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Merge clang 7.0.1 and several follow-up changes
[FreeBSD/FreeBSD.git] / contrib / llvm / tools / clang / include / clang / StaticAnalyzer / Core / PathSensitive / TaintManager.h
1 //===- TaintManager.h - Managing taint --------------------------*- 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 //  This file provides APIs for adding, removing, querying symbol taint.
11 //
12 //===----------------------------------------------------------------------===//
13
14 #ifndef LLVM_CLANG_STATICANALYZER_CORE_PATHSENSITIVE_TAINTMANAGER_H
15 #define LLVM_CLANG_STATICANALYZER_CORE_PATHSENSITIVE_TAINTMANAGER_H
16
17 #include "clang/StaticAnalyzer/Core/PathSensitive/ProgramState.h"
18 #include "clang/StaticAnalyzer/Core/PathSensitive/ProgramStateTrait.h"
19 #include "clang/StaticAnalyzer/Core/PathSensitive/SymExpr.h"
20 #include "clang/StaticAnalyzer/Core/PathSensitive/TaintTag.h"
21 #include "llvm/ADT/ImmutableMap.h"
22
23 namespace clang {
24 namespace ento {
25
26 /// The GDM component containing the tainted root symbols. We lazily infer the
27 /// taint of the dependent symbols. Currently, this is a map from a symbol to
28 /// tag kind. TODO: Should support multiple tag kinds.
29 // FIXME: This does not use the nice trait macros because it must be accessible
30 // from multiple translation units.
31 struct TaintMap {};
32
33 using TaintMapImpl = llvm::ImmutableMap<SymbolRef, TaintTagType>;
34
35 template<> struct ProgramStateTrait<TaintMap>
36     :  public ProgramStatePartialTrait<TaintMapImpl> {
37   static void *GDMIndex() {
38     static int index = 0;
39     return &index;
40   }
41 };
42
43 /// The GDM component mapping derived symbols' parent symbols to their
44 /// underlying regions. This is used to efficiently check whether a symbol is
45 /// tainted when it represents a sub-region of a tainted symbol.
46 struct DerivedSymTaint {};
47
48 using DerivedSymTaintImpl = llvm::ImmutableMap<SymbolRef, TaintedSubRegions>;
49
50 template<> struct ProgramStateTrait<DerivedSymTaint>
51     :  public ProgramStatePartialTrait<DerivedSymTaintImpl> {
52   static void *GDMIndex() {
53     static int index;
54     return &index;
55   }
56 };
57
58 class TaintManager {
59   TaintManager() = default;
60 };
61
62 } // namespace ento
63 } // namespace clang
64
65 #endif // LLVM_CLANG_STATICANALYZER_CORE_PATHSENSITIVE_TAINTMANAGER_H