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
70
71
|
/* $OpenBSD: longjmp.c,v 1.4 2002/02/18 11:27:45 art Exp $ */
/*
* Artur Grabowski <art@openbsd.org>, 2002 Public Domain.
*/
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <setjmp.h>
#include <err.h>
#include <sys/types.h>
#include <sys/time.h>
#include <sys/resource.h>
jmp_buf buf;
/*
* When longjmp is passed the incorrect arg (0), it should translate it into
* something better.
*
* The rlimit is here in case we start spinning.
*/
int
main(int argc, char **argv)
{
struct rlimit rl;
volatile int i, expect;
int (*sj)(jmp_buf);
void (*lj)(jmp_buf, int);
int ch;
extern char *__progname;
sj = setjmp;
lj = longjmp;
while ((ch = getopt(argc, argv, "_")) != -1) {
switch (ch) {
case '_':
sj = _setjmp;
lj = _longjmp;
break;
default:
fprintf(stderr, "Usage: %s [-_]\n", __progname);
exit(1);
}
}
rl.rlim_cur = 2;
rl.rlim_max = 2;
if (setrlimit(RLIMIT_CPU, &rl) < 0)
err(1, "setrlimit");
expect = 0;
i = (*sj)(buf);
if (i == 0 && expect != 0)
errx(1, "setjmp returns 0 on longjmp(.., 0)");
if (expect == 0) {
expect = -1;
(*lj)(buf, 0);
}
expect = 0;
i = (*sj)(buf);
if (i != expect)
errx(1, "bad return from setjmp %d/%d", expect, i);
if (expect < 1000)
(*lj)(buf, expect += 2);
return 0;
}
|
