Analyzer: add support for CXXNewExpr.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@101771 91177308-0d34-0410-b5e6-96231b3b80d8

include/clang/Checker/PathSensitive/GRExprEngine.h

@@ -352,6 +352,9 @@ public:
   void VisitCXXMemberCallExpr(const CXXMemberCallExpr *MCE, ExplodedNode *Pred,
                               ExplodedNodeSet &Dst);
 
+  void VisitCXXNewExpr(CXXNewExpr *CNE, ExplodedNode *Pred,
+                       ExplodedNodeSet &Dst);
+
   void VisitAggExpr(const Expr *E, SVal Dest, ExplodedNode *Pred,
                     ExplodedNodeSet &Dst);
 

include/clang/Checker/PathSensitive/MemRegion.h

@@ -869,11 +869,11 @@ public:
   /// getElementRegion - Retrieve the memory region associated with the
   ///  associated element type, index, and super region.
   const ElementRegion *getElementRegion(QualType elementType, SVal Idx,
-                                  const MemRegion *superRegion,
-                                  ASTContext &Ctx);
+                                        const MemRegion *superRegion,
+                                        ASTContext &Ctx);
 
   const ElementRegion *getElementRegionWithSuper(const ElementRegion *ER,
-                                           const MemRegion *superRegion) {
+                                                 const MemRegion *superRegion) {
     return getElementRegion(ER->getElementType(), ER->getIndex(),
                             superRegion, ER->getContext());
   }

include/clang/Checker/PathSensitive/Store.h

@@ -129,11 +129,14 @@ public:
     CastResult(const GRState *s, const MemRegion* r = 0) : state(s), region(r){}
   };
 
+  const ElementRegion *GetElementZeroRegion(const MemRegion *R, QualType T);
+
   /// CastRegion - Used by GRExprEngine::VisitCast to handle casts from
   ///  a MemRegion* to a specific location type.  'R' is the region being
   ///  casted and 'CastToTy' the result type of the cast.
   const MemRegion *CastRegion(const MemRegion *region, QualType CastToTy);
 
+
   /// EvalBinOp - Perform pointer arithmetic.
   virtual SVal EvalBinOp(BinaryOperator::Opcode Op,
                          Loc lhs, NonLoc rhs, QualType resultTy) {

lib/Checker/GRExprEngine.cpp

@@ -593,7 +593,6 @@ void GRExprEngine::Visit(Stmt* S, ExplodedNode* Pred, ExplodedNodeSet& Dst) {
     case Stmt::CXXDependentScopeMemberExprClass:
     case Stmt::CXXExprWithTemporariesClass:
     case Stmt::CXXNamedCastExprClass:
-    case Stmt::CXXNewExprClass:
     case Stmt::CXXNullPtrLiteralExprClass:
     case Stmt::CXXPseudoDestructorExprClass:
     case Stmt::CXXTemporaryObjectExprClass:
@@ -719,6 +718,12 @@ void GRExprEngine::Visit(Stmt* S, ExplodedNode* Pred, ExplodedNodeSet& Dst) {
       break;
     }
 
+    case Stmt::CXXNewExprClass: {
+      CXXNewExpr *NE = cast<CXXNewExpr>(S);
+      VisitCXXNewExpr(NE, Pred, Dst);
+      break;
+    }
+
       // FIXME: ChooseExpr is really a constant.  We need to fix
       //        the CFG do not model them as explicit control-flow.
 
@@ -3365,6 +3370,33 @@ void GRExprEngine::VisitCXXMemberCallExpr(const CXXMemberCallExpr *MCE,
   }
 }
 
+void GRExprEngine::VisitCXXNewExpr(CXXNewExpr *CNE, ExplodedNode *Pred,
+                                   ExplodedNodeSet &Dst) {
+  if (CNE->isArray()) {
+    // FIXME: allocating an array has not been handled.
+    return;
+  }
+
+  unsigned Count = Builder->getCurrentBlockCount();
+  DefinedOrUnknownSVal SymVal = getValueManager().getConjuredSymbolVal(NULL,CNE, 
+                                                         CNE->getType(), Count);
+  const MemRegion *NewReg = cast<loc::MemRegionVal>(SymVal).getRegion();
+
+  QualType ObjTy = CNE->getType()->getAs<PointerType>()->getPointeeType();
+
+  const ElementRegion *EleReg = 
+                         getStoreManager().GetElementZeroRegion(NewReg, ObjTy);
+
+  const GRState *state = Pred->getState();
+
+  Store store = state->getStore();
+  StoreManager::InvalidatedSymbols IS;
+  store = getStoreManager().InvalidateRegion(store, EleReg, CNE, Count, &IS);
+  state = state->makeWithStore(store);
+  state = state->BindExpr(CNE, loc::MemRegionVal(EleReg));
+  MakeNode(Dst, CNE, Pred, state);
+}
+
 const CXXThisRegion *GRExprEngine::getCXXThisRegion(const CXXMethodDecl *D,
                                                  const StackFrameContext *SFC) {
   Type *T = D->getParent()->getTypeForDecl();

lib/Checker/RegionStore.cpp

@@ -346,8 +346,6 @@ public: // Part of public interface to class.
   Store CopyLazyBindings(nonloc::LazyCompoundVal V, Store store,
                          const TypedRegion *R);
 
-  const ElementRegion *GetElementZeroRegion(const MemRegion *R, QualType T);
-
   //===------------------------------------------------------------------===//
   // State pruning.
   //===------------------------------------------------------------------===//
@@ -995,14 +993,6 @@ static bool IsReinterpreted(QualType RTy, QualType UsedTy, ASTContext &Ctx) {
   return true;
 }
 
-const ElementRegion *
-RegionStoreManager::GetElementZeroRegion(const MemRegion *R, QualType T) {
-  ASTContext &Ctx = getContext();
-  SVal idx = ValMgr.makeZeroArrayIndex();
-  assert(!T.isNull());
-  return MRMgr.getElementRegion(T, idx, R, Ctx);
-}
-
 SVal RegionStoreManager::Retrieve(Store store, Loc L, QualType T) {
   assert(!isa<UnknownVal>(L) && "location unknown");
   assert(!isa<UndefinedVal>(L) && "location undefined");

lib/Checker/Store.cpp

@@ -38,6 +38,13 @@ static bool IsCompleteType(ASTContext &Ctx, QualType Ty) {
   return true;
 }
 
+const ElementRegion *StoreManager::GetElementZeroRegion(const MemRegion *R, 
+                                                        QualType T) {
+  SVal idx = ValMgr.makeZeroArrayIndex();
+  assert(!T.isNull());
+  return MRMgr.getElementRegion(T, idx, R, Ctx);
+}
+
 const MemRegion *StoreManager::CastRegion(const MemRegion *R, QualType CastToTy) {
 
   ASTContext& Ctx = StateMgr.getContext();