Viewing file:  realloc-1.c (2.3 KB) -rw-r--r--
Select action/file-type:
 (+) |  (+) |  (+) | Code (+) | Session (+) |  (+) | SDB (+) |  (+) |  (+) |  (+) |  (+) |  (+) |
/* { dg-additional-options "-Wno-free-nonheap-object" } */
typedef __SIZE_TYPE__ size_t;
#define NULL ((void *)0)
extern void *malloc (size_t __size)
__attribute__ ((__nothrow__ , __leaf__))
__attribute__ ((__malloc__))
__attribute__ ((__alloc_size__ (1)));
extern void *realloc (void *__ptr, size_t __size)
__attribute__ ((__nothrow__ , __leaf__))
__attribute__ ((__warn_unused_result__))
__attribute__ ((__alloc_size__ (2)));
extern void free (void *__ptr)
__attribute__ ((__nothrow__ , __leaf__));
void *test_1 (void *ptr)
{
return realloc (ptr, 1024);
}
void *test_2 (void *ptr)
{
void *p = malloc (1024); /* { dg-message "allocated here" } */
p = realloc (p, 4096); /* { dg-message "when 'realloc' fails" } */
free (p);
} /* { dg-warning "leak of 'p'" } */ // ideally this would be on the realloc stmt
void *test_3 (void *ptr)
{
void *p = malloc (1024);
void *q = realloc (p, 4096);
if (q)
free (q);
else
free (p);
}
void *test_4 (void)
{
return realloc (NULL, 1024);
}
int *test_5 (int *p)
{
*p = 42;
int *q = realloc (p, sizeof(int) * 4); /* { dg-message "when 'realloc' fails" } */
*q = 43; /* { dg-warning "dereference of NULL 'q'" } */
return q;
}
void test_6 (size_t sz)
{
void *p = realloc (NULL, sz);
} /* { dg-warning "leak of 'p'" } */
/* The analyzer should complain about realloc of non-heap. */
void *test_7 (size_t sz)
{
char buf[100]; /* { dg-message "region created on stack here" } */
void *p = realloc (&buf, sz); /* { dg-warning "'realloc' of '&buf' which points to memory on the stack" } */
return p;
}
/* Mismatched allocator. */
struct foo
{
int m_int;
};
extern void foo_release (struct foo *);
extern struct foo *foo_acquire (void)
__attribute__ ((malloc (foo_release)));
void test_8 (void)
{
struct foo *p = foo_acquire ();
void *q = realloc (p, 1024); /* { dg-warning "'p' should have been deallocated with 'foo_release' but was deallocated with 'realloc'" } */
}
/* We should complain about realloc on a freed pointer. */
void test_9 (void *p)
{
free (p);
void *q = realloc (p, 1024); /* { dg-warning "double-'free' of 'p'" } */
}
void test_10 (char *s, int n)
{
__builtin_realloc(s, n); /* { dg-warning "ignoring return value of '__builtin_realloc' declared with attribute 'warn_unused_result'" } */
} /* { dg-warning "leak" } */
|
