1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
|
//== Environment.h - Map from Stmt* to Locations/Values ---------*- C++ -*--==//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file defined the Environment and EnvironmentManager classes.
//
//===----------------------------------------------------------------------===//
#ifndef LLVM_CLANG_GR_ENVIRONMENT_H
#define LLVM_CLANG_GR_ENVIRONMENT_H
#include "clang/StaticAnalyzer/Core/PathSensitive/SVals.h"
#include "llvm/ADT/ImmutableMap.h"
namespace clang {
class LiveVariables;
namespace ento {
class EnvironmentManager;
class SValBuilder;
/// Environment - An immutable map from Stmts to their current
/// symbolic values (SVals).
///
class Environment {
private:
friend class EnvironmentManager;
// Type definitions.
typedef llvm::ImmutableMap<const Stmt*,SVal> BindingsTy;
// Data.
BindingsTy ExprBindings;
Environment(BindingsTy eb)
: ExprBindings(eb) {}
SVal lookupExpr(const Stmt *E) const;
public:
typedef BindingsTy::iterator iterator;
iterator begin() const { return ExprBindings.begin(); }
iterator end() const { return ExprBindings.end(); }
/// getSVal - Fetches the current binding of the expression in the
/// Environment.
SVal getSVal(const Stmt *Ex, SValBuilder& svalBuilder,
bool useOnlyDirectBindings = false) const;
/// Profile - Profile the contents of an Environment object for use
/// in a FoldingSet.
static void Profile(llvm::FoldingSetNodeID& ID, const Environment* env) {
env->ExprBindings.Profile(ID);
}
/// Profile - Used to profile the contents of this object for inclusion
/// in a FoldingSet.
void Profile(llvm::FoldingSetNodeID& ID) const {
Profile(ID, this);
}
bool operator==(const Environment& RHS) const {
return ExprBindings == RHS.ExprBindings;
}
};
class EnvironmentManager {
private:
typedef Environment::BindingsTy::Factory FactoryTy;
FactoryTy F;
public:
EnvironmentManager(llvm::BumpPtrAllocator& Allocator) : F(Allocator) {}
~EnvironmentManager() {}
Environment getInitialEnvironment() {
return Environment(F.getEmptyMap());
}
/// Bind the value 'V' to the statement 'S'.
Environment bindExpr(Environment Env, const Stmt *S, SVal V,
bool Invalidate);
/// Bind the location 'location' and value 'V' to the statement 'S'. This
/// is used when simulating loads/stores.
Environment bindExprAndLocation(Environment Env, const Stmt *S, SVal location,
SVal V);
Environment removeDeadBindings(Environment Env,
SymbolReaper &SymReaper, const ProgramState *ST);
};
} // end GR namespace
} // end clang namespace
#endif
|
