Coverage Report

Created: 2022-01-22 13:19

/Users/buildslave/jenkins/workspace/coverage/llvm-project/clang/lib/StaticAnalyzer/Checkers/TaintTesterChecker.cpp
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//== TaintTesterChecker.cpp ----------------------------------- -*- C++ -*--=//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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//
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// This checker can be used for testing how taint data is propagated.
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//
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//===----------------------------------------------------------------------===//
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#include "Taint.h"
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#include "clang/StaticAnalyzer/Checkers/BuiltinCheckerRegistration.h"
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#include "clang/StaticAnalyzer/Core/BugReporter/BugType.h"
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#include "clang/StaticAnalyzer/Core/Checker.h"
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#include "clang/StaticAnalyzer/Core/CheckerManager.h"
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#include "clang/StaticAnalyzer/Core/PathSensitive/CheckerContext.h"
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using namespace clang;
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using namespace ento;
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using namespace taint;
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namespace {
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class TaintTesterChecker : public Checker< check::PostStmt<Expr> > {
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  mutable std::unique_ptr<BugType> BT;
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  void initBugType() const;
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  /// Given a pointer argument, get the symbol of the value it contains
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  /// (points to).
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  SymbolRef getPointedToSymbol(CheckerContext &C,
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                               const Expr* Arg,
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                               bool IssueWarning = true) const;
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public:
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  void checkPostStmt(const Expr *E, CheckerContext &C) const;
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};
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}
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inline void TaintTesterChecker::initBugType() const {
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  if (!BT)
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    BT.reset(new BugType(this, "Tainted data", "General"));
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}
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void TaintTesterChecker::checkPostStmt(const Expr *E,
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                                       CheckerContext &C) const {
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  ProgramStateRef State = C.getState();
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  if (!State)
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    return;
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  if (isTainted(State, E, C.getLocationContext())) {
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    if (ExplodedNode *N = C.generateNonFatalErrorNode()) {
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      initBugType();
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      auto report = std::make_unique<PathSensitiveBugReport>(*BT, "tainted", N);
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      report->addRange(E->getSourceRange());
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      C.emitReport(std::move(report));
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    }
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  }
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}
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void ento::registerTaintTesterChecker(CheckerManager &mgr) {
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  mgr.registerChecker<TaintTesterChecker>();
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}
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bool ento::shouldRegisterTaintTesterChecker(const CheckerManager &mgr) {
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  return true;
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}