[analyzer] Leaks should be uniqued by the allocation point in the

closest function context (RetainCountChecker).

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@151661 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 16 insertions, 4 deletions

diff --git a/lib/StaticAnalyzer/Checkers/RetainCountChecker.cpp b/lib/StaticAnalyzer/Checkers/RetainCountChecker.cpp
index 2350298b63..6b14013eea 100644
--- a/lib/StaticAnalyzer/Checkers/RetainCountChecker.cpp
+++ b/lib/StaticAnalyzer/Checkers/RetainCountChecker.cpp
@@ -2114,14 +2114,16 @@ namespace {
   };
 }
 
+// Find the first node in the current function context that referred to the
+// tracked symbol and the memory location that value was stored to. Note, the
+// value is only reported if the allocation occurred in the same function as
+// the leak.
 static std::pair<const ExplodedNode*,const MemRegion*>
 GetAllocationSite(ProgramStateManager& StateMgr, const ExplodedNode *N,
                   SymbolRef Sym) {
-
-  // Find both first node that referred to the tracked symbol and the
-  // memory location that value was store to.
   const ExplodedNode *Last = N;
   const MemRegion* FirstBinding = 0;
+  const LocationContext *LeakContext = N->getLocationContext();
 
   while (N) {
     ProgramStateRef St = N->getState();
@@ -2134,10 +2136,20 @@ GetAllocationSite(ProgramStateManager& StateMgr, const ExplodedNode *N,
     StateMgr.iterBindings(St, FB);
     if (FB) FirstBinding = FB.getRegion();
 
-    Last = N;
+    // Allocation node, is the last node in the current context in which the
+    // symbol was tracked.
+    if (N->getLocationContext() == LeakContext)
+      Last = N;
+
     N = N->pred_empty() ? NULL : *(N->pred_begin());
   }
 
+  // If allocation happened in a function different from the leak node context,
+  // do not report the binding.
+  if (N->getLocationContext() != LeakContext) {
+    FirstBinding = 0;
+  }
+
   return std::make_pair(Last, FirstBinding);
 }