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Diffstat (limited to 'include/clang/Analysis/PathSensitive/Store.h')
-rw-r--r-- | include/clang/Analysis/PathSensitive/Store.h | 204 |
1 files changed, 204 insertions, 0 deletions
diff --git a/include/clang/Analysis/PathSensitive/Store.h b/include/clang/Analysis/PathSensitive/Store.h new file mode 100644 index 0000000..1f081f4 --- /dev/null +++ b/include/clang/Analysis/PathSensitive/Store.h @@ -0,0 +1,204 @@ +//== 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/Analysis/PathSensitive/SVals.h" +#include "clang/Analysis/PathSensitive/MemRegion.h" +#include "clang/Analysis/PathSensitive/ValueManager.h" +#include "llvm/ADT/SmallPtrSet.h" +#include "llvm/ADT/SmallSet.h" +#include "llvm/ADT/DenseSet.h" +#include "llvm/ADT/SmallVector.h" +#include <iosfwd> + +namespace clang { + +typedef const void* Store; + +class GRState; +class GRStateManager; +class Stmt; +class Expr; +class ObjCIvarDecl; +class SubRegionMap; + +class StoreManager { +protected: + ValueManager &ValMgr; + GRStateManager &StateMgr; + + /// MRMgr - Manages region objects associated with this StoreManager. + MemRegionManager &MRMgr; + + StoreManager(GRStateManager &stateMgr); + +protected: + virtual const GRState* AddRegionView(const GRState* St, + const MemRegion* View, + const MemRegion* Base) { + return St; + } + +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(const GRState* state, 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 const GRState* Bind(const GRState* state, 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 const GRState* BindCompoundLiteral(const GRState* St, + const CompoundLiteralExpr* CL, + SVal V) = 0; + + /// getInitialStore - Returns the initial "empty" store representing the + /// value bindings upon entry to an analyzed function. + virtual Store getInitialStore() = 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(const GRState *state) = 0; + + virtual SVal getLValueVar(const GRState* St, const VarDecl* VD) = 0; + + virtual SVal getLValueString(const GRState* St, const StringLiteral* S) = 0; + + virtual SVal getLValueCompoundLiteral(const GRState* St, + const CompoundLiteralExpr* CL) = 0; + + virtual SVal getLValueIvar(const GRState* St, const ObjCIvarDecl* D, + SVal Base) = 0; + + virtual SVal getLValueField(const GRState* St, SVal Base, + const FieldDecl* D) = 0; + + virtual SVal getLValueElement(const GRState* St, QualType elementType, + SVal Base, SVal Offset) = 0; + + virtual SVal getSizeInElements(const GRState* St, const MemRegion* R) { + 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* R; + public: + const GRState* getState() const { return State; } + const MemRegion* getRegion() const { return R; } + CastResult(const GRState* s, const MemRegion* r = 0) : State(s), R(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. + virtual CastResult CastRegion(const GRState* state, const MemRegion* R, + QualType CastToTy); + + /// EvalBinOp - Perform pointer arithmetic. + virtual SVal EvalBinOp(const GRState *state, + BinaryOperator::Opcode Op, Loc L, NonLoc R) { + return UnknownVal(); + } + + /// getSelfRegion - Returns the region for the 'self' (Objective-C) or + /// 'this' object (C++). When used when analyzing a normal function this + /// method returns NULL. + virtual const MemRegion* getSelfRegion(Store store) = 0; + + virtual Store + RemoveDeadBindings(const GRState* state, Stmt* Loc, SymbolReaper& SymReaper, + llvm::SmallVectorImpl<const MemRegion*>& RegionRoots) = 0; + + virtual const GRState* BindDecl(const GRState* St, const VarDecl* VD, + SVal InitVal) = 0; + + virtual const GRState* BindDeclWithNoInit(const GRState* St, + const VarDecl* VD) = 0; + + virtual const GRState* setExtent(const GRState* St, + const MemRegion* R, SVal Extent) { + return St; + } + + virtual const GRState* setDefaultValue(const GRState* St, + const MemRegion* R, SVal V) { + return St; + } + + virtual void print(Store store, std::ostream& Out, + const char* nl, const char *sep) = 0; + + class BindingsHandler { + public: + virtual ~BindingsHandler(); + virtual bool HandleBinding(StoreManager& SMgr, Store store, + const MemRegion* R, SVal val) = 0; + }; + + /// iterBindings - Iterate over the bindings in the Store. + virtual void iterBindings(Store store, BindingsHandler& f) = 0; +}; + +/// 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* R, Visitor& V) const = 0; +}; + +StoreManager* CreateBasicStoreManager(GRStateManager& StMgr); +StoreManager* CreateRegionStoreManager(GRStateManager& StMgr); + +} // end clang namespace + +#endif |