| //== ConstraintManager.h - Constraints on symbolic 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 interface to manage constraints on symbolic values. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #ifndef LLVM_CLANG_ANALYSIS_CONSTRAINT_MANAGER_H |
| #define LLVM_CLANG_ANALYSIS_CONSTRAINT_MANAGER_H |
| |
| // FIXME: Typedef LiveSymbolsTy/DeadSymbolsTy at a more appropriate place. |
| #include "clang/GR/PathSensitive/Store.h" |
| |
| namespace llvm { |
| class APSInt; |
| } |
| |
| namespace clang { |
| |
| class GRState; |
| class GRStateManager; |
| class GRSubEngine; |
| class SVal; |
| |
| class ConstraintManager { |
| public: |
| virtual ~ConstraintManager(); |
| virtual const GRState *assume(const GRState *state, DefinedSVal Cond, |
| bool Assumption) = 0; |
| |
| std::pair<const GRState*, const GRState*> assumeDual(const GRState *state, |
| DefinedSVal Cond) { |
| return std::make_pair(assume(state, Cond, true), |
| assume(state, Cond, false)); |
| } |
| |
| virtual const llvm::APSInt* getSymVal(const GRState *state, |
| SymbolRef sym) const = 0; |
| |
| virtual bool isEqual(const GRState *state, SymbolRef sym, |
| const llvm::APSInt& V) const = 0; |
| |
| virtual const GRState *RemoveDeadBindings(const GRState *state, |
| SymbolReaper& SymReaper) = 0; |
| |
| virtual void print(const GRState *state, llvm::raw_ostream& Out, |
| const char* nl, const char *sep) = 0; |
| |
| virtual void EndPath(const GRState *state) {} |
| |
| /// canReasonAbout - Not all ConstraintManagers can accurately reason about |
| /// all SVal values. This method returns true if the ConstraintManager can |
| /// reasonably handle a given SVal value. This is typically queried by |
| /// GRExprEngine to determine if the value should be replaced with a |
| /// conjured symbolic value in order to recover some precision. |
| virtual bool canReasonAbout(SVal X) const = 0; |
| }; |
| |
| ConstraintManager* CreateBasicConstraintManager(GRStateManager& statemgr, |
| GRSubEngine &subengine); |
| ConstraintManager* CreateRangeConstraintManager(GRStateManager& statemgr, |
| GRSubEngine &subengine); |
| |
| } // end clang namespace |
| |
| #endif |