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
|
void abort(void);
void exit(int);
struct baz
{
char a[17];
char b[3];
unsigned int c;
unsigned int d;
};
void foo(struct baz *p, unsigned int c, unsigned int d)
{
__builtin_memcpy (p->b, "abc", 3);
p->c = c;
p->d = d;
}
void bar(struct baz *p, unsigned int c, unsigned int d)
{
({ void *s = (p);
__builtin_memset (s, '\0', sizeof (struct baz));
s; });
__builtin_memcpy (p->a, "01234567890123456", 17);
__builtin_memcpy (p->b, "abc", 3);
p->c = c;
p->d = d;
}
int main()
{
struct baz p;
foo(&p, 71, 18);
if (p.c != 71 || p.d != 18)
abort();
bar(&p, 59, 26);
if (p.c != 59 || p.d != 26)
abort();
exit(0);
}
|