================
@@ -0,0 +1,73 @@
+#include "clang/StaticAnalyzer/Checkers/BuiltinCheckerRegistration.h"
+#include "clang/StaticAnalyzer/Core/Checker.h"
+#include "clang/StaticAnalyzer/Core/PathSensitive/CallDescription.h"
+#include "clang/StaticAnalyzer/Core/PathSensitive/CallEvent.h"
+#include "clang/StaticAnalyzer/Core/PathSensitive/CheckerContext.h"
+#include <AllocationState.h>
+
+using namespace clang;
+using namespace ento;
+
+REGISTER_MAP_WITH_PROGRAMSTATE(LifetimeBoundMap, const MemRegion *,
+ const MemRegion *);
+
+class LifetimeAnnotations : public Checker<check::PostCall> {
+public:
+ void checkPostCall(const CallEvent &Call, CheckerContext &C) const;
+ void printState(raw_ostream &Out, ProgramStateRef State, const char *NL,
+ const char *Sep) const override;
+};
+
+void LifetimeAnnotations::checkPostCall(const CallEvent &Call,
+ CheckerContext &C) const {
+ ProgramStateRef State = C.getState();
+
+ const auto *MethodDecl = dyn_cast_if_present<CXXMethodDecl>(Call.getDecl());
+
+ if (!MethodDecl)
+ return;
+
+ unsigned LBParamIdx = MethodDecl->getNumParams();
+ for (unsigned i = 0; i < MethodDecl->getNumParams(); i++) {
+ if (MethodDecl->getParamDecl(i)->hasAttr<LifetimeBoundAttr>()) {
+ LBParamIdx = i;
+ break;
+ }
+ }
+ if (LBParamIdx == MethodDecl->getNumParams())
+ return;
+
+ SVal RetVal = Call.getReturnValue();
+ const MemRegion *RetValRegion = RetVal.getAsRegion();
+ if (!RetValRegion)
+ return;
----------------
benedekaibas wrote:
> Is it possible to map the `SVal`s, and not the regions?
`SVal`s can be used in a map. `CStringChecker` uses the `SVal` as a value in
its map. Since we are interested in where a return borrows from we need the
`SVal` to be in the map as a key. I have look up checkers by searching for
program state maps using `SVal`s as keys, but I could not find one so far. I
have faced the following issue when I tried to make the map work with `SVal` as
a key: https://github.com/llvm/llvm-project/pull/200145#issuecomment-4576231367.
https://github.com/llvm/llvm-project/pull/200145
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