| //===--- SValVisitor.h - Visitor for SVal subclasses ------------*- 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 |
| // |
| //===----------------------------------------------------------------------===// |
| // |
| // This file defines the SValVisitor, SymExprVisitor, and MemRegionVisitor |
| // interfaces, and also FullSValVisitor, which visits all three hierarchies. |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #ifndef LLVM_CLANG_STATICANALYZER_CORE_PATHSENSITIVE_SVALVISITOR_H |
| #define LLVM_CLANG_STATICANALYZER_CORE_PATHSENSITIVE_SVALVISITOR_H |
| |
| #include "clang/StaticAnalyzer/Core/PathSensitive/MemRegion.h" |
| #include "clang/StaticAnalyzer/Core/PathSensitive/SVals.h" |
| #include "clang/StaticAnalyzer/Core/PathSensitive/SymbolManager.h" |
| |
| namespace clang { |
| |
| namespace ento { |
| |
| /// SValVisitor - this class implements a simple visitor for SVal |
| /// subclasses. |
| template <typename ImplClass, typename RetTy = void> class SValVisitor { |
| ImplClass &derived() { return *static_cast<ImplClass *>(this); } |
| |
| public: |
| RetTy Visit(SVal V) { |
| // Dispatch to VisitFooVal for each FooVal. |
| switch (V.getKind()) { |
| #define BASIC_SVAL(Id, Parent) \ |
| case SVal::Id##Kind: \ |
| return derived().Visit##Id(V.castAs<Id>()); |
| #define LOC_SVAL(Id, Parent) \ |
| case SVal::Loc##Id##Kind: \ |
| return derived().Visit##Id(V.castAs<loc::Id>()); |
| #define NONLOC_SVAL(Id, Parent) \ |
| case SVal::NonLoc##Id##Kind: \ |
| return derived().Visit##Id(V.castAs<nonloc::Id>()); |
| #include "clang/StaticAnalyzer/Core/PathSensitive/SVals.def" |
| } |
| llvm_unreachable("Unknown SVal kind!"); |
| } |
| |
| // Dispatch to the more generic handler as a default implementation. |
| #define BASIC_SVAL(Id, Parent) \ |
| RetTy Visit##Id(Id V) { return derived().Visit##Parent(V.castAs<Id>()); } |
| #define ABSTRACT_SVAL(Id, Parent) BASIC_SVAL(Id, Parent) |
| #define LOC_SVAL(Id, Parent) \ |
| RetTy Visit##Id(loc::Id V) { return derived().VisitLoc(V.castAs<Loc>()); } |
| #define NONLOC_SVAL(Id, Parent) \ |
| RetTy Visit##Id(nonloc::Id V) { \ |
| return derived().VisitNonLoc(V.castAs<NonLoc>()); \ |
| } |
| #include "clang/StaticAnalyzer/Core/PathSensitive/SVals.def" |
| |
| // Base case, ignore it. :) |
| RetTy VisitSVal(SVal V) { return RetTy(); } |
| }; |
| |
| /// SymExprVisitor - this class implements a simple visitor for SymExpr |
| /// subclasses. |
| template <typename ImplClass, typename RetTy = void> class SymExprVisitor { |
| public: |
| |
| #define DISPATCH(CLASS) \ |
| return static_cast<ImplClass *>(this)->Visit ## CLASS(cast<CLASS>(S)) |
| |
| RetTy Visit(SymbolRef S) { |
| // Dispatch to VisitSymbolFoo for each SymbolFoo. |
| switch (S->getKind()) { |
| #define SYMBOL(Id, Parent) \ |
| case SymExpr::Id ## Kind: DISPATCH(Id); |
| #include "clang/StaticAnalyzer/Core/PathSensitive/Symbols.def" |
| } |
| llvm_unreachable("Unknown SymExpr kind!"); |
| } |
| |
| // If the implementation chooses not to implement a certain visit method, fall |
| // back on visiting the superclass. |
| #define SYMBOL(Id, Parent) RetTy Visit ## Id(const Id *S) { DISPATCH(Parent); } |
| #define ABSTRACT_SYMBOL(Id, Parent) SYMBOL(Id, Parent) |
| #include "clang/StaticAnalyzer/Core/PathSensitive/Symbols.def" |
| |
| // Base case, ignore it. :) |
| RetTy VisitSymExpr(SymbolRef S) { return RetTy(); } |
| |
| #undef DISPATCH |
| }; |
| |
| /// MemRegionVisitor - this class implements a simple visitor for MemRegion |
| /// subclasses. |
| template <typename ImplClass, typename RetTy = void> class MemRegionVisitor { |
| public: |
| |
| #define DISPATCH(CLASS) \ |
| return static_cast<ImplClass *>(this)->Visit ## CLASS(cast<CLASS>(R)) |
| |
| RetTy Visit(const MemRegion *R) { |
| // Dispatch to VisitFooRegion for each FooRegion. |
| switch (R->getKind()) { |
| #define REGION(Id, Parent) case MemRegion::Id ## Kind: DISPATCH(Id); |
| #include "clang/StaticAnalyzer/Core/PathSensitive/Regions.def" |
| } |
| llvm_unreachable("Unknown MemRegion kind!"); |
| } |
| |
| // If the implementation chooses not to implement a certain visit method, fall |
| // back on visiting the superclass. |
| #define REGION(Id, Parent) \ |
| RetTy Visit ## Id(const Id *R) { DISPATCH(Parent); } |
| #define ABSTRACT_REGION(Id, Parent) \ |
| REGION(Id, Parent) |
| #include "clang/StaticAnalyzer/Core/PathSensitive/Regions.def" |
| |
| // Base case, ignore it. :) |
| RetTy VisitMemRegion(const MemRegion *R) { return RetTy(); } |
| |
| #undef DISPATCH |
| }; |
| |
| /// FullSValVisitor - a convenient mixed visitor for all three: |
| /// SVal, SymExpr and MemRegion subclasses. |
| template <typename ImplClass, typename RetTy = void> |
| class FullSValVisitor : public SValVisitor<ImplClass, RetTy>, |
| public SymExprVisitor<ImplClass, RetTy>, |
| public MemRegionVisitor<ImplClass, RetTy> { |
| public: |
| using SValVisitor<ImplClass, RetTy>::Visit; |
| using SymExprVisitor<ImplClass, RetTy>::Visit; |
| using MemRegionVisitor<ImplClass, RetTy>::Visit; |
| }; |
| |
| } // end namespace ento |
| |
| } // end namespace clang |
| |
| #endif |