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
| // RUN: %clang_analyze_cc1 -std=c++11 -analyzer-checker=core -analyzer-output=plist-multi-file -o %t.plist -verify -analyzer-config eagerly-assume=false %s
// RUN: %normalize_plist <%t.plist | diff -ub %S/Inputs/expected-plists/cxx-for-range.cpp.plist -
extern void work();
void testLoop() {
int z[] = {1,2};
for (int y : z) {
work();
work();
if (y == 2)
*(volatile int *)0 = 1; // expected-warning {{Dereference of null pointer}}
work();
work();
(void)y;
}
*(volatile int *)0 = 1; // no-warning
}
class MagicVector {
public:
MagicVector();
using iterator = int *;
iterator begin() const;
iterator end() const;
};
MagicVector get(bool fail = false) {
if (fail)
*(volatile int *)0 = 1; // expected-warning {{Dereference of null pointer}}
return MagicVector{};
}
void testLoopOpaqueCollection() {
for (int y : get()) {
work();
work();
if (y == 2)
*(volatile int *)0 = 1; // expected-warning {{Dereference of null pointer}}
work();
work();
(void)y;
}
*(volatile int *)0 = 1; // expected-warning {{Dereference of null pointer}}
}
class MagicVector2 {
public:
MagicVector2();
class iterator {
public:
int operator*() const;
iterator &operator++();
bool operator==(const iterator &);
bool operator!=(const iterator &);
};
iterator begin() const;
iterator end() const;
};
MagicVector2 get2() {
return MagicVector2{};
}
void testLoopOpaqueIterator() {
for (int y : get2()) {
work();
work();
if (y == 2)
*(volatile int *)0 = 1; // expected-warning {{Dereference of null pointer}}
work();
work();
(void)y;
}
*(volatile int *)0 = 1; // expected-warning {{Dereference of null pointer}}
}
void testLoopErrorInRange() {
for (int y : get(true)) { // error inside get()
work();
work();
if (y == 2)
*(volatile int *)0 = 1; // no-warning
work();
work();
(void)y;
}
*(volatile int *)0 = 1; // no-warning
}
void testForRangeInit() {
for (int *arr[3] = {nullptr, nullptr, nullptr}; int *p : arr) // expected-warning {{extension}}
*p = 1; // expected-warning {{Dereference of null pointer}}
}
|