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In-Reply-To: <llvm/llvm-project/pull/67663/cl...@github.com>
================
@@ -84,33 +104,74 @@ class InvalidPtrChecker
REGISTER_SET_WITH_PROGRAMSTATE(InvalidMemoryRegions, const MemRegion *)
// Stores the region of the environment pointer of 'main' (if present).
-REGISTER_TRAIT_WITH_PROGRAMSTATE(EnvPtrRegion, const MemRegion *)
+REGISTER_TRAIT_WITH_PROGRAMSTATE(MainEnvPtrRegion, const MemRegion *)
+
+// Stores the regions of environments returned by getenv calls.
+REGISTER_SET_WITH_PROGRAMSTATE(GetenvEnvPtrRegions, const MemRegion *)
// Stores key-value pairs, where key is function declaration and value is
// pointer to memory region returned by previous call of this function
REGISTER_MAP_WITH_PROGRAMSTATE(PreviousCallResultMap, const FunctionDecl *,
const MemRegion *)
+const NoteTag *InvalidPtrChecker::createEnvInvalidationNote(
+ CheckerContext &C, ProgramStateRef State, StringRef FunctionName) const {
+
+ const MemRegion *MainRegion = State->get<MainEnvPtrRegion>();
+ const auto GetenvRegions = State->get<GetenvEnvPtrRegions>();
+
+ return C.getNoteTag([this, MainRegion, GetenvRegions,
+ FunctionName = std::string{FunctionName}](
+ PathSensitiveBugReport &BR, llvm::raw_ostream &Out) {
+ // Only handle the BugType of this checker.
+ if (&BR.getBugType() != &InvalidPtrBugType)
+ return;
+
+ // Mark all regions that were interesting before as NOT interesting now
+ // to avoid extra notes coming from invalidation points higher up the
+ // bugpath. This ensures, that only the last invalidation point is marked
----------------
DonatNagyE wrote:
```suggestion
// bugpath. This ensures that only the last invalidation point is marked
```
https://github.com/llvm/llvm-project/pull/67663
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