contrib/llvm/tools/clang/lib/StaticAnalyzer/Core/SimpleConstraintManager.h

   1 //== SimpleConstraintManager.h ----------------------------------*- 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 //  Code shared between BasicConstraintManager and RangeConstraintManager.
  11 //
  12 //===----------------------------------------------------------------------===//
  13
  14 #ifndef LLVM_CLANG_LIB_STATICANALYZER_CORE_SIMPLECONSTRAINTMANAGER_H
  15 #define LLVM_CLANG_LIB_STATICANALYZER_CORE_SIMPLECONSTRAINTMANAGER_H
  16
  17 #include "clang/StaticAnalyzer/Core/PathSensitive/ConstraintManager.h"
  18 #include "clang/StaticAnalyzer/Core/PathSensitive/ProgramState.h"
  19
  20 namespace clang {
  21
  22 namespace ento {
  23
  24 class SimpleConstraintManager : public ConstraintManager {
  25   SubEngine *SU;
  26   SValBuilder &SVB;
  27 public:
  28   SimpleConstraintManager(SubEngine *subengine, SValBuilder &SB)
  29     : SU(subengine), SVB(SB) {}
  30   ~SimpleConstraintManager() override;
  31
  32   //===------------------------------------------------------------------===//
  33   // Common implementation for the interface provided by ConstraintManager.
  34   //===------------------------------------------------------------------===//
  35
  36   ProgramStateRef assume(ProgramStateRef state, DefinedSVal Cond,
  37                         bool Assumption) override;
  38
  39   ProgramStateRef assume(ProgramStateRef state, NonLoc Cond, bool Assumption);
  40
  41   ProgramStateRef assumeWithinInclusiveRange(ProgramStateRef State,
  42                                              NonLoc Value,
  43                                              const llvm::APSInt &From,
  44                                              const llvm::APSInt &To,
  45                                              bool InRange) override;
  46
  47   ProgramStateRef assumeSymRel(ProgramStateRef state,
  48                               const SymExpr *LHS,
  49                               BinaryOperator::Opcode op,
  50                               const llvm::APSInt& Int);
  51
  52   ProgramStateRef assumeSymWithinInclusiveRange(ProgramStateRef State,
  53                                                 SymbolRef Sym,
  54                                                 const llvm::APSInt &From,
  55                                                 const llvm::APSInt &To,
  56                                                 bool InRange);
  57
  58
  59 protected:
  60
  61   //===------------------------------------------------------------------===//
  62   // Interface that subclasses must implement.
  63   //===------------------------------------------------------------------===//
  64
  65   // Each of these is of the form "$sym+Adj <> V", where "<>" is the comparison
  66   // operation for the method being invoked.
  67   virtual ProgramStateRef assumeSymNE(ProgramStateRef state, SymbolRef sym,
  68                                      const llvm::APSInt& V,
  69                                      const llvm::APSInt& Adjustment) = 0;
  70
  71   virtual ProgramStateRef assumeSymEQ(ProgramStateRef state, SymbolRef sym,
  72                                      const llvm::APSInt& V,
  73                                      const llvm::APSInt& Adjustment) = 0;
  74
  75   virtual ProgramStateRef assumeSymLT(ProgramStateRef state, SymbolRef sym,
  76                                      const llvm::APSInt& V,
  77                                      const llvm::APSInt& Adjustment) = 0;
  78
  79   virtual ProgramStateRef assumeSymGT(ProgramStateRef state, SymbolRef sym,
  80                                      const llvm::APSInt& V,
  81                                      const llvm::APSInt& Adjustment) = 0;
  82
  83   virtual ProgramStateRef assumeSymLE(ProgramStateRef state, SymbolRef sym,
  84                                      const llvm::APSInt& V,
  85                                      const llvm::APSInt& Adjustment) = 0;
  86
  87   virtual ProgramStateRef assumeSymGE(ProgramStateRef state, SymbolRef sym,
  88                                      const llvm::APSInt& V,
  89                                      const llvm::APSInt& Adjustment) = 0;
  90
  91
  92   virtual ProgramStateRef assumeSymbolWithinInclusiveRange(
  93       ProgramStateRef State, SymbolRef Sym, const llvm::APSInt &From,
  94       const llvm::APSInt &To, const llvm::APSInt &Adjustment) = 0;
  95
  96   virtual ProgramStateRef assumeSymbolOutOfInclusiveRange(
  97       ProgramStateRef state, SymbolRef Sym, const llvm::APSInt &From,
  98       const llvm::APSInt &To, const llvm::APSInt &Adjustment) = 0;
  99   //===------------------------------------------------------------------===//
 100   // Internal implementation.
 101   //===------------------------------------------------------------------===//
 102
 103   BasicValueFactory &getBasicVals() const { return SVB.getBasicValueFactory(); }
 104   SymbolManager &getSymbolManager() const { return SVB.getSymbolManager(); }
 105
 106   bool canReasonAbout(SVal X) const override;
 107
 108   ProgramStateRef assumeAux(ProgramStateRef state,
 109                                 NonLoc Cond,
 110                                 bool Assumption);
 111
 112   ProgramStateRef assumeAuxForSymbol(ProgramStateRef State,
 113                                          SymbolRef Sym,
 114                                          bool Assumption);
 115 };
 116
 117 } // end GR namespace
 118
 119 } // end clang namespace
 120
 121 #endif