CastSizeChecker checks when casting a malloc'ed symbolic region to type T,

whether the size of the symbolic region is a multiple of the size of T.
Fixes PR6123 and PR7217.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@104584 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 12 insertions, 7 deletions

diff --git a/lib/Checker/RegionStore.cpp b/lib/Checker/RegionStore.cpp
index 1e15d43a5a..0e4c4439f3 100644
--- a/lib/Checker/RegionStore.cpp
+++ b/lib/Checker/RegionStore.cpp
@@ -364,7 +364,18 @@ public: // Part of public interface to class.
   // Region "extents".
   //===------------------------------------------------------------------===//
 
-  const GRState *setExtent(const GRState *state,const MemRegion* R,SVal Extent);
+  const GRState *setExtent(const GRState *state,const MemRegion* R,SVal Extent){
+    return state->set<RegionExtents>(R, Extent);
+  }
+
+  Optional<SVal> getExtent(const GRState *state, const MemRegion *R) {
+    const SVal *V = state->get<RegionExtents>(R);
+    if (V)
+      return *V;
+    else
+      return Optional<SVal>();
+  }
+
   DefinedOrUnknownSVal getSizeInElements(const GRState *state,
                                          const MemRegion* R, QualType EleTy);
 
@@ -798,12 +809,6 @@ DefinedOrUnknownSVal RegionStoreManager::getSizeInElements(const GRState *state,
   return UnknownVal();
 }
 
-const GRState *RegionStoreManager::setExtent(const GRState *state,
-                                             const MemRegion *region,
-                                             SVal extent) {
-  return state->set<RegionExtents>(region, extent);
-}
-
 //===----------------------------------------------------------------------===//
 // Location and region casting.
 //===----------------------------------------------------------------------===//