#include "clang/StaticAnalyzer/Core/BugReporter/BugReporter.h"
#include "clang/AST/Decl.h"
#include "clang/AST/DeclBase.h"
#include "clang/AST/DeclObjC.h"
#include "clang/AST/Expr.h"
#include "clang/AST/ExprCXX.h"
#include "clang/AST/ParentMap.h"
#include "clang/AST/Stmt.h"
#include "clang/AST/StmtCXX.h"
#include "clang/AST/StmtObjC.h"
#include "clang/Analysis/AnalysisDeclContext.h"
#include "clang/Analysis/CFG.h"
#include "clang/Analysis/CFGStmtMap.h"
#include "clang/Analysis/PathDiagnostic.h"
#include "clang/Analysis/ProgramPoint.h"
#include "clang/Basic/LLVM.h"
#include "clang/Basic/SourceLocation.h"
#include "clang/Basic/SourceManager.h"
#include "clang/StaticAnalyzer/Core/AnalyzerOptions.h"
#include "clang/StaticAnalyzer/Core/BugReporter/BugReporterVisitors.h"
#include "clang/StaticAnalyzer/Core/BugReporter/BugType.h"
#include "clang/StaticAnalyzer/Core/Checker.h"
#include "clang/StaticAnalyzer/Core/CheckerManager.h"
#include "clang/StaticAnalyzer/Core/CheckerRegistryData.h"
#include "clang/StaticAnalyzer/Core/PathSensitive/ExplodedGraph.h"
#include "clang/StaticAnalyzer/Core/PathSensitive/ExprEngine.h"
#include "clang/StaticAnalyzer/Core/PathSensitive/MemRegion.h"
#include "clang/StaticAnalyzer/Core/PathSensitive/ProgramState.h"
#include "clang/StaticAnalyzer/Core/PathSensitive/SMTConv.h"
#include "clang/StaticAnalyzer/Core/PathSensitive/SVals.h"
#include "clang/StaticAnalyzer/Core/PathSensitive/SymbolManager.h"
#include "llvm/ADT/ArrayRef.h"
#include "llvm/ADT/DenseMap.h"
#include "llvm/ADT/DenseSet.h"
#include "llvm/ADT/FoldingSet.h"
#include "llvm/ADT/STLExtras.h"
#include "llvm/ADT/SmallPtrSet.h"
#include "llvm/ADT/SmallString.h"
#include "llvm/ADT/SmallVector.h"
#include "llvm/ADT/Statistic.h"
#include "llvm/ADT/StringExtras.h"
#include "llvm/ADT/StringRef.h"
#include "llvm/ADT/iterator_range.h"
#include "llvm/Support/Casting.h"
#include "llvm/Support/Compiler.h"
#include "llvm/Support/ErrorHandling.h"
#include "llvm/Support/MemoryBuffer.h"
#include "llvm/Support/raw_ostream.h"
#include <algorithm>
#include <cassert>
#include <cstddef>
#include <iterator>
#include <memory>
#include <optional>
#include <queue>
#include <string>
#include <tuple>
#include <utility>
#include <vector>

Macros
#define	DEBUG_TYPE "BugReporter"

Typedefs
using	OptimizedCallsSet = llvm::DenseSet< const PathDiagnosticCallPiece * >

Functions
	STATISTIC (MaxBugClassSize, "The maximum number of bug reports in the same equivalence class")

	STATISTIC (MaxValidBugClassSize, "The maximum number of bug reports in the same equivalence class " "where at least one report is valid (not suppressed)")

static PathDiagnosticEventPiece *	eventsDescribeSameCondition (PathDiagnosticEventPiece X, PathDiagnosticEventPiece Y)

static void	removeRedundantMsgs (PathPieces &path)
	An optimization pass over PathPieces that removes redundant diagnostics generated by both ConditionBRVisitor and TrackConstraintBRVisitor.

static bool	removeUnneededCalls (const PathDiagnosticConstruct &C, PathPieces &pieces, const PathSensitiveBugReport *R, bool IsInteresting=false)
	Recursively scan through a path and prune out calls and macros pieces that aren't needed.

static void	removePopUpNotes (PathPieces &Path)
	Same logic as above to remove extra pieces.

static bool	hasImplicitBody (const Decl *D)
	Returns true if the given decl has been implicitly given a body, either by the analyzer or by the compiler proper.

static void	adjustCallLocations (PathPieces &Pieces, PathDiagnosticLocation *LastCallLocation=nullptr)
	Recursively scan through a path and make sure that all call pieces have valid locations.

static void	removeEdgesToDefaultInitializers (PathPieces &Pieces)
	Remove edges in and out of C++ default initializer expressions.

static void	removePiecesWithInvalidLocations (PathPieces &Pieces)
	Remove all pieces with invalid locations as these cannot be serialized.

static const Stmt *	getEnclosingParent (const Stmt *S, const ParentMap &PM)

static PathDiagnosticLocation	getEnclosingStmtLocation (const Stmt S, const LocationContext LC, bool allowNestedContexts=false)

static void	CompactMacroExpandedPieces (PathPieces &path, const SourceManager &SM)
	CompactMacroExpandedPieces - This function postprocesses a PathDiagnostic object and collapses PathDiagosticPieces that are expanded by macros.

static bool	isLoop (const Stmt *Term)

static bool	isJumpToFalseBranch (const BlockEdge *BE)

static bool	isContainedByStmt (const ParentMap &PM, const Stmt S, const Stmt SubS)

static const Stmt *	getStmtBeforeCond (const ParentMap &PM, const Stmt Term, const ExplodedNode N)

static bool	isInLoopBody (const ParentMap &PM, const Stmt S, const Stmt Term)

static void	addEdgeToPath (PathPieces &path, PathDiagnosticLocation &PrevLoc, PathDiagnosticLocation NewLoc)
	Adds a sanitized control-flow diagnostic edge to a path.

static const Stmt *	getTerminatorCondition (const CFGBlock *B)
	A customized wrapper for CFGBlock::getTerminatorCondition() which returns the element for ObjCForCollectionStmts.

static std::unique_ptr< FilesToLineNumsMap >	findExecutedLines (const SourceManager &SM, const ExplodedNode *N)

static std::unique_ptr< PathDiagnostic >	generateDiagnosticForBasicReport (const BasicBugReport *R)

static std::unique_ptr< PathDiagnostic >	generateEmptyDiagnosticForReport (const PathSensitiveBugReport *R, const SourceManager &SM)

static const Stmt *	getStmtParent (const Stmt *S, const ParentMap &PM)

static bool	isConditionForTerminator (const Stmt S, const Stmt Cond)

static bool	isIncrementOrInitInForLoop (const Stmt S, const Stmt FL)

static void	addContextEdges (PathPieces &pieces, const LocationContext *LC)
	Adds synthetic edges from top-level statements to their subexpressions.

static void	simplifySimpleBranches (PathPieces &pieces)
	Move edges from a branch condition to a branch target when the condition is simple.

static std::optional< size_t >	getLengthOnSingleLine (const SourceManager &SM, SourceRange Range)
	Returns the number of bytes in the given (character-based) SourceRange.

static std::optional< size_t >	getLengthOnSingleLine (const SourceManager &SM, const Stmt *S)

static void	removeContextCycles (PathPieces &Path, const SourceManager &SM)
	Eliminate two-edge cycles created by addContextEdges().

static bool	lexicalContains (const ParentMap &PM, const Stmt X, const Stmt Y)
	Return true if X is contained by Y.

static void	removePunyEdges (PathPieces &path, const SourceManager &SM, const ParentMap &PM)

static void	removeIdenticalEvents (PathPieces &path)

static bool	optimizeEdges (const PathDiagnosticConstruct &C, PathPieces &path, OptimizedCallsSet &OCS)

static void	dropFunctionEntryEdge (const PathDiagnosticConstruct &C, PathPieces &Path)
	Drop the very first edge in a path, which should be a function entry edge.

static void	updateExecutedLinesWithDiagnosticPieces (PathDiagnostic &PD)
	Populate executes lines with lines containing at least one diagnostics.

static LLVM_ATTRIBUTE_USED bool	isDependency (const CheckerRegistryData &Registry, StringRef CheckerName)

static LLVM_ATTRIBUTE_USED bool	isHidden (const CheckerRegistryData &Registry, StringRef CheckerName)

template<class T >
static void	insertToInterestingnessMap (llvm::DenseMap< T, bugreporter::TrackingKind > &InterestingnessMap, T Val, bugreporter::TrackingKind TKind)

static std::unique_ptr< VisitorsDiagnosticsTy >	generateVisitorsDiagnostics (PathSensitiveBugReport R, const ExplodedNode ErrorNode, BugReporterContext &BRC)
	Generate notes from all visitors.

static void	populateExecutedLinesWithFunctionSignature (const Decl *Signature, const SourceManager &SM, FilesToLineNumsMap &ExecutedLines)
	Insert all lines participating in the function signature `Signature` into `ExecutedLines`.

static void	populateExecutedLinesWithStmt (const Stmt *S, const SourceManager &SM, FilesToLineNumsMap &ExecutedLines)

static PathDiagnosticCallPiece *	getFirstStackedCallToHeaderFile (PathDiagnosticCallPiece *CP, const SourceManager &SMgr)

static void	resetDiagnosticLocationToMainFile (PathDiagnostic &PD)

Variables
constexpr llvm::StringLiteral	StrEnteringLoop = "Entering loop body"

constexpr llvm::StringLiteral	StrLoopBodyZero = "Loop body executed 0 times"

constexpr llvm::StringLiteral	StrLoopRangeEmpty

constexpr llvm::StringLiteral	StrLoopCollectionEmpty

Macro Definition Documentation

◆ DEBUG_TYPE

#define DEBUG_TYPE "BugReporter"

Definition at line 78 of file BugReporter.cpp.

Typedef Documentation

◆ OptimizedCallsSet

using OptimizedCallsSet = llvm::DenseSet<const PathDiagnosticCallPiece *>

Definition at line 1414 of file BugReporter.cpp.

Function Documentation

◆ addContextEdges()

static void addContextEdges	(	PathPieces &	pieces,
		const LocationContext *	LC
	)

static

Adds synthetic edges from top-level statements to their subexpressions.

This avoids a "swoosh" effect, where an edge from a top-level statement A points to a sub-expression B.1 that's not at the start of B. In these cases, we'd like to see an edge from A to B, then another one from B to B.1.

Definition at line 1421 of file BugReporter.cpp.

References clang::ento::PathDiagnosticLocation::asStmt(), getEnclosingStmtLocation(), clang::LocationContext::getParentMap(), clang::ento::PathDiagnosticLocation::getStmtOrNull(), getStmtParent(), clang::ento::PathDiagnosticLocation::isValid(), and P.

Referenced by optimizeEdges().

◆ addEdgeToPath()

static void addEdgeToPath	(	PathPieces &	path,
		PathDiagnosticLocation &	PrevLoc,
		PathDiagnosticLocation	NewLoc
	)

static

Adds a sanitized control-flow diagnostic edge to a path.

Definition at line 1080 of file BugReporter.cpp.

References clang::ento::PathDiagnosticLocation::asLocation(), clang::ento::PathDiagnosticLocation::asStmt(), clang::SourceLocation::isInvalid(), clang::ento::PathDiagnosticLocation::isValid(), and clang::SourceLocation::isValid().

◆ adjustCallLocations()

static void adjustCallLocations	(	PathPieces &	Pieces,
		PathDiagnosticLocation *	LastCallLocation = `nullptr`
	)

static

Recursively scan through a path and make sure that all call pieces have valid locations.

Definition at line 495 of file BugReporter.cpp.

References adjustCallLocations(), and hasImplicitBody().

Referenced by adjustCallLocations().

◆ CompactMacroExpandedPieces()

static void CompactMacroExpandedPieces	(	PathPieces &	path,
		const SourceManager &	SM
	)

static

CompactMacroExpandedPieces - This function postprocesses a PathDiagnostic object and collapses PathDiagosticPieces that are expanded by macros.

Definition at line 2673 of file BugReporter.cpp.

References CompactMacroExpandedPieces(), clang::ento::PathDiagnosticLocation::createSingleLocation(), clang::SourceLocation::isFileID(), clang::SourceLocation::isMacroID(), and SM.

Referenced by CompactMacroExpandedPieces().

◆ dropFunctionEntryEdge()

static void dropFunctionEntryEdge	(	const PathDiagnosticConstruct &	C,
		PathPieces &	Path
	)

static

Drop the very first edge in a path, which should be a function entry edge.

If the first edge is not a function entry edge (say, because the first statement had an invalid source location), this function does nothing.

Definition at line 1945 of file BugReporter.cpp.

References clang::C, and clang::ento::PathDiagnosticLocation::createBegin().

◆ eventsDescribeSameCondition()

static PathDiagnosticEventPiece * eventsDescribeSameCondition	(	PathDiagnosticEventPiece *	X,
		PathDiagnosticEventPiece *	Y
	)

static

Definition at line 347 of file BugReporter.cpp.

References clang::ento::PathDiagnosticSpotPiece::getLocation(), clang::ento::TrackConstraintBRVisitor::getTag(), clang::ento::ConditionBRVisitor::getTag(), clang::ento::PathDiagnosticPiece::getTag(), clang::ento::ConditionBRVisitor::isPieceMessageGeneric(), and X.

Referenced by removeRedundantMsgs().

◆ findExecutedLines()

static std::unique_ptr< FilesToLineNumsMap > findExecutedLines	(	const SourceManager &	SM,
		const ExplodedNode *	N
	)

static

Returns: all executed lines including function signatures on the path starting from N.

Definition at line 3163 of file BugReporter.cpp.

References clang::LocationContext::getDecl(), clang::ento::ExplodedNode::getFirstPred(), clang::ento::ExplodedNode::getLocationAs(), clang::ento::ExplodedNode::getLocationContext(), clang::ParentMap::getParent(), clang::ento::ExplodedNode::getParentMap(), clang::ento::ExplodedNode::getStmtForDiagnostics(), P, populateExecutedLinesWithFunctionSignature(), populateExecutedLinesWithStmt(), and SM.

Referenced by generateEmptyDiagnosticForReport().

◆ generateDiagnosticForBasicReport()

static std::unique_ptr< PathDiagnostic > generateDiagnosticForBasicReport ( const BasicBugReport * R )

static

Definition at line 1325 of file BugReporter.cpp.

References clang::ento::BugReport::getBugType(), clang::ento::BugType::getCategory(), clang::ento::BugType::getCheckerName(), clang::ento::BasicBugReport::getDeclWithIssue(), clang::ento::BugReport::getDescription(), clang::ento::BugType::getDescription(), clang::ento::BugReport::getShortDescription(), clang::ento::BasicBugReport::getUniqueingDecl(), and clang::ento::BasicBugReport::getUniqueingLocation().

Referenced by clang::ento::BugReporter::generateDiagnosticForConsumerMap().

◆ generateEmptyDiagnosticForReport()

static std::unique_ptr< PathDiagnostic > generateEmptyDiagnosticForReport	(	const PathSensitiveBugReport *	R,
		const SourceManager &	SM
	)

static

Definition at line 1335 of file BugReporter.cpp.

References findExecutedLines(), clang::ento::BugReport::getBugType(), clang::ento::BugType::getCategory(), clang::ento::BugType::getCheckerName(), clang::ento::PathSensitiveBugReport::getDeclWithIssue(), clang::ento::BugReport::getDescription(), clang::ento::BugType::getDescription(), clang::ento::PathSensitiveBugReport::getErrorNode(), clang::ento::BugReport::getShortDescription(), clang::ento::PathSensitiveBugReport::getUniqueingDecl(), clang::ento::PathSensitiveBugReport::getUniqueingLocation(), and SM.

◆ generateVisitorsDiagnostics()

static std::unique_ptr< VisitorsDiagnosticsTy > generateVisitorsDiagnostics	(	PathSensitiveBugReport *	R,
		const ExplodedNode *	ErrorNode,
		BugReporterContext &	BRC
	)

static

Generate notes from all visitors.

Notes associated with ErrorNode are generated using getEndPath, and the rest are generated with VisitNode.

Definition at line 2768 of file BugReporter.cpp.

References clang::ento::PathSensitiveBugReport::clearVisitors(), clang::ento::PathDiagnosticPiece::Event, clang::ento::ExplodedNode::getFirstPred(), clang::ento::PathSensitiveBugReport::isValid(), P, V, and clang::ento::PathSensitiveBugReport::visitors().

◆ getEnclosingParent()

static const Stmt * getEnclosingParent	(	const Stmt *	S,
		const ParentMap &	PM
	)

static

Definition at line 618 of file BugReporter.cpp.

References clang::ParentMap::getParentIgnoreParens(), clang::ParentMap::isConsumedExpr(), and Parent.

Referenced by getEnclosingStmtLocation().

◆ getEnclosingStmtLocation()

static PathDiagnosticLocation getEnclosingStmtLocation	(	const Stmt *	S,
		const LocationContext *	LC,
		bool	allowNestedContexts = `false`
	)

static

Definition at line 641 of file BugReporter.cpp.

References clang::Decl::getASTContext(), clang::LocationContext::getDecl(), getEnclosingParent(), clang::LocationContext::getParentMap(), clang::ASTContext::getSourceManager(), and Parent.

Referenced by addContextEdges().

◆ getFirstStackedCallToHeaderFile()

static PathDiagnosticCallPiece * getFirstStackedCallToHeaderFile	(	PathDiagnosticCallPiece *	CP,
		const SourceManager &	SMgr
	)

static

Definition at line 3210 of file BugReporter.cpp.

References clang::ento::PathDiagnosticLocation::asLocation(), clang::ento::PathDiagnosticCallPiece::callEnter, clang::ento::PathDiagnosticCallPiece::callEnterWithin, getFirstStackedCallToHeaderFile(), clang::ento::AnalysisManager::isInCodeFile(), clang::SourceLocation::isMacroID(), and clang::ento::PathDiagnosticCallPiece::path.

Referenced by getFirstStackedCallToHeaderFile(), and resetDiagnosticLocationToMainFile().

◆ getLengthOnSingleLine() [1/2]

static std::optional< size_t > getLengthOnSingleLine	(	const SourceManager &	SM,
		const Stmt *	S
	)

static

See also: getLengthOnSingleLine(SourceManager, SourceRange)

Definition at line 1601 of file BugReporter.cpp.

References getLengthOnSingleLine(), and SM.

◆ getLengthOnSingleLine() [2/2]

static std::optional< size_t > getLengthOnSingleLine	(	const SourceManager &	SM,
		SourceRange	Range
	)

static

Returns the number of bytes in the given (character-based) SourceRange.

If the locations in the range are not on the same line, returns std::nullopt.

Note that this does not do a precise user-visible character or column count.

Definition at line 1572 of file BugReporter.cpp.

References clang::SourceRange::getBegin(), clang::SourceRange::getEnd(), and SM.

Referenced by getLengthOnSingleLine(), optimizeEdges(), removeContextCycles(), and removePunyEdges().

◆ getStmtBeforeCond()

static const Stmt * getStmtBeforeCond	(	const ParentMap &	PM,
		const Stmt *	Term,
		const ExplodedNode *	N
	)

static

Definition at line 1032 of file BugReporter.cpp.

References clang::ProgramPoint::getAs(), clang::ento::ExplodedNode::getFirstPred(), clang::ento::ExplodedNode::getLocation(), and isContainedByStmt().

◆ getStmtParent()

static const Stmt * getStmtParent	(	const Stmt *	S,
		const ParentMap &	PM
	)

static

Definition at line 1345 of file BugReporter.cpp.

References clang::ParentMap::getParentIgnoreParens().

Referenced by addContextEdges(), and optimizeEdges().

◆ getTerminatorCondition()

static const Stmt * getTerminatorCondition ( const CFGBlock * B )

static

A customized wrapper for CFGBlock::getTerminatorCondition() which returns the element for ObjCForCollectionStmts.

Definition at line 1107 of file BugReporter.cpp.

References clang::CFGBlock::getTerminatorCondition().

◆ hasImplicitBody()

static bool hasImplicitBody ( const Decl * D )

static

Returns true if the given decl has been implicitly given a body, either by the analyzer or by the compiler proper.

Definition at line 487 of file BugReporter.cpp.

References clang::Decl::hasBody(), and clang::Decl::isImplicit().

Referenced by adjustCallLocations().

◆ insertToInterestingnessMap()

template<class T >

static void insertToInterestingnessMap	(	llvm::DenseMap< T, bugreporter::TrackingKind > &	InterestingnessMap,
		T	Val,
		bugreporter::TrackingKind	TKind
	)

static

Definition at line 2225 of file BugReporter.cpp.

References clang::ento::bugreporter::Condition, clang::Result, and clang::ento::bugreporter::Thorough.

Referenced by clang::ento::PathSensitiveBugReport::markInteresting().

◆ isConditionForTerminator()

static bool isConditionForTerminator	(	const Stmt *	S,
		const Stmt *	Cond
	)

static

Definition at line 1364 of file BugReporter.cpp.

Referenced by optimizeEdges(), removePunyEdges(), and simplifySimpleBranches().

◆ isContainedByStmt()

static bool isContainedByStmt	(	const ParentMap &	PM,
		const Stmt *	S,
		const Stmt *	SubS
	)

static

Definition at line 1022 of file BugReporter.cpp.

References clang::ParentMap::getParent().

Referenced by getStmtBeforeCond(), and isInLoopBody().

◆ isDependency()

static LLVM_ATTRIBUTE_USED bool isDependency	(	const CheckerRegistryData &	Registry,
		StringRef	CheckerName
	)

static

Definition at line 2111 of file BugReporter.cpp.

References clang::ento::CheckerRegistryData::Dependencies.

Referenced by clang::ento::PathSensitiveBugReport::PathSensitiveBugReport().

◆ isHidden()

static LLVM_ATTRIBUTE_USED bool isHidden	(	const CheckerRegistryData &	Registry,
		StringRef	CheckerName
	)

static

Definition at line 2119 of file BugReporter.cpp.

References clang::ento::CheckerRegistryData::Checkers.

Referenced by clang::ento::PathSensitiveBugReport::PathSensitiveBugReport().

◆ isIncrementOrInitInForLoop()

static bool isIncrementOrInitInForLoop	(	const Stmt *	S,
		const Stmt *	FL
	)

static

Definition at line 1405 of file BugReporter.cpp.

Referenced by optimizeEdges().

◆ isInLoopBody()

static bool isInLoopBody	(	const ParentMap &	PM,
		const Stmt *	S,
		const Stmt *	Term
	)

static

Definition at line 1046 of file BugReporter.cpp.

References clang::Stmt::getStmtClass(), and isContainedByStmt().

◆ isJumpToFalseBranch()

static bool isJumpToFalseBranch ( const BlockEdge * BE )

static

Definition at line 1016 of file BugReporter.cpp.

References clang::BlockEdge::getDst(), clang::BlockEdge::getSrc(), clang::CFGBlock::succ_begin(), and clang::CFGBlock::succ_size().

◆ isLoop()

static bool isLoop ( const Stmt * Term )

static

Definition at line 1003 of file BugReporter.cpp.

References clang::Stmt::getStmtClass().

◆ lexicalContains()

static bool lexicalContains	(	const ParentMap &	PM,
		const Stmt *	X,
		const Stmt *	Y
	)

static

Return true if X is contained by Y.

Definition at line 1677 of file BugReporter.cpp.

References clang::ParentMap::getParent(), and X.

Referenced by optimizeEdges().

◆ optimizeEdges()

static bool optimizeEdges	(	const PathDiagnosticConstruct &	C,
		PathPieces &	path,
		OptimizedCallsSet &	OCS
	)

static

Definition at line 1763 of file BugReporter.cpp.

References addContextEdges(), clang::C, getLengthOnSingleLine(), clang::LocationContext::getParentMap(), getStmtParent(), isConditionForTerminator(), clang::ParentMap::isConsumedExpr(), isIncrementOrInitInForLoop(), lexicalContains(), optimizeEdges(), removeContextCycles(), removeIdenticalEvents(), removePunyEdges(), simplifySimpleBranches(), and SM.

Referenced by optimizeEdges().

◆ populateExecutedLinesWithFunctionSignature()

static void populateExecutedLinesWithFunctionSignature	(	const Decl *	Signature,
		const SourceManager &	SM,
		FilesToLineNumsMap &	ExecutedLines
	)

static

Insert all lines participating in the function signature Signature into ExecutedLines.

Definition at line 3123 of file BugReporter.cpp.

References clang::SourceRange::getBegin(), clang::Decl::getBody(), clang::SourceRange::getEnd(), clang::Stmt::getSourceRange(), clang::SourceLocation::isValid(), and SM.

Referenced by findExecutedLines().

◆ populateExecutedLinesWithStmt()

static void populateExecutedLinesWithStmt	(	const Stmt *	S,
		const SourceManager &	SM,
		FilesToLineNumsMap &	ExecutedLines
	)

static

Definition at line 3148 of file BugReporter.cpp.

References clang::ento::DefinedSVal::isValid(), and SM.

Referenced by findExecutedLines().

◆ removeContextCycles()

static void removeContextCycles	(	PathPieces &	Path,
		const SourceManager &	SM
	)

static

Eliminate two-edge cycles created by addContextEdges().

Once all the context edges are in place, there are plenty of cases where there's a single edge from a top-level statement to a subexpression, followed by a single path note, and then a reverse edge to get back out to the top level. If the statement is simple enough, the subexpression edges just add noise and make it harder to understand what's going on.

This function only removes edges in pairs, because removing only one edge might leave other edges dangling.

This will not remove edges in more complicated situations:

if there is more than one "hop" leading to or from a subexpression.
if there is an inlined call between the edges instead of a single event.
if the whole statement is large enough that having subexpression arrows might be helpful.

Definition at line 1622 of file BugReporter.cpp.

References getLengthOnSingleLine(), and SM.

Referenced by optimizeEdges().

◆ removeEdgesToDefaultInitializers()

static void removeEdgesToDefaultInitializers ( PathPieces & Pieces )

static

Remove edges in and out of C++ default initializer expressions.

These are for fields that have in-class initializers, as opposed to being initialized explicitly in a constructor or braced list.

Definition at line 528 of file BugReporter.cpp.

References clang::C, clang::ento::CF, and removeEdgesToDefaultInitializers().

Referenced by removeEdgesToDefaultInitializers().

◆ removeIdenticalEvents()

static void removeIdenticalEvents ( PathPieces & path )

static

Definition at line 1740 of file BugReporter.cpp.

Referenced by optimizeEdges().

◆ removePiecesWithInvalidLocations()

static void removePiecesWithInvalidLocations ( PathPieces & Pieces )

static

Remove all pieces with invalid locations as these cannot be serialized.

We might have pieces with invalid locations as a result of inlining Body Farm generated functions.

Definition at line 562 of file BugReporter.cpp.

References clang::C, and removePiecesWithInvalidLocations().

Referenced by removePiecesWithInvalidLocations().

◆ removePopUpNotes()

static void removePopUpNotes ( PathPieces & Path )

static

Same logic as above to remove extra pieces.

Definition at line 476 of file BugReporter.cpp.

◆ removePunyEdges()

static void removePunyEdges	(	PathPieces &	path,
		const SourceManager &	SM,
		const ParentMap &	PM
	)

static

Definition at line 1687 of file BugReporter.cpp.

References clang::Stmt::getBeginLoc(), getLengthOnSingleLine(), clang::ParentMap::getParent(), isConditionForTerminator(), and SM.

Referenced by optimizeEdges().

◆ removeRedundantMsgs()

static void removeRedundantMsgs ( PathPieces & path )

static

An optimization pass over PathPieces that removes redundant diagnostics generated by both ConditionBRVisitor and TrackConstraintBRVisitor.

Both BugReporterVisitors use different methods to generate diagnostics, with one capable of emitting diagnostics in some cases but not in others. This can lead to redundant diagnostic pieces at the same point in a path.

Definition at line 373 of file BugReporter.cpp.

References clang::ento::PathDiagnosticPiece::Call, clang::ento::PathDiagnosticPiece::ControlFlow, clang::ento::PathDiagnosticPiece::Event, eventsDescribeSameCondition(), clang::ento::PathDiagnosticPiece::Macro, clang::ento::PathDiagnosticPiece::Note, clang::ento::PathDiagnosticPiece::PopUp, and removeRedundantMsgs().

Referenced by removeRedundantMsgs().

◆ removeUnneededCalls()

static bool removeUnneededCalls	(	const PathDiagnosticConstruct &	C,
		PathPieces &	pieces,
		const PathSensitiveBugReport *	R,
		bool	IsInteresting = `false`
	)

static

Recursively scan through a path and prune out calls and macros pieces that aren't needed.

Return true if afterwards the path contains "interesting stuff" which means it shouldn't be pruned from the parent path.

Definition at line 423 of file BugReporter.cpp.

References clang::C, clang::ento::PathDiagnosticPiece::Call, clang::ento::PathDiagnosticPiece::ControlFlow, clang::ento::PathDiagnosticPiece::Event, clang::ento::PathSensitiveBugReport::isInteresting(), clang::ento::PathDiagnosticPiece::Macro, clang::ento::PathDiagnosticPiece::Note, clang::ento::PathDiagnosticPiece::PopUp, and removeUnneededCalls().

Referenced by removeUnneededCalls().

◆ resetDiagnosticLocationToMainFile()

static void resetDiagnosticLocationToMainFile ( PathDiagnostic & PD )

static

Definition at line 3238 of file BugReporter.cpp.

◆ simplifySimpleBranches()

static void simplifySimpleBranches ( PathPieces & pieces )

static

Move edges from a branch condition to a branch target when the condition is simple.

This restructures some of the work of addContextEdges. That function creates edges this may destroy, but they work together to create a more aesthetically set of edges around branches. After the call to addContextEdges, we may have (1) an edge to the branch, (2) an edge from the branch to the branch condition, and (3) an edge from the branch condition to the branch target. We keep (1), but may wish to remove (2) and move the source of (3) to the branch if the branch condition is simple.

Definition at line 1502 of file BugReporter.cpp.

References clang::ento::PathDiagnosticControlFlowPiece::getEndLocation(), clang::ento::PathDiagnosticControlFlowPiece::getStartLocation(), clang::ento::PathDiagnosticLocation::getStmtOrNull(), clang::isa(), isConditionForTerminator(), clang::ento::PathDiagnosticControlFlowPiece::setStartLocation(), StrEnteringLoop, StrLoopBodyZero, StrLoopCollectionEmpty, and StrLoopRangeEmpty.

Referenced by optimizeEdges().

◆ STATISTIC() [1/2]

STATISTIC	(	MaxBugClassSize	,
		"The maximum number of bug reports in the same equivalence class"
	)

◆ STATISTIC() [2/2]

STATISTIC	(	MaxValidBugClassSize	,
		"The maximum number of bug reports in the same equivalence class " "where at least one report is valid (not suppressed)"
	)

◆ updateExecutedLinesWithDiagnosticPieces()

static void updateExecutedLinesWithDiagnosticPieces ( PathDiagnostic & PD )

static

Populate executes lines with lines containing at least one diagnostics.

Definition at line 1962 of file BugReporter.cpp.

References clang::ento::PathPieces::flatten(), clang::ento::PathDiagnostic::getExecutedLines(), clang::FileID::isValid(), P, and clang::ento::PathDiagnostic::path.

Variable Documentation

◆ StrEnteringLoop

constexpr llvm::StringLiteral StrEnteringLoop = "Entering loop body"

constexpr

Definition at line 1114 of file BugReporter.cpp.

Referenced by simplifySimpleBranches().

◆ StrLoopBodyZero

constexpr llvm::StringLiteral StrLoopBodyZero = "Loop body executed 0 times"

constexpr

Definition at line 1115 of file BugReporter.cpp.

Referenced by simplifySimpleBranches().

◆ StrLoopCollectionEmpty

constexpr llvm::StringLiteral StrLoopCollectionEmpty

constexpr

Initial value:

=

"Loop body skipped when collection is empty"

Definition at line 1118 of file BugReporter.cpp.

Referenced by simplifySimpleBranches().

◆ StrLoopRangeEmpty

constexpr llvm::StringLiteral StrLoopRangeEmpty

constexpr

Initial value:

=

"Loop body skipped when range is empty"

Definition at line 1116 of file BugReporter.cpp.

Referenced by simplifySimpleBranches().

Macros

Typedefs

Functions

Variables

Macro Definition Documentation

◆ DEBUG_TYPE

Typedef Documentation

◆ OptimizedCallsSet

Function Documentation

◆ addContextEdges()

◆ addEdgeToPath()

◆ adjustCallLocations()

◆ CompactMacroExpandedPieces()

◆ dropFunctionEntryEdge()

◆ eventsDescribeSameCondition()

◆ findExecutedLines()

◆ generateDiagnosticForBasicReport()

◆ generateEmptyDiagnosticForReport()

◆ generateVisitorsDiagnostics()

◆ getEnclosingParent()

◆ getEnclosingStmtLocation()

◆ getFirstStackedCallToHeaderFile()

◆ getLengthOnSingleLine() [1/2]

◆ getLengthOnSingleLine() [2/2]

◆ getStmtBeforeCond()

◆ getStmtParent()

◆ getTerminatorCondition()

◆ hasImplicitBody()

◆ insertToInterestingnessMap()

◆ isConditionForTerminator()

◆ isContainedByStmt()

◆ isDependency()

◆ isHidden()

◆ isIncrementOrInitInForLoop()

◆ isInLoopBody()

◆ isJumpToFalseBranch()

◆ isLoop()

◆ lexicalContains()

◆ optimizeEdges()

◆ populateExecutedLinesWithFunctionSignature()

◆ populateExecutedLinesWithStmt()

◆ removeContextCycles()

◆ removeEdgesToDefaultInitializers()

◆ removeIdenticalEvents()

◆ removePiecesWithInvalidLocations()

◆ removePopUpNotes()

◆ removePunyEdges()

◆ removeRedundantMsgs()

◆ removeUnneededCalls()

◆ resetDiagnosticLocationToMainFile()

◆ simplifySimpleBranches()

◆ STATISTIC() [1/2]

◆ STATISTIC() [2/2]

◆ updateExecutedLinesWithDiagnosticPieces()

Variable Documentation

◆ StrEnteringLoop

◆ StrLoopBodyZero

◆ StrLoopCollectionEmpty

◆ StrLoopRangeEmpty