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 20 using namespace clang; 21 using namespace ento; 22 using namespace taint; 23 24 namespace { 25 class TaintTesterChecker : public Checker<check::PostStmt<Expr>> { 26 std::unique_ptr<BugType> BT = 27 std::make_unique<BugType>(this, "Tainted data", "General"); 28 29 public: 30 void checkPostStmt(const Expr *E, CheckerContext &C) const; 31 }; 32 } 33 34 void 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 49 void ento::registerTaintTesterChecker(CheckerManager &mgr) { 50 mgr.registerChecker<TaintTesterChecker>(); 51 } 52 53 bool ento::shouldRegisterTaintTesterChecker(const CheckerManager &mgr) { 54 return true; 55 } 56