| 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 | const BugType BT{this, "Tainted data", "General"}; |
| 27 | |
| 28 | public: |
| 29 | void checkPostStmt(const Expr *E, CheckerContext &C) const; |
| 30 | }; |
| 31 | } |
| 32 | |
| 33 | void TaintTesterChecker::checkPostStmt(const Expr *E, |
| 34 | CheckerContext &C) const { |
| 35 | ProgramStateRef State = C.getState(); |
| 36 | if (!State) |
| 37 | return; |
| 38 | |
| 39 | if (isTainted(State, E, C.getLocationContext())) { |
| 40 | if (ExplodedNode *N = C.generateNonFatalErrorNode()) { |
| 41 | auto report = std::make_unique<PathSensitiveBugReport>(args: BT, args: "tainted", args&: N); |
| 42 | report->addRange(R: E->getSourceRange()); |
| 43 | C.emitReport(R: std::move(report)); |
| 44 | } |
| 45 | } |
| 46 | } |
| 47 | |
| 48 | void ento::registerTaintTesterChecker(CheckerManager &mgr) { |
| 49 | mgr.registerChecker<TaintTesterChecker>(); |
| 50 | } |
| 51 | |
| 52 | bool ento::shouldRegisterTaintTesterChecker(const CheckerManager &mgr) { |
| 53 | return true; |
| 54 | } |
| 55 |