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