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
|
// RUN: %clang_cc1 -analyze -analyzer-checker=core,experimental.core,debug.ExprInspection -analyzer-store=region -analyzer-constraints=basic -analyzer-ipa=all -verify %s
// RUN: %clang_cc1 -analyze -analyzer-checker=core,experimental.core,debug.ExprInspection -analyzer-store=region -analyzer-constraints=range -analyzer-ipa=all -verify %s
void clang_analyzer_eval(int);
int string_literal_init() {
char a[] = "abc";
char b[2] = "abc"; // expected-warning{{too long}}
char c[5] = "abc";
clang_analyzer_eval(a[1] == 'b'); // expected-warning{{TRUE}}
clang_analyzer_eval(b[1] == 'b'); // expected-warning{{TRUE}}
clang_analyzer_eval(c[1] == 'b'); // expected-warning{{TRUE}}
clang_analyzer_eval(a[3] == 0); // expected-warning{{TRUE}}
clang_analyzer_eval(c[3] == 0); // expected-warning{{TRUE}}
clang_analyzer_eval(c[4] == 0); // expected-warning{{TRUE}}
return 42;
}
void nested_compound_literals(int rad) {
int vec[6][2] = {{0.195, 0.02}, {0.383, 0.067}, {0.55, 0.169}, // expected-warning 6 {{implicit conversion from 'double' to 'int' changes value from}}
{0.831, 0.45}, {0.924, 0.617}, {0.98, 0.805}}; // expected-warning 6 {{implicit conversion from 'double' to 'int' changes value from}}
int a;
for (a = 0; a < 6; ++a) {
vec[a][0] *= rad; // no-warning
vec[a][1] *= rad; // no-warning
}
}
void nested_compound_literals_float(float rad) {
float vec[6][2] = {{0.195, 0.02}, {0.383, 0.067}, {0.55, 0.169},
{0.831, 0.45}, {0.924, 0.617}, {0.98, 0.805}};
int a;
for (a = 0; a < 6; ++a) {
vec[a][0] *= rad; // no-warning
vec[a][1] *= rad; // no-warning
}
}
void struct_as_array() {
struct simple { int x; int y; };
struct simple a;
struct simple *p = &a;
p->x = 5;
clang_analyzer_eval(a.x == 5); // expected-warning{{TRUE}}
clang_analyzer_eval(p[0].x == 5); // expected-warning{{TRUE}}
p[0].y = 5;
clang_analyzer_eval(a.y == 5); // expected-warning{{TRUE}}
clang_analyzer_eval(p->y == 5); // expected-warning{{TRUE}}
}
// PR13264 / <rdar://problem/11802440>
struct point { int x; int y; };
struct circle { struct point o; int r; };
struct circle get_circle() {
struct circle result;
result.r = 5;
result.o = (struct point){0, 0};
return result;
}
void struct_in_struct() {
struct circle c;
c = get_circle();
// This used to think c.r was undefined because c.o is a LazyCompoundVal.
clang_analyzer_eval(c.r == 5); // expected-warning{{TRUE}}
}
// We also test with floats because we don't model floats right now,
// and the original bug report used a float.
struct circle_f { struct point o; float r; };
struct circle_f get_circle_f() {
struct circle_f result;
result.r = 5.0;
result.o = (struct point){0, 0};
return result;
}
float struct_in_struct_f() {
struct circle_f c;
c = get_circle_f();
return c.r; // no-warning
}
|
