1//== TaintTesterChecker.cpp ----------------------------------- -*- C++ -*--=// 2// 3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4// See https://llvm.org/LICENSE.txt for license information. 5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6// 7//===----------------------------------------------------------------------===// 8// 9// This checker can be used for testing how taint data is propagated. 10// 11//===----------------------------------------------------------------------===// 12 13#include "clang/StaticAnalyzer/Checkers/BuiltinCheckerRegistration.h" 14#include "clang/StaticAnalyzer/Checkers/Taint.h" 15#include "clang/StaticAnalyzer/Core/BugReporter/BugType.h" 16#include "clang/StaticAnalyzer/Core/Checker.h" 17#include "clang/StaticAnalyzer/Core/CheckerManager.h" 18#include "clang/StaticAnalyzer/Core/PathSensitive/CheckerContext.h" 19 20using namespace clang; 21using namespace ento; 22using namespace taint; 23 24namespace { 25class TaintTesterChecker : public Checker<check::PostStmt<Expr>> { 26 std::unique_ptr<BugType> BT = 27 std::make_unique<BugType>(this, "Tainted data", "General"); 28 29public: 30 void checkPostStmt(const Expr *E, CheckerContext &C) const; 31}; 32} 33 34void TaintTesterChecker::checkPostStmt(const Expr *E, 35 CheckerContext &C) const { 36 ProgramStateRef State = C.getState(); 37 if (!State) 38 return; 39 40 if (isTainted(State, E, C.getLocationContext())) { 41 if (ExplodedNode *N = C.generateNonFatalErrorNode()) { 42 auto report = std::make_unique<PathSensitiveBugReport>(*BT, "tainted", N); 43 report->addRange(E->getSourceRange()); 44 C.emitReport(std::move(report)); 45 } 46 } 47} 48 49void ento::registerTaintTesterChecker(CheckerManager &mgr) { 50 mgr.registerChecker<TaintTesterChecker>(); 51} 52 53bool ento::shouldRegisterTaintTesterChecker(const CheckerManager &mgr) { 54 return true; 55} 56