void UndefinedAssignmentChecker::checkBind(SVal location, SVal val,
CheckerContext &C) const {
if (!val.isUndef())
return;
ExplodedNode *N = C.generateSink();
if (!N)
return;
const char *str = "Assigned value is garbage or undefined";
if (!BT)
BT.reset(new BuiltinBug(str));
// Generate a report for this bug.
const Expr *ex = 0;
const Stmt *StoreE = C.getStmt();
while (StoreE) {
if (const BinaryOperator *B = dyn_cast<BinaryOperator>(StoreE)) {
if (B->isCompoundAssignmentOp()) {
const GRState *state = C.getState();
if (state->getSVal(B->getLHS()).isUndef()) {
str = "The left expression of the compound assignment is an "
"uninitialized value. The computed value will also be garbage";
ex = B->getLHS();
break;
}
}
ex = B->getRHS();
break;
}
if (const DeclStmt *DS = dyn_cast<DeclStmt>(StoreE)) {
const VarDecl* VD = dyn_cast<VarDecl>(DS->getSingleDecl());
ex = VD->getInit();
}
break;
}
EnhancedBugReport *R = new EnhancedBugReport(*BT, str, N);
if (ex) {
R->addRange(ex->getSourceRange());
R->addVisitorCreator(bugreporter::registerTrackNullOrUndefValue, ex);
}
C.EmitReport(R);
}
