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
|
/* $OpenBSD: signal.c,v 1.5 2003/07/31 21:48:06 deraadt Exp $ */
/* David Leonard <d@openbsd.org>, 2001. Public Domain. */
/*
* This program tests signal handler re-entrancy.
*/
#include <pthread.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <signal.h>
#include "test.h"
volatile int alarmed;
static void *
sleeper(void *arg)
{
sigset_t mask;
/* Ignore all signals in this thread */
sigfillset(&mask);
CHECKe(sigprocmask(SIG_SETMASK, &mask, NULL));
ASSERT(sleep(3) == 0);
CHECKe(write(STDOUT_FILENO, "\n", 1));
SUCCEED;
}
static void
handler(int sig)
{
int save_errno = errno;
alarmed = 1;
alarm(1);
signal(SIGALRM, handler);
errno = save_errno;
}
int
main(int argc, char *argv[])
{
pthread_t slpr;
ASSERT(signal(SIGALRM, handler) != SIG_ERR);
CHECKe(alarm(1));
CHECKr(pthread_create(&slpr, NULL, sleeper, NULL));
/* ASSERT(sleep(1) == 0); */
for (;;) {
if (alarmed) {
alarmed = 0;
CHECKe(write(STDOUT_FILENO, "!", 1));
}
}
}
|
