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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: CheckObjCInstMethSignature.cpp

//===-- CheckObjCInstMethSignature.cpp - Check ObjC method signatures -----===//
//
// 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 file defines a CheckObjCInstMethSignature, a flow-insenstive check
//  that determines if an Objective-C class interface incorrectly redefines
//  the method signature in a subclass.
//
//===----------------------------------------------------------------------===//

#include "clang/StaticAnalyzer/Checkers/BuiltinCheckerRegistration.h"
#include "clang/Analysis/PathDiagnostic.h"
#include "clang/AST/ASTContext.h"
#include "clang/AST/DeclObjC.h"
#include "clang/AST/Type.h"
#include "clang/StaticAnalyzer/Core/BugReporter/BugReporter.h"
#include "clang/StaticAnalyzer/Core/Checker.h"
#include "llvm/ADT/DenseMap.h"
#include "llvm/Support/raw_ostream.h"

using namespace clang;
using namespace ento;

static bool AreTypesCompatible(QualType Derived, QualType Ancestor,
                               ASTContext &C) {

// Right now don't compare the compatibility of pointers.  That involves
  // looking at subtyping relationships.  FIXME: Future patch.
  if (Derived->isAnyPointerType() &&  Ancestor->isAnyPointerType())
    return true;

return C.typesAreCompatible(Derived, Ancestor);
}

static void CompareReturnTypes(const ObjCMethodDecl *MethDerived,
                               const ObjCMethodDecl *MethAncestor,
                               BugReporter &BR, ASTContext &Ctx,
                               const ObjCImplementationDecl *ID,
                               const CheckerBase *Checker) {

QualType ResDerived = MethDerived->getReturnType();
  QualType ResAncestor = MethAncestor->getReturnType();

if (!AreTypesCompatible(ResDerived, ResAncestor, Ctx)) {
    std::string sbuf;
    llvm::raw_string_ostream os(sbuf);

os << "The Objective-C class '"
       << *MethDerived->getClassInterface()
       << "', which is derived from class '"
       << *MethAncestor->getClassInterface()
       << "', defines the instance method '";
    MethDerived->getSelector().print(os);
    os << "' whose return type is '"
       << ResDerived.getAsString()
       << "'.  A method with the same name (same selector) is also defined in "
          "class '"
       << *MethAncestor->getClassInterface()
       << "' and has a return type of '"
       << ResAncestor.getAsString()
       << "'.  These two types are incompatible, and may result in undefined "
          "behavior for clients of these classes.";

PathDiagnosticLocation MethDLoc =
      PathDiagnosticLocation::createBegin(MethDerived,
                                          BR.getSourceManager());

BR.EmitBasicReport(
        MethDerived, Checker, "Incompatible instance method return type",
        categories::CoreFoundationObjectiveC, os.str(), MethDLoc);
  }
}

static void CheckObjCInstMethSignature(const ObjCImplementationDecl *ID,
                                       BugReporter &BR,
                                       const CheckerBase *Checker) {

const ObjCInterfaceDecl *D = ID->getClassInterface();
  const ObjCInterfaceDecl *C = D->getSuperClass();

if (!C)
    return;

ASTContext &Ctx = BR.getContext();

// Build a DenseMap of the methods for quick querying.
  typedef llvm::DenseMap<Selector,ObjCMethodDecl*> MapTy;
  MapTy IMeths;
  unsigned NumMethods = 0;

for (auto *M : ID->instance_methods()) {
    IMeths[M->getSelector()] = M;
    ++NumMethods;
  }

// Now recurse the class hierarchy chain looking for methods with the
  // same signatures.
  while (C && NumMethods) {
    for (const auto *M : C->instance_methods()) {
      Selector S = M->getSelector();

MapTy::iterator MI = IMeths.find(S);

if (MI == IMeths.end() || MI->second == nullptr)
        continue;

--NumMethods;
      ObjCMethodDecl *MethDerived = MI->second;
      MI->second = nullptr;

CompareReturnTypes(MethDerived, M, BR, Ctx, ID, Checker);
    }

C = C->getSuperClass();
  }
}

//===----------------------------------------------------------------------===//
// ObjCMethSigsChecker
//===----------------------------------------------------------------------===//

namespace {
class ObjCMethSigsChecker : public Checker<
                                      check::ASTDecl<ObjCImplementationDecl> > {
public:
  void checkASTDecl(const ObjCImplementationDecl *D, AnalysisManager& mgr,
                    BugReporter &BR) const {
    CheckObjCInstMethSignature(D, BR, this);
  }
};
}

void ento::registerObjCMethSigsChecker(CheckerManager &mgr) {
  mgr.registerChecker<ObjCMethSigsChecker>();
}

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

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Editing: CheckObjCInstMethSignature.cpp

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