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| //== SimpleConstraintManager.h ----------------------------------*- C++ -*--==//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// Simplified constraint manager backend.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_CLANG_STATICANALYZER_CORE_PATHSENSITIVE_SIMPLECONSTRAINTMANAGER_H
#define LLVM_CLANG_STATICANALYZER_CORE_PATHSENSITIVE_SIMPLECONSTRAINTMANAGER_H
#include "clang/StaticAnalyzer/Core/PathSensitive/ConstraintManager.h"
#include "clang/StaticAnalyzer/Core/PathSensitive/ProgramState.h"
namespace clang {
namespace ento {
class SimpleConstraintManager : public ConstraintManager {
SubEngine *SU;
SValBuilder &SVB;
public:
SimpleConstraintManager(SubEngine *subengine, SValBuilder &SB)
: SU(subengine), SVB(SB) {}
~SimpleConstraintManager() override;
//===------------------------------------------------------------------===//
// Implementation for interface from ConstraintManager.
//===------------------------------------------------------------------===//
/// Ensures that the DefinedSVal conditional is expressed as a NonLoc by
/// creating boolean casts to handle Loc's.
ProgramStateRef assume(ProgramStateRef State, DefinedSVal Cond,
bool Assumption) override;
ProgramStateRef assumeInclusiveRange(ProgramStateRef State, NonLoc Value,
const llvm::APSInt &From,
const llvm::APSInt &To,
bool InRange) override;
protected:
//===------------------------------------------------------------------===//
// Interface that subclasses must implement.
//===------------------------------------------------------------------===//
/// Given a symbolic expression that can be reasoned about, assume that it is
/// true/false and generate the new program state.
virtual ProgramStateRef assumeSym(ProgramStateRef State, SymbolRef Sym,
bool Assumption) = 0;
/// Given a symbolic expression within the range [From, To], assume that it is
/// true/false and generate the new program state.
/// This function is used to handle case ranges produced by a language
/// extension for switch case statements.
virtual ProgramStateRef assumeSymInclusiveRange(ProgramStateRef State,
SymbolRef Sym,
const llvm::APSInt &From,
const llvm::APSInt &To,
bool InRange) = 0;
/// Given a symbolic expression that cannot be reasoned about, assume that
/// it is zero/nonzero and add it directly to the solver state.
virtual ProgramStateRef assumeSymUnsupported(ProgramStateRef State,
SymbolRef Sym,
bool Assumption) = 0;
//===------------------------------------------------------------------===//
// Internal implementation.
//===------------------------------------------------------------------===//
SValBuilder &getSValBuilder() const { return SVB; }
BasicValueFactory &getBasicVals() const { return SVB.getBasicValueFactory(); }
SymbolManager &getSymbolManager() const { return SVB.getSymbolManager(); }
private:
ProgramStateRef assume(ProgramStateRef State, NonLoc Cond, bool Assumption);
ProgramStateRef assumeAux(ProgramStateRef State, NonLoc Cond,
bool Assumption);
};
} // end namespace ento
} // end namespace clang
#endif
|