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usr / src / contrib / llvm-project / clang / lib / StaticAnalyzer / Checkers /

📁 ..
📄 AllocationState.h(1.41 KB)
📄 AnalysisOrderChecker.cpp(8.62 KB)
📄 AnalyzerStatsChecker.cpp(5.04 KB)
📄 ArrayBoundChecker.cpp(3.22 KB)
📄 ArrayBoundCheckerV2.cpp(13.07 KB)
📄 BasicObjCFoundationChecks.cpp(43.82 KB)
📄 BlockInCriticalSectionChecker.cpp(6.69 KB)
📄 BoolAssignmentChecker.cpp(3.45 KB)
📄 BuiltinFunctionChecker.cpp(5 KB)
📄 CStringChecker.cpp(93.24 KB)
📄 CStringSyntaxChecker.cpp(9.8 KB)
📄 CXXSelfAssignmentChecker.cpp(3.08 KB)
📄 CallAndMessageChecker.cpp(26.57 KB)
📄 CastSizeChecker.cpp(4.96 KB)
📄 CastToStructChecker.cpp(4.43 KB)
📄 CastValueChecker.cpp(19.65 KB)
📄 CheckObjCDealloc.cpp(37.83 KB)
📄 CheckObjCInstMethSignature.cpp(4.8 KB)
📄 CheckPlacementNew.cpp(11.91 KB)
📄 CheckSecuritySyntaxOnly.cpp(38.79 KB)
📄 CheckSizeofPointer.cpp(3.16 KB)
📄 CheckerDocumentation.cpp(14.64 KB)
📄 ChrootChecker.cpp(4.88 KB)
📄 CloneChecker.cpp(8.28 KB)
📄 ContainerModeling.cpp(39.85 KB)
📄 ConversionChecker.cpp(7.11 KB)
📄 DeadStoresChecker.cpp(17.82 KB)
📄 DebugCheckers.cpp(10.41 KB)
📄 DebugContainerModeling.cpp(4.94 KB)
📄 DebugIteratorModeling.cpp(5.15 KB)
📄 DeleteWithNonVirtualDtorChecker.cpp(5.35 KB)
📄 DereferenceChecker.cpp(10.54 KB)
📄 DirectIvarAssignment.cpp(8.02 KB)
📄 DivZeroChecker.cpp(3.42 KB)
📄 DynamicTypeChecker.cpp(7.31 KB)
📄 DynamicTypePropagation.cpp(42.11 KB)
📄 EnumCastOutOfRangeChecker.cpp(5.75 KB)
📄 ExprInspectionChecker.cpp(15.6 KB)
📄 FixedAddressChecker.cpp(2.33 KB)
📄 FuchsiaHandleChecker.cpp(23.1 KB)
📄 GCDAntipatternChecker.cpp(7.85 KB)
📄 GTestChecker.cpp(10.52 KB)
📄 GenericTaintChecker.cpp(34.31 KB)
📄 IdenticalExprChecker.cpp(18.88 KB)
📄 InnerPointerChecker.cpp(11.54 KB)
📄 InterCheckerAPI.h(1.09 KB)
📄 InvalidatedIteratorChecker.cpp(4.93 KB)
📄 Iterator.cpp(10.62 KB)
📄 Iterator.h(6.32 KB)
📄 IteratorModeling.cpp(31.33 KB)
📄 IteratorRangeChecker.cpp(12.64 KB)
📄 IvarInvalidationChecker.cpp(27.63 KB)
📄 LLVMConventionsChecker.cpp(9.9 KB)
📄 LocalizationChecker.cpp(52.38 KB)
📄 MIGChecker.cpp(11.3 KB)
📁 MPI-Checker
📄 MacOSKeychainAPIChecker.cpp(25.21 KB)
📄 MacOSXAPIChecker.cpp(6.61 KB)
📄 MallocChecker.cpp(127.38 KB)
📄 MallocOverflowSecurityChecker.cpp(11.91 KB)
📄 MallocSizeofChecker.cpp(8.03 KB)
📄 MismatchedIteratorChecker.cpp(11.01 KB)
📄 MmapWriteExecChecker.cpp(3.22 KB)
📄 Move.h(1.07 KB)
📄 MoveChecker.cpp(27 KB)
📄 NSAutoreleasePoolChecker.cpp(2.93 KB)
📄 NSErrorChecker.cpp(10.6 KB)
📄 NoReturnFunctionChecker.cpp(5.48 KB)
📄 NonNullParamChecker.cpp(11.22 KB)
📄 NonnullGlobalConstantsChecker.cpp(5.09 KB)
📄 NullabilityChecker.cpp(46.95 KB)
📄 NumberObjectConversionChecker.cpp(13.69 KB)
📄 OSObjectCStyleCast.cpp(3.14 KB)
📄 ObjCAtSyncChecker.cpp(3.34 KB)
📄 ObjCAutoreleaseWriteChecker.cpp(8.62 KB)
📄 ObjCContainersASTChecker.cpp(5.5 KB)
📄 ObjCContainersChecker.cpp(6.71 KB)
📄 ObjCMissingSuperCallChecker.cpp(9.23 KB)
📄 ObjCPropertyChecker.cpp(3.03 KB)
📄 ObjCSelfInitChecker.cpp(16.21 KB)
📄 ObjCSuperDeallocChecker.cpp(9.33 KB)
📄 ObjCUnusedIVarsChecker.cpp(6.01 KB)
📄 PaddingChecker.cpp(14.26 KB)
📄 PointerArithChecker.cpp(12.18 KB)
📄 PointerIterationChecker.cpp(3.79 KB)
📄 PointerSortingChecker.cpp(4.5 KB)
📄 PointerSubChecker.cpp(2.56 KB)
📄 PthreadLockChecker.cpp(28.42 KB)
📁 RetainCountChecker
📄 ReturnPointerRangeChecker.cpp(3.39 KB)
📄 ReturnUndefChecker.cpp(4.1 KB)
📄 ReturnValueChecker.cpp(5.79 KB)
📄 RunLoopAutoreleaseLeakChecker.cpp(7.2 KB)
📄 STLAlgorithmModeling.cpp(7 KB)
📄 SimpleStreamChecker.cpp(9.43 KB)
📄 SmartPtr.h(1.17 KB)
📄 SmartPtrChecker.cpp(2.68 KB)
📄 SmartPtrModeling.cpp(8.05 KB)
📄 StackAddrEscapeChecker.cpp(15 KB)
📄 StdLibraryFunctionsChecker.cpp(74.86 KB)
📄 StreamChecker.cpp(37.36 KB)
📄 Taint.cpp(9.04 KB)
📄 Taint.h(4.19 KB)
📄 TaintTesterChecker.cpp(2.17 KB)
📄 TestAfterDivZeroChecker.cpp(8.19 KB)
📄 TraversalChecker.cpp(4.38 KB)
📄 TrustNonnullChecker.cpp(9.12 KB)
📄 UndefBranchChecker.cpp(3.82 KB)
📄 UndefCapturedBlockVarChecker.cpp(3.64 KB)
📄 UndefResultChecker.cpp(7.19 KB)
📄 UndefinedArraySubscriptChecker.cpp(2.36 KB)
📄 UndefinedAssignmentChecker.cpp(3.74 KB)
📁 UninitializedObject
📄 UnixAPIChecker.cpp(18.05 KB)
📄 UnreachableCodeChecker.cpp(9.59 KB)
📄 VLASizeChecker.cpp(10.95 KB)
📄 ValistChecker.cpp(15.65 KB)
📄 VforkChecker.cpp(7.67 KB)
📄 VirtualCallChecker.cpp(8.11 KB)
📁 WebKit
📄 Yaml.h(2.06 KB)
📁 cert

Editing: DeleteWithNonVirtualDtorChecker.cpp

//===-- DeleteWithNonVirtualDtorChecker.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
//
//===----------------------------------------------------------------------===//
//
// Defines a checker for the OOP52-CPP CERT rule: Do not delete a polymorphic
// object without a virtual destructor.
//
// Diagnostic flags -Wnon-virtual-dtor and -Wdelete-non-virtual-dtor report if
// an object with a virtual function but a non-virtual destructor exists or is
// deleted, respectively.
//
// This check exceeds them by comparing the dynamic and static types of the
// object at the point of destruction and only warns if it happens through a
// pointer to a base type without a virtual destructor. The check places a note
// at the last point where the conversion from derived to base happened.
//
//===----------------------------------------------------------------------===//

#include "clang/StaticAnalyzer/Checkers/BuiltinCheckerRegistration.h"
#include "clang/StaticAnalyzer/Core/BugReporter/BugReporter.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/CallEvent.h"
#include "clang/StaticAnalyzer/Core/PathSensitive/CheckerContext.h"
#include "clang/StaticAnalyzer/Core/PathSensitive/DynamicType.h"
#include "clang/StaticAnalyzer/Core/PathSensitive/ProgramStateTrait.h"

using namespace clang;
using namespace ento;

namespace {
class DeleteWithNonVirtualDtorChecker
    : public Checker<check::PreStmt<CXXDeleteExpr>> {
  mutable std::unique_ptr<BugType> BT;

class DeleteBugVisitor : public BugReporterVisitor {
  public:
    DeleteBugVisitor() : Satisfied(false) {}
    void Profile(llvm::FoldingSetNodeID &ID) const override {
      static int X = 0;
      ID.AddPointer(&X);
    }
    PathDiagnosticPieceRef VisitNode(const ExplodedNode *N,
                                     BugReporterContext &BRC,
                                     PathSensitiveBugReport &BR) override;

private:
    bool Satisfied;
  };

public:
  void checkPreStmt(const CXXDeleteExpr *DE, CheckerContext &C) const;
};
} // end anonymous namespace

void DeleteWithNonVirtualDtorChecker::checkPreStmt(const CXXDeleteExpr *DE,
                                                   CheckerContext &C) const {
  const Expr *DeletedObj = DE->getArgument();
  const MemRegion *MR = C.getSVal(DeletedObj).getAsRegion();
  if (!MR)
    return;

const auto *BaseClassRegion = MR->getAs<TypedValueRegion>();
  const auto *DerivedClassRegion = MR->getBaseRegion()->getAs<SymbolicRegion>();
  if (!BaseClassRegion || !DerivedClassRegion)
    return;

const auto *BaseClass = BaseClassRegion->getValueType()->getAsCXXRecordDecl();
  const auto *DerivedClass =
      DerivedClassRegion->getSymbol()->getType()->getPointeeCXXRecordDecl();
  if (!BaseClass || !DerivedClass)
    return;

if (!BaseClass->hasDefinition() || !DerivedClass->hasDefinition())
    return;

if (BaseClass->getDestructor()->isVirtual())
    return;

if (!DerivedClass->isDerivedFrom(BaseClass))
    return;

if (!BT)
    BT.reset(new BugType(this,
                         "Destruction of a polymorphic object with no "
                         "virtual destructor",
                         "Logic error"));

ExplodedNode *N = C.generateNonFatalErrorNode();
  if (!N)
    return;
  auto R = std::make_unique<PathSensitiveBugReport>(*BT, BT->getDescription(), N);

// Mark region of problematic base class for later use in the BugVisitor.
  R->markInteresting(BaseClassRegion);
  R->addVisitor(std::make_unique<DeleteBugVisitor>());
  C.emitReport(std::move(R));
}

PathDiagnosticPieceRef
DeleteWithNonVirtualDtorChecker::DeleteBugVisitor::VisitNode(
    const ExplodedNode *N, BugReporterContext &BRC,
    PathSensitiveBugReport &BR) {
  // Stop traversal after the first conversion was found on a path.
  if (Satisfied)
    return nullptr;

const Stmt *S = N->getStmtForDiagnostics();
  if (!S)
    return nullptr;

const auto *CastE = dyn_cast<CastExpr>(S);
  if (!CastE)
    return nullptr;

// Only interested in DerivedToBase implicit casts.
  // Explicit casts can have different CastKinds.
  if (const auto *ImplCastE = dyn_cast<ImplicitCastExpr>(CastE)) {
    if (ImplCastE->getCastKind() != CK_DerivedToBase)
      return nullptr;
  }

// Region associated with the current cast expression.
  const MemRegion *M = N->getSVal(CastE).getAsRegion();
  if (!M)
    return nullptr;

// Check if target region was marked as problematic previously.
  if (!BR.isInteresting(M))
    return nullptr;

// Stop traversal on this path.
  Satisfied = true;

SmallString<256> Buf;
  llvm::raw_svector_ostream OS(Buf);
  OS << "Conversion from derived to base happened here";
  PathDiagnosticLocation Pos(S, BRC.getSourceManager(),
                             N->getLocationContext());
  return std::make_shared<PathDiagnosticEventPiece>(Pos, OS.str(), true);
}

void ento::registerDeleteWithNonVirtualDtorChecker(CheckerManager &mgr) {
  mgr.registerChecker<DeleteWithNonVirtualDtorChecker>();
}

bool ento::shouldRegisterDeleteWithNonVirtualDtorChecker(
                                                    const CheckerManager &mgr) {
  return true;
}

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Editing: DeleteWithNonVirtualDtorChecker.cpp

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