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
|
// RUN: %clang_cc1 -analyze -analyzer-check-objc-mem -analyzer-experimental-checks -analyzer-store region -verify %s
typedef __typeof__(sizeof(int)) size_t;
typedef struct _IO_FILE FILE;
#define SEEK_SET 0 /* Seek from beginning of file. */
#define SEEK_CUR 1 /* Seek from current position. */
#define SEEK_END 2 /* Seek from end of file. */
extern FILE *fopen(const char *path, const char *mode);
extern size_t fread(void *ptr, size_t size, size_t nmemb, FILE *stream);
extern int fseek (FILE *__stream, long int __off, int __whence);
extern long int ftell (FILE *__stream);
extern void rewind (FILE *__stream);
void f1(void) {
FILE *p = fopen("foo", "r");
char buf[1024];
fread(buf, 1, 1, p); // expected-warning {{Stream pointer might be NULL.}}
}
void f2(void) {
FILE *p = fopen("foo", "r");
fseek(p, 1, SEEK_SET); // expected-warning {{Stream pointer might be NULL.}}
}
void f3(void) {
FILE *p = fopen("foo", "r");
ftell(p); // expected-warning {{Stream pointer might be NULL.}}
}
void f4(void) {
FILE *p = fopen("foo", "r");
rewind(p); // expected-warning {{Stream pointer might be NULL.}}
}
void f5(void) {
FILE *p = fopen("foo", "r");
if (!p)
return;
fseek(p, 1, SEEK_SET); // no-warning
fseek(p, 1, 3); // expected-warning {{The whence argument to fseek() should be SEEK_SET, SEEK_END, or SEEK_CUR.}}
}
|
