Update clang to r96341.

1 files changed, 230 insertions, 0 deletions

diff --git a/include/clang/Checker/PathSensitive/Store.h b/include/clang/Checker/PathSensitive/Store.h
new file mode 100644
index 0000000..c660e7b
--- /dev/null
+++ b/include/clang/Checker/PathSensitive/Store.h
@@ -0,0 +1,230 @@
+//== 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