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
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
|
/* This testcase is part of GDB, the GNU debugger.
Copyright 2021-2023 Free Software Foundation, Inc.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>. */
#include <pthread.h>
#include <unistd.h>
#include <assert.h>
static volatile int release_forking_thread = 0;
static int x;
static pthread_barrier_t barrier;
static void
break_here (void)
{
x++;
}
static void
do_fork (void)
{
while (!release_forking_thread);
if (FORK_FUNCTION () == 0)
{
/* We create the file in a separate program that we exec: if FORK_FUNCTION
is vfork, we shouldn't do anything more than an exec. */
execl (TOUCH_FILE_BIN, TOUCH_FILE_BIN, NULL);
}
}
static void *
thread_func (void *p)
{
pthread_barrier_wait (&barrier);
#if defined(MAIN_THREAD_FORKS)
break_here ();
#elif defined(OTHER_THREAD_FORKS)
do_fork ();
#else
# error "MAIN_THREAD_FORKS or OTHER_THREAD_FORKS must be defined"
#endif
}
int
main (void)
{
pthread_t thread;
int ret;
pthread_barrier_init (&barrier, NULL, 2);
alarm (30);
ret = pthread_create (&thread, NULL, thread_func, NULL);
assert (ret == 0);
pthread_barrier_wait (&barrier);
#if defined(MAIN_THREAD_FORKS)
do_fork ();
#elif defined(OTHER_THREAD_FORKS)
break_here ();
#else
# error "MAIN_THREAD_FORKS or OTHER_THREAD_FORKS must be defined"
#endif
pthread_join (thread, NULL);
return 0;
}
|
