diff options
Diffstat (limited to 'contrib/llvm/tools/clang/include/clang/StaticAnalyzer/Core/BugReporter/BugReporterVisitor.h')
-rw-r--r-- | contrib/llvm/tools/clang/include/clang/StaticAnalyzer/Core/BugReporter/BugReporterVisitor.h | 58 |
1 files changed, 53 insertions, 5 deletions
diff --git a/contrib/llvm/tools/clang/include/clang/StaticAnalyzer/Core/BugReporter/BugReporterVisitor.h b/contrib/llvm/tools/clang/include/clang/StaticAnalyzer/Core/BugReporter/BugReporterVisitor.h index f53c15f..78e35ca 100644 --- a/contrib/llvm/tools/clang/include/clang/StaticAnalyzer/Core/BugReporter/BugReporterVisitor.h +++ b/contrib/llvm/tools/clang/include/clang/StaticAnalyzer/Core/BugReporter/BugReporterVisitor.h @@ -100,7 +100,6 @@ class FindLastStoreBRVisitor const MemRegion *R; SVal V; bool satisfied; - const ExplodedNode *StoreSite; public: /// \brief Convenience method to create a visitor given only the MemRegion. @@ -114,7 +113,7 @@ public: static void registerStatementVarDecls(BugReport &BR, const Stmt *S); FindLastStoreBRVisitor(SVal v, const MemRegion *r) - : R(r), V(v), satisfied(false), StoreSite(0) { + : R(r), V(v), satisfied(false) { assert (!V.isUnknown() && "Cannot track unknown value."); // TODO: Does it make sense to allow undef values here? @@ -142,6 +141,10 @@ public: void Profile(llvm::FoldingSetNodeID &ID) const; + /// Return the tag associated with this visitor. This tag will be used + /// to make all PathDiagnosticPieces created by this visitor. + static const char *getTag(); + PathDiagnosticPiece *VisitNode(const ExplodedNode *N, const ExplodedNode *PrevN, BugReporterContext &BRC, @@ -171,6 +174,9 @@ public: ID.AddPointer(&x); } + /// Return the tag associated with this visitor. This tag will be used + /// to make all PathDiagnosticPieces created by this visitor. + static const char *getTag(); virtual PathDiagnosticPiece *VisitNode(const ExplodedNode *N, const ExplodedNode *Prev, @@ -223,15 +229,57 @@ public: const ExplodedNode *N, llvm::Optional<bool> &prunable); }; - + +/// \brief When a region containing undefined value or '0' value is passed +/// as an argument in a call, marks the call as interesting. +/// +/// As a result, BugReporter will not prune the path through the function even +/// if the region's contents are not modified/accessed by the call. +class UndefOrNullArgVisitor + : public BugReporterVisitorImpl<UndefOrNullArgVisitor> { + + /// The interesting memory region this visitor is tracking. + const MemRegion *R; + +public: + UndefOrNullArgVisitor(const MemRegion *InR) : R(InR) {} + + virtual void Profile(llvm::FoldingSetNodeID &ID) const { + static int Tag = 0; + ID.AddPointer(&Tag); + ID.AddPointer(R); + } + + PathDiagnosticPiece *VisitNode(const ExplodedNode *N, + const ExplodedNode *PrevN, + BugReporterContext &BRC, + BugReport &BR); +}; + namespace bugreporter { -void addTrackNullOrUndefValueVisitor(const ExplodedNode *N, const Stmt *S, - BugReport *R); +/// Attempts to add visitors to trace a null or undefined value back to its +/// point of origin, whether it is a symbol constrained to null or an explicit +/// assignment. +/// +/// \param N A node "downstream" from the evaluation of the statement. +/// \param S The statement whose value is null or undefined. +/// \param R The bug report to which visitors should be attached. +/// \param IsArg Whether the statement is an argument to an inlined function. +/// If this is the case, \p N \em must be the CallEnter node for +/// the function. +/// +/// \return Whether or not the function was able to add visitors for this +/// statement. Note that returning \c true does not actually imply +/// that any visitors were added. +bool trackNullOrUndefValue(const ExplodedNode *N, const Stmt *S, BugReport &R, + bool IsArg = false); const Stmt *GetDerefExpr(const ExplodedNode *N); const Stmt *GetDenomExpr(const ExplodedNode *N); const Stmt *GetRetValExpr(const ExplodedNode *N); +bool isDeclRefExprToReference(const Expr *E); + } // end namespace clang } // end namespace ento |