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
checkPostStmt(const Expr * E,CheckerContext & C) const33 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>(BT, "tainted", N);
42 report->addRange(E->getSourceRange());
43 C.emitReport(std::move(report));
44 }
45 }
46 }
47
registerTaintTesterChecker(CheckerManager & mgr)48 void ento::registerTaintTesterChecker(CheckerManager &mgr) {
49 mgr.registerChecker<TaintTesterChecker>();
50 }
51
shouldRegisterTaintTesterChecker(const CheckerManager & mgr)52 bool ento::shouldRegisterTaintTesterChecker(const CheckerManager &mgr) {
53 return true;
54 }
55