Analyzer: add support for CXXNewExpr.

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

3 files changed, 40 insertions, 11 deletions

diff --git a/lib/Checker/GRExprEngine.cpp b/lib/Checker/GRExprEngine.cpp
index 405c931e04..b6b4caadd3 100644
--- a/lib/Checker/GRExprEngine.cpp
+++ b/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();
diff --git a/lib/Checker/RegionStore.cpp b/lib/Checker/RegionStore.cpp
index 5e71bb0b3c..73158f2955 100644
--- a/lib/Checker/RegionStore.cpp
+++ b/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");
diff --git a/lib/Checker/Store.cpp b/lib/Checker/Store.cpp
index 80b6586b8b..c12065b89a 100644
--- a/lib/Checker/Store.cpp
+++ b/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();