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| // RUN: %clang_analyze_cc1 -analyzer-checker=alpha.unix.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);
}
|