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
40
41
42
43
44
45
46
47
48
49
50
51
52
53
|
/* Test of setjmp()/longjmp() functions: jmp_buf bounds.
$Id: setjmp-3.c,v 1.1.2.2 2008/03/24 11:29:55 dmix Exp $ */
#include <stdlib.h>
#include <setjmp.h>
struct {
char beg[16];
jmp_buf env;
char end[16];
} buf;
volatile int one = 1; /* to suppress optimization */
void foo (void)
{
longjmp (buf.env, one);
}
int main ()
{
volatile unsigned char fill = 0;
void * volatile p; /* Avr-gcc >= 4.1.2 outputs incorrect
warning without 'volatile'. */
do {
/* filling */
for (p = &buf; p != (void *)&buf + sizeof (buf); p++)
*(char *)p = fill;
/* buf.env usage */
switch (setjmp (buf.env)) {
case 1:
break;
case 0:
foo ();
default:
exit (__LINE__);
}
/* checking */
for (p = &buf; p != (void *)&buf + sizeof (buf); p++) {
if (*(unsigned char *)p != fill
&& (p < (void *)&buf.env
|| p >= (void *)&buf.env + sizeof(buf.env)))
{
exit (__LINE__);
}
}
} while (++fill);
return 0;
}
|
