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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: ObjCContainersChecker.cpp

//== ObjCContainersChecker.cpp - Path sensitive checker for CFArray *- 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
//
//===----------------------------------------------------------------------===//
//
// Performs path sensitive checks of Core Foundation static containers like
// CFArray.
// 1) Check for buffer overflows:
//      In CFArrayGetArrayAtIndex( myArray, index), if the index is outside the
//      index space of theArray (0 to N-1 inclusive (where N is the count of
//      theArray), the behavior is undefined.
//
//===----------------------------------------------------------------------===//

#include "clang/StaticAnalyzer/Checkers/BuiltinCheckerRegistration.h"
#include "clang/AST/ParentMap.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/ProgramStateTrait.h"

using namespace clang;
using namespace ento;

namespace {
class ObjCContainersChecker : public Checker< check::PreStmt<CallExpr>,
                                             check::PostStmt<CallExpr>,
                                             check::PointerEscape> {
  mutable std::unique_ptr<BugType> BT;
  inline void initBugType() const {
    if (!BT)
      BT.reset(new BugType(this, "CFArray API",
                           categories::CoreFoundationObjectiveC));
  }

inline SymbolRef getArraySym(const Expr *E, CheckerContext &C) const {
    SVal ArrayRef = C.getSVal(E);
    SymbolRef ArraySym = ArrayRef.getAsSymbol();
    return ArraySym;
  }

void addSizeInfo(const Expr *Array, const Expr *Size,
                   CheckerContext &C) const;

public:
  /// A tag to id this checker.
  static void *getTag() { static int Tag; return &Tag; }

void checkPostStmt(const CallExpr *CE, CheckerContext &C) const;
  void checkPreStmt(const CallExpr *CE, CheckerContext &C) const;
  ProgramStateRef checkPointerEscape(ProgramStateRef State,
                                     const InvalidatedSymbols &Escaped,
                                     const CallEvent *Call,
                                     PointerEscapeKind Kind) const;

void printState(raw_ostream &OS, ProgramStateRef State,
                  const char *NL, const char *Sep) const override;
};
} // end anonymous namespace

// ProgramState trait - a map from array symbol to its state.
REGISTER_MAP_WITH_PROGRAMSTATE(ArraySizeMap, SymbolRef, DefinedSVal)

void ObjCContainersChecker::addSizeInfo(const Expr *Array, const Expr *Size,
                                        CheckerContext &C) const {
  ProgramStateRef State = C.getState();
  SVal SizeV = C.getSVal(Size);
  // Undefined is reported by another checker.
  if (SizeV.isUnknownOrUndef())
    return;

// Get the ArrayRef symbol.
  SVal ArrayRef = C.getSVal(Array);
  SymbolRef ArraySym = ArrayRef.getAsSymbol();
  if (!ArraySym)
    return;

C.addTransition(
      State->set<ArraySizeMap>(ArraySym, SizeV.castAs<DefinedSVal>()));
}

void ObjCContainersChecker::checkPostStmt(const CallExpr *CE,
                                          CheckerContext &C) const {
  StringRef Name = C.getCalleeName(CE);
  if (Name.empty() || CE->getNumArgs() < 1)
    return;

// Add array size information to the state.
  if (Name.equals("CFArrayCreate")) {
    if (CE->getNumArgs() < 3)
      return;
    // Note, we can visit the Create method in the post-visit because
    // the CFIndex parameter is passed in by value and will not be invalidated
    // by the call.
    addSizeInfo(CE, CE->getArg(2), C);
    return;
  }

if (Name.equals("CFArrayGetCount")) {
    addSizeInfo(CE->getArg(0), CE, C);
    return;
  }
}

void ObjCContainersChecker::checkPreStmt(const CallExpr *CE,
                                         CheckerContext &C) const {
  StringRef Name = C.getCalleeName(CE);
  if (Name.empty() || CE->getNumArgs() < 2)
    return;

// Check the array access.
  if (Name.equals("CFArrayGetValueAtIndex")) {
    ProgramStateRef State = C.getState();
    // Retrieve the size.
    // Find out if we saw this array symbol before and have information about
    // it.
    const Expr *ArrayExpr = CE->getArg(0);
    SymbolRef ArraySym = getArraySym(ArrayExpr, C);
    if (!ArraySym)
      return;

const DefinedSVal *Size = State->get<ArraySizeMap>(ArraySym);

if (!Size)
      return;

// Get the index.
    const Expr *IdxExpr = CE->getArg(1);
    SVal IdxVal = C.getSVal(IdxExpr);
    if (IdxVal.isUnknownOrUndef())
      return;
    DefinedSVal Idx = IdxVal.castAs<DefinedSVal>();

// Now, check if 'Idx in [0, Size-1]'.
    const QualType T = IdxExpr->getType();
    ProgramStateRef StInBound = State->assumeInBound(Idx, *Size, true, T);
    ProgramStateRef StOutBound = State->assumeInBound(Idx, *Size, false, T);
    if (StOutBound && !StInBound) {
      ExplodedNode *N = C.generateErrorNode(StOutBound);
      if (!N)
        return;
      initBugType();
      auto R = std::make_unique<PathSensitiveBugReport>(
          *BT, "Index is out of bounds", N);
      R->addRange(IdxExpr->getSourceRange());
      bugreporter::trackExpressionValue(
          N, IdxExpr, *R, bugreporter::TrackingKind::Thorough, false);
      C.emitReport(std::move(R));
      return;
    }
  }
}

ProgramStateRef
ObjCContainersChecker::checkPointerEscape(ProgramStateRef State,
                                          const InvalidatedSymbols &Escaped,
                                          const CallEvent *Call,
                                          PointerEscapeKind Kind) const {
  for (const auto &Sym : Escaped) {
    // When a symbol for a mutable array escapes, we can't reason precisely
    // about its size any more -- so remove it from the map.
    // Note that we aren't notified here when a CFMutableArrayRef escapes as a
    // CFArrayRef. This is because CFArrayRef is typedef'd as a pointer to a
    // const-qualified type.
    State = State->remove<ArraySizeMap>(Sym);
  }
  return State;
}

void ObjCContainersChecker::printState(raw_ostream &OS, ProgramStateRef State,
                                       const char *NL, const char *Sep) const {
  ArraySizeMapTy Map = State->get<ArraySizeMap>();
  if (Map.isEmpty())
    return;

OS << Sep << "ObjC container sizes :" << NL;
  for (auto I : Map) {
    OS << I.first << " : " << I.second << NL;
  }
}

/// Register checker.
void ento::registerObjCContainersChecker(CheckerManager &mgr) {
  mgr.registerChecker<ObjCContainersChecker>();
}

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

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Editing: ObjCContainersChecker.cpp

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