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
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
|
/* { dg-do run } */
/* { dg-options "-fsanitize=signed-integer-overflow -Wno-unused-variable" } */
#include <stdio.h>
#define SCHAR_MAX __SCHAR_MAX__
#define SCHAR_MIN (-__SCHAR_MAX__ - 1)
#define SHRT_MAX __SHRT_MAX__
#define SHRT_MIN (-__SHRT_MAX__ - 1)
#define INT_MAX __INT_MAX__
#define INT_MIN (-__INT_MAX__ - 1)
void __attribute__((noinline,noclone))
check (int i, int j)
{
if (i != j)
__builtin_abort ();
}
int
main (void)
{
fputs ("UBSAN TEST START\n", stderr);
#if __INT_MAX__ == 2147483647
/* Here, nothing should fail. */
volatile int i = -1;
volatile int j = INT_MIN;
volatile int k = j - i;
check (k, -2147483647);
k = i - j;
check (k, 2147483647);
j++;
check (j, -2147483647);
i = 1;
j = INT_MAX;
k = i - j;
check (k, -2147483646);
k = j - i;
check (k, 2147483646);
j--;
check (k, 2147483646);
#endif
/* Test integer promotion. */
#if __SCHAR_MAX__ == 127
volatile signed char a = SCHAR_MIN;
volatile signed char b = 1;
volatile signed char c = a - b;
check (c, 127);
a--;
check (a, 127);
#endif
#if __SHRT_MAX__ == 32767
volatile short d = SHRT_MIN;
volatile short e = 1;
volatile short f = d - e;
check (f, 32767);
d--;
check (d, 32767);
#endif
fputs ("UBSAN TEST END\n", stderr);
return 0;
}
/* { dg-output "UBSAN TEST START(\n|\r\n|\r)UBSAN TEST END" } */
|
