1 //== SimpleConstraintManager.h ----------------------------------*- C++ -*--==// 2 // 3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 4 // See https://llvm.org/LICENSE.txt for license information. 5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 6 // 7 //===----------------------------------------------------------------------===// 8 // 9 // Simplified constraint manager backend. 10 // 11 //===----------------------------------------------------------------------===// 12 13 #ifndef LLVM_CLANG_STATICANALYZER_CORE_PATHSENSITIVE_SIMPLECONSTRAINTMANAGER_H 14 #define LLVM_CLANG_STATICANALYZER_CORE_PATHSENSITIVE_SIMPLECONSTRAINTMANAGER_H 15 16 #include "clang/StaticAnalyzer/Core/PathSensitive/ConstraintManager.h" 17 #include "clang/StaticAnalyzer/Core/PathSensitive/ProgramState.h" 18 19 namespace clang { 20 21 namespace ento { 22 23 class SimpleConstraintManager : public ConstraintManager { 24 ExprEngine *EE; 25 SValBuilder &SVB; 26 27 public: SimpleConstraintManager(ExprEngine * exprengine,SValBuilder & SB)28 SimpleConstraintManager(ExprEngine *exprengine, SValBuilder &SB) 29 : EE(exprengine), SVB(SB) {} 30 31 ~SimpleConstraintManager() override; 32 33 //===------------------------------------------------------------------===// 34 // Implementation for interface from ConstraintManager. 35 //===------------------------------------------------------------------===// 36 37 protected: 38 //===------------------------------------------------------------------===// 39 // Interface that subclasses must implement. 40 //===------------------------------------------------------------------===// 41 42 /// Given a symbolic expression that can be reasoned about, assume that it is 43 /// true/false and generate the new program state. 44 virtual ProgramStateRef assumeSym(ProgramStateRef State, SymbolRef Sym, 45 bool Assumption) = 0; 46 47 /// Given a symbolic expression within the range [From, To], assume that it is 48 /// true/false and generate the new program state. 49 /// This function is used to handle case ranges produced by a language 50 /// extension for switch case statements. 51 virtual ProgramStateRef assumeSymInclusiveRange(ProgramStateRef State, 52 SymbolRef Sym, 53 const llvm::APSInt &From, 54 const llvm::APSInt &To, 55 bool InRange) = 0; 56 57 /// Given a symbolic expression that cannot be reasoned about, assume that 58 /// it is zero/nonzero and add it directly to the solver state. 59 virtual ProgramStateRef assumeSymUnsupported(ProgramStateRef State, 60 SymbolRef Sym, 61 bool Assumption) = 0; 62 63 //===------------------------------------------------------------------===// 64 // Internal implementation. 65 //===------------------------------------------------------------------===// 66 67 /// Ensures that the DefinedSVal conditional is expressed as a NonLoc by 68 /// creating boolean casts to handle Loc's. 69 ProgramStateRef assumeInternal(ProgramStateRef State, DefinedSVal Cond, 70 bool Assumption) override; 71 72 ProgramStateRef assumeInclusiveRangeInternal(ProgramStateRef State, 73 NonLoc Value, 74 const llvm::APSInt &From, 75 const llvm::APSInt &To, 76 bool InRange) override; 77 getSValBuilder()78 SValBuilder &getSValBuilder() const { return SVB; } getBasicVals()79 BasicValueFactory &getBasicVals() const { return SVB.getBasicValueFactory(); } getSymbolManager()80 SymbolManager &getSymbolManager() const { return SVB.getSymbolManager(); } 81 82 private: 83 ProgramStateRef assume(ProgramStateRef State, NonLoc Cond, bool Assumption); 84 85 ProgramStateRef assumeAux(ProgramStateRef State, NonLoc Cond, 86 bool Assumption); 87 }; 88 89 } // end namespace ento 90 91 } // end namespace clang 92 93 #endif 94