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+//== Store.h - Interface for maps from Locations to Values ------*- C++ -*--==//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file defined the types Store and StoreManager.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_CLANG_ANALYSIS_STORE_H
+#define LLVM_CLANG_ANALYSIS_STORE_H
+
+#include "clang/Checker/PathSensitive/MemRegion.h"
+#include "clang/Checker/PathSensitive/SVals.h"
+#include "clang/Checker/PathSensitive/ValueManager.h"
+#include "llvm/ADT/DenseSet.h"
+#include "llvm/ADT/SmallPtrSet.h"
+#include "llvm/ADT/SmallSet.h"
+#include "llvm/ADT/SmallVector.h"
+
+namespace clang {
+
+typedef const void* Store;
+
+class GRState;
+class GRStateManager;
+class Stmt;
+class Expr;
+class ObjCIvarDecl;
+class SubRegionMap;
+class StackFrameContext;
+
+class StoreManager {
+protected:
+ ValueManager &ValMgr;
+ GRStateManager &StateMgr;
+
+ /// MRMgr - Manages region objects associated with this StoreManager.
+ MemRegionManager &MRMgr;
+ ASTContext &Ctx;
+
+ StoreManager(GRStateManager &stateMgr);
+
+public:
+ virtual ~StoreManager() {}
+
+ /// Return the value bound to specified location in a given state.
+ /// \param[in] state The analysis state.
+ /// \param[in] loc The symbolic memory location.
+ /// \param[in] T An optional type that provides a hint indicating the
+ /// expected type of the returned value. This is used if the value is
+ /// lazily computed.
+ /// \return The value bound to the location \c loc.
+ virtual SVal Retrieve(Store store, Loc loc, QualType T = QualType()) = 0;
+
+ /// Return a state with the specified value bound to the given location.
+ /// \param[in] state The analysis state.
+ /// \param[in] loc The symbolic memory location.
+ /// \param[in] val The value to bind to location \c loc.
+ /// \return A pointer to a GRState object that contains the same bindings as
+ /// \c state with the addition of having the value specified by \c val bound
+ /// to the location given for \c loc.
+ virtual Store Bind(Store store, Loc loc, SVal val) = 0;
+
+ virtual Store Remove(Store St, Loc L) = 0;
+
+ /// BindCompoundLiteral - Return the store that has the bindings currently
+ /// in 'store' plus the bindings for the CompoundLiteral. 'R' is the region
+ /// for the compound literal and 'BegInit' and 'EndInit' represent an
+ /// array of initializer values.
+ virtual Store BindCompoundLiteral(Store store,
+ const CompoundLiteralExpr* cl,
+ const LocationContext *LC, SVal v) = 0;
+
+ /// getInitialStore - Returns the initial "empty" store representing the
+ /// value bindings upon entry to an analyzed function.
+ virtual Store getInitialStore(const LocationContext *InitLoc) = 0;
+
+ /// getRegionManager - Returns the internal RegionManager object that is
+ /// used to query and manipulate MemRegion objects.
+ MemRegionManager& getRegionManager() { return MRMgr; }
+
+ /// getSubRegionMap - Returns an opaque map object that clients can query
+ /// to get the subregions of a given MemRegion object. It is the
+ // caller's responsibility to 'delete' the returned map.
+ virtual SubRegionMap *getSubRegionMap(Store store) = 0;
+
+ virtual SVal getLValueVar(const VarDecl *VD, const LocationContext *LC) {
+ return ValMgr.makeLoc(MRMgr.getVarRegion(VD, LC));
+ }
+
+ virtual SVal getLValueString(const StringLiteral* S) {
+ return ValMgr.makeLoc(MRMgr.getStringRegion(S));
+ }
+
+ SVal getLValueCompoundLiteral(const CompoundLiteralExpr* CL,
+ const LocationContext *LC) {
+ return loc::MemRegionVal(MRMgr.getCompoundLiteralRegion(CL, LC));
+ }
+
+ virtual SVal getLValueIvar(const ObjCIvarDecl* decl, SVal base) {
+ return getLValueFieldOrIvar(decl, base);
+ }
+
+ virtual SVal getLValueField(const FieldDecl* D, SVal Base) {
+ return getLValueFieldOrIvar(D, Base);
+ }
+
+ virtual SVal getLValueElement(QualType elementType, SVal offset, SVal Base);
+
+ // FIXME: Make out-of-line.
+ virtual DefinedOrUnknownSVal getSizeInElements(const GRState *state,
+ const MemRegion *region,
+ QualType EleTy) {
+ return UnknownVal();
+ }
+
+ /// ArrayToPointer - Used by GRExprEngine::VistCast to handle implicit
+ /// conversions between arrays and pointers.
+ virtual SVal ArrayToPointer(Loc Array) = 0;
+
+ class CastResult {
+ const GRState *state;
+ const MemRegion *region;
+ public:
+ const GRState *getState() const { return state; }
+ const MemRegion* getRegion() const { return region; }
+ CastResult(const GRState *s, const MemRegion* r = 0) : state(s), region(r){}
+ };
+
+ /// CastRegion - Used by GRExprEngine::VisitCast to handle casts from
+ /// a MemRegion* to a specific location type. 'R' is the region being
+ /// casted and 'CastToTy' the result type of the cast.
+ const MemRegion *CastRegion(const MemRegion *region, QualType CastToTy);
+
+ /// EvalBinOp - Perform pointer arithmetic.
+ virtual SVal EvalBinOp(BinaryOperator::Opcode Op,
+ Loc lhs, NonLoc rhs, QualType resultTy) {
+ return UnknownVal();
+ }
+
+ virtual Store RemoveDeadBindings(Store store, Stmt* Loc,
+ SymbolReaper& SymReaper,
+ llvm::SmallVectorImpl<const MemRegion*>& RegionRoots) = 0;
+
+ virtual Store BindDecl(Store store, const VarRegion *VR, SVal initVal) = 0;
+
+ virtual Store BindDeclWithNoInit(Store store, const VarRegion *VR) = 0;
+
+ typedef llvm::DenseSet<SymbolRef> InvalidatedSymbols;
+
+ virtual Store InvalidateRegion(Store store,
+ const MemRegion *R,
+ const Expr *E, unsigned Count,
+ InvalidatedSymbols *IS) = 0;
+
+ virtual Store InvalidateRegions(Store store,
+ const MemRegion * const *Begin,
+ const MemRegion * const *End,
+ const Expr *E, unsigned Count,
+ InvalidatedSymbols *IS);
+
+ // FIXME: Make out-of-line.
+ virtual const GRState *setExtent(const GRState *state,
+ const MemRegion *region, SVal extent) {
+ return state;
+ }
+
+ /// EnterStackFrame - Let the StoreManager to do something when execution
+ /// engine is about to execute into a callee.
+ virtual const GRState *EnterStackFrame(const GRState *state,
+ const StackFrameContext *frame) {
+ return state;
+ }
+
+ virtual void print(Store store, llvm::raw_ostream& Out,
+ const char* nl, const char *sep) = 0;
+
+ class BindingsHandler {
+ public:
+ virtual ~BindingsHandler();
+ virtual bool HandleBinding(StoreManager& SMgr, Store store,
+ const MemRegion *region, SVal val) = 0;
+ };
+
+ /// iterBindings - Iterate over the bindings in the Store.
+ virtual void iterBindings(Store store, BindingsHandler& f) = 0;
+
+protected:
+ const MemRegion *MakeElementRegion(const MemRegion *Base,
+ QualType pointeeTy, uint64_t index = 0);
+
+ /// CastRetrievedVal - Used by subclasses of StoreManager to implement
+ /// implicit casts that arise from loads from regions that are reinterpreted
+ /// as another region.
+ SVal CastRetrievedVal(SVal val, const TypedRegion *R, QualType castTy,
+ bool performTestOnly = true);
+
+private:
+ SVal getLValueFieldOrIvar(const Decl* D, SVal Base);
+};
+
+// FIXME: Do we still need this?
+/// SubRegionMap - An abstract interface that represents a queryable map
+/// between MemRegion objects and their subregions.
+class SubRegionMap {
+public:
+ virtual ~SubRegionMap() {}
+
+ class Visitor {
+ public:
+ virtual ~Visitor() {}
+ virtual bool Visit(const MemRegion* Parent, const MemRegion* SubRegion) = 0;
+ };
+
+ virtual bool iterSubRegions(const MemRegion *region, Visitor& V) const = 0;
+};
+
+// FIXME: Do we need to pass GRStateManager anymore?
+StoreManager *CreateBasicStoreManager(GRStateManager& StMgr);
+StoreManager *CreateRegionStoreManager(GRStateManager& StMgr);
+StoreManager *CreateFieldsOnlyRegionStoreManager(GRStateManager& StMgr);
+StoreManager *CreateFlatStoreManager(GRStateManager &StMgr);
+} // end clang namespace
+
+#endif
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