forked from OSchip/llvm-project
86 lines
2.2 KiB
C
86 lines
2.2 KiB
C
// RUN: %clang_cc1 -analyze -analyzer-checker=unix.experimental.Stream -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 FILE *tmpfile(void);
|
|
extern int fclose(FILE *fp);
|
|
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.}}
|
|
fclose(p);
|
|
}
|
|
|
|
void f2(void) {
|
|
FILE *p = fopen("foo", "r");
|
|
fseek(p, 1, SEEK_SET); // expected-warning {{Stream pointer might be NULL.}}
|
|
fclose(p);
|
|
}
|
|
|
|
void f3(void) {
|
|
FILE *p = fopen("foo", "r");
|
|
ftell(p); // expected-warning {{Stream pointer might be NULL.}}
|
|
fclose(p);
|
|
}
|
|
|
|
void f4(void) {
|
|
FILE *p = fopen("foo", "r");
|
|
rewind(p); // expected-warning {{Stream pointer might be NULL.}}
|
|
fclose(p);
|
|
}
|
|
|
|
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.}}
|
|
fclose(p);
|
|
}
|
|
|
|
void f6(void) {
|
|
FILE *p = fopen("foo", "r");
|
|
fclose(p);
|
|
fclose(p); // expected-warning {{Try to close a file Descriptor already closed. Cause undefined behaviour.}}
|
|
}
|
|
|
|
void f7(void) {
|
|
FILE *p = tmpfile();
|
|
ftell(p); // expected-warning {{Stream pointer might be NULL.}}
|
|
fclose(p);
|
|
}
|
|
|
|
void f8(int c) {
|
|
FILE *p = fopen("foo.c", "r");
|
|
if(c)
|
|
return; // expected-warning {{Opened File never closed. Potential Resource leak.}}
|
|
fclose(p);
|
|
}
|
|
|
|
FILE *f9(void) {
|
|
FILE *p = fopen("foo.c", "r");
|
|
if (p)
|
|
return p; // no-warning
|
|
else
|
|
return 0;
|
|
}
|
|
|
|
void pr7831(FILE *fp) {
|
|
fclose(fp); // no-warning
|
|
}
|
|
|
|
// PR 8081 - null pointer crash when 'whence' is not an integer constant
|
|
void pr8081(FILE *stream, long offset, int whence) {
|
|
fseek(stream, offset, whence);
|
|
}
|
|
|