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typedef struct FILE FILE;
FILE* fopen (const char*, const char*);
int fclose (FILE*);
#define SEEK_SET 0
int fseek (FILE *, long int, int);
void
test_1 (const char *path)
{
FILE *f = fopen (path, "r"); /* { dg-message "opened here" } */
if (!f)
return;
fclose (f); /* { dg-message "\\(4\\) \\.\\.\\.to here" "to here" } */
/* { dg-message "\\(5\\) first 'fclose' here" "first fclose" { target *-*-* } .-1 } */
fclose (f); /* { dg-warning "double 'fclose' of FILE 'f' \\\[CWE-1341\\\]" "warning" } */
/* { dg-message "second 'fclose' here; first 'fclose' was at \\(5\\)" "second fclose" { target *-*-* } .-1 } */
}
/* Swallow -Wuse-after-free issued for the same problem
{ dg-prune-output "-Wuse-after-free" } */
void
test_2 (const char *src, const char *dst)
{
FILE *f_in = fopen (src, "r"); /* { dg-message "\\(1\\) opened here" } */
if (!f_in)
return;
FILE *f_out = fopen (src, "w");
if (!f_out)
return; /* { dg-warning "leak of FILE 'f_in'" "warning" } */
/* { dg-message "\\(7\\) 'f_in' leaks here; was opened at \\(1\\)" "event" { target *-*-* } .-1 } */
fclose (f_out);
fclose (f_in);
}
void
test_3 (const char *path)
{
FILE *f = fopen (path, "r"); /* { dg-message "opened here" } */
return; /* { dg-warning "leak of FILE 'f'" } */
}
void
test_4 (const char *path)
{
FILE *f = fopen (path, "r"); /* { dg-message "opened here" } */
/* Ensure we know about common fns that are known to not close the
file (e.g. "fseek"). */
fseek (f, 1024, SEEK_SET);
return; /* { dg-warning "leak of FILE 'f'" } */
}
void
test_5 (const char *path)
{
FILE *f = fopen (path, "r"); /* { dg-message "opened here" } */
return; /* { dg-warning "leak of FILE 'f'" } */
}
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