| //== RegionStore.cpp - Field-sensitive store model --------------*- C++ -*--==// |
| // |
| // The LLVM Compiler Infrastructure |
| // |
| // This file is distributed under the University of Illinois Open Source |
| // License. See LICENSE.TXT for details. |
| // |
| //===----------------------------------------------------------------------===// |
| // |
| // This file defines a basic region store model. In this model, we do have field |
| // sensitivity. But we assume nothing about the heap shape. So recursive data |
| // structures are largely ignored. Basically we do 1-limiting analysis. |
| // Parameter pointers are assumed with no aliasing. Pointee objects of |
| // parameters are created lazily. |
| // |
| //===----------------------------------------------------------------------===// |
| #include "clang/AST/CharUnits.h" |
| #include "clang/AST/DeclCXX.h" |
| #include "clang/AST/ExprCXX.h" |
| #include "clang/Analysis/Analyses/LiveVariables.h" |
| #include "clang/Analysis/AnalysisContext.h" |
| #include "clang/Basic/TargetInfo.h" |
| #include "clang/StaticAnalyzer/Core/PathSensitive/ProgramState.h" |
| #include "clang/StaticAnalyzer/Core/PathSensitive/ProgramStateTrait.h" |
| #include "clang/StaticAnalyzer/Core/PathSensitive/MemRegion.h" |
| #include "llvm/ADT/ImmutableList.h" |
| #include "llvm/ADT/ImmutableMap.h" |
| #include "llvm/ADT/Optional.h" |
| #include "llvm/Support/raw_ostream.h" |
| |
| using namespace clang; |
| using namespace ento; |
| using llvm::Optional; |
| |
| //===----------------------------------------------------------------------===// |
| // Representation of binding keys. |
| //===----------------------------------------------------------------------===// |
| |
| namespace { |
| class BindingKey { |
| public: |
| enum Kind { Direct = 0x0, Default = 0x1 }; |
| private: |
| llvm ::PointerIntPair<const MemRegion*, 1> P; |
| uint64_t Offset; |
| |
| explicit BindingKey(const MemRegion *r, uint64_t offset, Kind k) |
| : P(r, (unsigned) k), Offset(offset) {} |
| public: |
| |
| bool isDirect() const { return P.getInt() == Direct; } |
| |
| const MemRegion *getRegion() const { return P.getPointer(); } |
| uint64_t getOffset() const { return Offset; } |
| |
| void Profile(llvm::FoldingSetNodeID& ID) const { |
| ID.AddPointer(P.getOpaqueValue()); |
| ID.AddInteger(Offset); |
| } |
| |
| static BindingKey Make(const MemRegion *R, Kind k); |
| |
| bool operator<(const BindingKey &X) const { |
| if (P.getOpaqueValue() < X.P.getOpaqueValue()) |
| return true; |
| if (P.getOpaqueValue() > X.P.getOpaqueValue()) |
| return false; |
| return Offset < X.Offset; |
| } |
| |
| bool operator==(const BindingKey &X) const { |
| return P.getOpaqueValue() == X.P.getOpaqueValue() && |
| Offset == X.Offset; |
| } |
| |
| bool isValid() const { |
| return getRegion() != NULL; |
| } |
| }; |
| } // end anonymous namespace |
| |
| BindingKey BindingKey::Make(const MemRegion *R, Kind k) { |
| if (const ElementRegion *ER = dyn_cast<ElementRegion>(R)) { |
| const RegionRawOffset &O = ER->getAsArrayOffset(); |
| |
| // FIXME: There are some ElementRegions for which we cannot compute |
| // raw offsets yet, including regions with symbolic offsets. These will be |
| // ignored by the store. |
| return BindingKey(O.getRegion(), O.getOffset().getQuantity(), k); |
| } |
| |
| return BindingKey(R, 0, k); |
| } |
| |
| namespace llvm { |
| static inline |
| raw_ostream &operator<<(raw_ostream &os, BindingKey K) { |
| os << '(' << K.getRegion() << ',' << K.getOffset() |
| << ',' << (K.isDirect() ? "direct" : "default") |
| << ')'; |
| return os; |
| } |
| } // end llvm namespace |
| |
| //===----------------------------------------------------------------------===// |
| // Actual Store type. |
| //===----------------------------------------------------------------------===// |
| |
| typedef llvm::ImmutableMap<BindingKey, SVal> RegionBindings; |
| |
| //===----------------------------------------------------------------------===// |
| // Fine-grained control of RegionStoreManager. |
| //===----------------------------------------------------------------------===// |
| |
| namespace { |
| struct minimal_features_tag {}; |
| struct maximal_features_tag {}; |
| |
| class RegionStoreFeatures { |
| bool SupportsFields; |
| public: |
| RegionStoreFeatures(minimal_features_tag) : |
| SupportsFields(false) {} |
| |
| RegionStoreFeatures(maximal_features_tag) : |
| SupportsFields(true) {} |
| |
| void enableFields(bool t) { SupportsFields = t; } |
| |
| bool supportsFields() const { return SupportsFields; } |
| }; |
| } |
| |
| //===----------------------------------------------------------------------===// |
| // Main RegionStore logic. |
| //===----------------------------------------------------------------------===// |
| |
| namespace { |
| |
| class RegionStoreSubRegionMap : public SubRegionMap { |
| public: |
| typedef llvm::ImmutableSet<const MemRegion*> Set; |
| typedef llvm::DenseMap<const MemRegion*, Set> Map; |
| private: |
| Set::Factory F; |
| Map M; |
| public: |
| bool add(const MemRegion* Parent, const MemRegion* SubRegion) { |
| Map::iterator I = M.find(Parent); |
| |
| if (I == M.end()) { |
| M.insert(std::make_pair(Parent, F.add(F.getEmptySet(), SubRegion))); |
| return true; |
| } |
| |
| I->second = F.add(I->second, SubRegion); |
| return false; |
| } |
| |
| void process(SmallVectorImpl<const SubRegion*> &WL, const SubRegion *R); |
| |
| ~RegionStoreSubRegionMap() {} |
| |
| const Set *getSubRegions(const MemRegion *Parent) const { |
| Map::const_iterator I = M.find(Parent); |
| return I == M.end() ? NULL : &I->second; |
| } |
| |
| bool iterSubRegions(const MemRegion* Parent, Visitor& V) const { |
| Map::const_iterator I = M.find(Parent); |
| |
| if (I == M.end()) |
| return true; |
| |
| Set S = I->second; |
| for (Set::iterator SI=S.begin(),SE=S.end(); SI != SE; ++SI) { |
| if (!V.Visit(Parent, *SI)) |
| return false; |
| } |
| |
| return true; |
| } |
| }; |
| |
| void |
| RegionStoreSubRegionMap::process(SmallVectorImpl<const SubRegion*> &WL, |
| const SubRegion *R) { |
| const MemRegion *superR = R->getSuperRegion(); |
| if (add(superR, R)) |
| if (const SubRegion *sr = dyn_cast<SubRegion>(superR)) |
| WL.push_back(sr); |
| } |
| |
| class RegionStoreManager : public StoreManager { |
| const RegionStoreFeatures Features; |
| RegionBindings::Factory RBFactory; |
| |
| public: |
| RegionStoreManager(ProgramStateManager& mgr, const RegionStoreFeatures &f) |
| : StoreManager(mgr), |
| Features(f), |
| RBFactory(mgr.getAllocator()) {} |
| |
| SubRegionMap *getSubRegionMap(Store store) { |
| return getRegionStoreSubRegionMap(store); |
| } |
| |
| RegionStoreSubRegionMap *getRegionStoreSubRegionMap(Store store); |
| |
| Optional<SVal> getDirectBinding(RegionBindings B, const MemRegion *R); |
| /// getDefaultBinding - Returns an SVal* representing an optional default |
| /// binding associated with a region and its subregions. |
| Optional<SVal> getDefaultBinding(RegionBindings B, const MemRegion *R); |
| |
| /// setImplicitDefaultValue - Set the default binding for the provided |
| /// MemRegion to the value implicitly defined for compound literals when |
| /// the value is not specified. |
| StoreRef setImplicitDefaultValue(Store store, const MemRegion *R, QualType T); |
| |
| /// ArrayToPointer - Emulates the "decay" of an array to a pointer |
| /// type. 'Array' represents the lvalue of the array being decayed |
| /// to a pointer, and the returned SVal represents the decayed |
| /// version of that lvalue (i.e., a pointer to the first element of |
| /// the array). This is called by ExprEngine when evaluating |
| /// casts from arrays to pointers. |
| SVal ArrayToPointer(Loc Array); |
| |
| /// For DerivedToBase casts, create a CXXBaseObjectRegion and return it. |
| virtual SVal evalDerivedToBase(SVal derived, QualType basePtrType); |
| |
| StoreRef getInitialStore(const LocationContext *InitLoc) { |
| return StoreRef(RBFactory.getEmptyMap().getRootWithoutRetain(), *this); |
| } |
| |
| //===-------------------------------------------------------------------===// |
| // Binding values to regions. |
| //===-------------------------------------------------------------------===// |
| |
| StoreRef invalidateRegions(Store store, |
| const MemRegion * const *Begin, |
| const MemRegion * const *End, |
| const Expr *E, unsigned Count, |
| InvalidatedSymbols &IS, |
| bool invalidateGlobals, |
| InvalidatedRegions *Regions); |
| |
| public: // Made public for helper classes. |
| |
| void RemoveSubRegionBindings(RegionBindings &B, const MemRegion *R, |
| RegionStoreSubRegionMap &M); |
| |
| RegionBindings addBinding(RegionBindings B, BindingKey K, SVal V); |
| |
| RegionBindings addBinding(RegionBindings B, const MemRegion *R, |
| BindingKey::Kind k, SVal V); |
| |
| const SVal *lookup(RegionBindings B, BindingKey K); |
| const SVal *lookup(RegionBindings B, const MemRegion *R, BindingKey::Kind k); |
| |
| RegionBindings removeBinding(RegionBindings B, BindingKey K); |
| RegionBindings removeBinding(RegionBindings B, const MemRegion *R, |
| BindingKey::Kind k); |
| |
| RegionBindings removeBinding(RegionBindings B, const MemRegion *R) { |
| return removeBinding(removeBinding(B, R, BindingKey::Direct), R, |
| BindingKey::Default); |
| } |
| |
| public: // Part of public interface to class. |
| |
| StoreRef Bind(Store store, Loc LV, SVal V); |
| |
| // BindDefault is only used to initialize a region with a default value. |
| StoreRef BindDefault(Store store, const MemRegion *R, SVal V) { |
| RegionBindings B = GetRegionBindings(store); |
| assert(!lookup(B, R, BindingKey::Default)); |
| assert(!lookup(B, R, BindingKey::Direct)); |
| return StoreRef(addBinding(B, R, BindingKey::Default, V).getRootWithoutRetain(), *this); |
| } |
| |
| StoreRef BindCompoundLiteral(Store store, const CompoundLiteralExpr *CL, |
| const LocationContext *LC, SVal V); |
| |
| StoreRef BindDecl(Store store, const VarRegion *VR, SVal InitVal); |
| |
| StoreRef BindDeclWithNoInit(Store store, const VarRegion *) { |
| return StoreRef(store, *this); |
| } |
| |
| /// BindStruct - Bind a compound value to a structure. |
| StoreRef BindStruct(Store store, const TypedValueRegion* R, SVal V); |
| |
| StoreRef BindArray(Store store, const TypedValueRegion* R, SVal V); |
| |
| /// KillStruct - Set the entire struct to unknown. |
| StoreRef KillStruct(Store store, const TypedRegion* R, SVal DefaultVal); |
| |
| StoreRef Remove(Store store, Loc LV); |
| |
| void incrementReferenceCount(Store store) { |
| GetRegionBindings(store).manualRetain(); |
| } |
| |
| /// If the StoreManager supports it, decrement the reference count of |
| /// the specified Store object. If the reference count hits 0, the memory |
| /// associated with the object is recycled. |
| void decrementReferenceCount(Store store) { |
| GetRegionBindings(store).manualRelease(); |
| } |
| |
| bool includedInBindings(Store store, const MemRegion *region) const; |
| |
| //===------------------------------------------------------------------===// |
| // Loading values from regions. |
| //===------------------------------------------------------------------===// |
| |
| /// The high level logic for this method is this: |
| /// Retrieve (L) |
| /// if L has binding |
| /// return L's binding |
| /// else if L is in killset |
| /// return unknown |
| /// else |
| /// if L is on stack or heap |
| /// return undefined |
| /// else |
| /// return symbolic |
| SVal Retrieve(Store store, Loc L, QualType T = QualType()); |
| |
| SVal RetrieveElement(Store store, const ElementRegion *R); |
| |
| SVal RetrieveField(Store store, const FieldRegion *R); |
| |
| SVal RetrieveObjCIvar(Store store, const ObjCIvarRegion *R); |
| |
| SVal RetrieveVar(Store store, const VarRegion *R); |
| |
| SVal RetrieveLazySymbol(const TypedValueRegion *R); |
| |
| SVal RetrieveFieldOrElementCommon(Store store, const TypedValueRegion *R, |
| QualType Ty, const MemRegion *superR); |
| |
| SVal RetrieveLazyBinding(const MemRegion *lazyBindingRegion, |
| Store lazyBindingStore); |
| |
| /// Retrieve the values in a struct and return a CompoundVal, used when doing |
| /// struct copy: |
| /// struct s x, y; |
| /// x = y; |
| /// y's value is retrieved by this method. |
| SVal RetrieveStruct(Store store, const TypedValueRegion* R); |
| |
| SVal RetrieveArray(Store store, const TypedValueRegion* R); |
| |
| /// Used to lazily generate derived symbols for bindings that are defined |
| /// implicitly by default bindings in a super region. |
| Optional<SVal> RetrieveDerivedDefaultValue(RegionBindings B, |
| const MemRegion *superR, |
| const TypedValueRegion *R, |
| QualType Ty); |
| |
| /// Get the state and region whose binding this region R corresponds to. |
| std::pair<Store, const MemRegion*> |
| GetLazyBinding(RegionBindings B, const MemRegion *R, |
| const MemRegion *originalRegion); |
| |
| StoreRef CopyLazyBindings(nonloc::LazyCompoundVal V, Store store, |
| const TypedRegion *R); |
| |
| //===------------------------------------------------------------------===// |
| // State pruning. |
| //===------------------------------------------------------------------===// |
| |
| /// removeDeadBindings - Scans the RegionStore of 'state' for dead values. |
| /// It returns a new Store with these values removed. |
| StoreRef removeDeadBindings(Store store, const StackFrameContext *LCtx, |
| SymbolReaper& SymReaper); |
| |
| StoreRef enterStackFrame(const ProgramState *state, |
| const StackFrameContext *frame); |
| |
| //===------------------------------------------------------------------===// |
| // Region "extents". |
| //===------------------------------------------------------------------===// |
| |
| // FIXME: This method will soon be eliminated; see the note in Store.h. |
| DefinedOrUnknownSVal getSizeInElements(const ProgramState *state, |
| const MemRegion* R, QualType EleTy); |
| |
| //===------------------------------------------------------------------===// |
| // Utility methods. |
| //===------------------------------------------------------------------===// |
| |
| static inline RegionBindings GetRegionBindings(Store store) { |
| return RegionBindings(static_cast<const RegionBindings::TreeTy*>(store)); |
| } |
| |
| void print(Store store, raw_ostream &Out, const char* nl, |
| const char *sep); |
| |
| void iterBindings(Store store, BindingsHandler& f) { |
| RegionBindings B = GetRegionBindings(store); |
| for (RegionBindings::iterator I=B.begin(), E=B.end(); I!=E; ++I) { |
| const BindingKey &K = I.getKey(); |
| if (!K.isDirect()) |
| continue; |
| if (const SubRegion *R = dyn_cast<SubRegion>(I.getKey().getRegion())) { |
| // FIXME: Possibly incorporate the offset? |
| if (!f.HandleBinding(*this, store, R, I.getData())) |
| return; |
| } |
| } |
| } |
| }; |
| |
| } // end anonymous namespace |
| |
| //===----------------------------------------------------------------------===// |
| // RegionStore creation. |
| //===----------------------------------------------------------------------===// |
| |
| StoreManager *ento::CreateRegionStoreManager(ProgramStateManager& StMgr) { |
| RegionStoreFeatures F = maximal_features_tag(); |
| return new RegionStoreManager(StMgr, F); |
| } |
| |
| StoreManager *ento::CreateFieldsOnlyRegionStoreManager(ProgramStateManager &StMgr) { |
| RegionStoreFeatures F = minimal_features_tag(); |
| F.enableFields(true); |
| return new RegionStoreManager(StMgr, F); |
| } |
| |
| |
| RegionStoreSubRegionMap* |
| RegionStoreManager::getRegionStoreSubRegionMap(Store store) { |
| RegionBindings B = GetRegionBindings(store); |
| RegionStoreSubRegionMap *M = new RegionStoreSubRegionMap(); |
| |
| SmallVector<const SubRegion*, 10> WL; |
| |
| for (RegionBindings::iterator I=B.begin(), E=B.end(); I!=E; ++I) |
| if (const SubRegion *R = dyn_cast<SubRegion>(I.getKey().getRegion())) |
| M->process(WL, R); |
| |
| // We also need to record in the subregion map "intermediate" regions that |
| // don't have direct bindings but are super regions of those that do. |
| while (!WL.empty()) { |
| const SubRegion *R = WL.back(); |
| WL.pop_back(); |
| M->process(WL, R); |
| } |
| |
| return M; |
| } |
| |
| //===----------------------------------------------------------------------===// |
| // Region Cluster analysis. |
| //===----------------------------------------------------------------------===// |
| |
| namespace { |
| template <typename DERIVED> |
| class ClusterAnalysis { |
| protected: |
| typedef BumpVector<BindingKey> RegionCluster; |
| typedef llvm::DenseMap<const MemRegion *, RegionCluster *> ClusterMap; |
| llvm::DenseMap<const RegionCluster*, unsigned> Visited; |
| typedef SmallVector<std::pair<const MemRegion *, RegionCluster*>, 10> |
| WorkList; |
| |
| BumpVectorContext BVC; |
| ClusterMap ClusterM; |
| WorkList WL; |
| |
| RegionStoreManager &RM; |
| ASTContext &Ctx; |
| SValBuilder &svalBuilder; |
| |
| RegionBindings B; |
| |
| const bool includeGlobals; |
| |
| public: |
| ClusterAnalysis(RegionStoreManager &rm, ProgramStateManager &StateMgr, |
| RegionBindings b, const bool includeGlobals) |
| : RM(rm), Ctx(StateMgr.getContext()), |
| svalBuilder(StateMgr.getSValBuilder()), |
| B(b), includeGlobals(includeGlobals) {} |
| |
| RegionBindings getRegionBindings() const { return B; } |
| |
| RegionCluster &AddToCluster(BindingKey K) { |
| const MemRegion *R = K.getRegion(); |
| const MemRegion *baseR = R->getBaseRegion(); |
| RegionCluster &C = getCluster(baseR); |
| C.push_back(K, BVC); |
| static_cast<DERIVED*>(this)->VisitAddedToCluster(baseR, C); |
| return C; |
| } |
| |
| bool isVisited(const MemRegion *R) { |
| return (bool) Visited[&getCluster(R->getBaseRegion())]; |
| } |
| |
| RegionCluster& getCluster(const MemRegion *R) { |
| RegionCluster *&CRef = ClusterM[R]; |
| if (!CRef) { |
| void *Mem = BVC.getAllocator().template Allocate<RegionCluster>(); |
| CRef = new (Mem) RegionCluster(BVC, 10); |
| } |
| return *CRef; |
| } |
| |
| void GenerateClusters() { |
| // Scan the entire set of bindings and make the region clusters. |
| for (RegionBindings::iterator RI = B.begin(), RE = B.end(); RI != RE; ++RI){ |
| RegionCluster &C = AddToCluster(RI.getKey()); |
| if (const MemRegion *R = RI.getData().getAsRegion()) { |
| // Generate a cluster, but don't add the region to the cluster |
| // if there aren't any bindings. |
| getCluster(R->getBaseRegion()); |
| } |
| if (includeGlobals) { |
| const MemRegion *R = RI.getKey().getRegion(); |
| if (isa<NonStaticGlobalSpaceRegion>(R->getMemorySpace())) |
| AddToWorkList(R, C); |
| } |
| } |
| } |
| |
| bool AddToWorkList(const MemRegion *R, RegionCluster &C) { |
| if (unsigned &visited = Visited[&C]) |
| return false; |
| else |
| visited = 1; |
| |
| WL.push_back(std::make_pair(R, &C)); |
| return true; |
| } |
| |
| bool AddToWorkList(BindingKey K) { |
| return AddToWorkList(K.getRegion()); |
| } |
| |
| bool AddToWorkList(const MemRegion *R) { |
| const MemRegion *baseR = R->getBaseRegion(); |
| return AddToWorkList(baseR, getCluster(baseR)); |
| } |
| |
| void RunWorkList() { |
| while (!WL.empty()) { |
| const MemRegion *baseR; |
| RegionCluster *C; |
| llvm::tie(baseR, C) = WL.back(); |
| WL.pop_back(); |
| |
| // First visit the cluster. |
| static_cast<DERIVED*>(this)->VisitCluster(baseR, C->begin(), C->end()); |
| |
| // Next, visit the base region. |
| static_cast<DERIVED*>(this)->VisitBaseRegion(baseR); |
| } |
| } |
| |
| public: |
| void VisitAddedToCluster(const MemRegion *baseR, RegionCluster &C) {} |
| void VisitCluster(const MemRegion *baseR, BindingKey *I, BindingKey *E) {} |
| void VisitBaseRegion(const MemRegion *baseR) {} |
| }; |
| } |
| |
| //===----------------------------------------------------------------------===// |
| // Binding invalidation. |
| //===----------------------------------------------------------------------===// |
| |
| void RegionStoreManager::RemoveSubRegionBindings(RegionBindings &B, |
| const MemRegion *R, |
| RegionStoreSubRegionMap &M) { |
| |
| if (const RegionStoreSubRegionMap::Set *S = M.getSubRegions(R)) |
| for (RegionStoreSubRegionMap::Set::iterator I = S->begin(), E = S->end(); |
| I != E; ++I) |
| RemoveSubRegionBindings(B, *I, M); |
| |
| B = removeBinding(B, R); |
| } |
| |
| namespace { |
| class invalidateRegionsWorker : public ClusterAnalysis<invalidateRegionsWorker> |
| { |
| const Expr *Ex; |
| unsigned Count; |
| StoreManager::InvalidatedSymbols &IS; |
| StoreManager::InvalidatedRegions *Regions; |
| public: |
| invalidateRegionsWorker(RegionStoreManager &rm, |
| ProgramStateManager &stateMgr, |
| RegionBindings b, |
| const Expr *ex, unsigned count, |
| StoreManager::InvalidatedSymbols &is, |
| StoreManager::InvalidatedRegions *r, |
| bool includeGlobals) |
| : ClusterAnalysis<invalidateRegionsWorker>(rm, stateMgr, b, includeGlobals), |
| Ex(ex), Count(count), IS(is), Regions(r) {} |
| |
| void VisitCluster(const MemRegion *baseR, BindingKey *I, BindingKey *E); |
| void VisitBaseRegion(const MemRegion *baseR); |
| |
| private: |
| void VisitBinding(SVal V); |
| }; |
| } |
| |
| void invalidateRegionsWorker::VisitBinding(SVal V) { |
| // A symbol? Mark it touched by the invalidation. |
| if (SymbolRef Sym = V.getAsSymbol()) |
| IS.insert(Sym); |
| |
| if (const MemRegion *R = V.getAsRegion()) { |
| AddToWorkList(R); |
| return; |
| } |
| |
| // Is it a LazyCompoundVal? All references get invalidated as well. |
| if (const nonloc::LazyCompoundVal *LCS = |
| dyn_cast<nonloc::LazyCompoundVal>(&V)) { |
| |
| const MemRegion *LazyR = LCS->getRegion(); |
| RegionBindings B = RegionStoreManager::GetRegionBindings(LCS->getStore()); |
| |
| for (RegionBindings::iterator RI = B.begin(), RE = B.end(); RI != RE; ++RI){ |
| const SubRegion *baseR = dyn_cast<SubRegion>(RI.getKey().getRegion()); |
| if (baseR && baseR->isSubRegionOf(LazyR)) |
| VisitBinding(RI.getData()); |
| } |
| |
| return; |
| } |
| } |
| |
| void invalidateRegionsWorker::VisitCluster(const MemRegion *baseR, |
| BindingKey *I, BindingKey *E) { |
| for ( ; I != E; ++I) { |
| // Get the old binding. Is it a region? If so, add it to the worklist. |
| const BindingKey &K = *I; |
| if (const SVal *V = RM.lookup(B, K)) |
| VisitBinding(*V); |
| |
| B = RM.removeBinding(B, K); |
| } |
| } |
| |
| void invalidateRegionsWorker::VisitBaseRegion(const MemRegion *baseR) { |
| // Symbolic region? Mark that symbol touched by the invalidation. |
| if (const SymbolicRegion *SR = dyn_cast<SymbolicRegion>(baseR)) |
| IS.insert(SR->getSymbol()); |
| |
| // BlockDataRegion? If so, invalidate captured variables that are passed |
| // by reference. |
| if (const BlockDataRegion *BR = dyn_cast<BlockDataRegion>(baseR)) { |
| for (BlockDataRegion::referenced_vars_iterator |
| BI = BR->referenced_vars_begin(), BE = BR->referenced_vars_end() ; |
| BI != BE; ++BI) { |
| const VarRegion *VR = *BI; |
| const VarDecl *VD = VR->getDecl(); |
| if (VD->getAttr<BlocksAttr>() || !VD->hasLocalStorage()) |
| AddToWorkList(VR); |
| } |
| return; |
| } |
| |
| // Otherwise, we have a normal data region. Record that we touched the region. |
| if (Regions) |
| Regions->push_back(baseR); |
| |
| if (isa<AllocaRegion>(baseR) || isa<SymbolicRegion>(baseR)) { |
| // Invalidate the region by setting its default value to |
| // conjured symbol. The type of the symbol is irrelavant. |
| DefinedOrUnknownSVal V = |
| svalBuilder.getConjuredSymbolVal(baseR, Ex, Ctx.IntTy, Count); |
| B = RM.addBinding(B, baseR, BindingKey::Default, V); |
| return; |
| } |
| |
| if (!baseR->isBoundable()) |
| return; |
| |
| const TypedValueRegion *TR = cast<TypedValueRegion>(baseR); |
| QualType T = TR->getValueType(); |
| |
| // Invalidate the binding. |
| if (T->isStructureOrClassType()) { |
| // Invalidate the region by setting its default value to |
| // conjured symbol. The type of the symbol is irrelavant. |
| DefinedOrUnknownSVal V = |
| svalBuilder.getConjuredSymbolVal(baseR, Ex, Ctx.IntTy, Count); |
| B = RM.addBinding(B, baseR, BindingKey::Default, V); |
| return; |
| } |
| |
| if (const ArrayType *AT = Ctx.getAsArrayType(T)) { |
| // Set the default value of the array to conjured symbol. |
| DefinedOrUnknownSVal V = |
| svalBuilder.getConjuredSymbolVal(baseR, Ex, AT->getElementType(), Count); |
| B = RM.addBinding(B, baseR, BindingKey::Default, V); |
| return; |
| } |
| |
| if (includeGlobals && |
| isa<NonStaticGlobalSpaceRegion>(baseR->getMemorySpace())) { |
| // If the region is a global and we are invalidating all globals, |
| // just erase the entry. This causes all globals to be lazily |
| // symbolicated from the same base symbol. |
| B = RM.removeBinding(B, baseR); |
| return; |
| } |
| |
| |
| DefinedOrUnknownSVal V = svalBuilder.getConjuredSymbolVal(baseR, Ex, T, Count); |
| assert(SymbolManager::canSymbolicate(T) || V.isUnknown()); |
| B = RM.addBinding(B, baseR, BindingKey::Direct, V); |
| } |
| |
| StoreRef RegionStoreManager::invalidateRegions(Store store, |
| const MemRegion * const *I, |
| const MemRegion * const *E, |
| const Expr *Ex, unsigned Count, |
| InvalidatedSymbols &IS, |
| bool invalidateGlobals, |
| InvalidatedRegions *Regions) { |
| invalidateRegionsWorker W(*this, StateMgr, |
| RegionStoreManager::GetRegionBindings(store), |
| Ex, Count, IS, Regions, invalidateGlobals); |
| |
| // Scan the bindings and generate the clusters. |
| W.GenerateClusters(); |
| |
| // Add I .. E to the worklist. |
| for ( ; I != E; ++I) |
| W.AddToWorkList(*I); |
| |
| W.RunWorkList(); |
| |
| // Return the new bindings. |
| RegionBindings B = W.getRegionBindings(); |
| |
| if (invalidateGlobals) { |
| // Bind the non-static globals memory space to a new symbol that we will |
| // use to derive the bindings for all non-static globals. |
| const GlobalsSpaceRegion *GS = MRMgr.getGlobalsRegion(); |
| SVal V = |
| svalBuilder.getConjuredSymbolVal(/* SymbolTag = */ (void*) GS, Ex, |
| /* symbol type, doesn't matter */ Ctx.IntTy, |
| Count); |
| B = addBinding(B, BindingKey::Make(GS, BindingKey::Default), V); |
| |
| // Even if there are no bindings in the global scope, we still need to |
| // record that we touched it. |
| if (Regions) |
| Regions->push_back(GS); |
| } |
| |
| return StoreRef(B.getRootWithoutRetain(), *this); |
| } |
| |
| //===----------------------------------------------------------------------===// |
| // Extents for regions. |
| //===----------------------------------------------------------------------===// |
| |
| DefinedOrUnknownSVal RegionStoreManager::getSizeInElements(const ProgramState *state, |
| const MemRegion *R, |
| QualType EleTy) { |
| SVal Size = cast<SubRegion>(R)->getExtent(svalBuilder); |
| const llvm::APSInt *SizeInt = svalBuilder.getKnownValue(state, Size); |
| if (!SizeInt) |
| return UnknownVal(); |
| |
| CharUnits RegionSize = CharUnits::fromQuantity(SizeInt->getSExtValue()); |
| |
| if (Ctx.getAsVariableArrayType(EleTy)) { |
| // FIXME: We need to track extra state to properly record the size |
| // of VLAs. Returning UnknownVal here, however, is a stop-gap so that |
| // we don't have a divide-by-zero below. |
| return UnknownVal(); |
| } |
| |
| CharUnits EleSize = Ctx.getTypeSizeInChars(EleTy); |
| |
| // If a variable is reinterpreted as a type that doesn't fit into a larger |
| // type evenly, round it down. |
| // This is a signed value, since it's used in arithmetic with signed indices. |
| return svalBuilder.makeIntVal(RegionSize / EleSize, false); |
| } |
| |
| //===----------------------------------------------------------------------===// |
| // Location and region casting. |
| //===----------------------------------------------------------------------===// |
| |
| /// ArrayToPointer - Emulates the "decay" of an array to a pointer |
| /// type. 'Array' represents the lvalue of the array being decayed |
| /// to a pointer, and the returned SVal represents the decayed |
| /// version of that lvalue (i.e., a pointer to the first element of |
| /// the array). This is called by ExprEngine when evaluating casts |
| /// from arrays to pointers. |
| SVal RegionStoreManager::ArrayToPointer(Loc Array) { |
| if (!isa<loc::MemRegionVal>(Array)) |
| return UnknownVal(); |
| |
| const MemRegion* R = cast<loc::MemRegionVal>(&Array)->getRegion(); |
| const TypedValueRegion* ArrayR = dyn_cast<TypedValueRegion>(R); |
| |
| if (!ArrayR) |
| return UnknownVal(); |
| |
| // Strip off typedefs from the ArrayRegion's ValueType. |
| QualType T = ArrayR->getValueType().getDesugaredType(Ctx); |
| const ArrayType *AT = cast<ArrayType>(T); |
| T = AT->getElementType(); |
| |
| NonLoc ZeroIdx = svalBuilder.makeZeroArrayIndex(); |
| return loc::MemRegionVal(MRMgr.getElementRegion(T, ZeroIdx, ArrayR, Ctx)); |
| } |
| |
| SVal RegionStoreManager::evalDerivedToBase(SVal derived, QualType baseType) { |
| const CXXRecordDecl *baseDecl; |
| if (baseType->isPointerType()) |
| baseDecl = baseType->getCXXRecordDeclForPointerType(); |
| else |
| baseDecl = baseType->getAsCXXRecordDecl(); |
| |
| assert(baseDecl && "not a CXXRecordDecl?"); |
| |
| loc::MemRegionVal *derivedRegVal = dyn_cast<loc::MemRegionVal>(&derived); |
| if (!derivedRegVal) |
| return derived; |
| |
| const MemRegion *baseReg = |
| MRMgr.getCXXBaseObjectRegion(baseDecl, derivedRegVal->getRegion()); |
| |
| return loc::MemRegionVal(baseReg); |
| } |
| |
| //===----------------------------------------------------------------------===// |
| // Loading values from regions. |
| //===----------------------------------------------------------------------===// |
| |
| Optional<SVal> RegionStoreManager::getDirectBinding(RegionBindings B, |
| const MemRegion *R) { |
| |
| if (const SVal *V = lookup(B, R, BindingKey::Direct)) |
| return *V; |
| |
| return Optional<SVal>(); |
| } |
| |
| Optional<SVal> RegionStoreManager::getDefaultBinding(RegionBindings B, |
| const MemRegion *R) { |
| if (R->isBoundable()) |
| if (const TypedValueRegion *TR = dyn_cast<TypedValueRegion>(R)) |
| if (TR->getValueType()->isUnionType()) |
| return UnknownVal(); |
| |
| if (const SVal *V = lookup(B, R, BindingKey::Default)) |
| return *V; |
| |
| return Optional<SVal>(); |
| } |
| |
| SVal RegionStoreManager::Retrieve(Store store, Loc L, QualType T) { |
| assert(!isa<UnknownVal>(L) && "location unknown"); |
| assert(!isa<UndefinedVal>(L) && "location undefined"); |
| |
| // For access to concrete addresses, return UnknownVal. Checks |
| // for null dereferences (and similar errors) are done by checkers, not |
| // the Store. |
| // FIXME: We can consider lazily symbolicating such memory, but we really |
| // should defer this when we can reason easily about symbolicating arrays |
| // of bytes. |
| if (isa<loc::ConcreteInt>(L)) { |
| return UnknownVal(); |
| } |
| if (!isa<loc::MemRegionVal>(L)) { |
| return UnknownVal(); |
| } |
| |
| const MemRegion *MR = cast<loc::MemRegionVal>(L).getRegion(); |
| |
| if (isa<AllocaRegion>(MR) || isa<SymbolicRegion>(MR)) { |
| if (T.isNull()) { |
| const SymbolicRegion *SR = cast<SymbolicRegion>(MR); |
| T = SR->getSymbol()->getType(Ctx); |
| } |
| MR = GetElementZeroRegion(MR, T); |
| } |
| |
| if (isa<CodeTextRegion>(MR)) { |
| assert(0 && "Why load from a code text region?"); |
| return UnknownVal(); |
| } |
| |
| // FIXME: Perhaps this method should just take a 'const MemRegion*' argument |
| // instead of 'Loc', and have the other Loc cases handled at a higher level. |
| const TypedValueRegion *R = cast<TypedValueRegion>(MR); |
| QualType RTy = R->getValueType(); |
| |
| // FIXME: We should eventually handle funny addressing. e.g.: |
| // |
| // int x = ...; |
| // int *p = &x; |
| // char *q = (char*) p; |
| // char c = *q; // returns the first byte of 'x'. |
| // |
| // Such funny addressing will occur due to layering of regions. |
| |
| if (RTy->isStructureOrClassType()) |
| return RetrieveStruct(store, R); |
| |
| // FIXME: Handle unions. |
| if (RTy->isUnionType()) |
| return UnknownVal(); |
| |
| if (RTy->isArrayType()) |
| return RetrieveArray(store, R); |
| |
| // FIXME: handle Vector types. |
| if (RTy->isVectorType()) |
| return UnknownVal(); |
| |
| if (const FieldRegion* FR = dyn_cast<FieldRegion>(R)) |
| return CastRetrievedVal(RetrieveField(store, FR), FR, T, false); |
| |
| if (const ElementRegion* ER = dyn_cast<ElementRegion>(R)) { |
| // FIXME: Here we actually perform an implicit conversion from the loaded |
| // value to the element type. Eventually we want to compose these values |
| // more intelligently. For example, an 'element' can encompass multiple |
| // bound regions (e.g., several bound bytes), or could be a subset of |
| // a larger value. |
| return CastRetrievedVal(RetrieveElement(store, ER), ER, T, false); |
| } |
| |
| if (const ObjCIvarRegion *IVR = dyn_cast<ObjCIvarRegion>(R)) { |
| // FIXME: Here we actually perform an implicit conversion from the loaded |
| // value to the ivar type. What we should model is stores to ivars |
| // that blow past the extent of the ivar. If the address of the ivar is |
| // reinterpretted, it is possible we stored a different value that could |
| // fit within the ivar. Either we need to cast these when storing them |
| // or reinterpret them lazily (as we do here). |
| return CastRetrievedVal(RetrieveObjCIvar(store, IVR), IVR, T, false); |
| } |
| |
| if (const VarRegion *VR = dyn_cast<VarRegion>(R)) { |
| // FIXME: Here we actually perform an implicit conversion from the loaded |
| // value to the variable type. What we should model is stores to variables |
| // that blow past the extent of the variable. If the address of the |
| // variable is reinterpretted, it is possible we stored a different value |
| // that could fit within the variable. Either we need to cast these when |
| // storing them or reinterpret them lazily (as we do here). |
| return CastRetrievedVal(RetrieveVar(store, VR), VR, T, false); |
| } |
| |
| RegionBindings B = GetRegionBindings(store); |
| const SVal *V = lookup(B, R, BindingKey::Direct); |
| |
| // Check if the region has a binding. |
| if (V) |
| return *V; |
| |
| // The location does not have a bound value. This means that it has |
| // the value it had upon its creation and/or entry to the analyzed |
| // function/method. These are either symbolic values or 'undefined'. |
| if (R->hasStackNonParametersStorage()) { |
| // All stack variables are considered to have undefined values |
| // upon creation. All heap allocated blocks are considered to |
| // have undefined values as well unless they are explicitly bound |
| // to specific values. |
| return UndefinedVal(); |
| } |
| |
| // All other values are symbolic. |
| return svalBuilder.getRegionValueSymbolVal(R); |
| } |
| |
| std::pair<Store, const MemRegion *> |
| RegionStoreManager::GetLazyBinding(RegionBindings B, const MemRegion *R, |
| const MemRegion *originalRegion) { |
| |
| if (originalRegion != R) { |
| if (Optional<SVal> OV = getDefaultBinding(B, R)) { |
| if (const nonloc::LazyCompoundVal *V = |
| dyn_cast<nonloc::LazyCompoundVal>(OV.getPointer())) |
| return std::make_pair(V->getStore(), V->getRegion()); |
| } |
| } |
| |
| if (const ElementRegion *ER = dyn_cast<ElementRegion>(R)) { |
| const std::pair<Store, const MemRegion *> &X = |
| GetLazyBinding(B, ER->getSuperRegion(), originalRegion); |
| |
| if (X.second) |
| return std::make_pair(X.first, |
| MRMgr.getElementRegionWithSuper(ER, X.second)); |
| } |
| else if (const FieldRegion *FR = dyn_cast<FieldRegion>(R)) { |
| const std::pair<Store, const MemRegion *> &X = |
| GetLazyBinding(B, FR->getSuperRegion(), originalRegion); |
| |
| if (X.second) |
| return std::make_pair(X.first, |
| MRMgr.getFieldRegionWithSuper(FR, X.second)); |
| } |
| // C++ base object region is another kind of region that we should blast |
| // through to look for lazy compound value. It is like a field region. |
| else if (const CXXBaseObjectRegion *baseReg = |
| dyn_cast<CXXBaseObjectRegion>(R)) { |
| const std::pair<Store, const MemRegion *> &X = |
| GetLazyBinding(B, baseReg->getSuperRegion(), originalRegion); |
| |
| if (X.second) |
| return std::make_pair(X.first, |
| MRMgr.getCXXBaseObjectRegionWithSuper(baseReg, X.second)); |
| } |
| |
| // The NULL MemRegion indicates an non-existent lazy binding. A NULL Store is |
| // possible for a valid lazy binding. |
| return std::make_pair((Store) 0, (const MemRegion *) 0); |
| } |
| |
| SVal RegionStoreManager::RetrieveElement(Store store, |
| const ElementRegion* R) { |
| // Check if the region has a binding. |
| RegionBindings B = GetRegionBindings(store); |
| if (const Optional<SVal> &V = getDirectBinding(B, R)) |
| return *V; |
| |
| const MemRegion* superR = R->getSuperRegion(); |
| |
| // Check if the region is an element region of a string literal. |
| if (const StringRegion *StrR=dyn_cast<StringRegion>(superR)) { |
| // FIXME: Handle loads from strings where the literal is treated as |
| // an integer, e.g., *((unsigned int*)"hello") |
| QualType T = Ctx.getAsArrayType(StrR->getValueType())->getElementType(); |
| if (T != Ctx.getCanonicalType(R->getElementType())) |
| return UnknownVal(); |
| |
| const StringLiteral *Str = StrR->getStringLiteral(); |
| SVal Idx = R->getIndex(); |
| if (nonloc::ConcreteInt *CI = dyn_cast<nonloc::ConcreteInt>(&Idx)) { |
| int64_t i = CI->getValue().getSExtValue(); |
| // Abort on string underrun. This can be possible by arbitrary |
| // clients of RetrieveElement(). |
| if (i < 0) |
| return UndefinedVal(); |
| int64_t byteLength = Str->getByteLength(); |
| // Technically, only i == byteLength is guaranteed to be null. |
| // However, such overflows should be caught before reaching this point; |
| // the only time such an access would be made is if a string literal was |
| // used to initialize a larger array. |
| char c = (i >= byteLength) ? '\0' : Str->getString()[i]; |
| return svalBuilder.makeIntVal(c, T); |
| } |
| } |
| |
| // Check for loads from a code text region. For such loads, just give up. |
| if (isa<CodeTextRegion>(superR)) |
| return UnknownVal(); |
| |
| // Handle the case where we are indexing into a larger scalar object. |
| // For example, this handles: |
| // int x = ... |
| // char *y = &x; |
| // return *y; |
| // FIXME: This is a hack, and doesn't do anything really intelligent yet. |
| const RegionRawOffset &O = R->getAsArrayOffset(); |
| |
| // If we cannot reason about the offset, return an unknown value. |
| if (!O.getRegion()) |
| return UnknownVal(); |
| |
| if (const TypedValueRegion *baseR = |
| dyn_cast_or_null<TypedValueRegion>(O.getRegion())) { |
| QualType baseT = baseR->getValueType(); |
| if (baseT->isScalarType()) { |
| QualType elemT = R->getElementType(); |
| if (elemT->isScalarType()) { |
| if (Ctx.getTypeSizeInChars(baseT) >= Ctx.getTypeSizeInChars(elemT)) { |
| if (const Optional<SVal> &V = getDirectBinding(B, superR)) { |
| if (SymbolRef parentSym = V->getAsSymbol()) |
| return svalBuilder.getDerivedRegionValueSymbolVal(parentSym, R); |
| |
| if (V->isUnknownOrUndef()) |
| return *V; |
| // Other cases: give up. We are indexing into a larger object |
| // that has some value, but we don't know how to handle that yet. |
| return UnknownVal(); |
| } |
| } |
| } |
| } |
| } |
| return RetrieveFieldOrElementCommon(store, R, R->getElementType(), superR); |
| } |
| |
| SVal RegionStoreManager::RetrieveField(Store store, |
| const FieldRegion* R) { |
| |
| // Check if the region has a binding. |
| RegionBindings B = GetRegionBindings(store); |
| if (const Optional<SVal> &V = getDirectBinding(B, R)) |
| return *V; |
| |
| QualType Ty = R->getValueType(); |
| return RetrieveFieldOrElementCommon(store, R, Ty, R->getSuperRegion()); |
| } |
| |
| Optional<SVal> |
| RegionStoreManager::RetrieveDerivedDefaultValue(RegionBindings B, |
| const MemRegion *superR, |
| const TypedValueRegion *R, |
| QualType Ty) { |
| |
| if (const Optional<SVal> &D = getDefaultBinding(B, superR)) { |
| const SVal &val = D.getValue(); |
| if (SymbolRef parentSym = val.getAsSymbol()) |
| return svalBuilder.getDerivedRegionValueSymbolVal(parentSym, R); |
| |
| if (val.isZeroConstant()) |
| return svalBuilder.makeZeroVal(Ty); |
| |
| if (val.isUnknownOrUndef()) |
| return val; |
| |
| // Lazy bindings are handled later. |
| if (isa<nonloc::LazyCompoundVal>(val)) |
| return Optional<SVal>(); |
| |
| assert(0 && "Unknown default value"); |
| } |
| |
| return Optional<SVal>(); |
| } |
| |
| SVal RegionStoreManager::RetrieveLazyBinding(const MemRegion *lazyBindingRegion, |
| Store lazyBindingStore) { |
| if (const ElementRegion *ER = dyn_cast<ElementRegion>(lazyBindingRegion)) |
| return RetrieveElement(lazyBindingStore, ER); |
| |
| return RetrieveField(lazyBindingStore, |
| cast<FieldRegion>(lazyBindingRegion)); |
| } |
| |
| SVal RegionStoreManager::RetrieveFieldOrElementCommon(Store store, |
| const TypedValueRegion *R, |
| QualType Ty, |
| const MemRegion *superR) { |
| |
| // At this point we have already checked in either RetrieveElement or |
| // RetrieveField if 'R' has a direct binding. |
| |
| RegionBindings B = GetRegionBindings(store); |
| |
| while (superR) { |
| if (const Optional<SVal> &D = |
| RetrieveDerivedDefaultValue(B, superR, R, Ty)) |
| return *D; |
| |
| // If our super region is a field or element itself, walk up the region |
| // hierarchy to see if there is a default value installed in an ancestor. |
| if (const SubRegion *SR = dyn_cast<SubRegion>(superR)) { |
| superR = SR->getSuperRegion(); |
| continue; |
| } |
| break; |
| } |
| |
| // Lazy binding? |
| Store lazyBindingStore = NULL; |
| const MemRegion *lazyBindingRegion = NULL; |
| llvm::tie(lazyBindingStore, lazyBindingRegion) = GetLazyBinding(B, R, R); |
| |
| if (lazyBindingRegion) |
| return RetrieveLazyBinding(lazyBindingRegion, lazyBindingStore); |
| |
| if (R->hasStackNonParametersStorage()) { |
| if (const ElementRegion *ER = dyn_cast<ElementRegion>(R)) { |
| // Currently we don't reason specially about Clang-style vectors. Check |
| // if superR is a vector and if so return Unknown. |
| if (const TypedValueRegion *typedSuperR = |
| dyn_cast<TypedValueRegion>(superR)) { |
| if (typedSuperR->getValueType()->isVectorType()) |
| return UnknownVal(); |
| } |
| |
| // FIXME: We also need to take ElementRegions with symbolic indexes into |
| // account. |
| if (!ER->getIndex().isConstant()) |
| return UnknownVal(); |
| } |
| |
| return UndefinedVal(); |
| } |
| |
| // All other values are symbolic. |
| return svalBuilder.getRegionValueSymbolVal(R); |
| } |
| |
| SVal RegionStoreManager::RetrieveObjCIvar(Store store, const ObjCIvarRegion* R){ |
| |
| // Check if the region has a binding. |
| RegionBindings B = GetRegionBindings(store); |
| |
| if (const Optional<SVal> &V = getDirectBinding(B, R)) |
| return *V; |
| |
| const MemRegion *superR = R->getSuperRegion(); |
| |
| // Check if the super region has a default binding. |
| if (const Optional<SVal> &V = getDefaultBinding(B, superR)) { |
| if (SymbolRef parentSym = V->getAsSymbol()) |
| return svalBuilder.getDerivedRegionValueSymbolVal(parentSym, R); |
| |
| // Other cases: give up. |
| return UnknownVal(); |
| } |
| |
| return RetrieveLazySymbol(R); |
| } |
| |
| SVal RegionStoreManager::RetrieveVar(Store store, const VarRegion *R) { |
| |
| // Check if the region has a binding. |
| RegionBindings B = GetRegionBindings(store); |
| |
| if (const Optional<SVal> &V = getDirectBinding(B, R)) |
| return *V; |
| |
| // Lazily derive a value for the VarRegion. |
| const VarDecl *VD = R->getDecl(); |
| QualType T = VD->getType(); |
| const MemSpaceRegion *MS = R->getMemorySpace(); |
| |
| if (isa<UnknownSpaceRegion>(MS) || |
| isa<StackArgumentsSpaceRegion>(MS)) |
| return svalBuilder.getRegionValueSymbolVal(R); |
| |
| if (isa<GlobalsSpaceRegion>(MS)) { |
| if (isa<NonStaticGlobalSpaceRegion>(MS)) { |
| // Is 'VD' declared constant? If so, retrieve the constant value. |
| QualType CT = Ctx.getCanonicalType(T); |
| if (CT.isConstQualified()) { |
| const Expr *Init = VD->getInit(); |
| // Do the null check first, as we want to call 'IgnoreParenCasts'. |
| if (Init) |
| if (const IntegerLiteral *IL = |
| dyn_cast<IntegerLiteral>(Init->IgnoreParenCasts())) { |
| const nonloc::ConcreteInt &V = svalBuilder.makeIntVal(IL); |
| return svalBuilder.evalCast(V, Init->getType(), IL->getType()); |
| } |
| } |
| |
| if (const Optional<SVal> &V = RetrieveDerivedDefaultValue(B, MS, R, CT)) |
| return V.getValue(); |
| |
| return svalBuilder.getRegionValueSymbolVal(R); |
| } |
| |
| if (T->isIntegerType()) |
| return svalBuilder.makeIntVal(0, T); |
| if (T->isPointerType()) |
| return svalBuilder.makeNull(); |
| |
| return UnknownVal(); |
| } |
| |
| return UndefinedVal(); |
| } |
| |
| SVal RegionStoreManager::RetrieveLazySymbol(const TypedValueRegion *R) { |
| // All other values are symbolic. |
| return svalBuilder.getRegionValueSymbolVal(R); |
| } |
| |
| SVal RegionStoreManager::RetrieveStruct(Store store, |
| const TypedValueRegion* R) { |
| QualType T = R->getValueType(); |
| assert(T->isStructureOrClassType()); |
| return svalBuilder.makeLazyCompoundVal(StoreRef(store, *this), R); |
| } |
| |
| SVal RegionStoreManager::RetrieveArray(Store store, |
| const TypedValueRegion * R) { |
| assert(Ctx.getAsConstantArrayType(R->getValueType())); |
| return svalBuilder.makeLazyCompoundVal(StoreRef(store, *this), R); |
| } |
| |
| bool RegionStoreManager::includedInBindings(Store store, |
| const MemRegion *region) const { |
| RegionBindings B = GetRegionBindings(store); |
| region = region->getBaseRegion(); |
| |
| for (RegionBindings::iterator it = B.begin(), ei = B.end(); it != ei; ++it) { |
| const BindingKey &K = it.getKey(); |
| if (region == K.getRegion()) |
| return true; |
| const SVal &D = it.getData(); |
| if (const MemRegion *r = D.getAsRegion()) |
| if (r == region) |
| return true; |
| } |
| return false; |
| } |
| |
| //===----------------------------------------------------------------------===// |
| // Binding values to regions. |
| //===----------------------------------------------------------------------===// |
| |
| StoreRef RegionStoreManager::Remove(Store store, Loc L) { |
| if (isa<loc::MemRegionVal>(L)) |
| if (const MemRegion* R = cast<loc::MemRegionVal>(L).getRegion()) |
| return StoreRef(removeBinding(GetRegionBindings(store), |
| R).getRootWithoutRetain(), |
| *this); |
| |
| return StoreRef(store, *this); |
| } |
| |
| StoreRef RegionStoreManager::Bind(Store store, Loc L, SVal V) { |
| if (isa<loc::ConcreteInt>(L)) |
| return StoreRef(store, *this); |
| |
| // If we get here, the location should be a region. |
| const MemRegion *R = cast<loc::MemRegionVal>(L).getRegion(); |
| |
| // Check if the region is a struct region. |
| if (const TypedValueRegion* TR = dyn_cast<TypedValueRegion>(R)) |
| if (TR->getValueType()->isStructureOrClassType()) |
| return BindStruct(store, TR, V); |
| |
| if (const ElementRegion *ER = dyn_cast<ElementRegion>(R)) { |
| if (ER->getIndex().isZeroConstant()) { |
| if (const TypedValueRegion *superR = |
| dyn_cast<TypedValueRegion>(ER->getSuperRegion())) { |
| QualType superTy = superR->getValueType(); |
| // For now, just invalidate the fields of the struct/union/class. |
| // This is for test rdar_test_7185607 in misc-ps-region-store.m. |
| // FIXME: Precisely handle the fields of the record. |
| if (superTy->isStructureOrClassType()) |
| return KillStruct(store, superR, UnknownVal()); |
| } |
| } |
| } |
| else if (const SymbolicRegion *SR = dyn_cast<SymbolicRegion>(R)) { |
| // Binding directly to a symbolic region should be treated as binding |
| // to element 0. |
| QualType T = SR->getSymbol()->getType(Ctx); |
| |
| // FIXME: Is this the right way to handle symbols that are references? |
| if (const PointerType *PT = T->getAs<PointerType>()) |
| T = PT->getPointeeType(); |
| else |
| T = T->getAs<ReferenceType>()->getPointeeType(); |
| |
| R = GetElementZeroRegion(SR, T); |
| } |
| |
| // Perform the binding. |
| RegionBindings B = GetRegionBindings(store); |
| return StoreRef(addBinding(B, R, BindingKey::Direct, |
| V).getRootWithoutRetain(), *this); |
| } |
| |
| StoreRef RegionStoreManager::BindDecl(Store store, const VarRegion *VR, |
| SVal InitVal) { |
| |
| QualType T = VR->getDecl()->getType(); |
| |
| if (T->isArrayType()) |
| return BindArray(store, VR, InitVal); |
| if (T->isStructureOrClassType()) |
| return BindStruct(store, VR, InitVal); |
| |
| return Bind(store, svalBuilder.makeLoc(VR), InitVal); |
| } |
| |
| // FIXME: this method should be merged into Bind(). |
| StoreRef RegionStoreManager::BindCompoundLiteral(Store store, |
| const CompoundLiteralExpr *CL, |
| const LocationContext *LC, |
| SVal V) { |
| return Bind(store, loc::MemRegionVal(MRMgr.getCompoundLiteralRegion(CL, LC)), |
| V); |
| } |
| |
| StoreRef RegionStoreManager::setImplicitDefaultValue(Store store, |
| const MemRegion *R, |
| QualType T) { |
| RegionBindings B = GetRegionBindings(store); |
| SVal V; |
| |
| if (Loc::isLocType(T)) |
| V = svalBuilder.makeNull(); |
| else if (T->isIntegerType()) |
| V = svalBuilder.makeZeroVal(T); |
| else if (T->isStructureOrClassType() || T->isArrayType()) { |
| // Set the default value to a zero constant when it is a structure |
| // or array. The type doesn't really matter. |
| V = svalBuilder.makeZeroVal(Ctx.IntTy); |
| } |
| else { |
| // We can't represent values of this type, but we still need to set a value |
| // to record that the region has been initialized. |
| // If this assertion ever fires, a new case should be added above -- we |
| // should know how to default-initialize any value we can symbolicate. |
| assert(!SymbolManager::canSymbolicate(T) && "This type is representable"); |
| V = UnknownVal(); |
| } |
| |
| return StoreRef(addBinding(B, R, BindingKey::Default, |
| V).getRootWithoutRetain(), *this); |
| } |
| |
| StoreRef RegionStoreManager::BindArray(Store store, const TypedValueRegion* R, |
| SVal Init) { |
| |
| const ArrayType *AT =cast<ArrayType>(Ctx.getCanonicalType(R->getValueType())); |
| QualType ElementTy = AT->getElementType(); |
| Optional<uint64_t> Size; |
| |
| if (const ConstantArrayType* CAT = dyn_cast<ConstantArrayType>(AT)) |
| Size = CAT->getSize().getZExtValue(); |
| |
| // Check if the init expr is a string literal. |
| if (loc::MemRegionVal *MRV = dyn_cast<loc::MemRegionVal>(&Init)) { |
| const StringRegion *S = cast<StringRegion>(MRV->getRegion()); |
| |
| // Treat the string as a lazy compound value. |
| nonloc::LazyCompoundVal LCV = |
| cast<nonloc::LazyCompoundVal>(svalBuilder. |
| makeLazyCompoundVal(StoreRef(store, *this), S)); |
| return CopyLazyBindings(LCV, store, R); |
| } |
| |
| // Handle lazy compound values. |
| if (nonloc::LazyCompoundVal *LCV = dyn_cast<nonloc::LazyCompoundVal>(&Init)) |
| return CopyLazyBindings(*LCV, store, R); |
| |
| // Remaining case: explicit compound values. |
| |
| if (Init.isUnknown()) |
| return setImplicitDefaultValue(store, R, ElementTy); |
| |
| nonloc::CompoundVal& CV = cast<nonloc::CompoundVal>(Init); |
| nonloc::CompoundVal::iterator VI = CV.begin(), VE = CV.end(); |
| uint64_t i = 0; |
| |
| StoreRef newStore(store, *this); |
| for (; Size.hasValue() ? i < Size.getValue() : true ; ++i, ++VI) { |
| // The init list might be shorter than the array length. |
| if (VI == VE) |
| break; |
| |
| const NonLoc &Idx = svalBuilder.makeArrayIndex(i); |
| const ElementRegion *ER = MRMgr.getElementRegion(ElementTy, Idx, R, Ctx); |
| |
| if (ElementTy->isStructureOrClassType()) |
| newStore = BindStruct(newStore.getStore(), ER, *VI); |
| else if (ElementTy->isArrayType()) |
| newStore = BindArray(newStore.getStore(), ER, *VI); |
| else |
| newStore = Bind(newStore.getStore(), svalBuilder.makeLoc(ER), *VI); |
| } |
| |
| // If the init list is shorter than the array length, set the |
| // array default value. |
| if (Size.hasValue() && i < Size.getValue()) |
| newStore = setImplicitDefaultValue(newStore.getStore(), R, ElementTy); |
| |
| return newStore; |
| } |
| |
| StoreRef RegionStoreManager::BindStruct(Store store, const TypedValueRegion* R, |
| SVal V) { |
| |
| if (!Features.supportsFields()) |
| return StoreRef(store, *this); |
| |
| QualType T = R->getValueType(); |
| assert(T->isStructureOrClassType()); |
| |
| const RecordType* RT = T->getAs<RecordType>(); |
| RecordDecl *RD = RT->getDecl(); |
| |
| if (!RD->isDefinition()) |
| return StoreRef(store, *this); |
| |
| // Handle lazy compound values. |
| if (const nonloc::LazyCompoundVal *LCV=dyn_cast<nonloc::LazyCompoundVal>(&V)) |
| return CopyLazyBindings(*LCV, store, R); |
| |
| // We may get non-CompoundVal accidentally due to imprecise cast logic or |
| // that we are binding symbolic struct value. Kill the field values, and if |
| // the value is symbolic go and bind it as a "default" binding. |
| if (V.isUnknown() || !isa<nonloc::CompoundVal>(V)) { |
| SVal SV = isa<nonloc::SymbolVal>(V) ? V : UnknownVal(); |
| return KillStruct(store, R, SV); |
| } |
| |
| nonloc::CompoundVal& CV = cast<nonloc::CompoundVal>(V); |
| nonloc::CompoundVal::iterator VI = CV.begin(), VE = CV.end(); |
| |
| RecordDecl::field_iterator FI, FE; |
| StoreRef newStore(store, *this); |
| |
| for (FI = RD->field_begin(), FE = RD->field_end(); FI != FE; ++FI, ++VI) { |
| |
| if (VI == VE) |
| break; |
| |
| QualType FTy = (*FI)->getType(); |
| const FieldRegion* FR = MRMgr.getFieldRegion(*FI, R); |
| |
| if (FTy->isArrayType()) |
| newStore = BindArray(newStore.getStore(), FR, *VI); |
| else if (FTy->isStructureOrClassType()) |
| newStore = BindStruct(newStore.getStore(), FR, *VI); |
| else |
| newStore = Bind(newStore.getStore(), svalBuilder.makeLoc(FR), *VI); |
| } |
| |
| // There may be fewer values in the initialize list than the fields of struct. |
| if (FI != FE) { |
| RegionBindings B = GetRegionBindings(newStore.getStore()); |
| B = addBinding(B, R, BindingKey::Default, svalBuilder.makeIntVal(0, false)); |
| newStore = StoreRef(B.getRootWithoutRetain(), *this); |
| } |
| |
| return newStore; |
| } |
| |
| StoreRef RegionStoreManager::KillStruct(Store store, const TypedRegion* R, |
| SVal DefaultVal) { |
| BindingKey key = BindingKey::Make(R, BindingKey::Default); |
| |
| // The BindingKey may be "invalid" if we cannot handle the region binding |
| // explicitly. One example is something like array[index], where index |
| // is a symbolic value. In such cases, we want to invalidate the entire |
| // array, as the index assignment could have been to any element. In |
| // the case of nested symbolic indices, we need to march up the region |
| // hierarchy untile we reach a region whose binding we can reason about. |
| const SubRegion *subReg = R; |
| |
| while (!key.isValid()) { |
| if (const SubRegion *tmp = dyn_cast<SubRegion>(subReg->getSuperRegion())) { |
| subReg = tmp; |
| key = BindingKey::Make(tmp, BindingKey::Default); |
| } |
| else |
| break; |
| } |
| |
| // Remove the old bindings, using 'subReg' as the root of all regions |
| // we will invalidate. |
| RegionBindings B = GetRegionBindings(store); |
| llvm::OwningPtr<RegionStoreSubRegionMap> |
| SubRegions(getRegionStoreSubRegionMap(store)); |
| RemoveSubRegionBindings(B, subReg, *SubRegions); |
| |
| // Set the default value of the struct region to "unknown". |
| if (!key.isValid()) |
| return StoreRef(B.getRootWithoutRetain(), *this); |
| |
| return StoreRef(addBinding(B, key, DefaultVal).getRootWithoutRetain(), *this); |
| } |
| |
| StoreRef RegionStoreManager::CopyLazyBindings(nonloc::LazyCompoundVal V, |
| Store store, |
| const TypedRegion *R) { |
| |
| // Nuke the old bindings stemming from R. |
| RegionBindings B = GetRegionBindings(store); |
| |
| llvm::OwningPtr<RegionStoreSubRegionMap> |
| SubRegions(getRegionStoreSubRegionMap(store)); |
| |
| // B and DVM are updated after the call to RemoveSubRegionBindings. |
| RemoveSubRegionBindings(B, R, *SubRegions.get()); |
| |
| // Now copy the bindings. This amounts to just binding 'V' to 'R'. This |
| // results in a zero-copy algorithm. |
| return StoreRef(addBinding(B, R, BindingKey::Default, |
| V).getRootWithoutRetain(), *this); |
| } |
| |
| //===----------------------------------------------------------------------===// |
| // "Raw" retrievals and bindings. |
| //===----------------------------------------------------------------------===// |
| |
| |
| RegionBindings RegionStoreManager::addBinding(RegionBindings B, BindingKey K, |
| SVal V) { |
| if (!K.isValid()) |
| return B; |
| return RBFactory.add(B, K, V); |
| } |
| |
| RegionBindings RegionStoreManager::addBinding(RegionBindings B, |
| const MemRegion *R, |
| BindingKey::Kind k, SVal V) { |
| return addBinding(B, BindingKey::Make(R, k), V); |
| } |
| |
| const SVal *RegionStoreManager::lookup(RegionBindings B, BindingKey K) { |
| if (!K.isValid()) |
| return NULL; |
| return B.lookup(K); |
| } |
| |
| const SVal *RegionStoreManager::lookup(RegionBindings B, |
| const MemRegion *R, |
| BindingKey::Kind k) { |
| return lookup(B, BindingKey::Make(R, k)); |
| } |
| |
| RegionBindings RegionStoreManager::removeBinding(RegionBindings B, |
| BindingKey K) { |
| if (!K.isValid()) |
| return B; |
| return RBFactory.remove(B, K); |
| } |
| |
| RegionBindings RegionStoreManager::removeBinding(RegionBindings B, |
| const MemRegion *R, |
| BindingKey::Kind k){ |
| return removeBinding(B, BindingKey::Make(R, k)); |
| } |
| |
| //===----------------------------------------------------------------------===// |
| // State pruning. |
| //===----------------------------------------------------------------------===// |
| |
| namespace { |
| class removeDeadBindingsWorker : |
| public ClusterAnalysis<removeDeadBindingsWorker> { |
| SmallVector<const SymbolicRegion*, 12> Postponed; |
| SymbolReaper &SymReaper; |
| const StackFrameContext *CurrentLCtx; |
| |
| public: |
| removeDeadBindingsWorker(RegionStoreManager &rm, ProgramStateManager &stateMgr, |
| RegionBindings b, SymbolReaper &symReaper, |
| const StackFrameContext *LCtx) |
| : ClusterAnalysis<removeDeadBindingsWorker>(rm, stateMgr, b, |
| /* includeGlobals = */ false), |
| SymReaper(symReaper), CurrentLCtx(LCtx) {} |
| |
| // Called by ClusterAnalysis. |
| void VisitAddedToCluster(const MemRegion *baseR, RegionCluster &C); |
| void VisitCluster(const MemRegion *baseR, BindingKey *I, BindingKey *E); |
| |
| void VisitBindingKey(BindingKey K); |
| bool UpdatePostponed(); |
| void VisitBinding(SVal V); |
| }; |
| } |
| |
| void removeDeadBindingsWorker::VisitAddedToCluster(const MemRegion *baseR, |
| RegionCluster &C) { |
| |
| if (const VarRegion *VR = dyn_cast<VarRegion>(baseR)) { |
| if (SymReaper.isLive(VR)) |
| AddToWorkList(baseR, C); |
| |
| return; |
| } |
| |
| if (const SymbolicRegion *SR = dyn_cast<SymbolicRegion>(baseR)) { |
| if (SymReaper.isLive(SR->getSymbol())) |
| AddToWorkList(SR, C); |
| else |
| Postponed.push_back(SR); |
| |
| return; |
| } |
| |
| if (isa<NonStaticGlobalSpaceRegion>(baseR)) { |
| AddToWorkList(baseR, C); |
| return; |
| } |
| |
| // CXXThisRegion in the current or parent location context is live. |
| if (const CXXThisRegion *TR = dyn_cast<CXXThisRegion>(baseR)) { |
| const StackArgumentsSpaceRegion *StackReg = |
| cast<StackArgumentsSpaceRegion>(TR->getSuperRegion()); |
| const StackFrameContext *RegCtx = StackReg->getStackFrame(); |
| if (RegCtx == CurrentLCtx || RegCtx->isParentOf(CurrentLCtx)) |
| AddToWorkList(TR, C); |
| } |
| } |
| |
| void removeDeadBindingsWorker::VisitCluster(const MemRegion *baseR, |
| BindingKey *I, BindingKey *E) { |
| for ( ; I != E; ++I) |
| VisitBindingKey(*I); |
| } |
| |
| void removeDeadBindingsWorker::VisitBinding(SVal V) { |
| // Is it a LazyCompoundVal? All referenced regions are live as well. |
| if (const nonloc::LazyCompoundVal *LCS = |
| dyn_cast<nonloc::LazyCompoundVal>(&V)) { |
| |
| const MemRegion *LazyR = LCS->getRegion(); |
| RegionBindings B = RegionStoreManager::GetRegionBindings(LCS->getStore()); |
| for (RegionBindings::iterator RI = B.begin(), RE = B.end(); RI != RE; ++RI){ |
| const SubRegion *baseR = dyn_cast<SubRegion>(RI.getKey().getRegion()); |
| if (baseR && baseR->isSubRegionOf(LazyR)) |
| VisitBinding(RI.getData()); |
| } |
| return; |
| } |
| |
| // If V is a region, then add it to the worklist. |
| if (const MemRegion *R = V.getAsRegion()) |
| AddToWorkList(R); |
| |
| // Update the set of live symbols. |
| for (SVal::symbol_iterator SI=V.symbol_begin(), SE=V.symbol_end(); |
| SI!=SE;++SI) |
| SymReaper.markLive(*SI); |
| } |
| |
| void removeDeadBindingsWorker::VisitBindingKey(BindingKey K) { |
| const MemRegion *R = K.getRegion(); |
| |
| // Mark this region "live" by adding it to the worklist. This will cause |
| // use to visit all regions in the cluster (if we haven't visited them |
| // already). |
| if (AddToWorkList(R)) { |
| // Mark the symbol for any live SymbolicRegion as "live". This means we |
| // should continue to track that symbol. |
| if (const SymbolicRegion *SymR = dyn_cast<SymbolicRegion>(R)) |
| SymReaper.markLive(SymR->getSymbol()); |
| |
| // For BlockDataRegions, enqueue the VarRegions for variables marked |
| // with __block (passed-by-reference). |
| // via BlockDeclRefExprs. |
| if (const BlockDataRegion *BD = dyn_cast<BlockDataRegion>(R)) { |
| for (BlockDataRegion::referenced_vars_iterator |
| RI = BD->referenced_vars_begin(), RE = BD->referenced_vars_end(); |
| RI != RE; ++RI) { |
| if ((*RI)->getDecl()->getAttr<BlocksAttr>()) |
| AddToWorkList(*RI); |
| } |
| |
| // No possible data bindings on a BlockDataRegion. |
| return; |
| } |
| } |
| |
| // Visit the data binding for K. |
| if (const SVal *V = RM.lookup(B, K)) |
| VisitBinding(*V); |
| } |
| |
| bool removeDeadBindingsWorker::UpdatePostponed() { |
| // See if any postponed SymbolicRegions are actually live now, after |
| // having done a scan. |
| bool changed = false; |
| |
| for (SmallVectorImpl<const SymbolicRegion*>::iterator |
| I = Postponed.begin(), E = Postponed.end() ; I != E ; ++I) { |
| if (const SymbolicRegion *SR = cast_or_null<SymbolicRegion>(*I)) { |
| if (SymReaper.isLive(SR->getSymbol())) { |
| changed |= AddToWorkList(SR); |
| *I = NULL; |
| } |
| } |
| } |
| |
| return changed; |
| } |
| |
| StoreRef RegionStoreManager::removeDeadBindings(Store store, |
| const StackFrameContext *LCtx, |
| SymbolReaper& SymReaper) { |
| RegionBindings B = GetRegionBindings(store); |
| removeDeadBindingsWorker W(*this, StateMgr, B, SymReaper, LCtx); |
| W.GenerateClusters(); |
| |
| // Enqueue the region roots onto the worklist. |
| for (SymbolReaper::region_iterator I = SymReaper.region_begin(), |
| E = SymReaper.region_end(); I != E; ++I) { |
| W.AddToWorkList(*I); |
| } |
| |
| do W.RunWorkList(); while (W.UpdatePostponed()); |
| |
| // We have now scanned the store, marking reachable regions and symbols |
| // as live. We now remove all the regions that are dead from the store |
| // as well as update DSymbols with the set symbols that are now dead. |
| for (RegionBindings::iterator I = B.begin(), E = B.end(); I != E; ++I) { |
| const BindingKey &K = I.getKey(); |
| |
| // If the cluster has been visited, we know the region has been marked. |
| if (W.isVisited(K.getRegion())) |
| continue; |
| |
| // Remove the dead entry. |
| B = removeBinding(B, K); |
| |
| // Mark all non-live symbols that this binding references as dead. |
| if (const SymbolicRegion* SymR = dyn_cast<SymbolicRegion>(K.getRegion())) |
| SymReaper.maybeDead(SymR->getSymbol()); |
| |
| SVal X = I.getData(); |
| SVal::symbol_iterator SI = X.symbol_begin(), SE = X.symbol_end(); |
| for (; SI != SE; ++SI) |
| SymReaper.maybeDead(*SI); |
| } |
| |
| return StoreRef(B.getRootWithoutRetain(), *this); |
| } |
| |
| |
| StoreRef RegionStoreManager::enterStackFrame(const ProgramState *state, |
| const StackFrameContext *frame) { |
| FunctionDecl const *FD = cast<FunctionDecl>(frame->getDecl()); |
| FunctionDecl::param_const_iterator PI = FD->param_begin(), |
| PE = FD->param_end(); |
| StoreRef store = StoreRef(state->getStore(), *this); |
| |
| if (CallExpr const *CE = dyn_cast<CallExpr>(frame->getCallSite())) { |
| CallExpr::const_arg_iterator AI = CE->arg_begin(), AE = CE->arg_end(); |
| |
| // Copy the arg expression value to the arg variables. We check that |
| // PI != PE because the actual number of arguments may be different than |
| // the function declaration. |
| for (; AI != AE && PI != PE; ++AI, ++PI) { |
| SVal ArgVal = state->getSVal(*AI); |
| store = Bind(store.getStore(), |
| svalBuilder.makeLoc(MRMgr.getVarRegion(*PI, frame)), ArgVal); |
| } |
| } else if (const CXXConstructExpr *CE = |
| dyn_cast<CXXConstructExpr>(frame->getCallSite())) { |
| CXXConstructExpr::const_arg_iterator AI = CE->arg_begin(), |
| AE = CE->arg_end(); |
| |
| // Copy the arg expression value to the arg variables. |
| for (; AI != AE; ++AI, ++PI) { |
| SVal ArgVal = state->getSVal(*AI); |
| store = Bind(store.getStore(), |
| svalBuilder.makeLoc(MRMgr.getVarRegion(*PI,frame)), ArgVal); |
| } |
| } else |
| assert(isa<CXXDestructorDecl>(frame->getDecl())); |
| |
| return store; |
| } |
| |
| //===----------------------------------------------------------------------===// |
| // Utility methods. |
| //===----------------------------------------------------------------------===// |
| |
| void RegionStoreManager::print(Store store, raw_ostream &OS, |
| const char* nl, const char *sep) { |
| RegionBindings B = GetRegionBindings(store); |
| OS << "Store (direct and default bindings):" << nl; |
| |
| for (RegionBindings::iterator I = B.begin(), E = B.end(); I != E; ++I) |
| OS << ' ' << I.getKey() << " : " << I.getData() << nl; |
| } |