llvm/clang/lib/StaticAnalyzer/Checkers/PointerSubChecker.cpp

//=== PointerSubChecker.cpp - Pointer subtraction checker ------*- 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 files defines PointerSubChecker, a builtin checker that checks for
// pointer subtractions on two pointers pointing to different memory chunks.
// This check corresponds to CWE-469.
//
//===----------------------------------------------------------------------===//

#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"
#include "clang/StaticAnalyzer/Core/PathSensitive/DynamicExtent.h"
#include "llvm/ADT/StringRef.h"
#include "llvm/Support/FormatVariadic.h"

usingnamespaceclang;
usingnamespaceento;

namespace {
class PointerSubChecker
  : public Checker< check::PreStmt<BinaryOperator> > { … };
}

void PointerSubChecker::checkPreStmt(const BinaryOperator *B,
                                     CheckerContext &C) const { … }

void ento::registerPointerSubChecker(CheckerManager &mgr) { … }

bool ento::shouldRegisterPointerSubChecker(const CheckerManager &mgr) { … }