static bool checkSelfIvarsForInvariantViolation ( ProgramStateRef  State, const LocationContext *  LocCtxt  )

static

Definition at line 418 of file NullabilityChecker.cpp.

References checkValueAtLValForInvariantViolation(), clang::LocationContext::getDecl(), clang::ObjCObjectPointerType::getInterfaceDecl(), clang::LocationContext::getSelfDecl(), clang::ValueDecl::getType(), and clang::ento::SVal::getType().

Referenced by checkInvariantViolation().

checkValueAtLValForInvariantViolation()

static bool checkValueAtLValForInvariantViolation ( ProgramStateRef  State, SVal  LV, QualType  T  )

static

Returns true when the value stored at the given location has been constrained to null after being passed through an object of nonnnull type.

Definition at line 375 of file NullabilityChecker.cpp.

References clang::ento::SVal::getAs(), clang::ento::getNullabilityAnnotation(), getNullConstraint(), and IsNull.

Referenced by checkParamsForPreconditionViolation(), and checkSelfIvarsForInvariantViolation().

getNullConstraint()

static NullConstraint getNullConstraint ( DefinedOrUnknownSVal  Val, ProgramStateRef  State  )

static

Definition at line 299 of file NullabilityChecker.cpp.

References clang::ento::ConditionTruthVal::isConstrainedFalse(), clang::ento::ConditionTruthVal::isConstrainedTrue(), IsNotNull, IsNull, and Unknown.

Referenced by checkValueAtLValForInvariantViolation(), and getReceiverNullability().

getReceiverNullability()

static Nullability getReceiverNullability ( const ObjCMethodCall &  M, ProgramStateRef  State  )

static

Definition at line 878 of file NullabilityChecker.cpp.

References clang::ento::SVal::getAs(), getNullConstraint(), clang::ento::ObjCMethodCall::getReceiverSVal(), IsNotNull, and clang::ento::ObjCMethodCall::isReceiverSelfOrSuper().

isARCNilInitializedLocal()

static bool isARCNilInitializedLocal ( CheckerContext &  C, const Stmt *  S  )

static

Returns true if.

Parameters

S	is a DeclStmt for a local variable that ObjC automated reference counting initialized with zero.

Definition at line 1172 of file NullabilityChecker.cpp.

References clang::C.

isValidPointerType()

static bool isValidPointerType ( QualType  T )

static

Definition at line 309 of file NullabilityChecker.cpp.

References clang::Type::isAnyPointerType(), and clang::Type::isBlockPointerType().

lookThroughImplicitCasts()

static const Expr * lookThroughImplicitCasts ( const Expr *  E )

static

Find the outermost subexpression of E that is not an implicit cast.

This looks through the implicit casts to _Nonnull that ARC adds to return expressions of ObjC types when the return type of the function or method is non-null but the express is not.

Definition at line 616 of file NullabilityChecker.cpp.

References clang::Expr::IgnoreImpCasts().

matchValueExprForBind()

static const Expr * matchValueExprForBind ( const Stmt *  S )

static

For a given statement performing a bind, attempt to syntactically match the expression resulting in the bound value.

Definition at line 1148 of file NullabilityChecker.cpp.

REGISTER_MAP_WITH_PROGRAMSTATE()

REGISTER_MAP_WITH_PROGRAMSTATE	(	NullabilityMap	,
		const MemRegion *	,
		NullabilityState
	)

Variable Documentation

ObjectPropPair

ObjectPropPair

Definition at line 268 of file NullabilityChecker.cpp.