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
| // RUN: %clang_analyze_cc1 -analyzer-checker=apiModeling.StdCLibraryFunctions,debug.ExprInspection -verify -analyzer-config eagerly-assume=false %s
// RUN: %clang_analyze_cc1 -triple i686-unknown-linux -analyzer-checker=apiModeling.StdCLibraryFunctions,debug.ExprInspection -verify -analyzer-config eagerly-assume=false %s
// RUN: %clang_analyze_cc1 -triple x86_64-unknown-linux -analyzer-checker=apiModeling.StdCLibraryFunctions,debug.ExprInspection -verify -analyzer-config eagerly-assume=false %s
// RUN: %clang_analyze_cc1 -triple armv7-a15-linux -analyzer-checker=apiModeling.StdCLibraryFunctions,debug.ExprInspection -verify -analyzer-config eagerly-assume=false %s
// RUN: %clang_analyze_cc1 -triple thumbv7-a15-linux -analyzer-checker=apiModeling.StdCLibraryFunctions,debug.ExprInspection -verify -analyzer-config eagerly-assume=false %s
void clang_analyzer_eval(int);
int glob;
typedef struct FILE FILE;
#define EOF -1
int getc(FILE *);
void test_getc(FILE *fp) {
int x;
while ((x = getc(fp)) != EOF) {
clang_analyzer_eval(x > 255); // expected-warning{{FALSE}}
clang_analyzer_eval(x >= 0); // expected-warning{{TRUE}}
}
}
int fgetc(FILE *);
void test_fgets(FILE *fp) {
clang_analyzer_eval(fgetc(fp) < 256); // expected-warning{{TRUE}}
clang_analyzer_eval(fgetc(fp) >= 0); // expected-warning{{UNKNOWN}}
}
typedef typeof(sizeof(int)) size_t;
typedef signed long ssize_t;
ssize_t read(int, void *, size_t);
ssize_t write(int, const void *, size_t);
void test_read_write(int fd, char *buf) {
glob = 1;
ssize_t x = write(fd, buf, 10);
clang_analyzer_eval(glob); // expected-warning{{UNKNOWN}}
if (x >= 0) {
clang_analyzer_eval(x <= 10); // expected-warning{{TRUE}}
ssize_t y = read(fd, &glob, sizeof(glob));
if (y >= 0) {
clang_analyzer_eval(y <= sizeof(glob)); // expected-warning{{TRUE}}
} else {
// -1 overflows on promotion!
clang_analyzer_eval(y <= sizeof(glob)); // expected-warning{{FALSE}}
}
} else {
clang_analyzer_eval(x == -1); // expected-warning{{TRUE}}
}
}
size_t fread(void *, size_t, size_t, FILE *);
size_t fwrite(const void *restrict, size_t, size_t, FILE *restrict);
void test_fread_fwrite(FILE *fp, int *buf) {
size_t x = fwrite(buf, sizeof(int), 10, fp);
clang_analyzer_eval(x <= 10); // expected-warning{{TRUE}}
size_t y = fread(buf, sizeof(int), 10, fp);
clang_analyzer_eval(y <= 10); // expected-warning{{TRUE}}
size_t z = fwrite(buf, sizeof(int), y, fp);
clang_analyzer_eval(z <= y); // expected-warning{{TRUE}}
}
ssize_t getline(char **, size_t *, FILE *);
void test_getline(FILE *fp) {
char *line = 0;
size_t n = 0;
ssize_t len;
while ((len = getline(&line, &n, fp)) != -1) {
clang_analyzer_eval(len == 0); // expected-warning{{FALSE}}
}
}
int isascii(int);
void test_isascii(int x) {
clang_analyzer_eval(isascii(123)); // expected-warning{{TRUE}}
clang_analyzer_eval(isascii(-1)); // expected-warning{{FALSE}}
if (isascii(x)) {
clang_analyzer_eval(x < 128); // expected-warning{{TRUE}}
clang_analyzer_eval(x >= 0); // expected-warning{{TRUE}}
} else {
if (x > 42)
clang_analyzer_eval(x >= 128); // expected-warning{{TRUE}}
else
clang_analyzer_eval(x < 0); // expected-warning{{TRUE}}
}
glob = 1;
isascii('a');
clang_analyzer_eval(glob); // expected-warning{{TRUE}}
}
int islower(int);
void test_islower(int x) {
clang_analyzer_eval(islower('x')); // expected-warning{{TRUE}}
clang_analyzer_eval(islower('X')); // expected-warning{{FALSE}}
if (islower(x))
clang_analyzer_eval(x < 'a'); // expected-warning{{FALSE}}
}
int getchar(void);
void test_getchar() {
int x = getchar();
if (x == EOF)
return;
clang_analyzer_eval(x < 0); // expected-warning{{FALSE}}
clang_analyzer_eval(x < 256); // expected-warning{{TRUE}}
}
int isalpha(int);
void test_isalpha() {
clang_analyzer_eval(isalpha(']')); // expected-warning{{FALSE}}
clang_analyzer_eval(isalpha('Q')); // expected-warning{{TRUE}}
clang_analyzer_eval(isalpha(128)); // expected-warning{{UNKNOWN}}
}
int isalnum(int);
void test_alnum() {
clang_analyzer_eval(isalnum('1')); // expected-warning{{TRUE}}
clang_analyzer_eval(isalnum(')')); // expected-warning{{FALSE}}
}
int isblank(int);
void test_isblank() {
clang_analyzer_eval(isblank('\t')); // expected-warning{{TRUE}}
clang_analyzer_eval(isblank(' ')); // expected-warning{{TRUE}}
clang_analyzer_eval(isblank('\n')); // expected-warning{{FALSE}}
}
int ispunct(int);
void test_ispunct(int x) {
clang_analyzer_eval(ispunct(' ')); // expected-warning{{FALSE}}
clang_analyzer_eval(ispunct(-1)); // expected-warning{{FALSE}}
clang_analyzer_eval(ispunct('#')); // expected-warning{{TRUE}}
clang_analyzer_eval(ispunct('_')); // expected-warning{{TRUE}}
if (ispunct(x))
clang_analyzer_eval(x < 127); // expected-warning{{TRUE}}
}
int isupper(int);
void test_isupper(int x) {
if (isupper(x))
clang_analyzer_eval(x < 'A'); // expected-warning{{FALSE}}
}
int isgraph(int);
int isprint(int);
void test_isgraph_isprint(int x) {
char y = x;
if (isgraph(y))
clang_analyzer_eval(isprint(x)); // expected-warning{{TRUE}}
}
int isdigit(int);
void test_mixed_branches(int x) {
if (isdigit(x)) {
clang_analyzer_eval(isgraph(x)); // expected-warning{{TRUE}}
clang_analyzer_eval(isblank(x)); // expected-warning{{FALSE}}
} else if (isascii(x)) {
// isalnum() bifurcates here.
clang_analyzer_eval(isalnum(x)); // expected-warning{{TRUE}} // expected-warning{{FALSE}}
clang_analyzer_eval(isprint(x)); // expected-warning{{TRUE}} // expected-warning{{FALSE}}
}
}
int isspace(int);
void test_isspace(int x) {
if (!isascii(x))
return;
char y = x;
if (y == ' ')
clang_analyzer_eval(isspace(x)); // expected-warning{{TRUE}}
}
int isxdigit(int);
void test_isxdigit(int x) {
if (isxdigit(x) && isupper(x)) {
clang_analyzer_eval(x >= 'A'); // expected-warning{{TRUE}}
clang_analyzer_eval(x <= 'F'); // expected-warning{{TRUE}}
}
}
void test_call_by_pointer() {
typedef int (*func)(int);
func f = isascii;
clang_analyzer_eval(f('A')); // expected-warning{{TRUE}}
f = ispunct;
clang_analyzer_eval(f('A')); // expected-warning{{FALSE}}
}
|