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 SubEngine *SU; 25 SValBuilder &SVB; 26 27 public: 28 SimpleConstraintManager(SubEngine *subengine, SValBuilder &SB) 29 : SU(subengine), SVB(SB) {} 30 31 ~SimpleConstraintManager() override; 32 33 //===------------------------------------------------------------------===// 34 // Implementation for interface from ConstraintManager. 35 //===------------------------------------------------------------------===// 36 37 /// Ensures that the DefinedSVal conditional is expressed as a NonLoc by 38 /// creating boolean casts to handle Loc's. 39 ProgramStateRef assume(ProgramStateRef State, DefinedSVal Cond, 40 bool Assumption) override; 41 42 ProgramStateRef assumeInclusiveRange(ProgramStateRef State, NonLoc Value, 43 const llvm::APSInt &From, 44 const llvm::APSInt &To, 45 bool InRange) override; 46 47 protected: 48 //===------------------------------------------------------------------===// 49 // Interface that subclasses must implement. 50 //===------------------------------------------------------------------===// 51 52 /// Given a symbolic expression that can be reasoned about, assume that it is 53 /// true/false and generate the new program state. 54 virtual ProgramStateRef assumeSym(ProgramStateRef State, SymbolRef Sym, 55 bool Assumption) = 0; 56 57 /// Given a symbolic expression within the range [From, To], assume that it is 58 /// true/false and generate the new program state. 59 /// This function is used to handle case ranges produced by a language 60 /// extension for switch case statements. 61 virtual ProgramStateRef assumeSymInclusiveRange(ProgramStateRef State, 62 SymbolRef Sym, 63 const llvm::APSInt &From, 64 const llvm::APSInt &To, 65 bool InRange) = 0; 66 67 /// Given a symbolic expression that cannot be reasoned about, assume that 68 /// it is zero/nonzero and add it directly to the solver state. 69 virtual ProgramStateRef assumeSymUnsupported(ProgramStateRef State, 70 SymbolRef Sym, 71 bool Assumption) = 0; 72 73 //===------------------------------------------------------------------===// 74 // Internal implementation. 75 //===------------------------------------------------------------------===// 76 77 SValBuilder &getSValBuilder() const { return SVB; } 78 BasicValueFactory &getBasicVals() const { return SVB.getBasicValueFactory(); } 79 SymbolManager &getSymbolManager() const { return SVB.getSymbolManager(); } 80 81 private: 82 ProgramStateRef assume(ProgramStateRef State, NonLoc Cond, bool Assumption); 83 84 ProgramStateRef assumeAux(ProgramStateRef State, NonLoc Cond, 85 bool Assumption); 86 }; 87 88 } // end namespace ento 89 90 } // end namespace clang 91 92 #endif 93