1 //===--- SValVisitor.h - Visitor for SVal subclasses ------------*- C++ -*-===//
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
7 //===----------------------------------------------------------------------===//
9 // This file defines the SValVisitor, SymExprVisitor, and MemRegionVisitor
10 // interfaces, and also FullSValVisitor, which visits all three hierarchies.
12 //===----------------------------------------------------------------------===//
14 #ifndef LLVM_CLANG_STATICANALYZER_CORE_PATHSENSITIVE_SVALVISITOR_H
15 #define LLVM_CLANG_STATICANALYZER_CORE_PATHSENSITIVE_SVALVISITOR_H
17 #include "clang/StaticAnalyzer/Core/PathSensitive/SVals.h"
18 #include "clang/StaticAnalyzer/Core/PathSensitive/SymbolManager.h"
19 #include "clang/StaticAnalyzer/Core/PathSensitive/MemRegion.h"
25 /// SValVisitor - this class implements a simple visitor for SVal
27 template <typename ImplClass, typename RetTy = void> class SValVisitor {
30 #define DISPATCH(NAME, CLASS) \
31 return static_cast<ImplClass *>(this)->Visit ## NAME(V.castAs<CLASS>())
34 // Dispatch to VisitFooVal for each FooVal.
35 // Take namespaces (loc:: and nonloc::) into account.
36 switch (V.getBaseKind()) {
37 #define BASIC_SVAL(Id, Parent) case SVal::Id ## Kind: DISPATCH(Id, Id);
38 #include "clang/StaticAnalyzer/Core/PathSensitive/SVals.def"
40 switch (V.getSubKind()) {
41 #define LOC_SVAL(Id, Parent) \
42 case loc::Id ## Kind: DISPATCH(Loc ## Id, loc :: Id);
43 #include "clang/StaticAnalyzer/Core/PathSensitive/SVals.def"
45 llvm_unreachable("Unknown Loc sub-kind!");
46 case SVal::NonLocKind:
47 switch (V.getSubKind()) {
48 #define NONLOC_SVAL(Id, Parent) \
49 case nonloc::Id ## Kind: DISPATCH(NonLoc ## Id, nonloc :: Id);
50 #include "clang/StaticAnalyzer/Core/PathSensitive/SVals.def"
52 llvm_unreachable("Unknown NonLoc sub-kind!");
54 llvm_unreachable("Unknown SVal kind!");
57 #define BASIC_SVAL(Id, Parent) \
58 RetTy Visit ## Id(Id V) { DISPATCH(Parent, Id); }
59 #define ABSTRACT_SVAL(Id, Parent) \
60 BASIC_SVAL(Id, Parent)
61 #define LOC_SVAL(Id, Parent) \
62 RetTy VisitLoc ## Id(loc::Id V) { DISPATCH(Parent, Parent); }
63 #define NONLOC_SVAL(Id, Parent) \
64 RetTy VisitNonLoc ## Id(nonloc::Id V) { DISPATCH(Parent, Parent); }
65 #include "clang/StaticAnalyzer/Core/PathSensitive/SVals.def"
67 // Base case, ignore it. :)
68 RetTy VisitSVal(SVal V) { return RetTy(); }
73 /// SymExprVisitor - this class implements a simple visitor for SymExpr
75 template <typename ImplClass, typename RetTy = void> class SymExprVisitor {
78 #define DISPATCH(CLASS) \
79 return static_cast<ImplClass *>(this)->Visit ## CLASS(cast<CLASS>(S))
81 RetTy Visit(SymbolRef S) {
82 // Dispatch to VisitSymbolFoo for each SymbolFoo.
83 switch (S->getKind()) {
84 #define SYMBOL(Id, Parent) \
85 case SymExpr::Id ## Kind: DISPATCH(Id);
86 #include "clang/StaticAnalyzer/Core/PathSensitive/Symbols.def"
88 llvm_unreachable("Unknown SymExpr kind!");
91 // If the implementation chooses not to implement a certain visit method, fall
92 // back on visiting the superclass.
93 #define SYMBOL(Id, Parent) RetTy Visit ## Id(const Id *S) { DISPATCH(Parent); }
94 #define ABSTRACT_SYMBOL(Id, Parent) SYMBOL(Id, Parent)
95 #include "clang/StaticAnalyzer/Core/PathSensitive/Symbols.def"
97 // Base case, ignore it. :)
98 RetTy VisitSymExpr(SymbolRef S) { return RetTy(); }
103 /// MemRegionVisitor - this class implements a simple visitor for MemRegion
105 template <typename ImplClass, typename RetTy = void> class MemRegionVisitor {
108 #define DISPATCH(CLASS) \
109 return static_cast<ImplClass *>(this)->Visit ## CLASS(cast<CLASS>(R))
111 RetTy Visit(const MemRegion *R) {
112 // Dispatch to VisitFooRegion for each FooRegion.
113 switch (R->getKind()) {
114 #define REGION(Id, Parent) case MemRegion::Id ## Kind: DISPATCH(Id);
115 #include "clang/StaticAnalyzer/Core/PathSensitive/Regions.def"
117 llvm_unreachable("Unknown MemRegion kind!");
120 // If the implementation chooses not to implement a certain visit method, fall
121 // back on visiting the superclass.
122 #define REGION(Id, Parent) \
123 RetTy Visit ## Id(const Id *R) { DISPATCH(Parent); }
124 #define ABSTRACT_REGION(Id, Parent) \
126 #include "clang/StaticAnalyzer/Core/PathSensitive/Regions.def"
128 // Base case, ignore it. :)
129 RetTy VisitMemRegion(const MemRegion *R) { return RetTy(); }
134 /// FullSValVisitor - a convenient mixed visitor for all three:
135 /// SVal, SymExpr and MemRegion subclasses.
136 template <typename ImplClass, typename RetTy = void>
137 class FullSValVisitor : public SValVisitor<ImplClass, RetTy>,
138 public SymExprVisitor<ImplClass, RetTy>,
139 public MemRegionVisitor<ImplClass, RetTy> {
141 using SValVisitor<ImplClass, RetTy>::Visit;
142 using SymExprVisitor<ImplClass, RetTy>::Visit;
143 using MemRegionVisitor<ImplClass, RetTy>::Visit;
146 } // end namespace ento
148 } // end namespace clang