void ConstCastAwayChecker::checkPreStmt(const clang::ExplicitCastExpr *CE,
clang::ento::CheckerContext &C) const
{
if (! ( clang::CStyleCastExpr::classof(CE) || clang::CXXConstCastExpr::classof(CE) ))
return;
const Expr * SE = CE->getSubExpr();
const CXXRecordDecl * CRD = nullptr;
std::string cname;
if (SE->getType()->isPointerType())
CRD = SE->getType()->getPointeeCXXRecordDecl();
else
CRD = SE->getType()->getAsCXXRecordDecl();
if (CRD)
cname = CRD->getQualifiedNameAsString();
clang::ASTContext &Ctx = C.getASTContext();
clang::QualType OrigTy = Ctx.getCanonicalType(SE->getType());
clang::QualType ToTy = Ctx.getCanonicalType(CE->getType());
if ( support::isConst( OrigTy ) && ! support::isConst(ToTy) ) {
if ( clang::ento::ExplodedNode *errorNode = C.generateErrorNode()) {
if (!BT)
BT.reset(new clang::ento::BugType(this,"const cast away","ConstThreadSafety"));
std::string buf;
llvm::raw_string_ostream os(buf);
os << "const qualifier was removed via a cast, this may result in thread-unsafe code.";
std::unique_ptr<clang::ento::BugReport> R = llvm::make_unique<clang::ento::BugReport>(*BT,
os.str(), errorNode);
R->addRange(CE->getSourceRange());
if ( ! m_exception.reportConstCastAway( *R, C ) )
return;
C.emitReport(std::move(R));
if (cname == "")
return;
std::string tname ="constcastaway-checker.txt.unsorted";
std::string tolog ="flagged class '"+cname+"' const qualifier cast away";
support::writeLog(tolog,tname);
}
}
}
void ConstCastChecker::checkPreStmt(const clang::CXXConstCastExpr *CE,
clang::ento::CheckerContext &C) const
{
const Expr * SE = CE->getSubExprAsWritten();
const CXXRecordDecl * CRD = 0;
if (SE->getType()->isPointerType()) CRD = SE->getType()->getPointeeCXXRecordDecl();
else CRD = SE->getType()->getAsCXXRecordDecl();
if (CRD) {
std::string cname = CRD->getQualifiedNameAsString();
if (! support::isDataClass(cname) ) return;
}
if (clang::ento::ExplodedNode *errorNode = C.generateSink()) {
if (!BT) BT.reset(new clang::ento::BugType(this,"const_cast used on a pointer to a data class ", "ThreadSafety"));
clang::ento::BugReport *R = new clang::ento::BugReport(*BT,
"const_cast was used on a pointer to a data class ", errorNode);
R->addRange(CE->getSourceRange());
if ( ! m_exception.reportConstCast( *R, C ) )
return;
C.emitReport(R);
}
}
void ConstCastAwayChecker::checkPreStmt(const clang::ExplicitCastExpr *CE,
clang::ento::CheckerContext &C) const
{
const clang::Expr *E = CE->getSubExpr();
clang::ASTContext &Ctx = C.getASTContext();
clang::QualType OrigTy = Ctx.getCanonicalType(E->getType());
clang::QualType ToTy = Ctx.getCanonicalType(CE->getType());
if ( support::isConst( OrigTy ) && ! support::isConst(ToTy) ) {
if ( clang::ento::ExplodedNode *errorNode = C.generateSink()) {
if (!BT)
BT.reset(
new clang::ento::BugType("const cast away",
"ThreadSafety"));
clang::ento::BugReport *R = new clang::ento::BugReport(*BT,
"const qualifier was removed via a cast, this may result in thread-unsafe code.", errorNode);
R->addRange(CE->getSourceRange());
if ( ! m_exception.reportConstCastAway( *R, C ) )
return;
C.emitReport(R);
}
}
}