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
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
|
//== MemRegion.cpp - Abstract memory regions for static analysis --*- C++ -*--//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
//
// This file defines MemRegion and its subclasses. MemRegion defines a
// partially-typed abstraction of memory useful for path-sensitive dataflow
// analyses.
//
//===----------------------------------------------------------------------===//
#include "llvm/Support/raw_ostream.h"
#include "clang/Analysis/PathSensitive/MemRegion.h"
using namespace clang;
MemRegion::~MemRegion() {}
void MemSpaceRegion::Profile(llvm::FoldingSetNodeID& ID) const {
ID.AddInteger((unsigned)getKind());
}
void AnonTypedRegion::ProfileRegion(llvm::FoldingSetNodeID& ID, QualType T,
const MemRegion* superRegion) {
ID.AddInteger((unsigned) AnonTypedRegionKind);
ID.Add(T);
ID.AddPointer(superRegion);
}
void AnonPointeeRegion::ProfileRegion(llvm::FoldingSetNodeID& ID,
const VarDecl* VD, QualType T,
const MemRegion* superRegion) {
ID.AddInteger((unsigned) AnonPointeeRegionKind);
ID.Add(T);
ID.AddPointer(VD);
ID.AddPointer(superRegion);
}
void AnonTypedRegion::Profile(llvm::FoldingSetNodeID& ID) const {
AnonTypedRegion::ProfileRegion(ID, T, superRegion);
}
void DeclRegion::ProfileRegion(llvm::FoldingSetNodeID& ID, const Decl* D,
const MemRegion* superRegion, Kind k) {
ID.AddInteger((unsigned) k);
ID.AddPointer(D);
ID.AddPointer(superRegion);
}
void DeclRegion::Profile(llvm::FoldingSetNodeID& ID) const {
DeclRegion::ProfileRegion(ID, D, superRegion, getKind());
}
//===----------------------------------------------------------------------===//
// Region pretty-printing.
//===----------------------------------------------------------------------===//
std::string MemRegion::getString() const {
std::string s;
llvm::raw_string_ostream os(s);
print(os);
return os.str();
}
void MemRegion::print(llvm::raw_ostream& os) const {
os << "<Unknown Region>";
}
void VarRegion::print(llvm::raw_ostream& os) const {
os << cast<VarDecl>(D)->getName();
}
//===----------------------------------------------------------------------===//
// MemRegionManager methods.
//===----------------------------------------------------------------------===//
MemSpaceRegion* MemRegionManager::LazyAllocate(MemSpaceRegion*& region) {
if (!region) {
region = (MemSpaceRegion*) A.Allocate<MemSpaceRegion>();
new (region) MemSpaceRegion();
}
return region;
}
MemSpaceRegion* MemRegionManager::getStackRegion() {
return LazyAllocate(stack);
}
MemSpaceRegion* MemRegionManager::getGlobalsRegion() {
return LazyAllocate(globals);
}
MemSpaceRegion* MemRegionManager::getHeapRegion() {
return LazyAllocate(heap);
}
MemSpaceRegion* MemRegionManager::getUnknownRegion() {
return LazyAllocate(unknown);
}
VarRegion* MemRegionManager::getVarRegion(const VarDecl* d,
MemRegion* superRegion) {
llvm::FoldingSetNodeID ID;
DeclRegion::ProfileRegion(ID, d, superRegion, MemRegion::VarRegionKind);
void* InsertPos;
MemRegion* data = Regions.FindNodeOrInsertPos(ID, InsertPos);
VarRegion* R = cast_or_null<VarRegion>(data);
if (!R) {
R = (VarRegion*) A.Allocate<VarRegion>();
new (R) VarRegion(d, superRegion);
Regions.InsertNode(R, InsertPos);
}
return R;
}
FieldRegion* MemRegionManager::getFieldRegion(const FieldDecl* d,
MemRegion* superRegion) {
llvm::FoldingSetNodeID ID;
DeclRegion::ProfileRegion(ID, d, superRegion, MemRegion::FieldRegionKind);
void* InsertPos;
MemRegion* data = Regions.FindNodeOrInsertPos(ID, InsertPos);
FieldRegion* R = cast_or_null<FieldRegion>(data);
if (!R) {
R = (FieldRegion*) A.Allocate<FieldRegion>();
new (R) FieldRegion(d, superRegion);
Regions.InsertNode(R, InsertPos);
}
return R;
}
ObjCIvarRegion* MemRegionManager::getObjCIvarRegion(const ObjCIvarDecl* d,
MemRegion* superRegion) {
llvm::FoldingSetNodeID ID;
DeclRegion::ProfileRegion(ID, d, superRegion, MemRegion::ObjCIvarRegionKind);
void* InsertPos;
MemRegion* data = Regions.FindNodeOrInsertPos(ID, InsertPos);
ObjCIvarRegion* R = cast_or_null<ObjCIvarRegion>(data);
if (!R) {
R = (ObjCIvarRegion*) A.Allocate<ObjCIvarRegion>();
new (R) ObjCIvarRegion(d, superRegion);
Regions.InsertNode(R, InsertPos);
}
return R;
}
AnonPointeeRegion* MemRegionManager::getAnonPointeeRegion(const VarDecl* d) {
llvm::FoldingSetNodeID ID;
QualType T = d->getType();
QualType PointeeType = cast<PointerType>(T.getTypePtr())->getPointeeType();
MemRegion* superRegion = getUnknownRegion();
AnonPointeeRegion::ProfileRegion(ID, d, PointeeType, superRegion);
void* InsertPos;
MemRegion* data = Regions.FindNodeOrInsertPos(ID, InsertPos);
AnonPointeeRegion* R = cast_or_null<AnonPointeeRegion>(data);
if (!R) {
R = (AnonPointeeRegion*) A.Allocate<AnonPointeeRegion>();
new (R) AnonPointeeRegion(d, PointeeType, superRegion);
Regions.InsertNode(R, InsertPos);
}
return R;
}
bool MemRegionManager::hasStackStorage(const MemRegion* R) {
MemSpaceRegion* S = getStackRegion();
while (R) {
if (R == S) return true;
R = R->getSuperRegion();
}
return false;
}
|
