1 //== ConstraintManager.h - Constraints on symbolic values.-------*- C++ -*--==// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is distributed under the University of Illinois Open Source 6 // License. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 // 10 // This file defined the interface to manage constraints on symbolic values. 11 // 12 //===----------------------------------------------------------------------===// 13 14 #ifndef LLVM_CLANG_GR_CONSTRAINT_MANAGER_H 15 #define LLVM_CLANG_GR_CONSTRAINT_MANAGER_H 16 17 #include "clang/StaticAnalyzer/Core/PathSensitive/SymbolManager.h" 18 #include "clang/StaticAnalyzer/Core/PathSensitive/SVals.h" 19 20 namespace llvm { 21 class APSInt; 22 } 23 24 namespace clang { 25 26 namespace ento { 27 28 class ProgramState; 29 class ProgramStateManager; 30 class SubEngine; 31 32 class ConstraintManager { 33 public: 34 virtual ~ConstraintManager(); 35 virtual const ProgramState *assume(const ProgramState *state, 36 DefinedSVal Cond, 37 bool Assumption) = 0; 38 39 std::pair<const ProgramState*, const ProgramState*> 40 assumeDual(const ProgramState *state, DefinedSVal Cond) 41 { 42 return std::make_pair(assume(state, Cond, true), 43 assume(state, Cond, false)); 44 } 45 46 virtual const llvm::APSInt* getSymVal(const ProgramState *state, 47 SymbolRef sym) const = 0; 48 49 virtual bool isEqual(const ProgramState *state, 50 SymbolRef sym, 51 const llvm::APSInt& V) const = 0; 52 53 virtual const ProgramState *removeDeadBindings(const ProgramState *state, 54 SymbolReaper& SymReaper) = 0; 55 56 virtual void print(const ProgramState *state, 57 raw_ostream &Out, 58 const char* nl, 59 const char *sep) = 0; 60 61 virtual void EndPath(const ProgramState *state) {} 62 63 /// canReasonAbout - Not all ConstraintManagers can accurately reason about 64 /// all SVal values. This method returns true if the ConstraintManager can 65 /// reasonably handle a given SVal value. This is typically queried by 66 /// ExprEngine to determine if the value should be replaced with a 67 /// conjured symbolic value in order to recover some precision. 68 virtual bool canReasonAbout(SVal X) const = 0; 69 }; 70 71 ConstraintManager* CreateBasicConstraintManager(ProgramStateManager& statemgr, 72 SubEngine &subengine); 73 ConstraintManager* CreateRangeConstraintManager(ProgramStateManager& statemgr, 74 SubEngine &subengine); 75 76 } // end GR namespace 77 78 } // end clang namespace 79 80 #endif 81
