24 using namespace clang;
29 class CXXSelfAssignmentChecker :
public Checker<check::BeginFunction> {
31 CXXSelfAssignmentChecker();
32 void checkBeginFunction(CheckerContext &C)
const;
36 CXXSelfAssignmentChecker::CXXSelfAssignmentChecker() {}
38 void CXXSelfAssignmentChecker::checkBeginFunction(CheckerContext &C)
const {
41 const auto *LCtx =
C.getLocationContext();
42 const auto *MD = dyn_cast<CXXMethodDecl>(LCtx->getDecl());
45 if (!MD->isCopyAssignmentOperator() && !MD->isMoveAssignmentOperator())
47 auto &
State =
C.getState();
48 auto &SVB =
C.getSValBuilder();
50 State->getSVal(SVB.getCXXThis(MD, LCtx->getStackFrame()));
51 auto Param = SVB.makeLoc(
State->getRegion(MD->getParamDecl(0), LCtx));
52 auto ParamVal =
State->getSVal(Param);
55 const NoteTag *SelfAssignTag =
56 C.getNoteTag([MD](PathSensitiveBugReport &BR) ->
std::string {
58 llvm::raw_svector_ostream Out(Msg);
59 Out <<
"Assuming " << MD->getParamDecl(0)->getName() <<
" == *this";
62 C.addTransition(SelfAssignState, SelfAssignTag);
65 const NoteTag *NonSelfAssignTag =
66 C.getNoteTag([MD](PathSensitiveBugReport &BR) ->
std::string {
68 llvm::raw_svector_ostream Out(Msg);
69 Out <<
"Assuming " << MD->getParamDecl(0)->getName() <<
" != *this";
72 C.addTransition(NonSelfAssignState, NonSelfAssignTag);
75 void ento::registerCXXSelfAssignmentChecker(CheckerManager &Mgr) {
76 Mgr.registerChecker<CXXSelfAssignmentChecker>();
79 bool ento::shouldRegisterCXXSelfAssignmentChecker(
const CheckerManager &mgr) {