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
|
// RUN: %clang_analyze_cc1 -analyzer-checker=core \
// RUN: -analyzer-output=text \
// RUN: -verify %s
namespace test_tracking_of_lhs_multiplier {
int f(int x, int y) {
bool p0 = x < 0; // expected-note {{Assuming 'x' is >= 0}} \
// expected-note {{'p0' initialized to 0}}
int div = p0 * y; // expected-note {{'div' initialized to 0}}
return 1 / div; // expected-note {{Division by zero}} \
// expected-warning {{Division by zero}}
}
} // namespace test_tracking_of_lhs_multiplier
namespace test_tracking_of_rhs_multiplier {
int f(int x, int y) {
bool p0 = x < 0; // expected-note {{Assuming 'x' is >= 0}} \
// expected-note {{'p0' initialized to 0}}
int div = y * p0; // expected-note {{'div' initialized to 0}}
return 1 / div; // expected-note {{Division by zero}} \
// expected-warning {{Division by zero}}
}
} // namespace test_tracking_of_rhs_multiplier
namespace test_tracking_of_nested_multiplier {
int f(int x, int y, int z) {
bool p0 = x < 0; // expected-note {{Assuming 'x' is >= 0}} \
// expected-note {{'p0' initialized to 0}}
int div = y*z*p0; // expected-note {{'div' initialized to 0}}
return 1 / div; // expected-note {{Division by zero}} \
// expected-warning {{Division by zero}}
}
} // namespace test_tracking_of_nested_multiplier
namespace test_tracking_through_multiple_stmts {
int f(int x, int y) {
bool p0 = x < 0; // expected-note {{Assuming 'x' is >= 0}}
bool p1 = p0 ? 0 : 1; // expected-note {{'p0' is false}} \
// expected-note {{'?' condition is false}}
bool p2 = 1 - p1; // expected-note {{'p2' initialized to 0}}
int div = p2 * y; // expected-note {{'div' initialized to 0}}
return 1 / div; // expected-note {{Division by zero}} \
// expected-warning {{Division by zero}}
}
} // namespace test_tracking_through_multiple_stmts
namespace test_tracking_both_lhs_and_rhs {
int f(int x, int y) {
bool p0 = x < 0; // expected-note {{Assuming 'x' is >= 0}} \
// expected-note {{'p0' initialized to 0}}
bool p1 = y < 0; // expected-note {{Assuming 'y' is >= 0}} \
// expected-note {{'p1' initialized to 0}}
int div = p0 * p1; // expected-note {{'div' initialized to 0}}
return 1 / div; // expected-note {{Division by zero}} \
// expected-warning {{Division by zero}}
}
} // namespace test_tracking_both_lhs_and_rhs
namespace test_tracking_of_multiplier_and_parens {
int f(int x, int y, int z) {
bool p0 = x < 0; // expected-note {{Assuming 'x' is >= 0}} \
// expected-note {{'p0' initialized to 0}}
int div = y*(z*p0); // expected-note {{'div' initialized to 0}}
return 1 / div; // expected-note {{Division by zero}} \
// expected-warning {{Division by zero}}
}
} // namespace test_tracking_of_multiplier_and_parens
namespace test_tracking_of_divisible {
int f(int x, int y) {
bool p0 = x < 0; // expected-note {{Assuming 'x' is >= 0}} \
// expected-note {{'p0' initialized to 0}}
int div = p0 / y; // expected-note {{'div' initialized to 0}}
return 1 / div; // expected-note {{Division by zero}} \
// expected-warning {{Division by zero}}
}
} // namespace test_tracking_of_divisible
namespace test_tracking_of_modulo {
int f(int x, int y) {
bool p0 = x < 0; // expected-note {{Assuming 'x' is >= 0}} \
// expected-note {{'p0' initialized to 0}}
int div = p0 % y; // expected-note {{'div' initialized to 0}}
return 1 / div; // expected-note {{Division by zero}} \
// expected-warning {{Division by zero}}
}
} // namespace test_tracking_of_modulo
namespace test_tracking_of_assignment {
int f(int x) {
bool p0 = x < 0; // expected-note {{Assuming 'x' is >= 0}} \
// expected-note {{'p0' initialized to 0}}
int div = 1;
div *= p0; // expected-note {{The value 0 is assigned to 'div'}}
return 1 / div; // expected-note {{Division by zero}} \
// expected-warning {{Division by zero}}
}
} // namespace test_tracking_of_assignment
|
